From: Akhil R <akhilrajeev@nvidia.com>
To: <christian.koenig@amd.com>, <devicetree@vger.kernel.org>,
<digetx@gmail.com>, <jonathanh@nvidia.com>,
<ldewangan@nvidia.com>, <linux-i2c@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
<robh+dt@kernel.org>, <sumit.semwal@linaro.org>,
<thierry.reding@gmail.com>, <wsa@kernel.org>
Cc: <akhilrajeev@nvidia.com>
Subject: [PATCH v2 1/3] i2c: tegra: Add GPCDMA support
Date: Tue, 6 Sep 2022 20:17:14 +0530 [thread overview]
Message-ID: <20220906144716.16274-2-akhilrajeev@nvidia.com> (raw)
In-Reply-To: <20220906144716.16274-1-akhilrajeev@nvidia.com>
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 <akhilrajeev@nvidia.com>
---
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;
}
--
2.17.1
next prev parent reply other threads:[~2022-09-06 15:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-06 14:47 [PATCH v2 0/3] Add GPCDMA support to Tegra I2C Akhil R
2022-09-06 14:47 ` Akhil R [this message]
2022-09-10 9:03 ` [PATCH v2 1/3] i2c: tegra: Add GPCDMA support Dmitry Osipenko
2022-09-16 19:47 ` Wolfram Sang
2022-09-06 14:47 ` [PATCH v2 2/3] arm64: tegra: Add GPCDMA support for Tegra I2C Akhil R
2022-10-07 13:20 ` Thierry Reding
2022-10-07 14:34 ` Thierry Reding
2022-10-07 14:53 ` Robin Murphy
2022-10-07 15:17 ` Thierry Reding
2022-10-07 17:40 ` Robin Murphy
2022-09-06 14:47 ` [PATCH v2 3/3] arm64: defconfig: Make TEGRA186_GPC_DMA built-in Akhil R
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