From: Nicolas Boichat <drinkcat@chromium.org>
To: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org,
Tomeu Vizoso <tomeu.vizoso@collabora.com>,
David Airlie <airlied@linux.ie>,
linux-kernel@vger.kernel.org, Liam Girdwood <lgirdwood@gmail.com>,
dri-devel@lists.freedesktop.org,
Steven Price <steven.price@arm.com>,
Mark Brown <broonie@kernel.org>,
linux-mediatek@lists.infradead.org,
Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>,
hsinyi@chromium.org, Matthias Brugger <matthias.bgg@gmail.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 4/7] drm/panfrost: Add support for a second regulator for the GPU
Date: Wed, 8 Jan 2020 13:23:34 +0800 [thread overview]
Message-ID: <20200108052337.65916-5-drinkcat@chromium.org> (raw)
In-Reply-To: <20200108052337.65916-1-drinkcat@chromium.org>
Some GPUs, namely, the bifrost/g72 part on MT8183, have a second
regulator for their SRAM, let's add support for that.
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
---
drivers/gpu/drm/panfrost/panfrost_device.c | 21 +++++++++++++++++++++
drivers/gpu/drm/panfrost/panfrost_device.h | 1 +
2 files changed, 22 insertions(+)
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c
index 238fb6d54df4732..a0b0a6fef8b4e63 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.c
+++ b/drivers/gpu/drm/panfrost/panfrost_device.c
@@ -102,12 +102,33 @@ static int panfrost_regulator_init(struct panfrost_device *pfdev)
return ret;
}
+ pfdev->regulator_sram = devm_regulator_get_optional(pfdev->dev, "sram");
+ if (IS_ERR(pfdev->regulator_sram)) {
+ ret = PTR_ERR(pfdev->regulator_sram);
+ dev_err(pfdev->dev, "failed to get SRAM regulator: %d\n", ret);
+ goto err;
+ }
+
+ if (pfdev->regulator_sram) {
+ ret = regulator_enable(pfdev->regulator_sram);
+ if (ret < 0) {
+ dev_err(pfdev->dev,
+ "failed to enable SRAM regulator: %d\n", ret);
+ goto err;
+ }
+ }
+
return 0;
+
+err:
+ regulator_disable(pfdev->regulator);
+ return ret;
}
static void panfrost_regulator_fini(struct panfrost_device *pfdev)
{
regulator_disable(pfdev->regulator);
+ regulator_disable(pfdev->regulator_sram);
}
int panfrost_device_init(struct panfrost_device *pfdev)
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h
index 06713811b92cdf7..a124334d69e7e93 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.h
+++ b/drivers/gpu/drm/panfrost/panfrost_device.h
@@ -60,6 +60,7 @@ struct panfrost_device {
struct clk *clock;
struct clk *bus_clock;
struct regulator *regulator;
+ struct regulator *regulator_sram;
struct reset_control *rstc;
struct panfrost_features features;
--
2.24.1.735.g03f4e72817-goog
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next prev parent reply other threads:[~2020-01-08 5:24 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-08 5:23 [PATCH v2 0/7] Add dts for mt8183 GPU (and misc panfrost patches) Nicolas Boichat
2020-01-08 5:23 ` [PATCH v2 1/7] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183 Nicolas Boichat
2020-01-08 5:23 ` [PATCH v2 2/7] arm64: dts: mt8183: Add node for the Mali GPU Nicolas Boichat
2020-01-08 5:23 ` [PATCH v2 3/7] drm/panfrost: Improve error reporting in panfrost_gpu_power_on Nicolas Boichat
2020-01-09 12:03 ` Steven Price
2020-01-08 5:23 ` Nicolas Boichat [this message]
2020-01-08 13:23 ` [PATCH v2 4/7] drm/panfrost: Add support for a second regulator for the GPU Mark Brown
2020-01-08 22:52 ` Nicolas Boichat
2020-01-09 14:14 ` Steven Price
2020-01-09 16:28 ` Mark Brown
2020-01-09 16:53 ` Steven Price
2020-01-09 19:49 ` Mark Brown
2020-01-10 11:30 ` Steven Price
2020-01-14 7:21 ` Nicolas Boichat
2020-01-09 16:56 ` Rob Herring
2020-01-10 11:39 ` Steven Price
2020-01-08 5:23 ` [PATCH v2 5/7] drm/panfrost: Add support for multiple power domain support Nicolas Boichat
2020-01-09 14:08 ` Steven Price
2020-01-10 1:53 ` Nicolas Boichat
2020-01-27 7:55 ` Ulf Hansson
2020-02-07 2:04 ` Nicolas Boichat
2020-02-07 2:04 ` Nicolas Boichat
2020-01-08 5:23 ` [PATCH v2 6/7, RFC] drm/panfrost: Add bifrost compatible string Nicolas Boichat
2020-01-09 14:11 ` Steven Price
2020-01-08 5:23 ` [PATCH v2 7/7, RFC]: drm/panfrost: devfreq: Add support for 2 regulators Nicolas Boichat
2020-01-08 20:09 ` Rob Herring
2020-01-08 22:44 ` Nicolas Boichat
2020-01-08 12:56 ` [PATCH v2 0/7] Add dts for mt8183 GPU (and misc panfrost patches) Alyssa Rosenzweig
2020-01-09 9:08 ` Nicolas Boichat
2020-01-09 12:01 ` Steven Price
2020-01-09 13:10 ` Robin Murphy
2020-01-09 13:29 ` Steven Price
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