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i2c: nomadik: fetch i2c-transfer-timeout-us property from devicetree
Allow overriding the default timeout value (200ms) from devicetree, using the generic i2c-transfer-timeout-us property. The i2c_adapter->timeout field is an unaccurate jiffies amount; i2c-nomadik uses hrtimers for timeouts below one jiffy. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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@ -975,6 +975,8 @@ static const struct i2c_algorithm nmk_i2c_algo = {
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static void nmk_i2c_of_probe(struct device_node *np,
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struct nmk_i2c_dev *priv)
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{
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u32 timeout_usecs;
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/* Default to 100 kHz if no frequency is given in the node */
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if (of_property_read_u32(np, "clock-frequency", &priv->clk_freq))
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priv->clk_freq = I2C_MAX_STANDARD_MODE_FREQ;
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@ -986,7 +988,12 @@ static void nmk_i2c_of_probe(struct device_node *np,
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priv->sm = I2C_FREQ_MODE_FAST;
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priv->tft = 1; /* Tx FIFO threshold */
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priv->rft = 8; /* Rx FIFO threshold */
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priv->timeout_usecs = 200 * USEC_PER_MSEC; /* Slave response timeout */
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/* Slave response timeout */
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if (!of_property_read_u32(np, "i2c-transfer-timeout-us", &timeout_usecs))
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priv->timeout_usecs = timeout_usecs;
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else
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priv->timeout_usecs = 200 * USEC_PER_MSEC;
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}
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static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id)
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