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| author | Théo Lebrun <theo.lebrun@bootlin.com> | 2024-03-06 18:59:27 +0100 |
|---|---|---|
| committer | Andi Shyti <andi.shyti@kernel.org> | 2024-03-12 11:50:44 +0100 |
| commit | ec189b9fb83cd1c869d45bfe3c9cb27b71093a16 (patch) | |
| tree | 117552002fc518b8386e08e6f4c5c0961eff4371 /drivers/i2c | |
| parent | c763072ab4533f0669b19c60d8a18b31f2877164 (diff) | |
| download | linux-ec189b9fb83cd1c869d45bfe3c9cb27b71093a16.tar.gz linux-ec189b9fb83cd1c869d45bfe3c9cb27b71093a16.tar.bz2 linux-ec189b9fb83cd1c869d45bfe3c9cb27b71093a16.zip | |
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>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-nomadik.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index 020beb8ffa17..2e738b18677e 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -975,6 +975,8 @@ static const struct i2c_algorithm nmk_i2c_algo = { static void nmk_i2c_of_probe(struct device_node *np, struct nmk_i2c_dev *priv) { + u32 timeout_usecs; + /* Default to 100 kHz if no frequency is given in the node */ if (of_property_read_u32(np, "clock-frequency", &priv->clk_freq)) priv->clk_freq = I2C_MAX_STANDARD_MODE_FREQ; @@ -986,7 +988,12 @@ static void nmk_i2c_of_probe(struct device_node *np, priv->sm = I2C_FREQ_MODE_FAST; priv->tft = 1; /* Tx FIFO threshold */ priv->rft = 8; /* Rx FIFO threshold */ - priv->timeout_usecs = 200 * USEC_PER_MSEC; /* Slave response timeout */ + + /* Slave response timeout */ + if (!of_property_read_u32(np, "i2c-transfer-timeout-us", &timeout_usecs)) + priv->timeout_usecs = timeout_usecs; + else + priv->timeout_usecs = 200 * USEC_PER_MSEC; } static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) |