From 48cb6356fae1259fee41b2fb441f669ee330b7c4 Mon Sep 17 00:00:00 2001 From: Akhil R Date: Tue, 6 Sep 2022 20:17:14 +0530 Subject: [PATCH] i2c: tegra: Add GPCDMA support Enable support for GPCDMA, which is used in I2C controllers in Tegra 186 and above. The chips before that used APB DMA. This change works under the presumption that all chips apart from those supporting APB DMA is using GPCDMA. Signed-off-by: Akhil R Reviewed-by: Dmitry Osipenko Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-tegra.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 031c78ac42e6..954022c04cc4 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -443,11 +443,16 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev) u32 *dma_buf; int err; - if (!i2c_dev->hw->has_apb_dma || i2c_dev->is_vi) + if (i2c_dev->is_vi) return 0; - if (!IS_ENABLED(CONFIG_TEGRA20_APB_DMA)) { - dev_dbg(i2c_dev->dev, "DMA support not enabled\n"); + 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"); + return 0; + } + } else if (!IS_ENABLED(CONFIG_TEGRA186_GPC_DMA)) { + dev_dbg(i2c_dev->dev, "GPC DMA support not enabled\n"); return 0; }