diff options
| author | Kartik Rajput <kkartik@nvidia.com> | 2025-11-18 17:06:15 +0300 |
|---|---|---|
| committer | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2026-01-14 10:02:19 +0300 |
| commit | b53232fd220ad5ecc29b1cb4d4e1355365bc5026 (patch) | |
| tree | 044881d2b1d55ec2c54ea975456bb8d732ec227b | |
| parent | f8f9c1f4d0c7a64600e2ca312dec824a0bc2f1da (diff) | |
| download | linux-b53232fd220ad5ecc29b1cb4d4e1355365bc5026.tar.xz | |
i2c: tegra: Do not configure DMA if not supported
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>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
| -rw-r--r-- | drivers/i2c/busses/i2c-tegra.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index e533460bccc3..bd26b232ffb3 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -449,6 +449,11 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev) if (IS_VI(i2c_dev)) return 0; + if (!of_property_present(i2c_dev->dev->of_node, "dmas")) { + dev_dbg(i2c_dev->dev, "DMA not available, falling back to PIO\n"); + 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"); |