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-rw-r--r--drivers/clk/nxp/Makefile1
-rw-r--r--drivers/clk/nxp/clk-lpc18xx-ccu.c2
-rw-r--r--drivers/clk/nxp/clk-lpc18xx-cgu.c2
-rw-r--r--drivers/clk/nxp/clk-lpc18xx-creg.c226
-rw-r--r--drivers/clk/nxp/clk-lpc32xx.c15
5 files changed, 235 insertions, 11 deletions
diff --git a/drivers/clk/nxp/Makefile b/drivers/clk/nxp/Makefile
index 607bd48c6..d456ee6cc 100644
--- a/drivers/clk/nxp/Makefile
+++ b/drivers/clk/nxp/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_ARCH_LPC18XX) += clk-lpc18xx-cgu.o
obj-$(CONFIG_ARCH_LPC18XX) += clk-lpc18xx-ccu.o
+obj-$(CONFIG_ARCH_LPC18XX) += clk-lpc18xx-creg.o
obj-$(CONFIG_ARCH_LPC32XX) += clk-lpc32xx.o
diff --git a/drivers/clk/nxp/clk-lpc18xx-ccu.c b/drivers/clk/nxp/clk-lpc18xx-ccu.c
index 558da8955..f7136b94f 100644
--- a/drivers/clk/nxp/clk-lpc18xx-ccu.c
+++ b/drivers/clk/nxp/clk-lpc18xx-ccu.c
@@ -28,8 +28,6 @@
#define CCU_BRANCH_IS_BUS BIT(0)
#define CCU_BRANCH_HAVE_DIV2 BIT(1)
-#define to_clk_gate(_hw) container_of(_hw, struct clk_gate, hw)
-
struct lpc18xx_branch_clk_data {
const char **name;
int num;
diff --git a/drivers/clk/nxp/clk-lpc18xx-cgu.c b/drivers/clk/nxp/clk-lpc18xx-cgu.c
index c924572fc..2531174b3 100644
--- a/drivers/clk/nxp/clk-lpc18xx-cgu.c
+++ b/drivers/clk/nxp/clk-lpc18xx-cgu.c
@@ -605,7 +605,7 @@ static void __init lpc18xx_cgu_register_source_clks(struct device_node *np,
/* Register the internal 12 MHz RC oscillator (IRC) */
clk = clk_register_fixed_rate(NULL, clk_src_names[CLK_SRC_IRC],
- NULL, CLK_IS_ROOT, 12000000);
+ NULL, 0, 12000000);
if (IS_ERR(clk))
pr_warn("%s: failed to register irc clk\n", __func__);
diff --git a/drivers/clk/nxp/clk-lpc18xx-creg.c b/drivers/clk/nxp/clk-lpc18xx-creg.c
new file mode 100644
index 000000000..d44b61afa
--- /dev/null
+++ b/drivers/clk/nxp/clk-lpc18xx-creg.c
@@ -0,0 +1,226 @@
+/*
+ * Clk driver for NXP LPC18xx/43xx Configuration Registers (CREG)
+ *
+ * Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define LPC18XX_CREG_CREG0 0x004
+#define LPC18XX_CREG_CREG0_EN1KHZ BIT(0)
+#define LPC18XX_CREG_CREG0_EN32KHZ BIT(1)
+#define LPC18XX_CREG_CREG0_RESET32KHZ BIT(2)
+#define LPC18XX_CREG_CREG0_PD32KHZ BIT(3)
+
+#define to_clk_creg(_hw) container_of(_hw, struct clk_creg_data, hw)
+
+enum {
+ CREG_CLK_1KHZ,
+ CREG_CLK_32KHZ,
+ CREG_CLK_MAX,
+};
+
+struct clk_creg_data {
+ struct clk_hw hw;
+ const char *name;
+ struct regmap *reg;
+ unsigned int en_mask;
+ const struct clk_ops *ops;
+};
+
+#define CREG_CLK(_name, _emask, _ops) \
+{ \
+ .name = _name, \
+ .en_mask = LPC18XX_CREG_CREG0_##_emask, \
+ .ops = &_ops, \
+}
+
+static int clk_creg_32k_prepare(struct clk_hw *hw)
+{
+ struct clk_creg_data *creg = to_clk_creg(hw);
+ int ret;
+
+ ret = regmap_update_bits(creg->reg, LPC18XX_CREG_CREG0,
+ LPC18XX_CREG_CREG0_PD32KHZ |
+ LPC18XX_CREG_CREG0_RESET32KHZ, 0);
+
+ /*
+ * Powering up the 32k oscillator takes a long while
+ * and sadly there aren't any status bit to poll.
+ */
+ msleep(2500);
+
+ return ret;
+}
+
+static void clk_creg_32k_unprepare(struct clk_hw *hw)
+{
+ struct clk_creg_data *creg = to_clk_creg(hw);
+
+ regmap_update_bits(creg->reg, LPC18XX_CREG_CREG0,
+ LPC18XX_CREG_CREG0_PD32KHZ,
+ LPC18XX_CREG_CREG0_PD32KHZ);
+}
+
+static int clk_creg_32k_is_prepared(struct clk_hw *hw)
+{
+ struct clk_creg_data *creg = to_clk_creg(hw);
+ u32 reg;
+
+ regmap_read(creg->reg, LPC18XX_CREG_CREG0, &reg);
+
+ return !(reg & LPC18XX_CREG_CREG0_PD32KHZ) &&
+ !(reg & LPC18XX_CREG_CREG0_RESET32KHZ);
+}
+
+static unsigned long clk_creg_1k_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ return parent_rate / 32;
+}
+
+static int clk_creg_enable(struct clk_hw *hw)
+{
+ struct clk_creg_data *creg = to_clk_creg(hw);
+
+ return regmap_update_bits(creg->reg, LPC18XX_CREG_CREG0,
+ creg->en_mask, creg->en_mask);
+}
+
+static void clk_creg_disable(struct clk_hw *hw)
+{
+ struct clk_creg_data *creg = to_clk_creg(hw);
+
+ regmap_update_bits(creg->reg, LPC18XX_CREG_CREG0,
+ creg->en_mask, 0);
+}
+
+static int clk_creg_is_enabled(struct clk_hw *hw)
+{
+ struct clk_creg_data *creg = to_clk_creg(hw);
+ u32 reg;
+
+ regmap_read(creg->reg, LPC18XX_CREG_CREG0, &reg);
+
+ return !!(reg & creg->en_mask);
+}
+
+static const struct clk_ops clk_creg_32k = {
+ .enable = clk_creg_enable,
+ .disable = clk_creg_disable,
+ .is_enabled = clk_creg_is_enabled,
+ .prepare = clk_creg_32k_prepare,
+ .unprepare = clk_creg_32k_unprepare,
+ .is_prepared = clk_creg_32k_is_prepared,
+};
+
+static const struct clk_ops clk_creg_1k = {
+ .enable = clk_creg_enable,
+ .disable = clk_creg_disable,
+ .is_enabled = clk_creg_is_enabled,
+ .recalc_rate = clk_creg_1k_recalc_rate,
+};
+
+static struct clk_creg_data clk_creg_clocks[] = {
+ [CREG_CLK_1KHZ] = CREG_CLK("1khz_clk", EN1KHZ, clk_creg_1k),
+ [CREG_CLK_32KHZ] = CREG_CLK("32khz_clk", EN32KHZ, clk_creg_32k),
+};
+
+static struct clk *clk_register_creg_clk(struct device *dev,
+ struct clk_creg_data *creg_clk,
+ const char **parent_name,
+ struct regmap *syscon)
+{
+ struct clk_init_data init;
+
+ init.ops = creg_clk->ops;
+ init.name = creg_clk->name;
+ init.parent_names = parent_name;
+ init.num_parents = 1;
+
+ creg_clk->reg = syscon;
+ creg_clk->hw.init = &init;
+
+ if (dev)
+ return devm_clk_register(dev, &creg_clk->hw);
+
+ return clk_register(NULL, &creg_clk->hw);
+}
+
+static struct clk *clk_creg_early[CREG_CLK_MAX];
+static struct clk_onecell_data clk_creg_early_data = {
+ .clks = clk_creg_early,
+ .clk_num = CREG_CLK_MAX,
+};
+
+static void __init lpc18xx_creg_clk_init(struct device_node *np)
+{
+ const char *clk_32khz_parent;
+ struct regmap *syscon;
+
+ syscon = syscon_node_to_regmap(np->parent);
+ if (IS_ERR(syscon)) {
+ pr_err("%s: syscon lookup failed\n", __func__);
+ return;
+ }
+
+ clk_32khz_parent = of_clk_get_parent_name(np, 0);
+
+ clk_creg_early[CREG_CLK_32KHZ] =
+ clk_register_creg_clk(NULL, &clk_creg_clocks[CREG_CLK_32KHZ],
+ &clk_32khz_parent, syscon);
+ clk_creg_early[CREG_CLK_1KHZ] = ERR_PTR(-EPROBE_DEFER);
+
+ of_clk_add_provider(np, of_clk_src_onecell_get, &clk_creg_early_data);
+}
+CLK_OF_DECLARE(lpc18xx_creg_clk, "nxp,lpc1850-creg-clk", lpc18xx_creg_clk_init);
+
+static struct clk *clk_creg[CREG_CLK_MAX];
+static struct clk_onecell_data clk_creg_data = {
+ .clks = clk_creg,
+ .clk_num = CREG_CLK_MAX,
+};
+
+static int lpc18xx_creg_clk_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct regmap *syscon;
+
+ syscon = syscon_node_to_regmap(np->parent);
+ if (IS_ERR(syscon)) {
+ dev_err(&pdev->dev, "syscon lookup failed\n");
+ return PTR_ERR(syscon);
+ }
+
+ clk_creg[CREG_CLK_32KHZ] = clk_creg_early[CREG_CLK_32KHZ];
+ clk_creg[CREG_CLK_1KHZ] =
+ clk_register_creg_clk(NULL, &clk_creg_clocks[CREG_CLK_1KHZ],
+ &clk_creg_clocks[CREG_CLK_32KHZ].name,
+ syscon);
+
+ return of_clk_add_provider(np, of_clk_src_onecell_get, &clk_creg_data);
+}
+
+static const struct of_device_id lpc18xx_creg_clk_of_match[] = {
+ { .compatible = "nxp,lpc1850-creg-clk" },
+ {},
+};
+
+static struct platform_driver lpc18xx_creg_clk_driver = {
+ .probe = lpc18xx_creg_clk_probe,
+ .driver = {
+ .name = "lpc18xx-creg-clk",
+ .of_match_table = lpc18xx_creg_clk_of_match,
+ },
+};
+builtin_platform_driver(lpc18xx_creg_clk_driver);
diff --git a/drivers/clk/nxp/clk-lpc32xx.c b/drivers/clk/nxp/clk-lpc32xx.c
index 10dd0fdaa..481b2646b 100644
--- a/drivers/clk/nxp/clk-lpc32xx.c
+++ b/drivers/clk/nxp/clk-lpc32xx.c
@@ -87,7 +87,7 @@ enum {
enum {
/* Start from the last defined clock in dt bindings */
- LPC32XX_CLK_ADC_DIV = LPC32XX_CLK_ADC + 1,
+ LPC32XX_CLK_ADC_DIV = LPC32XX_CLK_HCLK_PLL + 1,
LPC32XX_CLK_ADC_RTC,
LPC32XX_CLK_TEST1,
LPC32XX_CLK_TEST2,
@@ -96,7 +96,6 @@ enum {
LPC32XX_CLK_OSC,
LPC32XX_CLK_SYS,
LPC32XX_CLK_PLL397X,
- LPC32XX_CLK_HCLK_PLL,
LPC32XX_CLK_HCLK_DIV_PERIPH,
LPC32XX_CLK_HCLK_DIV,
LPC32XX_CLK_HCLK,
@@ -589,7 +588,8 @@ static long clk_hclk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
- u64 m_i, m, n, p, o = rate, i = *parent_rate, d = (u64)rate << 6;
+ u64 m_i, o = rate, i = *parent_rate, d = (u64)rate << 6;
+ u64 m = 0, n = 0, p = 0;
int p_i, n_i;
pr_debug("%s: %lu/%lu\n", clk_hw_get_name(hw), *parent_rate, rate);
@@ -1429,6 +1429,8 @@ static struct clk * __init lpc32xx_clk_register(u32 id)
hw = &clk_hw->hw0.div.hw;
else if (clk_hw->type == CLK_GATE)
hw = &clk_hw->hw0.gate.hw;
+ else
+ return ERR_PTR(-EINVAL);
hw->init = &clk_init;
clk = clk_register(NULL, hw);
@@ -1515,7 +1517,7 @@ static void __init lpc32xx_clk_init(struct device_node *np)
return;
}
- for (i = 0; i < LPC32XX_CLK_MAX; i++) {
+ for (i = 1; i < LPC32XX_CLK_MAX; i++) {
clk[i] = lpc32xx_clk_register(i);
if (IS_ERR(clk[i])) {
pr_err("failed to register %s clock: %ld\n",
@@ -1526,9 +1528,6 @@ static void __init lpc32xx_clk_init(struct device_node *np)
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
- /* For 13MHz osc valid output range of PLL is from 156MHz to 266.5MHz */
- clk_set_rate(clk[LPC32XX_CLK_HCLK_PLL], 208000000);
-
/* Set 48MHz rate of USB PLL clock */
clk_set_rate(clk[LPC32XX_CLK_USB_PLL], 48000000);
@@ -1555,7 +1554,7 @@ static void __init lpc32xx_usb_clk_init(struct device_node *np)
return;
}
- for (i = 0; i < LPC32XX_USB_CLK_MAX; i++) {
+ for (i = 1; i < LPC32XX_USB_CLK_MAX; i++) {
usb_clk[i] = lpc32xx_clk_register(i + LPC32XX_CLK_USB_OFFSET);
if (IS_ERR(usb_clk[i])) {
pr_err("failed to register %s clock: %ld\n",
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-19 02:00:37 +0000