[PATCH 2/2] i2c: s3c2410: Get the i2c bus number from alias id
From: dianders@chromium.org (Doug Anderson)
Date: 2012-11-20 22:28:12
Also in:
linux-i2c, linux-samsung-soc, lkml
Subsystem:
arm/samsung s3c, s5p and exynos arm architectures, i2c subsystem, i2c subsystem host drivers, the rest · Maintainers:
Krzysztof Kozlowski, Andi Shyti, Linus Torvalds
From: Padmavathi Venna <redacted> 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 <redacted> Signed-off-by: Doug Anderson <dianders@chromium.org> --- 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",
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1.7.7.3