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path: root/drivers/phy/phy-exynos-mipi-video.c
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Diffstat (limited to 'drivers/phy/phy-exynos-mipi-video.c')
-rw-r--r--drivers/phy/phy-exynos-mipi-video.c89
1 files changed, 57 insertions, 32 deletions
diff --git a/drivers/phy/phy-exynos-mipi-video.c b/drivers/phy/phy-exynos-mipi-video.c
index 943e0f88a120..f017b2f2a54e 100644
--- a/drivers/phy/phy-exynos-mipi-video.c
+++ b/drivers/phy/phy-exynos-mipi-video.c
@@ -12,19 +12,18 @@
#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
+#include <linux/mfd/syscon/exynos4-pmu.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
#include <linux/spinlock.h>
+#include <linux/mfd/syscon.h>
-/* MIPI_PHYn_CONTROL register offset: n = 0..1 */
+/* MIPI_PHYn_CONTROL reg. offset (for base address from ioremap): n = 0..1 */
#define EXYNOS_MIPI_PHY_CONTROL(n) ((n) * 4)
-#define EXYNOS_MIPI_PHY_ENABLE (1 << 0)
-#define EXYNOS_MIPI_PHY_SRESETN (1 << 1)
-#define EXYNOS_MIPI_PHY_MRESETN (1 << 2)
-#define EXYNOS_MIPI_PHY_RESET_MASK (3 << 1)
enum exynos_mipi_phy_id {
EXYNOS_MIPI_PHY_ID_CSIS0,
@@ -38,43 +37,62 @@ enum exynos_mipi_phy_id {
((id) == EXYNOS_MIPI_PHY_ID_DSIM0 || (id) == EXYNOS_MIPI_PHY_ID_DSIM1)
struct exynos_mipi_video_phy {
- spinlock_t slock;
struct video_phy_desc {
struct phy *phy;
unsigned int index;
} phys[EXYNOS_MIPI_PHYS_NUM];
+ spinlock_t slock;
void __iomem *regs;
+ struct mutex mutex;
+ struct regmap *regmap;
};
static int __set_phy_state(struct exynos_mipi_video_phy *state,
enum exynos_mipi_phy_id id, unsigned int on)
{
+ const unsigned int offset = EXYNOS4_MIPI_PHY_CONTROL(id / 2);
void __iomem *addr;
- u32 reg, reset;
-
- addr = state->regs + EXYNOS_MIPI_PHY_CONTROL(id / 2);
+ u32 val, reset;
if (is_mipi_dsim_phy_id(id))
- reset = EXYNOS_MIPI_PHY_MRESETN;
- else
- reset = EXYNOS_MIPI_PHY_SRESETN;
-
- spin_lock(&state->slock);
- reg = readl(addr);
- if (on)
- reg |= reset;
+ reset = EXYNOS4_MIPI_PHY_MRESETN;
else
- reg &= ~reset;
- writel(reg, addr);
-
- /* Clear ENABLE bit only if MRESETN, SRESETN bits are not set. */
- if (on)
- reg |= EXYNOS_MIPI_PHY_ENABLE;
- else if (!(reg & EXYNOS_MIPI_PHY_RESET_MASK))
- reg &= ~EXYNOS_MIPI_PHY_ENABLE;
+ reset = EXYNOS4_MIPI_PHY_SRESETN;
+
+ if (state->regmap) {
+ mutex_lock(&state->mutex);
+ regmap_read(state->regmap, offset, &val);
+ if (on)
+ val |= reset;
+ else
+ val &= ~reset;
+ regmap_write(state->regmap, offset, val);
+ if (on)
+ val |= EXYNOS4_MIPI_PHY_ENABLE;
+ else if (!(val & EXYNOS4_MIPI_PHY_RESET_MASK))
+ val &= ~EXYNOS4_MIPI_PHY_ENABLE;
+ regmap_write(state->regmap, offset, val);
+ mutex_unlock(&state->mutex);
+ } else {
+ addr = state->regs + EXYNOS_MIPI_PHY_CONTROL(id / 2);
+
+ spin_lock(&state->slock);
+ val = readl(addr);
+ if (on)
+ val |= reset;
+ else
+ val &= ~reset;
+ writel(val, addr);
+ /* Clear ENABLE bit only if MRESETN, SRESETN bits are not set */
+ if (on)
+ val |= EXYNOS4_MIPI_PHY_ENABLE;
+ else if (!(val & EXYNOS4_MIPI_PHY_RESET_MASK))
+ val &= ~EXYNOS4_MIPI_PHY_ENABLE;
+
+ writel(val, addr);
+ spin_unlock(&state->slock);
+ }
- writel(reg, addr);
- spin_unlock(&state->slock);
return 0;
}
@@ -118,7 +136,6 @@ static int exynos_mipi_video_phy_probe(struct platform_device *pdev)
{
struct exynos_mipi_video_phy *state;
struct device *dev = &pdev->dev;
- struct resource *res;
struct phy_provider *phy_provider;
unsigned int i;
@@ -126,14 +143,22 @@ static int exynos_mipi_video_phy_probe(struct platform_device *pdev)
if (!state)
return -ENOMEM;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ state->regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
+ if (IS_ERR(state->regmap)) {
+ struct resource *res;
- state->regs = devm_ioremap_resource(dev, res);
- if (IS_ERR(state->regs))
- return PTR_ERR(state->regs);
+ dev_info(dev, "regmap lookup failed: %ld\n",
+ PTR_ERR(state->regmap));
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ state->regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(state->regs))
+ return PTR_ERR(state->regs);
+ }
dev_set_drvdata(dev, state);
spin_lock_init(&state->slock);
+ mutex_init(&state->mutex);
for (i = 0; i < EXYNOS_MIPI_PHYS_NUM; i++) {
struct phy *phy = devm_phy_create(dev, NULL,