Hi Tin, On 12/02/2016 05:39 AM, Tin Huynh wrote:
This patch enables ACPI support for leds-pca955x driver.Signed-off-by: Tin Huynh <tnhu...@apm.com> --- drivers/leds/leds-pca955x.c | 24 ++++++++++++++++++++++-- 1 files changed, 22 insertions(+), 2 deletions(-) Change from V4: -Using client->name instead of id->name to avoid NULL pointer in ACPI. Change from V3: -Drop ".id =" and ".driver_data =" from pca955x_acpi_ids initializers. Change from V2: -Correct coding conventions. Change from V1: -Remove CONFIG_ACPI. diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c index 840401a..78a7ce8 100644 --- a/drivers/leds/leds-pca955x.c +++ b/drivers/leds/leds-pca955x.c @@ -40,6 +40,7 @@ * bits the chip supports. */ +#include <linux/acpi.h> #include <linux/module.h> #include <linux/delay.h> #include <linux/string.h> @@ -100,6 +101,15 @@ struct pca955x_chipdef { }; MODULE_DEVICE_TABLE(i2c, pca955x_id); +static const struct acpi_device_id pca955x_acpi_ids[] = { + { "PCA9550", pca9550 }, + { "PCA9551", pca9551 }, + { "PCA9552", pca9552 }, + { "PCA9553", pca9553 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, pca955x_acpi_ids); + struct pca955x { struct mutex lock; struct pca955x_led *leds; @@ -250,7 +260,16 @@ static int pca955x_probe(struct i2c_client *client, struct led_platform_data *pdata; int i, err; - chip = &pca955x_chipdefs[id->driver_data]; + if (id) { + chip = &pca955x_chipdefs[id->driver_data]; + } else { + const struct acpi_device_id *acpi_id; + + acpi_id = acpi_match_device(pca955x_acpi_ids, &client->dev); + if (!acpi_id) + return -ENODEV; + chip = &pca955x_chipdefs[acpi_id->driver_data]; + } adapter = to_i2c_adapter(client->dev.parent); pdata = dev_get_platdata(&client->dev); @@ -264,7 +283,7 @@ static int pca955x_probe(struct i2c_client *client, dev_info(&client->dev, "leds-pca955x: Using %s %d-bit LED driver at " "slave address 0x%02x\n", - id->name, chip->bits, client->addr); + client->name, chip->bits, client->addr); if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) return -EIO; @@ -358,6 +377,7 @@ static int pca955x_remove(struct i2c_client *client) static struct i2c_driver pca955x_driver = { .driver = { .name = "leds-pca955x", + .acpi_match_table = ACPI_PTR(pca955x_acpi_ids), }, .probe = pca955x_probe, .remove = pca955x_remove,
Thanks for the quick reaction. Replaced v4 with v5 on the for-next branch. -- Best regards, Jacek Anaszewski
