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path: root/drivers/gpio/gpio-pca953x.c
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Diffstat (limited to 'drivers/gpio/gpio-pca953x.c')
-rw-r--r--drivers/gpio/gpio-pca953x.c45
1 files changed, 36 insertions, 9 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 50caeb1ee..2d4892cc7 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -21,6 +21,7 @@
#ifdef CONFIG_OF_GPIO
#include <linux/of_platform.h>
#endif
+#include <linux/acpi.h>
#define PCA953X_INPUT 0
#define PCA953X_OUTPUT 1
@@ -42,6 +43,9 @@
#define PCA_INT 0x0100
#define PCA953X_TYPE 0x1000
#define PCA957X_TYPE 0x2000
+#define PCA_TYPE_MASK 0xF000
+
+#define PCA_CHIP_TYPE(x) ((x) & PCA_TYPE_MASK)
static const struct i2c_device_id pca953x_id[] = {
{ "pca9505", 40 | PCA953X_TYPE | PCA_INT, },
@@ -67,11 +71,18 @@ static const struct i2c_device_id pca953x_id[] = {
{ "tca6408", 8 | PCA953X_TYPE | PCA_INT, },
{ "tca6416", 16 | PCA953X_TYPE | PCA_INT, },
{ "tca6424", 24 | PCA953X_TYPE | PCA_INT, },
+ { "tca9539", 16 | PCA953X_TYPE | PCA_INT, },
{ "xra1202", 8 | PCA953X_TYPE },
{ }
};
MODULE_DEVICE_TABLE(i2c, pca953x_id);
+static const struct acpi_device_id pca953x_acpi_ids[] = {
+ { "INT3491", 16 | PCA953X_TYPE | PCA_INT, },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, pca953x_acpi_ids);
+
#define MAX_BANK 5
#define BANK_SZ 8
@@ -95,6 +106,7 @@ struct pca953x_chip {
struct gpio_chip gpio_chip;
const char *const *names;
int chip_type;
+ unsigned long driver_data;
};
static inline struct pca953x_chip *to_pca(struct gpio_chip *gc)
@@ -517,14 +529,13 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid)
}
static int pca953x_irq_setup(struct pca953x_chip *chip,
- const struct i2c_device_id *id,
int irq_base)
{
struct i2c_client *client = chip->client;
int ret, i, offset = 0;
if (client->irq && irq_base != -1
- && (id->driver_data & PCA_INT)) {
+ && (chip->driver_data & PCA_INT)) {
switch (chip->chip_type) {
case PCA953X_TYPE:
@@ -581,12 +592,11 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
#else /* CONFIG_GPIO_PCA953X_IRQ */
static int pca953x_irq_setup(struct pca953x_chip *chip,
- const struct i2c_device_id *id,
int irq_base)
{
struct i2c_client *client = chip->client;
- if (irq_base != -1 && (id->driver_data & PCA_INT))
+ if (irq_base != -1 && (chip->driver_data & PCA_INT))
dev_warn(&client->dev, "interrupt support not compiled in\n");
return 0;
@@ -635,11 +645,15 @@ static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
memset(val, 0xFF, NBANK(chip));
else
memset(val, 0, NBANK(chip));
- pca953x_write_regs(chip, PCA957X_INVRT, val);
+ ret = pca953x_write_regs(chip, PCA957X_INVRT, val);
+ if (ret)
+ goto out;
/* To enable register 6, 7 to control pull up and pull down */
memset(val, 0x02, NBANK(chip));
- pca953x_write_regs(chip, PCA957X_BKEN, val);
+ ret = pca953x_write_regs(chip, PCA957X_BKEN, val);
+ if (ret)
+ goto out;
return 0;
out:
@@ -673,14 +687,26 @@ static int pca953x_probe(struct i2c_client *client,
chip->client = client;
- chip->chip_type = id->driver_data & (PCA953X_TYPE | PCA957X_TYPE);
+ if (id) {
+ chip->driver_data = id->driver_data;
+ } else {
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(pca953x_acpi_ids, &client->dev);
+ if (!id)
+ return -ENODEV;
+
+ chip->driver_data = id->driver_data;
+ }
+
+ chip->chip_type = PCA_CHIP_TYPE(chip->driver_data);
mutex_init(&chip->i2c_lock);
/* initialize cached registers from their original values.
* we can't share this chip with another i2c master.
*/
- pca953x_setup_gpio(chip, id->driver_data & PCA_GPIO_MASK);
+ pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
if (chip->chip_type == PCA953X_TYPE)
ret = device_pca953x_init(chip, invert);
@@ -693,7 +719,7 @@ static int pca953x_probe(struct i2c_client *client,
if (ret)
return ret;
- ret = pca953x_irq_setup(chip, id, irq_base);
+ ret = pca953x_irq_setup(chip, irq_base);
if (ret)
return ret;
@@ -765,6 +791,7 @@ static struct i2c_driver pca953x_driver = {
.driver = {
.name = "pca953x",
.of_match_table = pca953x_dt_ids,
+ .acpi_match_table = ACPI_PTR(pca953x_acpi_ids),
},
.probe = pca953x_probe,
.remove = pca953x_remove,