leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

at24: enable ACPI device found on Galileo Gen2

Browse Source 
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>
This commit is contained in:
Andy Shevchenko 2015-10-23 12:16:44 +03:00 committed by Wolfram Sang
parent 6ebe21c1cf
commit 3861841d22
1 changed files with 19 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/misc/eeprom/at24.c
View File

@ -21,6 +21,7 @@
#include <linux/bitops.h> #include <linux/bitops.h>
#include <linux/jiffies.h> #include <linux/jiffies.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/acpi.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/platform_data/at24.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); 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) static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
{ {
struct at24_platform_data chip; struct at24_platform_data chip;
kernel_ulong_t magic = 0;
bool writable; bool writable;
int use_smbus = 0; int use_smbus = 0;
int use_smbus_write = 0; int use_smbus_write = 0;
struct at24_data *at24; struct at24_data *at24;
int err; int err;
unsigned i, num_addresses; unsigned i, num_addresses;
kernel_ulong_t magic;
if (client->dev.platform_data) { if (client->dev.platform_data) {
chip = *(struct at24_platform_data *)client->dev.platform_data; chip = *(struct at24_platform_data *)client->dev.platform_data;
} else { } 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; return -ENODEV;
magic = id->driver_data;
chip.byte_len = BIT(magic & AT24_BITMASK(AT24_SIZE_BYTELEN)); chip.byte_len = BIT(magic & AT24_BITMASK(AT24_SIZE_BYTELEN));
magic >>= AT24_SIZE_BYTELEN; magic >>= AT24_SIZE_BYTELEN;
chip.flags = magic & AT24_BITMASK(AT24_SIZE_FLAGS); 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 = { static struct i2c_driver at24_driver = {
.driver = { .driver = {
.name = "at24", .name = "at24",
.acpi_match_table = ACPI_PTR(at24_acpi_ids),
}, },
.probe = at24_probe, .probe = at24_probe,
.remove = at24_remove, .remove = at24_remove,