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-rw-r--r--drivers/pinctrl/bcm/Kconfig48
-rw-r--r--drivers/pinctrl/bcm/Makefile3
-rw-r--r--drivers/pinctrl/bcm/pinctrl-bcm2835.c14
-rw-r--r--drivers/pinctrl/bcm/pinctrl-iproc-gpio.c (renamed from drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c)360
-rw-r--r--drivers/pinctrl/bcm/pinctrl-nsp-gpio.c744
5 files changed, 960 insertions, 209 deletions
diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
index cd11d4d9a..2cc74384c 100644
--- a/drivers/pinctrl/bcm/Kconfig
+++ b/drivers/pinctrl/bcm/Kconfig
@@ -9,6 +9,7 @@ config PINCTRL_BCM281XX
select PINCONF
select GENERIC_PINCONF
select REGMAP_MMIO
+ default ARCH_BCM_MOBILE
help
Say Y here to support Broadcom BCM281xx pinctrl driver, which is used
for the BCM281xx SoC family, including BCM11130, BCM11140, BCM11351,
@@ -20,27 +21,41 @@ config PINCTRL_BCM2835
select PINMUX
select PINCONF
-config PINCTRL_CYGNUS_GPIO
- bool "Broadcom Cygnus GPIO (with PINCONF) driver"
- depends on OF_GPIO && ARCH_BCM_CYGNUS
+config PINCTRL_IPROC_GPIO
+ bool "Broadcom iProc GPIO (with PINCONF) driver"
+ depends on OF_GPIO && (ARCH_BCM_IPROC || COMPILE_TEST)
select GPIOLIB_IRQCHIP
select PINCONF
select GENERIC_PINCONF
- default ARCH_BCM_CYGNUS
+ default ARCH_BCM_IPROC
help
- Say yes here to enable the Broadcom Cygnus GPIO driver.
+ Say yes here to enable the Broadcom iProc GPIO driver.
+
+ The Broadcom iProc based SoCs- Cygnus, NS2, NSP and Stingray, use
+ same GPIO Controller IP hence this driver could be used for all.
The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
the always-ON GPIO controller (CRMU/AON). All 3 GPIO controllers are
supported by this driver.
- All 3 Cygnus GPIO controllers support basic PINCONF functions such
+ The Broadcom NSP has two GPIO controllers including the ChipcommonA
+ GPIO, the ChipcommonB GPIO. Later controller is supported by this
+ driver.
+
+ The Broadcom NS2 has two GPIO controller including the CRMU GPIO,
+ the ChipcommonG GPIO. Both controllers are supported by this driver.
+
+ The Broadcom Stingray GPIO controllers are supported by this driver.
+
+ All above SoCs GPIO controllers support basic PINCONF functions such
as bias pull up, pull down, and drive strength configurations, when
these pins are muxed to GPIO.
- Pins from the ASIU GPIO can be individually muxed to GPIO function,
- through interaction with the Cygnus IOMUX controller.
+ It provides the framework where pins from the individual GPIO can be
+ individually muxed to GPIO function, through interaction with the
+ SoCs IOMUX controller. This features could be used only on SoCs which
+ support individual pin muxing.
config PINCTRL_CYGNUS_MUX
bool "Broadcom Cygnus IOMUX driver"
@@ -54,3 +69,20 @@ config PINCTRL_CYGNUS_MUX
The Broadcom Cygnus IOMUX driver supports group based IOMUX
configuration, with the exception that certain individual pins
can be overrided to GPIO function
+
+config PINCTRL_NSP_GPIO
+ bool "Broadcom NSP GPIO (with PINCONF) driver"
+ depends on OF_GPIO && (ARCH_BCM_NSP || COMPILE_TEST)
+ select GPIOLIB_IRQCHIP
+ select PINCONF
+ select GENERIC_PINCONF
+ default ARCH_BCM_NSP
+ help
+ Say yes here to enable the Broadcom NSP GPIO driver.
+
+ The Broadcom Northstar Plus SoC ChipcommonA GPIO controller is
+ supported by this driver.
+
+ The ChipcommonA GPIO controller support basic PINCONF functions such
+ as bias pull up, pull down, and drive strength configurations, when
+ these pins are muxed to GPIO.
diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
index 2b2f70ee8..6148367d5 100644
--- a/drivers/pinctrl/bcm/Makefile
+++ b/drivers/pinctrl/bcm/Makefile
@@ -2,5 +2,6 @@
obj-$(CONFIG_PINCTRL_BCM281XX) += pinctrl-bcm281xx.o
obj-$(CONFIG_PINCTRL_BCM2835) += pinctrl-bcm2835.o
-obj-$(CONFIG_PINCTRL_CYGNUS_GPIO) += pinctrl-cygnus-gpio.o
+obj-$(CONFIG_PINCTRL_IPROC_GPIO) += pinctrl-iproc-gpio.o
obj-$(CONFIG_PINCTRL_CYGNUS_MUX) += pinctrl-cygnus-mux.o
+obj-$(CONFIG_PINCTRL_NSP_GPIO) += pinctrl-nsp-gpio.o
diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index 2e6ca6963..0f5997ceb 100644
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -23,7 +23,7 @@
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
@@ -337,14 +337,14 @@ static int bcm2835_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset)
{
- struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
+ struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
return bcm2835_gpio_get_bit(pc, GPLEV0, offset);
}
static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
- struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
+ struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
bcm2835_gpio_set_bit(pc, value ? GPSET0 : GPCLR0, offset);
}
@@ -358,7 +358,7 @@ static int bcm2835_gpio_direction_output(struct gpio_chip *chip,
static int bcm2835_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
- struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
+ struct bcm2835_pinctrl *pc = gpiochip_get_data(chip);
return irq_linear_revmap(pc->irq_domain, offset);
}
@@ -795,7 +795,7 @@ static int bcm2835_pctl_dt_node_to_map(struct pinctrl_dev *pctldev,
return 0;
out:
- kfree(maps);
+ bcm2835_pctl_dt_free_map(pctldev, maps, num_pins * maps_per_pin);
return err;
}
@@ -964,7 +964,7 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
return PTR_ERR(pc->base);
pc->gpio_chip = bcm2835_gpio_chip;
- pc->gpio_chip.dev = dev;
+ pc->gpio_chip.parent = dev;
pc->gpio_chip.of_node = np;
pc->irq_domain = irq_domain_add_linear(np, BCM2835_NUM_GPIOS,
@@ -1021,7 +1021,7 @@ static int bcm2835_pinctrl_probe(struct platform_device *pdev)
}
}
- err = gpiochip_add(&pc->gpio_chip);
+ err = gpiochip_add_data(&pc->gpio_chip, pc);
if (err) {
dev_err(dev, "could not add GPIO chip\n");
return err;
diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c b/drivers/pinctrl/bcm/pinctrl-iproc-gpio.c
index 12a48f498..3b2ac8f77 100644
--- a/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
+++ b/drivers/pinctrl/bcm/pinctrl-iproc-gpio.c
@@ -10,14 +10,16 @@
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * This file contains the Broadcom Cygnus GPIO driver that supports 3
- * GPIO controllers on Cygnus including the ASIU GPIO controller, the
+ * This file contains the Broadcom Iproc GPIO driver that supports 3
+ * GPIO controllers on Iproc including the ASIU GPIO controller, the
* chipCommonG GPIO controller, and the always-on GPIO controller. Basic
* PINCONF such as bias pull up/down, and drive strength are also supported
* in this driver.
*
- * Pins from the ASIU GPIO can be individually muxed to GPIO function,
- * through the interaction with the Cygnus IOMUX controller
+ * It provides the functionality where pins from the GPIO can be
+ * individually muxed to GPIO function, if individual pad
+ * configuration is supported, through the interaction with respective
+ * SoCs IOMUX controller.
*/
#include <linux/kernel.h>
@@ -34,42 +36,42 @@
#include "../pinctrl-utils.h"
-#define CYGNUS_GPIO_DATA_IN_OFFSET 0x00
-#define CYGNUS_GPIO_DATA_OUT_OFFSET 0x04
-#define CYGNUS_GPIO_OUT_EN_OFFSET 0x08
-#define CYGNUS_GPIO_INT_TYPE_OFFSET 0x0c
-#define CYGNUS_GPIO_INT_DE_OFFSET 0x10
-#define CYGNUS_GPIO_INT_EDGE_OFFSET 0x14
-#define CYGNUS_GPIO_INT_MSK_OFFSET 0x18
-#define CYGNUS_GPIO_INT_STAT_OFFSET 0x1c
-#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
-#define CYGNUS_GPIO_INT_CLR_OFFSET 0x24
-#define CYGNUS_GPIO_PAD_RES_OFFSET 0x34
-#define CYGNUS_GPIO_RES_EN_OFFSET 0x38
+#define IPROC_GPIO_DATA_IN_OFFSET 0x00
+#define IPROC_GPIO_DATA_OUT_OFFSET 0x04
+#define IPROC_GPIO_OUT_EN_OFFSET 0x08
+#define IPROC_GPIO_INT_TYPE_OFFSET 0x0c
+#define IPROC_GPIO_INT_DE_OFFSET 0x10
+#define IPROC_GPIO_INT_EDGE_OFFSET 0x14
+#define IPROC_GPIO_INT_MSK_OFFSET 0x18
+#define IPROC_GPIO_INT_STAT_OFFSET 0x1c
+#define IPROC_GPIO_INT_MSTAT_OFFSET 0x20
+#define IPROC_GPIO_INT_CLR_OFFSET 0x24
+#define IPROC_GPIO_PAD_RES_OFFSET 0x34
+#define IPROC_GPIO_RES_EN_OFFSET 0x38
/* drive strength control for ASIU GPIO */
-#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
+#define IPROC_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
/* drive strength control for CCM/CRMU (AON) GPIO */
-#define CYGNUS_GPIO_DRV0_CTRL_OFFSET 0x00
+#define IPROC_GPIO_DRV0_CTRL_OFFSET 0x00
#define GPIO_BANK_SIZE 0x200
#define NGPIOS_PER_BANK 32
#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
-#define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + (reg))
-#define CYGNUS_GPIO_SHIFT(pin) ((pin) % NGPIOS_PER_BANK)
+#define IPROC_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + (reg))
+#define IPROC_GPIO_SHIFT(pin) ((pin) % NGPIOS_PER_BANK)
#define GPIO_DRV_STRENGTH_BIT_SHIFT 20
#define GPIO_DRV_STRENGTH_BITS 3
#define GPIO_DRV_STRENGTH_BIT_MASK ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
/*
- * Cygnus GPIO core
+ * Iproc GPIO core
*
* @dev: pointer to device
- * @base: I/O register base for Cygnus GPIO controller
- * @io_ctrl: I/O register base for certain type of Cygnus GPIO controller that
+ * @base: I/O register base for Iproc GPIO controller
+ * @io_ctrl: I/O register base for certain type of Iproc GPIO controller that
* has the PINCONF support implemented outside of the GPIO block
* @lock: lock to protect access to I/O registers
* @gc: GPIO chip
@@ -79,7 +81,7 @@
* @pctl: pointer to pinctrl_dev
* @pctldesc: pinctrl descriptor
*/
-struct cygnus_gpio {
+struct iproc_gpio {
struct device *dev;
void __iomem *base;
@@ -96,33 +98,33 @@ struct cygnus_gpio {
struct pinctrl_desc pctldesc;
};
-static inline struct cygnus_gpio *to_cygnus_gpio(struct gpio_chip *gc)
+static inline struct iproc_gpio *to_iproc_gpio(struct gpio_chip *gc)
{
- return container_of(gc, struct cygnus_gpio, gc);
+ return container_of(gc, struct iproc_gpio, gc);
}
/*
* Mapping from PINCONF pins to GPIO pins is 1-to-1
*/
-static inline unsigned cygnus_pin_to_gpio(unsigned pin)
+static inline unsigned iproc_pin_to_gpio(unsigned pin)
{
return pin;
}
/**
- * cygnus_set_bit - set or clear one bit (corresponding to the GPIO pin) in a
- * Cygnus GPIO register
+ * iproc_set_bit - set or clear one bit (corresponding to the GPIO pin) in a
+ * Iproc GPIO register
*
- * @cygnus_gpio: Cygnus GPIO device
+ * @iproc_gpio: Iproc GPIO device
* @reg: register offset
* @gpio: GPIO pin
* @set: set or clear
*/
-static inline void cygnus_set_bit(struct cygnus_gpio *chip, unsigned int reg,
+static inline void iproc_set_bit(struct iproc_gpio *chip, unsigned int reg,
unsigned gpio, bool set)
{
- unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
- unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+ unsigned int offset = IPROC_GPIO_REG(gpio, reg);
+ unsigned int shift = IPROC_GPIO_SHIFT(gpio);
u32 val;
val = readl(chip->base + offset);
@@ -133,19 +135,19 @@ static inline void cygnus_set_bit(struct cygnus_gpio *chip, unsigned int reg,
writel(val, chip->base + offset);
}
-static inline bool cygnus_get_bit(struct cygnus_gpio *chip, unsigned int reg,
+static inline bool iproc_get_bit(struct iproc_gpio *chip, unsigned int reg,
unsigned gpio)
{
- unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
- unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+ unsigned int offset = IPROC_GPIO_REG(gpio, reg);
+ unsigned int shift = IPROC_GPIO_SHIFT(gpio);
return !!(readl(chip->base + offset) & BIT(shift));
}
-static void cygnus_gpio_irq_handler(struct irq_desc *desc)
+static void iproc_gpio_irq_handler(struct irq_desc *desc)
{
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
struct irq_chip *irq_chip = irq_desc_get_chip(desc);
int i, bit;
@@ -154,7 +156,7 @@ static void cygnus_gpio_irq_handler(struct irq_desc *desc)
/* go through the entire GPIO banks and handle all interrupts */
for (i = 0; i < chip->num_banks; i++) {
unsigned long val = readl(chip->base + (i * GPIO_BANK_SIZE) +
- CYGNUS_GPIO_INT_MSTAT_OFFSET);
+ IPROC_GPIO_INT_MSTAT_OFFSET);
for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
unsigned pin = NGPIOS_PER_BANK * i + bit;
@@ -165,7 +167,7 @@ static void cygnus_gpio_irq_handler(struct irq_desc *desc)
* handler, so we do not leave any window
*/
writel(BIT(bit), chip->base + (i * GPIO_BANK_SIZE) +
- CYGNUS_GPIO_INT_CLR_OFFSET);
+ IPROC_GPIO_INT_CLR_OFFSET);
generic_handle_irq(child_irq);
}
@@ -175,60 +177,60 @@ static void cygnus_gpio_irq_handler(struct irq_desc *desc)
}
-static void cygnus_gpio_irq_ack(struct irq_data *d)
+static void iproc_gpio_irq_ack(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
unsigned gpio = d->hwirq;
- unsigned int offset = CYGNUS_GPIO_REG(gpio,
- CYGNUS_GPIO_INT_CLR_OFFSET);
- unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+ unsigned int offset = IPROC_GPIO_REG(gpio,
+ IPROC_GPIO_INT_CLR_OFFSET);
+ unsigned int shift = IPROC_GPIO_SHIFT(gpio);
u32 val = BIT(shift);
writel(val, chip->base + offset);
}
/**
- * cygnus_gpio_irq_set_mask - mask/unmask a GPIO interrupt
+ * iproc_gpio_irq_set_mask - mask/unmask a GPIO interrupt
*
* @d: IRQ chip data
* @unmask: mask/unmask GPIO interrupt
*/
-static void cygnus_gpio_irq_set_mask(struct irq_data *d, bool unmask)
+static void iproc_gpio_irq_set_mask(struct irq_data *d, bool unmask)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
unsigned gpio = d->hwirq;
- cygnus_set_bit(chip, CYGNUS_GPIO_INT_MSK_OFFSET, gpio, unmask);
+ iproc_set_bit(chip, IPROC_GPIO_INT_MSK_OFFSET, gpio, unmask);
}
-static void cygnus_gpio_irq_mask(struct irq_data *d)
+static void iproc_gpio_irq_mask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
- cygnus_gpio_irq_set_mask(d, false);
+ iproc_gpio_irq_set_mask(d, false);
spin_unlock_irqrestore(&chip->lock, flags);
}
-static void cygnus_gpio_irq_unmask(struct irq_data *d)
+static void iproc_gpio_irq_unmask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
- cygnus_gpio_irq_set_mask(d, true);
+ iproc_gpio_irq_set_mask(d, true);
spin_unlock_irqrestore(&chip->lock, flags);
}
-static int cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+static int iproc_gpio_irq_set_type(struct irq_data *d, unsigned int type)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
unsigned gpio = d->hwirq;
bool level_triggered = false;
bool dual_edge = false;
@@ -263,10 +265,10 @@ static int cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
}
spin_lock_irqsave(&chip->lock, flags);
- cygnus_set_bit(chip, CYGNUS_GPIO_INT_TYPE_OFFSET, gpio,
+ iproc_set_bit(chip, IPROC_GPIO_INT_TYPE_OFFSET, gpio,
level_triggered);
- cygnus_set_bit(chip, CYGNUS_GPIO_INT_DE_OFFSET, gpio, dual_edge);
- cygnus_set_bit(chip, CYGNUS_GPIO_INT_EDGE_OFFSET, gpio,
+ iproc_set_bit(chip, IPROC_GPIO_INT_DE_OFFSET, gpio, dual_edge);
+ iproc_set_bit(chip, IPROC_GPIO_INT_EDGE_OFFSET, gpio,
rising_or_high);
spin_unlock_irqrestore(&chip->lock, flags);
@@ -277,32 +279,32 @@ static int cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
return 0;
}
-static struct irq_chip cygnus_gpio_irq_chip = {
- .name = "bcm-cygnus-gpio",
- .irq_ack = cygnus_gpio_irq_ack,
- .irq_mask = cygnus_gpio_irq_mask,
- .irq_unmask = cygnus_gpio_irq_unmask,
- .irq_set_type = cygnus_gpio_irq_set_type,
+static struct irq_chip iproc_gpio_irq_chip = {
+ .name = "bcm-iproc-gpio",
+ .irq_ack = iproc_gpio_irq_ack,
+ .irq_mask = iproc_gpio_irq_mask,
+ .irq_unmask = iproc_gpio_irq_unmask,
+ .irq_set_type = iproc_gpio_irq_set_type,
};
/*
- * Request the Cygnus IOMUX pinmux controller to mux individual pins to GPIO
+ * Request the Iproc IOMUX pinmux controller to mux individual pins to GPIO
*/
-static int cygnus_gpio_request(struct gpio_chip *gc, unsigned offset)
+static int iproc_gpio_request(struct gpio_chip *gc, unsigned offset)
{
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
unsigned gpio = gc->base + offset;
- /* not all Cygnus GPIO pins can be muxed individually */
+ /* not all Iproc GPIO pins can be muxed individually */
if (!chip->pinmux_is_supported)
return 0;
return pinctrl_request_gpio(gpio);
}
-static void cygnus_gpio_free(struct gpio_chip *gc, unsigned offset)
+static void iproc_gpio_free(struct gpio_chip *gc, unsigned offset)
{
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
unsigned gpio = gc->base + offset;
if (!chip->pinmux_is_supported)
@@ -311,13 +313,13 @@ static void cygnus_gpio_free(struct gpio_chip *gc, unsigned offset)
pinctrl_free_gpio(gpio);
}
-static int cygnus_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
+static int iproc_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
{
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
- cygnus_set_bit(chip, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, false);
+ iproc_set_bit(chip, IPROC_GPIO_OUT_EN_OFFSET, gpio, false);
spin_unlock_irqrestore(&chip->lock, flags);
dev_dbg(chip->dev, "gpio:%u set input\n", gpio);
@@ -325,15 +327,15 @@ static int cygnus_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
return 0;
}
-static int cygnus_gpio_direction_output(struct gpio_chip *gc, unsigned gpio,
+static int iproc_gpio_direction_output(struct gpio_chip *gc, unsigned gpio,
int val)
{
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
- cygnus_set_bit(chip, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, true);
- cygnus_set_bit(chip, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, !!(val));
+ iproc_set_bit(chip, IPROC_GPIO_OUT_EN_OFFSET, gpio, true);
+ iproc_set_bit(chip, IPROC_GPIO_DATA_OUT_OFFSET, gpio, !!(val));
spin_unlock_irqrestore(&chip->lock, flags);
dev_dbg(chip->dev, "gpio:%u set output, value:%d\n", gpio, val);
@@ -341,29 +343,29 @@ static int cygnus_gpio_direction_output(struct gpio_chip *gc, unsigned gpio,
return 0;
}
-static void cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio, int val)
+static void iproc_gpio_set(struct gpio_chip *gc, unsigned gpio, int val)
{
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
- cygnus_set_bit(chip, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, !!(val));
+ iproc_set_bit(chip, IPROC_GPIO_DATA_OUT_OFFSET, gpio, !!(val));
spin_unlock_irqrestore(&chip->lock, flags);
dev_dbg(chip->dev, "gpio:%u set, value:%d\n", gpio, val);
}
-static int cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
+static int iproc_gpio_get(struct gpio_chip *gc, unsigned gpio)
{
- struct cygnus_gpio *chip = to_cygnus_gpio(gc);
- unsigned int offset = CYGNUS_GPIO_REG(gpio,
- CYGNUS_GPIO_DATA_IN_OFFSET);
- unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+ struct iproc_gpio *chip = to_iproc_gpio(gc);
+ unsigned int offset = IPROC_GPIO_REG(gpio,
+ IPROC_GPIO_DATA_IN_OFFSET);
+ unsigned int shift = IPROC_GPIO_SHIFT(gpio);
return !!(readl(chip->base + offset) & BIT(shift));
}
-static int cygnus_get_groups_count(struct pinctrl_dev *pctldev)
+static int iproc_get_groups_count(struct pinctrl_dev *pctldev)
{
return 1;
}
@@ -372,20 +374,20 @@ static int cygnus_get_groups_count(struct pinctrl_dev *pctldev)
* Only one group: "gpio_grp", since this local pinctrl device only performs
* GPIO specific PINCONF configurations
*/
-static const char *cygnus_get_group_name(struct pinctrl_dev *pctldev,
+static const char *iproc_get_group_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
return "gpio_grp";
}
-static const struct pinctrl_ops cygnus_pctrl_ops = {
- .get_groups_count = cygnus_get_groups_count,
- .get_group_name = cygnus_get_group_name,
+static const struct pinctrl_ops iproc_pctrl_ops = {
+ .get_groups_count = iproc_get_groups_count,
+ .get_group_name = iproc_get_group_name,
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
.dt_free_map = pinctrl_utils_dt_free_map,
};
-static int cygnus_gpio_set_pull(struct cygnus_gpio *chip, unsigned gpio,
+static int iproc_gpio_set_pull(struct iproc_gpio *chip, unsigned gpio,
bool disable, bool pull_up)
{
unsigned long flags;
@@ -393,11 +395,11 @@ static int cygnus_gpio_set_pull(struct cygnus_gpio *chip, unsigned gpio,
spin_lock_irqsave(&chip->lock, flags);
if (disable) {
- cygnus_set_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio, false);
+ iproc_set_bit(chip, IPROC_GPIO_RES_EN_OFFSET, gpio, false);
} else {
- cygnus_set_bit(chip, CYGNUS_GPIO_PAD_RES_OFFSET, gpio,
+ iproc_set_bit(chip, IPROC_GPIO_PAD_RES_OFFSET, gpio,
pull_up);
- cygnus_set_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio, true);
+ iproc_set_bit(chip, IPROC_GPIO_RES_EN_OFFSET, gpio, true);
}
spin_unlock_irqrestore(&chip->lock, flags);
@@ -407,18 +409,18 @@ static int cygnus_gpio_set_pull(struct cygnus_gpio *chip, unsigned gpio,
return 0;
}
-static void cygnus_gpio_get_pull(struct cygnus_gpio *chip, unsigned gpio,
+static void iproc_gpio_get_pull(struct iproc_gpio *chip, unsigned gpio,
bool *disable, bool *pull_up)
{
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
- *disable = !cygnus_get_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio);
- *pull_up = cygnus_get_bit(chip, CYGNUS_GPIO_PAD_RES_OFFSET, gpio);
+ *disable = !iproc_get_bit(chip, IPROC_GPIO_RES_EN_OFFSET, gpio);
+ *pull_up = iproc_get_bit(chip, IPROC_GPIO_PAD_RES_OFFSET, gpio);
spin_unlock_irqrestore(&chip->lock, flags);
}
-static int cygnus_gpio_set_strength(struct cygnus_gpio *chip, unsigned gpio,
+static int iproc_gpio_set_strength(struct iproc_gpio *chip, unsigned gpio,
unsigned strength)
{
void __iomem *base;
@@ -432,14 +434,14 @@ static int cygnus_gpio_set_strength(struct cygnus_gpio *chip, unsigned gpio,
if (chip->io_ctrl) {
base = chip->io_ctrl;
- offset = CYGNUS_GPIO_DRV0_CTRL_OFFSET;
+ offset = IPROC_GPIO_DRV0_CTRL_OFFSET;
} else {
base = chip->base;
- offset = CYGNUS_GPIO_REG(gpio,
- CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
+ offset = IPROC_GPIO_REG(gpio,
+ IPROC_GPIO_ASIU_DRV0_CTRL_OFFSET);
}
- shift = CYGNUS_GPIO_SHIFT(gpio);
+ shift = IPROC_GPIO_SHIFT(gpio);
dev_dbg(chip->dev, "gpio:%u set drive strength:%d mA\n", gpio,
strength);
@@ -458,7 +460,7 @@ static int cygnus_gpio_set_strength(struct cygnus_gpio *chip, unsigned gpio,
return 0;
}
-static int cygnus_gpio_get_strength(struct cygnus_gpio *chip, unsigned gpio,
+static int iproc_gpio_get_strength(struct iproc_gpio *chip, unsigned gpio,
u16 *strength)
{
void __iomem *base;
@@ -468,14 +470,14 @@ static int cygnus_gpio_get_strength(struct cygnus_gpio *chip, unsigned gpio,
if (chip->io_ctrl) {
base = chip->io_ctrl;
- offset = CYGNUS_GPIO_DRV0_CTRL_OFFSET;
+ offset = IPROC_GPIO_DRV0_CTRL_OFFSET;
} else {
base = chip->base;
- offset = CYGNUS_GPIO_REG(gpio,
- CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
+ offset = IPROC_GPIO_REG(gpio,
+ IPROC_GPIO_ASIU_DRV0_CTRL_OFFSET);
}
- shift = CYGNUS_GPIO_SHIFT(gpio);
+ shift = IPROC_GPIO_SHIFT(gpio);
spin_lock_irqsave(&chip->lock, flags);
*strength = 0;
@@ -493,44 +495,43 @@ static int cygnus_gpio_get_strength(struct cygnus_gpio *chip, unsigned gpio,
return 0;
}
-static int cygnus_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
+static int iproc_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
unsigned long *config)
{
- struct cygnus_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
+ struct iproc_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param = pinconf_to_config_param(*config);
- unsigned gpio = cygnus_pin_to_gpio(pin);
+ unsigned gpio = iproc_pin_to_gpio(pin);
u16 arg;
bool disable, pull_up;
int ret;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
- cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
+ iproc_gpio_get_pull(chip, gpio, &disable, &pull_up);
if (disable)
return 0;
else
return -EINVAL;
case PIN_CONFIG_BIAS_PULL_UP:
- cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
+ iproc_gpio_get_pull(chip, gpio, &disable, &pull_up);
if (!disable && pull_up)
return 0;
else
return -EINVAL;
case PIN_CONFIG_BIAS_PULL_DOWN:
- cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
+ iproc_gpio_get_pull(chip, gpio, &disable, &pull_up);
if (!disable && !pull_up)
return 0;
else
return -EINVAL;
case PIN_CONFIG_DRIVE_STRENGTH:
- ret = cygnus_gpio_get_strength(chip, gpio, &arg);
+ ret = iproc_gpio_get_strength(chip, gpio, &arg);
if (ret)
return ret;
- else
- *config = pinconf_to_config_packed(param, arg);
+ *config = pinconf_to_config_packed(param, arg);
return 0;
@@ -541,13 +542,13 @@ static int cygnus_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
return -ENOTSUPP;
}
-static int cygnus_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
+static int iproc_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
unsigned long *configs, unsigned num_configs)
{
- struct cygnus_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
+ struct iproc_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param;
u16 arg;
- unsigned i, gpio = cygnus_pin_to_gpio(pin);
+ unsigned i, gpio = iproc_pin_to_gpio(pin);
int ret = -ENOTSUPP;
for (i = 0; i < num_configs; i++) {
@@ -556,25 +557,25 @@ static int cygnus_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
- ret = cygnus_gpio_set_pull(chip, gpio, true, false);
+ ret = iproc_gpio_set_pull(chip, gpio, true, false);
if (ret < 0)
goto out;
break;
case PIN_CONFIG_BIAS_PULL_UP:
- ret = cygnus_gpio_set_pull(chip, gpio, false, true);
+ ret = iproc_gpio_set_pull(chip, gpio, false, true);
if (ret < 0)
goto out;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
- ret = cygnus_gpio_set_pull(chip, gpio, false, false);
+ ret = iproc_gpio_set_pull(chip, gpio, false, false);
if (ret < 0)
goto out;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
- ret = cygnus_gpio_set_strength(chip, gpio, arg);
+ ret = iproc_gpio_set_strength(chip, gpio, arg);
if (ret < 0)
goto out;
break;
@@ -589,20 +590,20 @@ out:
return ret;
}
-static const struct pinconf_ops cygnus_pconf_ops = {
+static const struct pinconf_ops iproc_pconf_ops = {
.is_generic = true,
- .pin_config_get = cygnus_pin_config_get,
- .pin_config_set = cygnus_pin_config_set,
+ .pin_config_get = iproc_pin_config_get,
+ .pin_config_set = iproc_pin_config_set,
};
/*
- * Cygnus GPIO controller supports some PINCONF related configurations such as
+ * Iproc GPIO controller supports some PINCONF related configurations such as
* pull up, pull down, and drive strength, when the pin is configured to GPIO
*
* Here a local pinctrl device is created with simple 1-to-1 pin mapping to the
* local GPIO pins
*/
-static int cygnus_gpio_register_pinconf(struct cygnus_gpio *chip)
+static int iproc_gpio_register_pinconf(struct iproc_gpio *chip)
{
struct pinctrl_desc *pctldesc = &chip->pctldesc;
struct pinctrl_pin_desc *pins;
@@ -622,10 +623,10 @@ static int cygnus_gpio_register_pinconf(struct cygnus_gpio *chip)
}
pctldesc->name = dev_name(chip->dev);
- pctldesc->pctlops = &cygnus_pctrl_ops;
+ pctldesc->pctlops = &iproc_pctrl_ops;
pctldesc->pins = pins;
pctldesc->npins = gc->ngpio;
- pctldesc->confops = &cygnus_pconf_ops;
+ pctldesc->confops = &iproc_pconf_ops;
chip->pctl = pinctrl_register(pctldesc, chip->dev, chip);
if (IS_ERR(chip->pctl)) {
@@ -636,59 +637,27 @@ static int cygnus_gpio_register_pinconf(struct cygnus_gpio *chip)
return 0;
}
-static void cygnus_gpio_unregister_pinconf(struct cygnus_gpio *chip)
+static void iproc_gpio_unregister_pinconf(struct iproc_gpio *chip)
{
- if (chip->pctl)
- pinctrl_unregister(chip->pctl);
+ pinctrl_unregister(chip->pctl);
}
-struct cygnus_gpio_data {
- unsigned num_gpios;
-};
-
-static const struct cygnus_gpio_data cygnus_cmm_gpio_data = {
- .num_gpios = 24,
-};
-
-static const struct cygnus_gpio_data cygnus_asiu_gpio_data = {
- .num_gpios = 146,
+static const struct of_device_id iproc_gpio_of_match[] = {
+ { .compatible = "brcm,cygnus-ccm-gpio" },
+ { .compatible = "brcm,cygnus-asiu-gpio" },
+ { .compatible = "brcm,cygnus-crmu-gpio" },
+ { .compatible = "brcm,iproc-gpio" },
+ { }
};
-static const struct cygnus_gpio_data cygnus_crmu_gpio_data = {
- .num_gpios = 6,
-};
-
-static const struct of_device_id cygnus_gpio_of_match[] = {
- {
- .compatible = "brcm,cygnus-ccm-gpio",
- .data = &cygnus_cmm_gpio_data,
- },
- {
- .compatible = "brcm,cygnus-asiu-gpio",
- .data = &cygnus_asiu_gpio_data,
- },
- {
- .compatible = "brcm,cygnus-crmu-gpio",
- .data = &cygnus_crmu_gpio_data,
- }
-};
-
-static int cygnus_gpio_probe(struct platform_device *pdev)
+static int iproc_gpio_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
- struct cygnus_gpio *chip;
+ struct iproc_gpio *chip;
struct gpio_chip *gc;
u32 ngpios;
int irq, ret;
- const struct of_device_id *match;
- const struct cygnus_gpio_data *gpio_data;
-
- match = of_match_device(cygnus_gpio_of_match, dev);
- if (!match)
- return -ENODEV;
- gpio_data = match->data;
- ngpios = gpio_data->num_gpios;
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
@@ -713,6 +682,11 @@ static int cygnus_gpio_probe(struct platform_device *pdev)
}
}
+ if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
+ dev_err(&pdev->dev, "missing ngpios DT property\n");
+ return -ENODEV;
+ }
+
spin_lock_init(&chip->lock);
gc = &chip->gc;
@@ -720,14 +694,14 @@ static int cygnus_gpio_probe(struct platform_device *pdev)
gc->ngpio = ngpios;
chip->num_banks = (ngpios + NGPIOS_PER_BANK - 1) / NGPIOS_PER_BANK;
gc->label = dev_name(dev);
- gc->dev = dev;
+ gc->parent = dev;
gc->of_node = dev->of_node;
- gc->request = cygnus_gpio_request;
- gc->free = cygnus_gpio_free;
- gc->direction_input = cygnus_gpio_direction_input;
- gc->direction_output = cygnus_gpio_direction_output;
- gc->set = cygnus_gpio_set;
- gc->get = cygnus_gpio_get;
+ gc->request = iproc_gpio_request;
+ gc->free = iproc_gpio_free;
+ gc->direction_input = iproc_gpio_direction_input;
+ gc->direction_output = iproc_gpio_direction_output;
+ gc->set = iproc_gpio_set;
+ gc->get = iproc_gpio_get;
chip->pinmux_is_supported = of_property_read_bool(dev->of_node,
"gpio-ranges");
@@ -738,7 +712,7 @@ static int cygnus_gpio_probe(struct platform_device *pdev)
return ret;
}
- ret = cygnus_gpio_register_pinconf(chip);
+ ret = iproc_gpio_register_pinconf(chip);
if (ret) {
dev_err(dev, "unable to register pinconf\n");
goto err_rm_gpiochip;
@@ -747,21 +721,21 @@ static int cygnus_gpio_probe(struct platform_device *pdev)
/* optional GPIO interrupt support */
irq = platform_get_irq(pdev, 0);
if (irq) {
- ret = gpiochip_irqchip_add(gc, &cygnus_gpio_irq_chip, 0,
+ ret = gpiochip_irqchip_add(gc, &iproc_gpio_irq_chip, 0,
handle_simple_irq, IRQ_TYPE_NONE);
if (ret) {
dev_err(dev, "no GPIO irqchip\n");
goto err_unregister_pinconf;
}
- gpiochip_set_chained_irqchip(gc, &cygnus_gpio_irq_chip, irq,
- cygnus_gpio_irq_handler);
+ gpiochip_set_chained_irqchip(gc, &iproc_gpio_irq_chip, irq,
+ iproc_gpio_irq_handler);
}
return 0;
err_unregister_pinconf:
- cygnus_gpio_unregister_pinconf(chip);
+ iproc_gpio_unregister_pinconf(chip);
err_rm_gpiochip:
gpiochip_remove(gc);
@@ -769,16 +743,16 @@ err_rm_gpiochip:
return ret;
}
-static struct platform_driver cygnus_gpio_driver = {
+static struct platform_driver iproc_gpio_driver = {
.driver = {
- .name = "cygnus-gpio",
- .of_match_table = cygnus_gpio_of_match,
+ .name = "iproc-gpio",
+ .of_match_table = iproc_gpio_of_match,
},
- .probe = cygnus_gpio_probe,
+ .probe = iproc_gpio_probe,
};
-static int __init cygnus_gpio_init(void)
+static int __init iproc_gpio_init(void)
{
- return platform_driver_probe(&cygnus_gpio_driver, cygnus_gpio_probe);
+ return platform_driver_probe(&iproc_gpio_driver, iproc_gpio_probe);
}
-arch_initcall_sync(cygnus_gpio_init);
+arch_initcall_sync(iproc_gpio_init);
diff --git a/drivers/pinctrl/bcm/pinctrl-nsp-gpio.c b/drivers/pinctrl/bcm/pinctrl-nsp-gpio.c
new file mode 100644
index 000000000..ac900435d
--- /dev/null
+++ b/drivers/pinctrl/bcm/pinctrl-nsp-gpio.c
@@ -0,0 +1,744 @@
+/*
+ * Copyright (C) 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * This file contains the Broadcom Northstar Plus (NSP) GPIO driver that
+ * supports the chipCommonA GPIO controller. Basic PINCONF such as bias,
+ * pull up/down, slew and drive strength are also supported in this driver.
+ *
+ * Pins from the chipCommonA GPIO can be individually muxed to GPIO function,
+ * through the interaction with the NSP IOMUX controller.
+ */
+
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/slab.h>
+
+#include "../pinctrl-utils.h"
+
+#define NSP_CHIP_A_INT_STATUS 0x00
+#define NSP_CHIP_A_INT_MASK 0x04
+#define NSP_GPIO_DATA_IN 0x40
+#define NSP_GPIO_DATA_OUT 0x44
+#define NSP_GPIO_OUT_EN 0x48
+#define NSP_GPIO_INT_POLARITY 0x50
+#define NSP_GPIO_INT_MASK 0x54
+#define NSP_GPIO_EVENT 0x58
+#define NSP_GPIO_EVENT_INT_MASK 0x5c
+#define NSP_GPIO_EVENT_INT_POLARITY 0x64
+#define NSP_CHIP_A_GPIO_INT_BIT 0x01
+
+/* I/O parameters offset for chipcommon A GPIO */
+#define NSP_GPIO_DRV_CTRL 0x00
+#define NSP_GPIO_HYSTERESIS_EN 0x10
+#define NSP_GPIO_SLEW_RATE_EN 0x14
+#define NSP_PULL_UP_EN 0x18
+#define NSP_PULL_DOWN_EN 0x1c
+#define GPIO_DRV_STRENGTH_BITS 0x03
+
+/*
+ * nsp GPIO core
+ *
+ * @dev: pointer to device
+ * @base: I/O register base for nsp GPIO controller
+ * @io_ctrl: I/O register base for PINCONF support outside the GPIO block
+ * @gc: GPIO chip
+ * @pctl: pointer to pinctrl_dev
+ * @pctldesc: pinctrl descriptor
+ * @irq_domain: pointer to irq domain
+ * @lock: lock to protect access to I/O registers
+ */
+struct nsp_gpio {
+ struct device *dev;
+ void __iomem *base;
+ void __iomem *io_ctrl;
+ struct gpio_chip gc;
+ struct pinctrl_dev *pctl;
+ struct pinctrl_desc pctldesc;
+ struct irq_domain *irq_domain;
+ spinlock_t lock;
+};
+
+enum base_type {
+ REG,
+ IO_CTRL
+};
+
+/*
+ * Mapping from PINCONF pins to GPIO pins is 1-to-1
+ */
+static inline unsigned nsp_pin_to_gpio(unsigned pin)
+{
+ return pin;
+}
+
+/*
+ * nsp_set_bit - set or clear one bit (corresponding to the GPIO pin) in a
+ * nsp GPIO register
+ *
+ * @nsp_gpio: nsp GPIO device
+ * @base_type: reg base to modify
+ * @reg: register offset
+ * @gpio: GPIO pin
+ * @set: set or clear
+ */
+static inline void nsp_set_bit(struct nsp_gpio *chip, enum base_type address,
+ unsigned int reg, unsigned gpio, bool set)
+{
+ u32 val;
+ void __iomem *base_address;
+
+ if (address == IO_CTRL)
+ base_address = chip->io_ctrl;
+ else
+ base_address = chip->base;
+
+ val = readl(base_address + reg);
+ if (set)
+ val |= BIT(gpio);
+ else
+ val &= ~BIT(gpio);
+
+ writel(val, base_address + reg);
+}
+
+/*
+ * nsp_get_bit - get one bit (corresponding to the GPIO pin) in a
+ * nsp GPIO register
+ */
+static inline bool nsp_get_bit(struct nsp_gpio *chip, enum base_type address,
+ unsigned int reg, unsigned gpio)
+{
+ if (address == IO_CTRL)
+ return !!(readl(chip->io_ctrl + reg) & BIT(gpio));
+ else
+ return !!(readl(chip->base + reg) & BIT(gpio));
+}
+
+static irqreturn_t nsp_gpio_irq_handler(int irq, void *data)
+{
+ struct nsp_gpio *chip = (struct nsp_gpio *)data;
+ struct gpio_chip gc = chip->gc;
+ int bit;
+ unsigned long int_bits = 0;
+ u32 int_status;
+
+ /* go through the entire GPIOs and handle all interrupts */
+ int_status = readl(chip->base + NSP_CHIP_A_INT_STATUS);
+ if (int_status & NSP_CHIP_A_GPIO_INT_BIT) {
+ unsigned int event, level;
+
+ /* Get level and edge interrupts */
+ event = readl(chip->base + NSP_GPIO_EVENT_INT_MASK) &
+ readl(chip->base + NSP_GPIO_EVENT);
+ level = readl(chip->base + NSP_GPIO_DATA_IN) ^
+ readl(chip->base + NSP_GPIO_INT_POLARITY);
+ level &= readl(chip->base + NSP_GPIO_INT_MASK);
+ int_bits = level | event;
+
+ for_each_set_bit(bit, &int_bits, gc.ngpio) {
+ /*
+ * Clear the interrupt before invoking the
+ * handler, so we do not leave any window
+ */
+ writel(BIT(bit), chip->base + NSP_GPIO_EVENT);
+ generic_handle_irq(
+ irq_linear_revmap(chip->irq_domain, bit));
+ }
+ }
+
+ return int_bits ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static void nsp_gpio_irq_ack(struct irq_data *d)
+{
+ struct nsp_gpio *chip = irq_data_get_irq_chip_data(d);
+ unsigned gpio = d->hwirq;
+ u32 val = BIT(gpio);
+ u32 trigger_type;
+
+ trigger_type = irq_get_trigger_type(d->irq);
+ if (trigger_type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
+ nsp_set_bit(chip, REG, NSP_GPIO_EVENT, gpio, val);
+}
+
+/*
+ * nsp_gpio_irq_set_mask - mask/unmask a GPIO interrupt
+ *
+ * @d: IRQ chip data
+ * @unmask: mask/unmask GPIO interrupt
+ */
+static void nsp_gpio_irq_set_mask(struct irq_data *d, bool unmask)
+{
+ struct nsp_gpio *chip = irq_data_get_irq_chip_data(d);
+ unsigned gpio = d->hwirq;
+ u32 trigger_type;
+
+ trigger_type = irq_get_trigger_type(d->irq);
+ if (trigger_type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
+ nsp_set_bit(chip, REG, NSP_GPIO_EVENT_INT_MASK, gpio, unmask);
+ else
+ nsp_set_bit(chip, REG, NSP_GPIO_INT_MASK, gpio, unmask);
+}
+
+static void nsp_gpio_irq_mask(struct irq_data *d)
+{
+ struct nsp_gpio *chip = irq_data_get_irq_chip_data(d);
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ nsp_gpio_irq_set_mask(d, false);
+ spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static void nsp_gpio_irq_unmask(struct irq_data *d)
+{
+ struct nsp_gpio *chip = irq_data_get_irq_chip_data(d);
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ nsp_gpio_irq_set_mask(d, true);
+ spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static int nsp_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ struct nsp_gpio *chip = irq_data_get_irq_chip_data(d);
+ unsigned gpio = d->hwirq;
+ bool level_low;
+ bool falling;
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ falling = nsp_get_bit(chip, REG, NSP_GPIO_EVENT_INT_POLARITY, gpio);
+ level_low = nsp_get_bit(chip, REG, NSP_GPIO_INT_POLARITY, gpio);
+
+ switch (type & IRQ_TYPE_SENSE_MASK) {
+ case IRQ_TYPE_EDGE_RISING:
+ falling = false;
+ break;
+
+ case IRQ_TYPE_EDGE_FALLING:
+ falling = true;
+ break;
+
+ case IRQ_TYPE_LEVEL_HIGH:
+ level_low = false;
+ break;
+
+ case IRQ_TYPE_LEVEL_LOW:
+ level_low = true;
+ break;
+
+ default:
+ dev_err(chip->dev, "invalid GPIO IRQ type 0x%x\n",
+ type);
+ spin_unlock_irqrestore(&chip->lock, flags);
+ return -EINVAL;
+ }
+
+ nsp_set_bit(chip, REG, NSP_GPIO_EVENT_INT_POLARITY, gpio, falling);
+ nsp_set_bit(chip, REG, NSP_GPIO_INT_POLARITY, gpio, level_low);
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ dev_dbg(chip->dev, "gpio:%u level_low:%s falling:%s\n", gpio,
+ level_low ? "true" : "false", falling ? "true" : "false");
+ return 0;
+}
+
+static struct irq_chip nsp_gpio_irq_chip = {
+ .name = "gpio-a",
+ .irq_enable = nsp_gpio_irq_unmask,
+ .irq_disable = nsp_gpio_irq_mask,
+ .irq_ack = nsp_gpio_irq_ack,
+ .irq_mask = nsp_gpio_irq_mask,
+ .irq_unmask = nsp_gpio_irq_unmask,
+ .irq_set_type = nsp_gpio_irq_set_type,
+};
+
+/*
+ * Request the nsp IOMUX pinmux controller to mux individual pins to GPIO
+ */
+static int nsp_gpio_request(struct gpio_chip *gc, unsigned offset)
+{
+ unsigned gpio = gc->base + offset;
+
+ return pinctrl_request_gpio(gpio);
+}
+
+static void nsp_gpio_free(struct gpio_chip *gc, unsigned offset)
+{
+ unsigned gpio = gc->base + offset;
+
+ pinctrl_free_gpio(gpio);
+}
+
+static int nsp_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
+{
+ struct nsp_gpio *chip = gpiochip_get_data(gc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ nsp_set_bit(chip, REG, NSP_GPIO_OUT_EN, gpio, false);
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ dev_dbg(chip->dev, "gpio:%u set input\n", gpio);
+ return 0;
+}
+
+static int nsp_gpio_direction_output(struct gpio_chip *gc, unsigned gpio,
+ int val)
+{
+ struct nsp_gpio *chip = gpiochip_get_data(gc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ nsp_set_bit(chip, REG, NSP_GPIO_OUT_EN, gpio, true);
+ nsp_set_bit(chip, REG, NSP_GPIO_DATA_OUT, gpio, !!(val));
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ dev_dbg(chip->dev, "gpio:%u set output, value:%d\n", gpio, val);
+ return 0;
+}
+
+static void nsp_gpio_set(struct gpio_chip *gc, unsigned gpio, int val)
+{
+ struct nsp_gpio *chip = gpiochip_get_data(gc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ nsp_set_bit(chip, REG, NSP_GPIO_DATA_OUT, gpio, !!(val));
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ dev_dbg(chip->dev, "gpio:%u set, value:%d\n", gpio, val);
+}
+
+static int nsp_gpio_get(struct gpio_chip *gc, unsigned gpio)
+{
+ struct nsp_gpio *chip = gpiochip_get_data(gc);
+
+ return !!(readl(chip->base + NSP_GPIO_DATA_IN) & BIT(gpio));
+}
+
+static int nsp_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+ struct nsp_gpio *chip = gpiochip_get_data(gc);
+
+ return irq_linear_revmap(chip->irq_domain, offset);
+}
+
+static int nsp_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ return 1;
+}
+
+/*
+ * Only one group: "gpio_grp", since this local pinctrl device only performs
+ * GPIO specific PINCONF configurations
+ */
+static const char *nsp_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ return "gpio_grp";
+}
+
+static const struct pinctrl_ops nsp_pctrl_ops = {
+ .get_groups_count = nsp_get_groups_count,
+ .get_group_name = nsp_get_group_name,
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+ .dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int nsp_gpio_set_slew(struct nsp_gpio *chip, unsigned gpio, u16 slew)
+{
+ if (slew)
+ nsp_set_bit(chip, IO_CTRL, NSP_GPIO_SLEW_RATE_EN, gpio, true);
+ else
+ nsp_set_bit(chip, IO_CTRL, NSP_GPIO_SLEW_RATE_EN, gpio, false);
+
+ return 0;
+}
+
+static int nsp_gpio_set_pull(struct nsp_gpio *chip, unsigned gpio,
+ bool pull_up, bool pull_down)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ nsp_set_bit(chip, IO_CTRL, NSP_PULL_DOWN_EN, gpio, pull_down);
+ nsp_set_bit(chip, IO_CTRL, NSP_PULL_UP_EN, gpio, pull_up);
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ dev_dbg(chip->dev, "gpio:%u set pullup:%d pulldown: %d\n",
+ gpio, pull_up, pull_down);
+ return 0;
+}
+
+static void nsp_gpio_get_pull(struct nsp_gpio *chip, unsigned gpio,
+ bool *pull_up, bool *pull_down)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ *pull_up = nsp_get_bit(chip, IO_CTRL, NSP_PULL_UP_EN, gpio);
+ *pull_down = nsp_get_bit(chip, IO_CTRL, NSP_PULL_DOWN_EN, gpio);
+ spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static int nsp_gpio_set_strength(struct nsp_gpio *chip, unsigned gpio,
+ u16 strength)
+{
+ u32 offset, shift, i;
+ u32 val;
+ unsigned long flags;
+
+ /* make sure drive strength is supported */
+ if (strength < 2 || strength > 16 || (strength % 2))
+ return -ENOTSUPP;
+
+ shift = gpio;
+ offset = NSP_GPIO_DRV_CTRL;
+ dev_dbg(chip->dev, "gpio:%u set drive strength:%d mA\n", gpio,
+ strength);
+ spin_lock_irqsave(&chip->lock, flags);
+ strength = (strength / 2) - 1;
+ for (i = GPIO_DRV_STRENGTH_BITS; i > 0; i--) {
+ val = readl(chip->io_ctrl + offset);
+ val &= ~BIT(shift);
+ val |= ((strength >> (i-1)) & 0x1) << shift;
+ writel(val, chip->io_ctrl + offset);
+ offset += 4;
+ }
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ return 0;
+}
+
+static int nsp_gpio_get_strength(struct nsp_gpio *chip, unsigned gpio,
+ u16 *strength)
+{
+ unsigned int offset, shift;
+ u32 val;
+ unsigned long flags;
+ int i;
+
+ offset = NSP_GPIO_DRV_CTRL;
+ shift = gpio;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ *strength = 0;
+ for (i = (GPIO_DRV_STRENGTH_BITS - 1); i >= 0; i--) {
+ val = readl(chip->io_ctrl + offset) & BIT(shift);
+ val >>= shift;
+ *strength += (val << i);
+ offset += 4;
+ }
+
+ /* convert to mA */
+ *strength = (*strength + 1) * 2;
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ return 0;
+}
+
+int nsp_pin_config_group_get(struct pinctrl_dev *pctldev, unsigned selector,
+ unsigned long *config)
+{
+ return 0;
+}
+
+int nsp_pin_config_group_set(struct pinctrl_dev *pctldev, unsigned selector,
+ unsigned long *configs, unsigned num_configs)
+{
+ return 0;
+}
+
+static int nsp_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned long *config)
+{
+ struct nsp_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
+ enum pin_config_param param = pinconf_to_config_param(*config);
+ unsigned int gpio;
+ u16 arg = 0;
+ bool pull_up, pull_down;
+ int ret;
+
+ gpio = nsp_pin_to_gpio(pin);
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ nsp_gpio_get_pull(chip, gpio, &pull_up, &pull_down);
+ if ((pull_up == false) && (pull_down == false))
+ return 0;
+ else
+ return -EINVAL;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ nsp_gpio_get_pull(chip, gpio, &pull_up, &pull_down);
+ if (pull_up)
+ return 0;
+ else
+ return -EINVAL;
+
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ nsp_gpio_get_pull(chip, gpio, &pull_up, &pull_down);
+ if (pull_down)
+ return 0;
+ else
+ return -EINVAL;
+
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ ret = nsp_gpio_get_strength(chip, gpio, &arg);
+ if (ret)
+ return ret;
+ *config = pinconf_to_config_packed(param, arg);
+ return 0;
+
+ default:
+ return -ENOTSUPP;
+ }
+}
+
+static int nsp_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned long *configs, unsigned num_configs)
+{
+ struct nsp_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
+ enum pin_config_param param;
+ u16 arg;
+ unsigned int i, gpio;
+ int ret = -ENOTSUPP;
+
+ gpio = nsp_pin_to_gpio(pin);
+ for (i = 0; i < num_configs; i++) {
+ param = pinconf_to_config_param(configs[i]);
+ arg = pinconf_to_config_argument(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ ret = nsp_gpio_set_pull(chip, gpio, false, false);
+ if (ret < 0)
+ goto out;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ ret = nsp_gpio_set_pull(chip, gpio, true, false);
+ if (ret < 0)
+ goto out;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ ret = nsp_gpio_set_pull(chip, gpio, false, true);
+ if (ret < 0)
+ goto out;
+ break;
+
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ ret = nsp_gpio_set_strength(chip, gpio, arg);
+ if (ret < 0)
+ goto out;
+ break;
+
+ case PIN_CONFIG_SLEW_RATE:
+ ret = nsp_gpio_set_slew(chip, gpio, arg);
+ if (ret < 0)
+ goto out;
+ break;
+
+ default:
+ dev_err(chip->dev, "invalid configuration\n");
+ return -ENOTSUPP;
+ }
+ }
+
+out:
+ return ret;
+}
+
+static const struct pinconf_ops nsp_pconf_ops = {
+ .is_generic = true,
+ .pin_config_get = nsp_pin_config_get,
+ .pin_config_set = nsp_pin_config_set,
+ .pin_config_group_get = nsp_pin_config_group_get,
+ .pin_config_group_set = nsp_pin_config_group_set,
+};
+
+/*
+ * NSP GPIO controller supports some PINCONF related configurations such as
+ * pull up, pull down, slew and drive strength, when the pin is configured
+ * to GPIO.
+ *
+ * Here a local pinctrl device is created with simple 1-to-1 pin mapping to the
+ * local GPIO pins
+ */
+static int nsp_gpio_register_pinconf(struct nsp_gpio *chip)
+{
+ struct pinctrl_desc *pctldesc = &chip->pctldesc;
+ struct pinctrl_pin_desc *pins;
+ struct gpio_chip *gc = &chip->gc;
+ int i;
+
+ pins = devm_kcalloc(chip->dev, gc->ngpio, sizeof(*pins), GFP_KERNEL);
+ if (!pins)
+ return -ENOMEM;
+ for (i = 0; i < gc->ngpio; i++) {
+ pins[i].number = i;
+ pins[i].name = devm_kasprintf(chip->dev, GFP_KERNEL,
+ "gpio-%d", i);
+ if (!pins[i].name)
+ return -ENOMEM;
+ }
+ pctldesc->name = dev_name(chip->dev);
+ pctldesc->pctlops = &nsp_pctrl_ops;
+ pctldesc->pins = pins;
+ pctldesc->npins = gc->ngpio;
+ pctldesc->confops = &nsp_pconf_ops;
+
+ chip->pctl = pinctrl_register(pctldesc, chip->dev, chip);
+ if (IS_ERR(chip->pctl)) {
+ dev_err(chip->dev, "unable to register pinctrl device\n");
+ return PTR_ERR(chip->pctl);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id nsp_gpio_of_match[] = {
+ {.compatible = "brcm,nsp-gpio-a",},
+ {}
+};
+
+static int nsp_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ struct nsp_gpio *chip;
+ struct gpio_chip *gc;
+ u32 val, count;
+ int irq, ret;
+
+ if (of_property_read_u32(pdev->dev.of_node, "ngpios", &val)) {
+ dev_err(&pdev->dev, "Missing ngpios OF property\n");
+ return -ENODEV;
+ }
+
+ chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->dev = dev;
+ platform_set_drvdata(pdev, chip);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ chip->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(chip->base)) {
+ dev_err(dev, "unable to map I/O memory\n");
+ return PTR_ERR(chip->base);
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ chip->io_ctrl = devm_ioremap_resource(dev, res);
+ if (IS_ERR(chip->io_ctrl)) {
+ dev_err(dev, "unable to map I/O memory\n");
+ return PTR_ERR(chip->io_ctrl);
+ }
+
+ spin_lock_init(&chip->lock);
+ gc = &chip->gc;
+ gc->base = -1;
+ gc->can_sleep = false;
+ gc->ngpio = val;
+ gc->label = dev_name(dev);
+ gc->parent = dev;
+ gc->of_node = dev->of_node;
+ gc->request = nsp_gpio_request;
+ gc->free = nsp_gpio_free;
+ gc->direction_input = nsp_gpio_direction_input;
+ gc->direction_output = nsp_gpio_direction_output;
+ gc->set = nsp_gpio_set;
+ gc->get = nsp_gpio_get;
+ gc->to_irq = nsp_gpio_to_irq;
+
+ /* optional GPIO interrupt support */
+ irq = platform_get_irq(pdev, 0);
+ if (irq > 0) {
+ /* Create irq domain so that each pin can be assigned an IRQ.*/
+ chip->irq_domain = irq_domain_add_linear(gc->of_node, gc->ngpio,
+ &irq_domain_simple_ops,
+ chip);
+ if (!chip->irq_domain) {
+ dev_err(&pdev->dev, "Couldn't allocate IRQ domain\n");
+ return -ENXIO;
+ }
+
+ /* Map each gpio to an IRQ and set the handler for gpiolib. */
+ for (count = 0; count < gc->ngpio; count++) {
+ int irq = irq_create_mapping(chip->irq_domain, count);
+
+ irq_set_chip_and_handler(irq, &nsp_gpio_irq_chip,
+ handle_simple_irq);
+ irq_set_chip_data(irq, chip);
+ }
+
+ /* Install ISR for this GPIO controller. */
+ ret = devm_request_irq(&pdev->dev, irq, nsp_gpio_irq_handler,
+ IRQF_SHARED, "gpio-a", chip);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to request IRQ%d: %d\n",
+ irq, ret);
+ goto err_rm_gpiochip;
+ }
+
+ val = readl(chip->base + NSP_CHIP_A_INT_MASK);
+ val = val | NSP_CHIP_A_GPIO_INT_BIT;
+ writel(val, (chip->base + NSP_CHIP_A_INT_MASK));
+ }
+
+ ret = gpiochip_add_data(gc, chip);
+ if (ret < 0) {
+ dev_err(dev, "unable to add GPIO chip\n");
+ return ret;
+ }
+
+ ret = nsp_gpio_register_pinconf(chip);
+ if (ret) {
+ dev_err(dev, "unable to register pinconf\n");
+ goto err_rm_gpiochip;
+ }
+
+ return 0;
+
+err_rm_gpiochip:
+ gpiochip_remove(gc);
+
+ return ret;
+}
+
+static struct platform_driver nsp_gpio_driver = {
+ .driver = {
+ .name = "nsp-gpio-a",
+ .of_match_table = nsp_gpio_of_match,
+ },
+ .probe = nsp_gpio_probe,
+};
+
+static int __init nsp_gpio_init(void)
+{
+ return platform_driver_probe(&nsp_gpio_driver, nsp_gpio_probe);
+}
+arch_initcall_sync(nsp_gpio_init);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-07 14:17:57 +0000