[PATCH 6/7] i2c: tegra: DMA support for t186 and t194

[Krishna Yarlagadda]

Enable GPC DMA support for Tegra186 and Tegra194

Signed-off-by: Rajesh Gumasta <rguma...@nvidia.com>
Signed-off-by: Krishna Yarlagadda <kyarlaga...@nvidia.com>
---
 drivers/i2c/busses/i2c-tegra.c | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 8ab968e..77198fc 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -236,6 +236,7 @@ struct tegra_i2c_hw_feature {
        u32 setup_hold_time_hs_mode;
        bool has_interface_timing_reg;
        bool has_slcg_support;
+       bool has_gpc_dma;
 };
 
 /**
@@ -432,11 +433,18 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev 
*i2c_dev)
        dma_addr_t dma_phys;
        int err;
 
-       if (!i2c_dev->hw->has_apb_dma)
-               return 0;
-
-       if (!IS_ENABLED(CONFIG_TEGRA20_APB_DMA)) {
-               dev_dbg(i2c_dev->dev, "Support for APB DMA not enabled!\n");
+       if (i2c_dev->hw->has_gpc_dma) {
+               if (!IS_ENABLED(CONFIG_TEGRA_GPC_DMA)) {
+                       dev_dbg(i2c_dev->dev, "Support for GPC DMA not 
enabled!\n");
+                       return 0;
+               }
+       } else if (i2c_dev->hw->has_apb_dma) {
+               if (!IS_ENABLED(CONFIG_TEGRA20_APB_DMA)) {
+                       dev_dbg(i2c_dev->dev, "Support for APB DMA not 
enabled!\n");
+                       return 0;
+               }
+       } else {
+               dev_dbg(i2c_dev->dev, "DMA is not enabled!\n");
                return 0;
        }
 
@@ -1490,6 +1498,7 @@ static const struct tegra_i2c_hw_feature tegra20_i2c_hw = 
{
        .setup_hold_time_fast_fast_plus_mode = 0x0,
        .setup_hold_time_hs_mode = 0x0,
        .has_interface_timing_reg = false,
+       .has_gpc_dma = false,
 };
 
 static const struct tegra_i2c_hw_feature tegra30_i2c_hw = {
@@ -1519,6 +1528,7 @@ static const struct tegra_i2c_hw_feature tegra30_i2c_hw = 
{
        .setup_hold_time_fast_fast_plus_mode = 0x0,
        .setup_hold_time_hs_mode = 0x0,
        .has_interface_timing_reg = false,
+       .has_gpc_dma = false,
 };
 
 static const struct tegra_i2c_hw_feature tegra114_i2c_hw = {
@@ -1548,6 +1558,7 @@ static const struct tegra_i2c_hw_feature tegra114_i2c_hw 
= {
        .setup_hold_time_fast_fast_plus_mode = 0x0,
        .setup_hold_time_hs_mode = 0x0,
        .has_interface_timing_reg = false,
+       .has_gpc_dma = false,
 };
 
 static const struct tegra_i2c_hw_feature tegra124_i2c_hw = {
@@ -1577,6 +1588,7 @@ static const struct tegra_i2c_hw_feature tegra124_i2c_hw 
= {
        .setup_hold_time_fast_fast_plus_mode = 0x0,
        .setup_hold_time_hs_mode = 0x0,
        .has_interface_timing_reg = true,
+       .has_gpc_dma = false,
 };
 
 static const struct tegra_i2c_hw_feature tegra210_i2c_hw = {
@@ -1606,6 +1618,7 @@ static const struct tegra_i2c_hw_feature tegra210_i2c_hw 
= {
        .setup_hold_time_fast_fast_plus_mode = 0,
        .setup_hold_time_hs_mode = 0,
        .has_interface_timing_reg = true,
+       .has_gpc_dma = true,
 };
 
 static const struct tegra_i2c_hw_feature tegra186_i2c_hw = {
@@ -1635,6 +1648,7 @@ static const struct tegra_i2c_hw_feature tegra186_i2c_hw 
= {
        .setup_hold_time_fast_fast_plus_mode = 0,
        .setup_hold_time_hs_mode = 0,
        .has_interface_timing_reg = true,
+       .has_gpc_dma = true,
 };
 
 static const struct tegra_i2c_hw_feature tegra194_i2c_hw = {
@@ -1664,6 +1678,7 @@ static const struct tegra_i2c_hw_feature tegra194_i2c_hw 
= {
        .setup_hold_time_fast_fast_plus_mode = 0x02020202,
        .setup_hold_time_hs_mode = 0x090909,
        .has_interface_timing_reg = true,
+       .has_gpc_dma = true,
 };
 
 /* Match table for of_platform binding */
-- 
2.7.4