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[v2,2/5] i2c: tegra: Do not configure DMA if not supported

Message ID 20250130143424.52389-3-kkartik@nvidia.com
State New
Headers show
Series Add I2C support for Tegra264 | expand

Commit Message

Kartik Rajput Jan. 30, 2025, 2:34 p.m. UTC 
On Tegra264, not all I2C controllers have the necessary interface to
GPC DMA, this causes failures when function tegra_i2c_init_dma()
is called.

Ensure that "dmas" device-tree property is present before initializing
DMA in function tegra_i2c_init_dma().

Signed-off-by: Kartik Rajput <kkartik@nvidia.com>
---
v1 -> v2:
	* Update commit message to clarify that some I2C controllers may
	  not have the necessary interface to GPC DMA.
---
 drivers/i2c/busses/i2c-tegra.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 87976e99e6d0..b0dd129714a2 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -442,6 +442,9 @@  static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev)
 	if (IS_VI(i2c_dev))
 		return 0;
 
+	if (!device_property_present(i2c_dev->dev, "dmas"))
+		return 0;
+
 	if (i2c_dev->hw->has_apb_dma) {
 		if (!IS_ENABLED(CONFIG_TEGRA20_APB_DMA)) {
 			dev_dbg(i2c_dev->dev, "APB DMA support not enabled\n");