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Subject[PATCH V3] i2c: mux: pca954x: Add ACPI support for pca954x
Date
From: Tin Huynh <tnhuynh@apm.com>

This patch enables ACPI support for mux-pca954x driver.

Signed-off-by: Tin Huynh <tnhuynh@apm.com>

---
drivers/i2c/muxes/i2c-mux-pca954x.c | 25 ++++++++++++++++++++++++-
1 files changed, 24 insertions(+), 1 deletions(-)

Change from V2:
-Remove CONFIG_ACPI.

Change from V1:
-Don't shadow id variable.
-Include sorted header.
-Redefine acpi_device_id.
-Add CONFIG_ACPI.

diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mux-pca954x.c
index 1091346..f80191e 100644
--- a/drivers/i2c/muxes/i2c-mux-pca954x.c
+++ b/drivers/i2c/muxes/i2c-mux-pca954x.c
@@ -35,6 +35,7 @@
* warranty of any kind, whether express or implied.
*/

+#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
@@ -120,6 +121,19 @@ struct pca954x {
};
MODULE_DEVICE_TABLE(i2c, pca954x_id);

+static const struct acpi_device_id pca954x_acpi_ids[] = {
+ { .id = "PCA9540", .driver_data = pca_9540 },
+ { .id = "PCA9542", .driver_data = pca_9540 },
+ { .id = "PCA9543", .driver_data = pca_9543 },
+ { .id = "PCA9544", .driver_data = pca_9544 },
+ { .id = "PCA9545", .driver_data = pca_9545 },
+ { .id = "PCA9546", .driver_data = pca_9545 },
+ { .id = "PCA9547", .driver_data = pca_9547 },
+ { .id = "PCA9548", .driver_data = pca_9548 },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, pca954x_acpi_ids);
+
#ifdef CONFIG_OF
static const struct of_device_id pca954x_of_match[] = {
{ .compatible = "nxp,pca9540", .data = &chips[pca_9540] },
@@ -245,8 +259,16 @@ static int pca954x_probe(struct i2c_client *client,
match = of_match_device(of_match_ptr(pca954x_of_match), &client->dev);
if (match)
data->chip = of_device_get_match_data(&client->dev);
- else
+ else if (id)
data->chip = &chips[id->driver_data];
+ else {
+ const struct acpi_device_id *acpi_id;
+
+ acpi_id = acpi_match_device(pca954x_acpi_ids, &client->dev);
+ if (!acpi_id)
+ return -ENODEV;
+ data->chip = &chips[acpi_id->driver_data];
+ }

data->last_chan = 0; /* force the first selection */

@@ -321,6 +343,7 @@ static int pca954x_resume(struct device *dev)
.name = "pca954x",
.pm = &pca954x_pm,
.of_match_table = of_match_ptr(pca954x_of_match),
+ .acpi_match_table = ACPI_PTR(pca954x_acpi_ids),
},
.probe = pca954x_probe,
.remove = pca954x_remove,
--
1.7.1
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