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path: root/drivers/pinctrl/samsung
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-rw-r--r--drivers/pinctrl/samsung/pinctrl-exynos.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index 53baafdad51b..c81df3c843c3 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -28,7 +28,10 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/regmap.h>
#include <linux/err.h>
+#include <linux/soc/samsung/exynos-pmu.h>
+#include <linux/soc/samsung/exynos-regs-pmu.h>
#include "pinctrl-samsung.h"
#include "pinctrl-exynos.h"
@@ -679,6 +682,54 @@ const struct samsung_pin_ctrl s5pv210_pin_ctrl[] __initconst = {
},
};
+/* Pad retention control code for accessing PMU regmap */
+static atomic_t exynos_shared_retention_refcnt;
+
+static void exynos_retention_enable(struct samsung_pinctrl_drv_data *drvdata)
+{
+ if (drvdata->retention_ctrl->refcnt)
+ atomic_inc(drvdata->retention_ctrl->refcnt);
+}
+
+static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
+{
+ struct samsung_retention_ctrl *ctrl = drvdata->retention_ctrl;
+ struct regmap *pmu_regs = ctrl->priv;
+ int i;
+
+ if (ctrl->refcnt && !atomic_dec_and_test(ctrl->refcnt))
+ return;
+
+ for (i = 0; i < ctrl->nr_regs; i++)
+ regmap_write(pmu_regs, ctrl->regs[i], ctrl->value);
+}
+
+static struct samsung_retention_ctrl *
+exynos_retention_init(struct samsung_pinctrl_drv_data *drvdata,
+ const struct samsung_retention_data *data)
+{
+ struct samsung_retention_ctrl *ctrl;
+ struct regmap *pmu_regs;
+
+ ctrl = devm_kzalloc(drvdata->dev, sizeof(*ctrl), GFP_KERNEL);
+ if (!ctrl)
+ return ERR_PTR(-ENOMEM);
+
+ pmu_regs = exynos_get_pmu_regmap();
+ if (IS_ERR(pmu_regs))
+ return ERR_CAST(pmu_regs);
+
+ ctrl->priv = pmu_regs;
+ ctrl->regs = data->regs;
+ ctrl->nr_regs = data->nr_regs;
+ ctrl->value = data->value;
+ ctrl->refcnt = data->refcnt;
+ ctrl->enable = exynos_retention_enable;
+ ctrl->disable = exynos_retention_disable;
+
+ return ctrl;
+}
+
/* pin banks of exynos3250 pin-controller 0 */
static const struct samsung_pin_bank_data exynos3250_pin_banks0[] __initconst = {
EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpa0", 0x00),
@@ -711,6 +762,30 @@ static const struct samsung_pin_bank_data exynos3250_pin_banks1[] __initconst =
};
/*
+ * PMU pad retention groups for Exynos3250 doesn't match pin banks, so handle
+ * them all together
+ */
+static const u32 exynos3250_retention_regs[] = {
+ S5P_PAD_RET_MAUDIO_OPTION,
+ S5P_PAD_RET_GPIO_OPTION,
+ S5P_PAD_RET_UART_OPTION,
+ S5P_PAD_RET_MMCA_OPTION,
+ S5P_PAD_RET_MMCB_OPTION,
+ S5P_PAD_RET_EBIA_OPTION,
+ S5P_PAD_RET_EBIB_OPTION,
+ S5P_PAD_RET_MMC2_OPTION,
+ S5P_PAD_RET_SPI_OPTION,
+};
+
+static const struct samsung_retention_data exynos3250_retention_data __initconst = {
+ .regs = exynos3250_retention_regs,
+ .nr_regs = ARRAY_SIZE(exynos3250_retention_regs),
+ .value = EXYNOS_WAKEUP_FROM_LOWPWR,
+ .refcnt = &exynos_shared_retention_refcnt,
+ .init = exynos_retention_init,
+};
+
+/*
* Samsung pinctrl driver data for Exynos3250 SoC. Exynos3250 SoC includes
* two gpio/pin-mux/pinconfig controllers.
*/
@@ -722,6 +797,7 @@ const struct samsung_pin_ctrl exynos3250_pin_ctrl[] __initconst = {
.eint_gpio_init = exynos_eint_gpio_init,
.suspend = exynos_pinctrl_suspend,
.resume = exynos_pinctrl_resume,
+ .retention_data = &exynos3250_retention_data,
}, {
/* pin-controller instance 1 data */
.pin_banks = exynos3250_pin_banks1,
@@ -730,6 +806,7 @@ const struct samsung_pin_ctrl exynos3250_pin_ctrl[] __initconst = {
.eint_wkup_init = exynos_eint_wkup_init,
.suspend = exynos_pinctrl_suspend,
.resume = exynos_pinctrl_resume,
+ .retention_data = &exynos3250_retention_data,
},
};
@@ -782,6 +859,36 @@ static const struct samsung_pin_bank_data exynos4210_pin_banks2[] __initconst =
EXYNOS_PIN_BANK_EINTN(7, 0x000, "gpz"),
};
+/* PMU pad retention groups registers for Exynos4 (without audio) */
+static const u32 exynos4_retention_regs[] = {
+ S5P_PAD_RET_GPIO_OPTION,
+ S5P_PAD_RET_UART_OPTION,
+ S5P_PAD_RET_MMCA_OPTION,
+ S5P_PAD_RET_MMCB_OPTION,
+ S5P_PAD_RET_EBIA_OPTION,
+ S5P_PAD_RET_EBIB_OPTION,
+};
+
+static const struct samsung_retention_data exynos4_retention_data __initconst = {
+ .regs = exynos4_retention_regs,
+ .nr_regs = ARRAY_SIZE(exynos4_retention_regs),
+ .value = EXYNOS_WAKEUP_FROM_LOWPWR,
+ .refcnt = &exynos_shared_retention_refcnt,
+ .init = exynos_retention_init,
+};
+
+/* PMU retention control for audio pins can be tied to audio pin bank */
+static const u32 exynos4_audio_retention_regs[] = {
+ S5P_PAD_RET_MAUDIO_OPTION,
+};
+
+static const struct samsung_retention_data exynos4_audio_retention_data __initconst = {
+ .regs = exynos4_audio_retention_regs,
+ .nr_regs = ARRAY_SIZE(exynos4_audio_retention_regs),
+ .value = EXYNOS_WAKEUP_FROM_LOWPWR,
+ .init = exynos_retention_init,
+};
+
/*
* Samsung pinctrl driver data for Exynos4210 SoC. Exynos4210 SoC includes
* three gpio/pin-mux/pinconfig controllers.
@@ -794,6 +901,7 @@ const struct samsung_pin_ctrl exynos4210_pin_ctrl[] __initconst = {
.eint_gpio_init = exynos_eint_gpio_init,
.suspend = exynos_pinctrl_suspend,
.resume = exynos_pinctrl_resume,
+ .retention_data = &exynos4_retention_data,
}, {
/* pin-controller instance 1 data */
.pin_banks = exynos4210_pin_banks1,
@@ -802,10 +910,12 @@ const struct samsung_pin_ctrl exynos4210_pin_ctrl[] __initconst = {
.eint_wkup_init = exynos_eint_wkup_init,
.suspend = exynos_pinctrl_suspend,
.resume = exynos_pinctrl_resume,
+ .retention_data = &exynos4_retention_data,
}, {
/* pin-controller instance 2 data */
.pin_banks = exynos4210_pin_banks2,
.nr_banks = ARRAY_SIZE(exynos4210_pin_banks2),
+ .retention_data = &exynos4_audio_retention_data,
},
};
@@ -879,6 +989,7 @@ const struct samsung_pin_ctrl exynos4x12_pin_ctrl[] __initconst = {
.eint_gpio_init = exynos_eint_gpio_init,
.suspend = exynos_pinctrl_suspend,
.resume = exynos_pinctrl_resume,
+ .retention_data = &exynos4_retention_data,
}, {
/* pin-controller instance 1 data */
.pin_banks = exynos4x12_pin_banks1,
@@ -887,6 +998,7 @@ const struct samsung_pin_ctrl exynos4x12_pin_ctrl[] __initconst = {
.eint_wkup_init = exynos_eint_wkup_init,
.suspend = exynos_pinctrl_suspend,
.resume = exynos_pinctrl_resume,
+ .retention_data = &exynos4_retention_data,
}, {
/* pin-controller instance 2 data */
.pin_banks = exynos4x12_pin_banks2,
@@ -894,6 +1006,7 @@ const struct samsung_pin_ctrl exynos4x12_pin_ctrl[] __initconst = {
.eint_gpio_init = exynos_eint_gpio_init,
.suspend = exynos_pinctrl_suspend,
.resume = exynos_pinctrl_resume,
+ .retention_data = &exynos4_audio_retention_data,
}, {
/* pin-controller instance 3 data */
.pin_banks = exynos4x12_pin_banks3,
@@ -973,6 +1086,7 @@ const struct samsung_pin_ctrl exynos5250_pin_ctrl[] __initconst = {
.eint_wkup_init = exynos_eint_wkup_init,
.suspend = exynos_pinctrl_suspend,
.resume = exynos_pinctrl_resume,
+ .retention_data = &exynos4_retention_data,
}, {
/* pin-controller instance 1 data */
.pin_banks = exynos5250_pin_banks1,
@@ -980,6 +1094,7 @@ const struct samsung_pin_ctrl exynos5250_pin_ctrl[] __initconst = {
.eint_gpio_init = exynos_eint_gpio_init,
.suspend = exynos_pinctrl_suspend,
.resume = exynos_pinctrl_resume,
+ .retention_data = &exynos4_retention_data,
}, {
/* pin-controller instance 2 data */
.pin_banks = exynos5250_pin_banks2,
@@ -994,6 +1109,7 @@ const struct samsung_pin_ctrl exynos5250_pin_ctrl[] __initconst = {
.eint_gpio_init = exynos_eint_gpio_init,
.suspend = exynos_pinctrl_suspend,
.resume = exynos_pinctrl_resume,
+ .retention_data = &exynos4_audio_retention_data,
},
};
@@ -1220,6 +1336,30 @@ static const struct samsung_pin_bank_data exynos5420_pin_banks4[] __initconst =
EXYNOS_PIN_BANK_EINTG(7, 0x000, "gpz", 0x00),
};
+/* PMU pad retention groups registers for Exynos5420 (without audio) */
+static const u32 exynos5420_retention_regs[] = {
+ EXYNOS_PAD_RET_DRAM_OPTION,
+ EXYNOS_PAD_RET_JTAG_OPTION,
+ EXYNOS5420_PAD_RET_GPIO_OPTION,
+ EXYNOS5420_PAD_RET_UART_OPTION,
+ EXYNOS5420_PAD_RET_MMCA_OPTION,
+ EXYNOS5420_PAD_RET_MMCB_OPTION,
+ EXYNOS5420_PAD_RET_MMCC_OPTION,
+ EXYNOS5420_PAD_RET_HSI_OPTION,
+ EXYNOS_PAD_RET_EBIA_OPTION,
+ EXYNOS_PAD_RET_EBIB_OPTION,
+ EXYNOS5420_PAD_RET_SPI_OPTION,
+ EXYNOS5420_PAD_RET_DRAM_COREBLK_OPTION,
+};
+
+static const struct samsung_retention_data exynos5420_retention_data __initconst = {
+ .regs = exynos5420_retention_regs,
+ .nr_regs = ARRAY_SIZE(exynos5420_retention_regs),
+ .value = EXYNOS_WAKEUP_FROM_LOWPWR,
+ .refcnt = &exynos_shared_retention_refcnt,
+ .init = exynos_retention_init,
+};
+
/*
* Samsung pinctrl driver data for Exynos5420 SoC. Exynos5420 SoC includes
* four gpio/pin-mux/pinconfig controllers.
@@ -1231,26 +1371,31 @@ const struct samsung_pin_ctrl exynos5420_pin_ctrl[] __initconst = {
.nr_banks = ARRAY_SIZE(exynos5420_pin_banks0),
.eint_gpio_init = exynos_eint_gpio_init,
.eint_wkup_init = exynos_eint_wkup_init,
+ .retention_data = &exynos5420_retention_data,
}, {
/* pin-controller instance 1 data */
.pin_banks = exynos5420_pin_banks1,
.nr_banks = ARRAY_SIZE(exynos5420_pin_banks1),
.eint_gpio_init = exynos_eint_gpio_init,
+ .retention_data = &exynos5420_retention_data,
}, {
/* pin-controller instance 2 data */
.pin_banks = exynos5420_pin_banks2,
.nr_banks = ARRAY_SIZE(exynos5420_pin_banks2),
.eint_gpio_init = exynos_eint_gpio_init,
+ .retention_data = &exynos5420_retention_data,
}, {
/* pin-controller instance 3 data */
.pin_banks = exynos5420_pin_banks3,
.nr_banks = ARRAY_SIZE(exynos5420_pin_banks3),
.eint_gpio_init = exynos_eint_gpio_init,
+ .retention_data = &exynos5420_retention_data,
}, {
/* pin-controller instance 4 data */
.pin_banks = exynos5420_pin_banks4,
.nr_banks = ARRAY_SIZE(exynos5420_pin_banks4),
.eint_gpio_init = exynos_eint_gpio_init,
+ .retention_data = &exynos4_audio_retention_data,
},
};
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