pinctrl: samsung: Add support for pad retention control for Exynos5433 SoCs

This patch adds support for retention control for Exynos5433 SoCs. Three
groups of pins has been defined for retention control: common shared group
for ALIVE, CPIF, eSE, FINGER, IMEM, NFC, PERIC, TOUCH pin banks and
separate control for FSYS and AUD pin banks, for which PMU retention
registers match whole banks.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

1 files changed, 58 insertions, 0 deletions

diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index fa8bdd9ae198..c0dfd31c0fa2 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -1551,6 +1551,54 @@ static const struct samsung_pin_bank_data exynos5433_pin_banks9[] __initconst =
         EXYNOS_PIN_BANK_EINTG(3, 0x000, "gpj1", 0x00),
 };
 
+/* PMU pin retention groups registers for Exynos5433 (without audio & fsys) */
+static const u32 exynos5433_retention_regs[] = {
+        EXYNOS5433_PAD_RETENTION_TOP_OPTION,
+        EXYNOS5433_PAD_RETENTION_UART_OPTION,
+        EXYNOS5433_PAD_RETENTION_EBIA_OPTION,
+        EXYNOS5433_PAD_RETENTION_EBIB_OPTION,
+        EXYNOS5433_PAD_RETENTION_SPI_OPTION,
+        EXYNOS5433_PAD_RETENTION_MIF_OPTION,
+        EXYNOS5433_PAD_RETENTION_USBXTI_OPTION,
+        EXYNOS5433_PAD_RETENTION_BOOTLDO_OPTION,
+        EXYNOS5433_PAD_RETENTION_UFS_OPTION,
+        EXYNOS5433_PAD_RETENTION_FSYSGENIO_OPTION,
+};
+
+static const struct samsung_retention_data exynos5433_retention_data __initconst = {
+        .regs    = exynos5433_retention_regs,
+        .nr_regs = ARRAY_SIZE(exynos5433_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 exynos5433_audio_retention_regs[] = {
+        EXYNOS5433_PAD_RETENTION_AUD_OPTION,
+};
+
+static const struct samsung_retention_data exynos5433_audio_retention_data __initconst = {
+        .regs    = exynos5433_audio_retention_regs,
+        .nr_regs = ARRAY_SIZE(exynos5433_audio_retention_regs),
+        .value   = EXYNOS_WAKEUP_FROM_LOWPWR,
+        .init    = exynos_retention_init,
+};
+
+/* PMU retention control for mmc pins can be tied to fsys pin bank */
+static const u32 exynos5433_fsys_retention_regs[] = {
+        EXYNOS5433_PAD_RETENTION_MMC0_OPTION,
+        EXYNOS5433_PAD_RETENTION_MMC1_OPTION,
+        EXYNOS5433_PAD_RETENTION_MMC2_OPTION,
+};
+
+static const struct samsung_retention_data exynos5433_fsys_retention_data __initconst = {
+        .regs    = exynos5433_fsys_retention_regs,
+        .nr_regs = ARRAY_SIZE(exynos5433_fsys_retention_regs),
+        .value   = EXYNOS_WAKEUP_FROM_LOWPWR,
+        .init    = exynos_retention_init,
+};
+
 /*
  * Samsung pinctrl driver data for Exynos5433 SoC. Exynos5433 SoC includes
  * ten gpio/pin-mux/pinconfig controllers.
@@ -1564,6 +1612,7 @@ const struct samsung_pin_ctrl exynos5433_pin_ctrl[] __initconst = {
                 .suspend        = exynos_pinctrl_suspend,
                 .resume         = exynos_pinctrl_resume,
                 .nr_ext_resources = 1,
+                .retention_data = &exynos5433_retention_data,
         }, {
                 /* pin-controller instance 1 data */
                 .pin_banks      = exynos5433_pin_banks1,
@@ -1571,6 +1620,7 @@ const struct samsung_pin_ctrl exynos5433_pin_ctrl[] __initconst = {
                 .eint_gpio_init = exynos_eint_gpio_init,
                 .suspend        = exynos_pinctrl_suspend,
                 .resume         = exynos_pinctrl_resume,
+                .retention_data = &exynos5433_audio_retention_data,
         }, {
                 /* pin-controller instance 2 data */
                 .pin_banks      = exynos5433_pin_banks2,
@@ -1578,6 +1628,7 @@ const struct samsung_pin_ctrl exynos5433_pin_ctrl[] __initconst = {
                 .eint_gpio_init = exynos_eint_gpio_init,
                 .suspend        = exynos_pinctrl_suspend,
                 .resume         = exynos_pinctrl_resume,
+                .retention_data = &exynos5433_retention_data,
         }, {
                 /* pin-controller instance 3 data */
                 .pin_banks      = exynos5433_pin_banks3,
@@ -1585,6 +1636,7 @@ const struct samsung_pin_ctrl exynos5433_pin_ctrl[] __initconst = {
                 .eint_gpio_init = exynos_eint_gpio_init,
                 .suspend        = exynos_pinctrl_suspend,
                 .resume         = exynos_pinctrl_resume,
+                .retention_data = &exynos5433_retention_data,
         }, {
                 /* pin-controller instance 4 data */
                 .pin_banks      = exynos5433_pin_banks4,
@@ -1592,6 +1644,7 @@ const struct samsung_pin_ctrl exynos5433_pin_ctrl[] __initconst = {
                 .eint_gpio_init = exynos_eint_gpio_init,
                 .suspend        = exynos_pinctrl_suspend,
                 .resume         = exynos_pinctrl_resume,
+                .retention_data = &exynos5433_retention_data,
         }, {
                 /* pin-controller instance 5 data */
                 .pin_banks      = exynos5433_pin_banks5,
@@ -1599,6 +1652,7 @@ const struct samsung_pin_ctrl exynos5433_pin_ctrl[] __initconst = {
                 .eint_gpio_init = exynos_eint_gpio_init,
                 .suspend        = exynos_pinctrl_suspend,
                 .resume         = exynos_pinctrl_resume,
+                .retention_data = &exynos5433_fsys_retention_data,
         }, {
                 /* pin-controller instance 6 data */
                 .pin_banks      = exynos5433_pin_banks6,
@@ -1606,6 +1660,7 @@ const struct samsung_pin_ctrl exynos5433_pin_ctrl[] __initconst = {
                 .eint_gpio_init = exynos_eint_gpio_init,
                 .suspend        = exynos_pinctrl_suspend,
                 .resume         = exynos_pinctrl_resume,
+                .retention_data = &exynos5433_retention_data,
         }, {
                 /* pin-controller instance 7 data */
                 .pin_banks      = exynos5433_pin_banks7,
@@ -1613,6 +1668,7 @@ const struct samsung_pin_ctrl exynos5433_pin_ctrl[] __initconst = {
                 .eint_gpio_init = exynos_eint_gpio_init,
                 .suspend        = exynos_pinctrl_suspend,
                 .resume         = exynos_pinctrl_resume,
+                .retention_data = &exynos5433_retention_data,
         }, {
                 /* pin-controller instance 8 data */
                 .pin_banks      = exynos5433_pin_banks8,
@@ -1620,6 +1676,7 @@ const struct samsung_pin_ctrl exynos5433_pin_ctrl[] __initconst = {
                 .eint_gpio_init = exynos_eint_gpio_init,
                 .suspend        = exynos_pinctrl_suspend,
                 .resume         = exynos_pinctrl_resume,
+                .retention_data = &exynos5433_retention_data,
         }, {
                 /* pin-controller instance 9 data */
                 .pin_banks      = exynos5433_pin_banks9,
@@ -1627,6 +1684,7 @@ const struct samsung_pin_ctrl exynos5433_pin_ctrl[] __initconst = {
                 .eint_gpio_init = exynos_eint_gpio_init,
                 .suspend        = exynos_pinctrl_suspend,
                 .resume         = exynos_pinctrl_resume,
+                .retention_data = &exynos5433_retention_data,
         },
 };