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i2c: core: Parse SDA hold time from firmware

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There are two drivers already using the SDA hold time setting.
It might be more in the future, thus, make I2C core to parse the setting
for us if provided by firmware.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Andy Shevchenko
2018-07-25 17:39:25 +03:00
committed by Wolfram Sang
parent 1c02cbf7de
commit 4717be73c2
2 changed files with 4 additions and 0 deletions
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2
drivers/i2c/i2c-core-base.c
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@@ -1576,6 +1576,8 @@ void i2c_parse_fw_timings(struct device *dev, struct i2c_timings *t, bool use_de
ret = device_property_read_u32(dev, "i2c-sda-falling-time-ns", &t->sda_fall_ns);
if (ret && use_defaults)
t->sda_fall_ns = t->scl_fall_ns;
device_property_read_u32(dev, "i2c-sda-hold-time-ns", &t->sda_hold_ns);
}
EXPORT_SYMBOL_GPL(i2c_parse_fw_timings);