From: Krishna Yarlagadda <kyarlagadda@nvidia.com>
To: <digetx@gmail.com>, <linux-i2c@vger.kernel.org>,
<thierry.reding@gmail.com>
Cc: <jonathanh@nvidia.com>, <linux-tegra@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <ldewangan@nvidia.com>,
<smohammed@nvidia.com>, <rgumasta@nvidia.com>,
Krishna Yarlagadda <kyarlagadda@nvidia.com>
Subject: [PATCH 6/7] i2c: tegra: DMA support for t186 and t194
Date: Thu, 23 Jul 2020 17:48:52 +0530 [thread overview]
Message-ID: <1595506733-10307-6-git-send-email-kyarlagadda@nvidia.com> (raw)
In-Reply-To: <1595506733-10307-1-git-send-email-kyarlagadda@nvidia.com>
Enable GPC DMA support for Tegra186 and Tegra194
Signed-off-by: Rajesh Gumasta <rgumasta@nvidia.com>
Signed-off-by: Krishna Yarlagadda <kyarlagadda@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
next prev parent reply other threads:[~2020-07-23 12:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-23 12:18 [PATCH 1/7] i2c: tegra: remove dead code Krishna Yarlagadda
2020-07-23 12:18 ` [PATCH 2/7] i2c: tegra: Fix setting of controller ID Krishna Yarlagadda
2020-07-23 12:18 ` [PATCH 3/7] i2c: tegra: add flag for register write buffering Krishna Yarlagadda
2020-07-23 13:17 ` Dmitry Osipenko
2020-07-23 12:18 ` [PATCH 4/7] i2c: tegra: add high speed mode support Krishna Yarlagadda
2020-07-23 13:27 ` Dmitry Osipenko
2020-07-25 11:26 ` Michał Mirosław
2020-07-23 12:18 ` [PATCH 5/7] i2c: tegra: enable second level clock gating Krishna Yarlagadda
2020-07-23 14:01 ` Dmitry Osipenko
2020-07-23 12:18 ` Krishna Yarlagadda [this message]
2020-07-23 13:16 ` [PATCH 6/7] i2c: tegra: DMA support for t186 and t194 Dmitry Osipenko
2020-07-23 13:38 ` Dmitry Osipenko
2020-07-23 12:18 ` [PATCH 7/7] i2c: tegra: dump I2C registers on timeout Krishna Yarlagadda
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