torvalds/linux
3
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-03-22 07:27:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

i2c: tegra: Do not configure DMA if not supported

Browse Source 
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>
This commit is contained in:
Kartik Rajput
2025-11-18 19:36:15 +05:30
committed by Wolfram Sang
parent f8f9c1f4d0
commit b53232fd22
1 changed files with 5 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/i2c/busses/i2c-tegra.c
View File

@@ -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");