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Date:   Wed, 25 Jan 2017 12:50:27 +0100
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH 3/7] 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@...sung.com>
---
 drivers/pinctrl/samsung/pinctrl-exynos.c    | 58 +++++++++++++++++++++++++++++
 include/linux/soc/samsung/exynos-regs-pmu.h | 19 ++++++++++
 2 files changed, 77 insertions(+)

diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index fa3802970570..f854c92209e1 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -1551,6 +1551,54 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 	EXYNOS5433_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	 = PAD_INITIATE_WAKEUP,
+	.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	 = PAD_INITIATE_WAKEUP,
+	.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	 = PAD_INITIATE_WAKEUP,
+	.init	 = exynos_retention_init,
+};
+
 /*
  * Samsung pinctrl driver data for Exynos5433 SoC. Exynos5433 SoC includes
  * ten gpio/pin-mux/pinconfig controllers.
@@ -1564,6 +1612,7 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 		.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 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 		.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 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 		.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 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 		.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 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 		.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 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 		.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 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 		.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 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 		.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 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 		.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 @@ static void exynos_retention_disable(struct samsung_pinctrl_drv_data *drvdata)
 		.eint_gpio_init = exynos_eint_gpio_init,
 		.suspend	= exynos_pinctrl_suspend,
 		.resume		= exynos_pinctrl_resume,
+		.retention_data	= &exynos5433_retention_data,
 	},
 };
 
diff --git a/include/linux/soc/samsung/exynos-regs-pmu.h b/include/linux/soc/samsung/exynos-regs-pmu.h
index d30186e2b609..6a160e2ef4f0 100644
--- a/include/linux/soc/samsung/exynos-regs-pmu.h
+++ b/include/linux/soc/samsung/exynos-regs-pmu.h
@@ -690,4 +690,23 @@
 					 | EXYNOS5420_KFC_USE_STANDBY_WFI2  \
 					 | EXYNOS5420_KFC_USE_STANDBY_WFI3)
 
+/* For EXYNOS5433 */
+#define EXYNOS5433_PAD_RETENTION_AUD_OPTION			(0x3028)
+#define EXYNOS5433_PAD_RETENTION_MMC2_OPTION			(0x30C8)
+#define EXYNOS5433_PAD_RETENTION_TOP_OPTION			(0x3108)
+#define EXYNOS5433_PAD_RETENTION_UART_OPTION			(0x3128)
+#define EXYNOS5433_PAD_RETENTION_MMC0_OPTION			(0x3148)
+#define EXYNOS5433_PAD_RETENTION_MMC1_OPTION			(0x3168)
+#define EXYNOS5433_PAD_RETENTION_EBIA_OPTION			(0x3188)
+#define EXYNOS5433_PAD_RETENTION_EBIB_OPTION			(0x31A8)
+#define EXYNOS5433_PAD_RETENTION_SPI_OPTION			(0x31C8)
+#define EXYNOS5433_PAD_RETENTION_MIF_OPTION			(0x31E8)
+#define EXYNOS5433_PAD_RETENTION_USBXTI_OPTION			(0x3228)
+#define EXYNOS5433_PAD_RETENTION_BOOTLDO_OPTION			(0x3248)
+#define EXYNOS5433_PAD_RETENTION_UFS_OPTION			(0x3268)
+#define EXYNOS5433_PAD_RETENTION_FSYSGENIO_OPTION		(0x32A8)
+
+/* EXYNOS5433_PAD_RETENTION_*_OPTION */
+#define PAD_INITIATE_WAKEUP					(0x1 << 28)
+
 #endif /* __LINUX_SOC_EXYNOS_REGS_PMU_H */
-- 
1.9.1

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