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Message-Id: <20181113111633.20189-17-jagan@amarulasolutions.com>
Date: Tue, 13 Nov 2018 16:46:23 +0530
From: Jagan Teki <jagan@...rulasolutions.com>
To: Maxime Ripard <maxime.ripard@...tlin.com>,
Chen-Yu Tsai <wens@...e.org>, Icenowy Zheng <icenowy@...c.io>,
Jernej Skrabec <jernej.skrabec@...l.net>,
Vasily Khoruzhick <anarsoul@...il.com>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
David Airlie <airlied@...ux.ie>,
dri-devel@...ts.freedesktop.org,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>, linux-clk@...r.kernel.org,
Michael Trimarchi <michael@...rulasolutions.com>,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com,
linux-amarula@...rulasolutions.com
Cc: Jagan Teki <jagan@...rulasolutions.com>
Subject: [PATCH v4 16/26] drm/sun4i: sun6i_mipi_dsi: Add support for VCC-DSI voltage regulator
Some boards have VCC-DSI pin connected to voltage regulator which may
not be turned on by default.
Add support for such boards by adding voltage regulator handling code to
MIPI DSI driver.
Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
---
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 14 ++++++++++++++
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h | 3 +++
2 files changed, 17 insertions(+)
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index 703722f7c81b..2ea33db61ae1 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -1026,6 +1026,12 @@ static int sun6i_dsi_probe(struct platform_device *pdev)
return PTR_ERR(base);
}
+ dsi->regulator = devm_regulator_get(dev, "vcc-dsi");
+ if (IS_ERR(dsi->regulator)) {
+ dev_err(dev, "Couldn't get VCC-DSI supply\n");
+ return PTR_ERR(dsi->regulator);
+ }
+
dsi->regs = devm_regmap_init_mmio_clk(dev, "bus", base,
&sun6i_dsi_regmap_config);
if (IS_ERR(dsi->regs)) {
@@ -1107,6 +1113,13 @@ static int sun6i_dsi_remove(struct platform_device *pdev)
static int __maybe_unused sun6i_dsi_runtime_resume(struct device *dev)
{
struct sun6i_dsi *dsi = dev_get_drvdata(dev);
+ int err;
+
+ err = regulator_enable(dsi->regulator);
+ if (err) {
+ dev_err(dsi->dev, "failed to enable VCC-DSI supply: %d\n", err);
+ return err;
+ }
reset_control_deassert(dsi->reset);
if (dsi->variant->has_mod_clk)
@@ -1141,6 +1154,7 @@ static int __maybe_unused sun6i_dsi_runtime_suspend(struct device *dev)
if (dsi->variant->has_mod_clk)
clk_disable_unprepare(dsi->mod_clk);
reset_control_assert(dsi->reset);
+ regulator_disable(dsi->regulator);
return 0;
}
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h
index 597b62227019..0df60f84bab3 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h
@@ -13,6 +13,8 @@
#include <drm/drm_encoder.h>
#include <drm/drm_mipi_dsi.h>
+#include <linux/regulator/consumer.h>
+
struct sun6i_dphy {
struct clk *bus_clk;
struct clk *mod_clk;
@@ -32,6 +34,7 @@ struct sun6i_dsi {
struct clk *bus_clk;
struct clk *mod_clk;
struct regmap *regs;
+ struct regulator *regulator;
struct reset_control *reset;
struct sun6i_dphy *dphy;
--
2.18.0.321.gffc6fa0e3
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