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i2c: meson: use i2c core for DT clock-frequency parsing

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We don't have to parse the DT manually to retrieve the bus frequency
and we don't have to maintain an own default for the bus frequency.
Let the i2c core do this for us.

Signed-off-by: Heiner Kallweit <[email protected]>
Reviewed-by: Jerome Brunet <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>
This commit is contained in:
Heiner Kallweit 2017-03-25 14:06:35 +01:00 • committed by Wolfram Sang
commit 39b2ca6853
2 changed files with 5 additions and 5 deletions
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8
drivers/i2c/busses/i2c-meson.c
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@ -38,7 +38,6 @@
#define REG_CTRL_CLKDIV_MASK ((BIT(10) - 1) << REG_CTRL_CLKDIV_SHIFT)
#define I2C_TIMEOUT_MS 500
#define DEFAULT_FREQ 100000
enum {
TOKEN_END = 0,
@ -387,15 +386,14 @@ static int meson_i2c_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct meson_i2c *i2c;
struct resource *mem;
u32 freq;
struct i2c_timings timings;
int irq, ret = 0;
i2c = devm_kzalloc(&pdev->dev, sizeof(struct meson_i2c), GFP_KERNEL);
if (!i2c)
return -ENOMEM;
if (of_property_read_u32(pdev->dev.of_node, "clock-frequency", &freq))
freq = DEFAULT_FREQ;
i2c_parse_fw_timings(&pdev->dev, &timings, true);
i2c->dev = &pdev->dev;
platform_set_drvdata(pdev, i2c);
@ -452,7 +450,7 @@ static int meson_i2c_probe(struct platform_device *pdev)
return ret;
}
meson_i2c_set_clk_div(i2c, freq);
meson_i2c_set_clk_div(i2c, timings.bus_freq_hz);
return 0;
}