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

[Gregory CLEMENT <gregory.clement-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>]

From: Zbigniew Bodek <zbb-nYOzD4b6Jr9Wk0Htik3J/w@public.gmane.org>

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-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org: Reword the commit log]

Signed-off-by: Gregory CLEMENT <gregory.clement-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Signed-off-by: Zbigniew Bodek <zbb-nYOzD4b6Jr9Wk0Htik3J/w@public.gmane.org>
---
 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;
-- 
1.8.1.2