[PATCH 1/2] phy: samsung: Add support for the Exynos5420 variant of the USB2 PHY
From: Marek Szyprowski
Date: Fri Nov 20 2020 - 03:57:26 EST
Exynos5420 differs a bit from Exynos5250 in USB2 PHY related registers in
the PMU region. Add a variant for the Exynos5420 case. Till now, USB2 PHY
worked only because the bootloader enabled the PHY, but then driver messed
USB 3.0 DRD related registers during the suspend/resume cycle.
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
---
.../devicetree/bindings/phy/samsung-phy.txt | 1 +
drivers/phy/samsung/Kconfig | 7 ++-
drivers/phy/samsung/phy-exynos5250-usb2.c | 48 +++++++++++++------
drivers/phy/samsung/phy-samsung-usb2.c | 6 +++
drivers/phy/samsung/phy-samsung-usb2.h | 1 +
5 files changed, 48 insertions(+), 15 deletions(-)
diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt
index 7510830a79bd..8f51aee91101 100644
--- a/Documentation/devicetree/bindings/phy/samsung-phy.txt
+++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt
@@ -47,6 +47,7 @@ Required properties:
- "samsung,exynos4210-usb2-phy"
- "samsung,exynos4x12-usb2-phy"
- "samsung,exynos5250-usb2-phy"
+ - "samsung,exynos5420-usb2-phy"
- "samsung,s5pv210-usb2-phy"
- reg : a list of registers used by phy driver
- first and obligatory is the location of phy modules registers
diff --git a/drivers/phy/samsung/Kconfig b/drivers/phy/samsung/Kconfig
index e20d2fcc9fe7..0f51d3bf38cc 100644
--- a/drivers/phy/samsung/Kconfig
+++ b/drivers/phy/samsung/Kconfig
@@ -64,7 +64,12 @@ config PHY_EXYNOS4X12_USB2
config PHY_EXYNOS5250_USB2
bool
depends on PHY_SAMSUNG_USB2
- default SOC_EXYNOS5250 || SOC_EXYNOS5420
+ default SOC_EXYNOS5250
+
+config PHY_EXYNOS5420_USB2
+ bool
+ depends on PHY_SAMSUNG_USB2
+ default SOC_EXYNOS5420
config PHY_S5PV210_USB2
bool "Support for S5PV210"
diff --git a/drivers/phy/samsung/phy-exynos5250-usb2.c b/drivers/phy/samsung/phy-exynos5250-usb2.c
index 4f53b711fd6f..e198010e1bfd 100644
--- a/drivers/phy/samsung/phy-exynos5250-usb2.c
+++ b/drivers/phy/samsung/phy-exynos5250-usb2.c
@@ -117,9 +117,9 @@
/* Isolation, configured in the power management unit */
#define EXYNOS_5250_USB_ISOL_OTG_OFFSET 0x704
-#define EXYNOS_5250_USB_ISOL_OTG BIT(0)
#define EXYNOS_5250_USB_ISOL_HOST_OFFSET 0x708
-#define EXYNOS_5250_USB_ISOL_HOST BIT(0)
+#define EXYNOS_5420_USB_ISOL_HOST_OFFSET 0x70C
+#define EXYNOS_5250_USB_ISOL_ENABLE BIT(0)
/* Mode swtich register */
#define EXYNOS_5250_MODE_SWITCH_OFFSET 0x230
@@ -132,7 +132,6 @@ enum exynos4x12_phy_id {
EXYNOS5250_HOST,
EXYNOS5250_HSIC0,
EXYNOS5250_HSIC1,
- EXYNOS5250_NUM_PHYS,
};
/*
@@ -176,20 +175,19 @@ static void exynos5250_isol(struct samsung_usb2_phy_instance *inst, bool on)
{
struct samsung_usb2_phy_driver *drv = inst->drv;
u32 offset;
- u32 mask;
+ u32 mask = EXYNOS_5250_USB_ISOL_ENABLE;
- switch (inst->cfg->id) {
- case EXYNOS5250_DEVICE:
+ if (drv->cfg == &exynos5250_usb2_phy_config &&
+ inst->cfg->id == EXYNOS5250_DEVICE)
offset = EXYNOS_5250_USB_ISOL_OTG_OFFSET;
- mask = EXYNOS_5250_USB_ISOL_OTG;
- break;
- case EXYNOS5250_HOST:
+ else if (drv->cfg == &exynos5250_usb2_phy_config &&
+ inst->cfg->id == EXYNOS5250_HOST)
offset = EXYNOS_5250_USB_ISOL_HOST_OFFSET;
- mask = EXYNOS_5250_USB_ISOL_HOST;
- break;
- default:
+ else if (drv->cfg == &exynos5420_usb2_phy_config &&
+ inst->cfg->id == EXYNOS5250_HOST)
+ offset = EXYNOS_5420_USB_ISOL_HOST_OFFSET;
+ else
return;
- }
regmap_update_bits(drv->reg_pmu, offset, mask, on ? 0 : mask);
}
@@ -390,9 +388,31 @@ static const struct samsung_usb2_common_phy exynos5250_phys[] = {
},
};
+static const struct samsung_usb2_common_phy exynos5420_phys[] = {
+ {
+ .label = "host",
+ .id = EXYNOS5250_HOST,
+ .power_on = exynos5250_power_on,
+ .power_off = exynos5250_power_off,
+ },
+ {
+ .label = "hsic",
+ .id = EXYNOS5250_HSIC0,
+ .power_on = exynos5250_power_on,
+ .power_off = exynos5250_power_off,
+ },
+};
+
const struct samsung_usb2_phy_config exynos5250_usb2_phy_config = {
.has_mode_switch = 1,
- .num_phys = EXYNOS5250_NUM_PHYS,
+ .num_phys = ARRAY_SIZE(exynos5250_phys),
.phys = exynos5250_phys,
.rate_to_clk = exynos5250_rate_to_clk,
};
+
+const struct samsung_usb2_phy_config exynos5420_usb2_phy_config = {
+ .has_mode_switch = 1,
+ .num_phys = ARRAY_SIZE(exynos5420_phys),
+ .phys = exynos5420_phys,
+ .rate_to_clk = exynos5250_rate_to_clk,
+};
diff --git a/drivers/phy/samsung/phy-samsung-usb2.c b/drivers/phy/samsung/phy-samsung-usb2.c
index f79f605cff79..3908153f2ce5 100644
--- a/drivers/phy/samsung/phy-samsung-usb2.c
+++ b/drivers/phy/samsung/phy-samsung-usb2.c
@@ -128,6 +128,12 @@ static const struct of_device_id samsung_usb2_phy_of_match[] = {
.data = &exynos5250_usb2_phy_config,
},
#endif
+#ifdef CONFIG_PHY_EXYNOS5420_USB2
+ {
+ .compatible = "samsung,exynos5420-usb2-phy",
+ .data = &exynos5420_usb2_phy_config,
+ },
+#endif
#ifdef CONFIG_PHY_S5PV210_USB2
{
.compatible = "samsung,s5pv210-usb2-phy",
diff --git a/drivers/phy/samsung/phy-samsung-usb2.h b/drivers/phy/samsung/phy-samsung-usb2.h
index 77fb23bc218f..ebaf43bfc5a2 100644
--- a/drivers/phy/samsung/phy-samsung-usb2.h
+++ b/drivers/phy/samsung/phy-samsung-usb2.h
@@ -66,5 +66,6 @@ extern const struct samsung_usb2_phy_config exynos3250_usb2_phy_config;
extern const struct samsung_usb2_phy_config exynos4210_usb2_phy_config;
extern const struct samsung_usb2_phy_config exynos4x12_usb2_phy_config;
extern const struct samsung_usb2_phy_config exynos5250_usb2_phy_config;
+extern const struct samsung_usb2_phy_config exynos5420_usb2_phy_config;
extern const struct samsung_usb2_phy_config s5pv210_usb2_phy_config;
#endif
--
2.17.1