From: Padmavathi Venna <padma.v@xxxxxxxxxxx>
Get the i2c bus number that the device is connected to using the alias
id. This makes debugging / grokking of kernel messages much easier.
[dianders: slight patch cleanup from Padmavathi's original.]
Signed-off-by: Padmavathi Venna <padma.v@xxxxxxxxxxx>
Signed-off-by: Doug Anderson <dianders@xxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-s3c2410.c | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 3e0335f..ca43590 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -899,11 +899,19 @@ static void
s3c24xx_i2c_parse_dt(struct device_node *np, struct s3c24xx_i2c *i2c)
{
struct s3c2410_platform_i2c *pdata = i2c->pdata;
+ int id;
if (!np)
return;
- pdata->bus_num = -1; /* i2c bus number is dynamically assigned */
+ id = of_alias_get_id(np, "i2c");
+ if (id < 0) {
+ dev_warn(i2c->dev, "failed to get alias id:%d\n", id);
+ pdata->bus_num = -1;
+ } else {
+ /* i2c bus number is statically assigned from alias */
+ pdata->bus_num = id;
+ }
of_property_read_u32(np, "samsung,i2c-sda-delay", &pdata->sda_delay);
of_property_read_u32(np, "samsung,i2c-slave-addr", &pdata->slave_addr);
of_property_read_u32(np, "samsung,i2c-max-bus-freq",
--
1.7.7.3
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