From: Andy Shevchenko <andriy.shevche...@linux.intel.com>
commit 99e17e265a9df3b2ef8fbc1a568cbb2b05a1b977 upstream.
This patch adds a support of the expandes found on Intel Galileo Gen2 board.
The platform information comes from ACPI.
Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
(cherry picked from commit f32517bf1ae0a2de72b3f27200233bd3ad65bfeb)
---
drivers/gpio/gpio-pca953x.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 56f679b..32a56d5 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
@@ -75,6 +76,12 @@ static const struct i2c_device_id pca953x_id[] = {
};
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
@@ -668,7 +675,18 @@ static int pca953x_probe(struct i2c_client *client,
chip->client = client;
- chip->driver_data = id->driver_data;
+ 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);
@@ -761,6 +779,7 @@ 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,
--
2.5.0
--
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