[PATCH 2/2] i2c-mv64xxx: Abort the mv64xxx_of_config if clock-frequency is not provided

From: Gregory CLEMENT
Date: Fri Jun 07 2013 - 11:49:34 EST

From: Zbigniew Bodek <zbb@xxxxxxxxxxxx>

This commit adds checking whether clock-frequency property acquisition
has succeeded. Do not waste time to find baud factors if there is no
information about the desired bus frequency in dts.

[gregory.clement@xxxxxxxxxxxxxxxxxx: Reword the commit log]

Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Zbigniew Bodek <zbb@xxxxxxxxxxxx>
drivers/i2c/busses/i2c-mv64xxx.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c
index 60cac9f..88c2dd0 100644
--- a/drivers/i2c/busses/i2c-mv64xxx.c
+++ b/drivers/i2c/busses/i2c-mv64xxx.c
@@ -593,7 +593,9 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
goto out;
tclk = clk_get_rate(drv_data->clk);
- of_property_read_u32(np, "clock-frequency", &bus_freq);
+ if ((rc = of_property_read_u32(np, "clock-frequency", &bus_freq)) != 0)
+ goto out;
if (!mv64xxx_find_baud_factors(bus_freq, tclk,
&drv_data->freq_n, &drv_data->freq_m)) {
rc = -EINVAL;

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