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authorTin Huynh <tnhuynh@apm.com>2016-12-02 05:39:13 +0100
committerJacek Anaszewski <j.anaszewski@samsung.com>2016-12-02 09:31:50 +0100
commit44b3e31d540e917a4d2292b902ade63fa1748d9a (patch)
treeb5c9a00635483d9ebeaaf9bc95fc029857cc6695 /drivers/leds
parentleds: netxbig: fix module autoload for OF registration (diff)
downloadlinux-44b3e31d540e917a4d2292b902ade63fa1748d9a.tar.xz
linux-44b3e31d540e917a4d2292b902ade63fa1748d9a.zip
leds: pca955x: Add ACPI support
This patch enables ACPI support for leds-pca955x driver. Signed-off-by: Tin Huynh <tnhuynh@apm.com> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/leds-pca955x.c24
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index 840401ae9a4e..78a7ce816a47 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 @@ static const struct i2c_device_id pca955x_id[] = {
};
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,