From: Andy Shevchenko <andriy.shevche...@linux.intel.com>
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.shevche...@linux.intel.com>
Upstream-status: Submitted
Signed-off-by: Saul Wold <s...@linux.intel.com>
---
drivers/misc/eeprom/at24.c | 22 +++++++++++++++++++---
1 file changed, 19 insertions(+), 3 deletions(-)
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 2d3db81..2b01377 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);
+
/*-------------------------------------------------------------------------*/
/*
@@ -501,15 +508,23 @@ static int at24_probe(struct i2c_client *client, const
struct i2c_device_id *id)
struct at24_data *at24;
int err;
unsigned i, num_addresses;
- kernel_ulong_t magic;
+ kernel_ulong_t magic = 0;
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 *id;
+
+ id = acpi_match_device(at24_acpi_ids, &client->dev);
+ if (id)
+ magic = id->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);
@@ -690,6 +705,7 @@ static struct i2c_driver at24_driver = {
.driver = {
.name = "at24",
.owner = THIS_MODULE,
+ .acpi_match_table = ACPI_PTR(at24_acpi_ids),
},
.probe = at24_probe,
.remove = at24_remove,
--
2.5.0
--
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