Commit caf28080 authored by Wolfram Sang's avatar Wolfram Sang
Browse files

i2c: jz4780: really prevent potential division by zero



Make sure we avoid a division-by-zero OOPS in case clock-frequency is
set too low in DT. Add missing '\n' while we are here.
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
Acked-by: default avatarAxel Lin <axel.lin@ingics.com>
parent 4ececb7d
...@@ -771,11 +771,16 @@ static int jz4780_i2c_probe(struct platform_device *pdev) ...@@ -771,11 +771,16 @@ static int jz4780_i2c_probe(struct platform_device *pdev)
ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency", ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency",
&clk_freq); &clk_freq);
if (ret) { if (ret) {
dev_err(&pdev->dev, "clock-frequency not specified in DT"); dev_err(&pdev->dev, "clock-frequency not specified in DT\n");
goto err; goto err;
} }
i2c->speed = clk_freq / 1000; i2c->speed = clk_freq / 1000;
if (i2c->speed == 0) {
ret = -EINVAL;
dev_err(&pdev->dev, "clock-frequency minimum is 1000\n");
goto err;
}
jz4780_i2c_set_speed(i2c); jz4780_i2c_set_speed(i2c);
dev_info(&pdev->dev, "Bus frequency is %d KHz\n", i2c->speed); dev_info(&pdev->dev, "Bus frequency is %d KHz\n", i2c->speed);
......
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