[PATCH 09/13] i2c: nomadik: fetch timeout-usecs property from devicetree
From: Théo Lebrun <theo.lebrun@bootlin.com>
Date: 2024-02-15 16:52:41
Also in:
linux-devicetree, linux-i2c, linux-mips, lkml
Subsystem:
arm/nomadik/ux500 architectures, i2c subsystem, i2c subsystem host drivers, the rest · Maintainers:
Linus Walleij, Andi Shyti, Linus Torvalds
Allow overriding the default timeout value (200ms) from devicetree, using the timeout-usecs property. The i2c_adapter->timeout field is an unaccurate jiffies amount; i2c-nomadik uses hrtimers for timeouts below one jiffy. Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com> --- drivers/i2c/busses/i2c-nomadik.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index afd54999bbbb..23e12c570457 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c@@ -964,6 +964,8 @@ 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;
@@ -975,7 +977,12 @@ 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, "timeout-usecs", &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)
--
2.43.1
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