diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2015-10-23 12:16:44 +0300 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2015-10-26 15:25:56 +0100 |
| commit | 40d8edc9bf056ea83e50152a4ccd33048d26ccde (patch) | |
| tree | 4e8a99c84a4e3b024d389ce7832afc5ed418e062 /drivers/misc | |
| parent | 918fe70cf4750e21350a8a40b28117b9e2991a10 (diff) | |
| download | linux-40d8edc9bf056ea83e50152a4ccd33048d26ccde.tar.bz2 | |
at24: enable ACPI device found on Galileo Gen2
There is a 24c08 chip connected to i2c bus on Intel Galileo Gen2 board. Enable
it via ACPI ID INT3499.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/eeprom/at24.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index c6cb7f8f325e..5d7c0900fa1b 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -21,6 +21,7 @@ #include <linux/bitops.h> #include <linux/jiffies.h> #include <linux/of.h> +#include <linux/acpi.h> #include <linux/i2c.h> #include <linux/platform_data/at24.h> @@ -131,6 +132,12 @@ static const struct i2c_device_id at24_ids[] = { }; MODULE_DEVICE_TABLE(i2c, at24_ids); +static const struct acpi_device_id at24_acpi_ids[] = { + { "INT3499", AT24_DEVICE_MAGIC(8192 / 8, 0) }, + { } +}; +MODULE_DEVICE_TABLE(acpi, at24_acpi_ids); + /*-------------------------------------------------------------------------*/ /* @@ -467,21 +474,29 @@ static void at24_get_ofdata(struct i2c_client *client, static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct at24_platform_data chip; + kernel_ulong_t magic = 0; bool writable; int use_smbus = 0; int use_smbus_write = 0; struct at24_data *at24; int err; unsigned i, num_addresses; - kernel_ulong_t magic; if (client->dev.platform_data) { chip = *(struct at24_platform_data *)client->dev.platform_data; } else { - if (!id->driver_data) + if (id) { + magic = id->driver_data; + } else { + const struct acpi_device_id *aid; + + aid = acpi_match_device(at24_acpi_ids, &client->dev); + if (aid) + magic = aid->driver_data; + } + if (!magic) return -ENODEV; - magic = id->driver_data; chip.byte_len = BIT(magic & AT24_BITMASK(AT24_SIZE_BYTELEN)); magic >>= AT24_SIZE_BYTELEN; chip.flags = magic & AT24_BITMASK(AT24_SIZE_FLAGS); @@ -661,6 +676,7 @@ static int at24_remove(struct i2c_client *client) static struct i2c_driver at24_driver = { .driver = { .name = "at24", + .acpi_match_table = ACPI_PTR(at24_acpi_ids), }, .probe = at24_probe, .remove = at24_remove, |