From: Kishon Vijay Abraham I <kishon@ti.com>
To: <gregkh@linuxfoundation.org>
Cc: <kishon@ti.com>, <linux-kernel@vger.kernel.org>
Subject: [PATCH 21/22] phy: exynos-dp-video: Use syscon support to control pmu register
Date: Wed, 24 Sep 2014 19:17:19 +0530 [thread overview]
Message-ID: <1411566440-19169-22-git-send-email-kishon@ti.com> (raw)
In-Reply-To: <1411566440-19169-1-git-send-email-kishon@ti.com>
From: Vivek Gautam <gautam.vivek@samsung.com>
Currently the DP_PHY_ENABLE register is mapped in the driver,
and accessed to control power to the PHY.
With mfd-syscon and regmap interface available at our disposal,
it's wise to use that instead of using a 'reg' property for the
controller and allocating a memory resource for that.
To facilitate this, we have added another compatible string
for Exynso5420 SoC to acquire driver data which contains
different DP-PHY-CONTROL register offset.
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
.../devicetree/bindings/phy/samsung-phy.txt | 7 +-
drivers/phy/phy-exynos-dp-video.c | 79 +++++++++++++-------
2 files changed, 59 insertions(+), 27 deletions(-)
diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt
index 7a6feea..15e0f2c 100644
--- a/Documentation/devicetree/bindings/phy/samsung-phy.txt
+++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt
@@ -17,8 +17,11 @@ Samsung EXYNOS SoC series Display Port PHY
-------------------------------------------------
Required properties:
-- compatible : should be "samsung,exynos5250-dp-video-phy";
-- reg : offset and length of the Display Port PHY register set;
+- compatible : should be one of the following supported values:
+ - "samsung,exynos5250-dp-video-phy"
+ - "samsung,exynos5420-dp-video-phy"
+- samsung,pmu-syscon: phandle for PMU system controller interface, used to
+ control pmu registers for power isolation.
- #phy-cells : from the generic PHY bindings, must be 0;
Samsung S5P/EXYNOS SoC series USB PHY
diff --git a/drivers/phy/phy-exynos-dp-video.c b/drivers/phy/phy-exynos-dp-video.c
index 8b3026e..53f44a0 100644
--- a/drivers/phy/phy-exynos-dp-video.c
+++ b/drivers/phy/phy-exynos-dp-video.c
@@ -13,44 +13,55 @@
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/exynos5-pmu.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
-/* DPTX_PHY_CONTROL register */
-#define EXYNOS_DPTX_PHY_ENABLE (1 << 0)
+struct exynos_dp_video_phy_drvdata {
+ u32 phy_ctrl_offset;
+};
struct exynos_dp_video_phy {
- void __iomem *regs;
+ struct regmap *regs;
+ const struct exynos_dp_video_phy_drvdata *drvdata;
};
-static int __set_phy_state(struct exynos_dp_video_phy *state, unsigned int on)
+static void exynos_dp_video_phy_pwr_isol(struct exynos_dp_video_phy *state,
+ unsigned int on)
{
- u32 reg;
+ unsigned int val;
+
+ if (IS_ERR(state->regs))
+ return;
- reg = readl(state->regs);
- if (on)
- reg |= EXYNOS_DPTX_PHY_ENABLE;
- else
- reg &= ~EXYNOS_DPTX_PHY_ENABLE;
- writel(reg, state->regs);
+ val = on ? 0 : EXYNOS5_PHY_ENABLE;
- return 0;
+ regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset,
+ EXYNOS5_PHY_ENABLE, val);
}
static int exynos_dp_video_phy_power_on(struct phy *phy)
{
struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
- return __set_phy_state(state, 1);
+ /* Disable power isolation on DP-PHY */
+ exynos_dp_video_phy_pwr_isol(state, 0);
+
+ return 0;
}
static int exynos_dp_video_phy_power_off(struct phy *phy)
{
struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
- return __set_phy_state(state, 0);
+ /* Enable power isolation on DP-PHY */
+ exynos_dp_video_phy_pwr_isol(state, 1);
+
+ return 0;
}
static struct phy_ops exynos_dp_video_phy_ops = {
@@ -59,11 +70,31 @@ static struct phy_ops exynos_dp_video_phy_ops = {
.owner = THIS_MODULE,
};
+static const struct exynos_dp_video_phy_drvdata exynos5250_dp_video_phy = {
+ .phy_ctrl_offset = EXYNOS5_DPTX_PHY_CONTROL,
+};
+
+static const struct exynos_dp_video_phy_drvdata exynos5420_dp_video_phy = {
+ .phy_ctrl_offset = EXYNOS5420_DPTX_PHY_CONTROL,
+};
+
+static const struct of_device_id exynos_dp_video_phy_of_match[] = {
+ {
+ .compatible = "samsung,exynos5250-dp-video-phy",
+ .data = &exynos5250_dp_video_phy,
+ }, {
+ .compatible = "samsung,exynos5420-dp-video-phy",
+ .data = &exynos5420_dp_video_phy,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match);
+
static int exynos_dp_video_phy_probe(struct platform_device *pdev)
{
struct exynos_dp_video_phy *state;
struct device *dev = &pdev->dev;
- struct resource *res;
+ const struct of_device_id *match;
struct phy_provider *phy_provider;
struct phy *phy;
@@ -71,11 +102,15 @@ static int exynos_dp_video_phy_probe(struct platform_device *pdev)
if (!state)
return -ENOMEM;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
- state->regs = devm_ioremap_resource(dev, res);
- if (IS_ERR(state->regs))
+ state->regs = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "samsung,pmu-syscon");
+ if (IS_ERR(state->regs)) {
+ dev_err(dev, "Failed to lookup PMU regmap\n");
return PTR_ERR(state->regs);
+ }
+
+ match = of_match_node(exynos_dp_video_phy_of_match, dev->of_node);
+ state->drvdata = match->data;
phy = devm_phy_create(dev, NULL, &exynos_dp_video_phy_ops, NULL);
if (IS_ERR(phy)) {
@@ -89,12 +124,6 @@ static int exynos_dp_video_phy_probe(struct platform_device *pdev)
return PTR_ERR_OR_ZERO(phy_provider);
}
-static const struct of_device_id exynos_dp_video_phy_of_match[] = {
- { .compatible = "samsung,exynos5250-dp-video-phy" },
- { },
-};
-MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match);
-
static struct platform_driver exynos_dp_video_phy_driver = {
.probe = exynos_dp_video_phy_probe,
.driver = {
--
1.7.9.5
next prev parent reply other threads:[~2014-09-24 13:48 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-24 13:46 [GIT PULL 00/22] PHY: for 3.18 Kishon Vijay Abraham I
2014-09-24 13:46 ` [PATCH 01/22] phy: Renesas R-Car Gen2 PHY driver Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 02/22] phy: phy-omap-control: Remove unncessary site specific OOM messages Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 03/22] phy: phy-mvebu-sata: Add missing error check for devm_kzalloc Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 04/22] phy: phy-omap-usb2: Remove unncessary site specific OOM messages Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 05/22] phy: phy-ti-pipe3: " Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 06/22] phy: phy-spear1310-miphy: " Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 07/22] phy: phy-spear1340-miphy: " Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 08/22] phy: phy-spear1310-miphy: Use module_platform_driver to register driver Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 09/22] phy: phy-spear1340-miphy: " Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 10/22] usb: phy: twl4030-usb: Remove unused irq_enabled Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 11/22] usb: phy: twl4030-usb: Simplify phy init to use runtime PM Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 12/22] usb: phy: twl4030-usb: Move code from twl4030_phy_power to the runtime PM calls Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 13/22] usb: phy: twl4030-usb: Remove asleep and rely on runtime PM Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 14/22] usb: phy: twl4030-usb: Use mutex instead of spinlock for protecting the data Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 15/22] phy: phy-stih407-usb: Add usb picoPHY driver found on stih407 SoC family Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 16/22] phy: phy-stih407-usb: Add dt documentation for USB picophy " Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 17/22] MAINTAINERS: Add phy-stih407-usb.c file to ARCH/STI architecture Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 18/22] phy: phy-stih41x-usb: Add usb phy support for STiH41x SoCs Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 19/22] phy: phy-stih41x-usb: Add dt documentation for USB phy on STiH415/6 Kishon Vijay Abraham I
2014-09-24 13:47 ` [PATCH 20/22] MAINTAINERS: Add phy-stih41x-usb.c to ARCH/STI architecture Kishon Vijay Abraham I
2014-09-24 13:47 ` Kishon Vijay Abraham I [this message]
2014-09-24 13:47 ` [PATCH 22/22] phy: remove .owner field for drivers using module_platform_driver Kishon Vijay Abraham I
2014-09-25 12:17 ` [GIT PULL 00/22] PHY: for 3.18 Greg KH
2014-09-25 12:29 ` Kishon Vijay Abraham I
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