[U-Boot] [PATCH v2 2/7] rockchip: rk3368: Add pinctrl driver

[Andy Yan <andy.yan@rock-chips.com>]

Add driver to support iomux setup for the most commonly
used peripherals on rk3368.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
---

Changes in v2:
- remove GRF base definition in cru head file
- remove unused function

 arch/arm/include/asm/arch-rockchip/grf_rk3368.h | 440 ++++++++++++++++++++++++
 drivers/pinctrl/Kconfig                         |  10 +
 drivers/pinctrl/rockchip/Makefile               |   1 +
 drivers/pinctrl/rockchip/pinctrl_rk3368.c       | 149 ++++++++
 4 files changed, 600 insertions(+)
 create mode 100644 arch/arm/include/asm/arch-rockchip/grf_rk3368.h
 create mode 100644 drivers/pinctrl/rockchip/pinctrl_rk3368.c

diff --git a/arch/arm/include/asm/arch-rockchip/grf_rk3368.h b/arch/arm/include/asm/arch-rockchip/grf_rk3368.h
new file mode 100644
index 0000000..3233dc3
--- /dev/null
+++ b/arch/arm/include/asm/arch-rockchip/grf_rk3368.h
@@ -0,0 +1,440 @@
+/* (C) Copyright 2016 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+#ifndef _ASM_ARCH_GRF_RK3368_H
+#define _ASM_ARCH_GRF_RK3368_H
+
+#include <common.h>
+
+struct rk3368_grf {
+	u32 gpio1a_iomux;
+	u32 gpio1b_iomux;
+	u32 gpio1c_iomux;
+	u32 gpio1d_iomux;
+	u32 gpio2a_iomux;
+	u32 gpio2b_iomux;
+	u32 gpio2c_iomux;
+	u32 gpio2d_iomux;
+	u32 gpio3a_iomux;
+	u32 gpio3b_iomux;
+	u32 gpio3c_iomux;
+	u32 gpio3d_iomux;
+	u32 reserved[0x34];
+	u32 gpio1a_pull;
+	u32 gpio1b_pull;
+	u32 gpio1c_pull;
+	u32 gpio1d_pull;
+	u32 gpio2a_pull;
+	u32 gpio2b_pull;
+	u32 gpio2c_pull;
+	u32 gpio2d_pull;
+	u32 gpio3a_pull;
+	u32 gpio3b_pull;
+	u32 gpio3c_pull;
+	u32 gpio3d_pull;
+	u32 reserved1[0x34];
+	u32 gpio1a_drv;
+	u32 gpio1b_drv;
+	u32 gpio1c_drv;
+	u32 gpio1d_drv;
+	u32 gpio2a_drv;
+	u32 gpio2b_drv;
+	u32 gpio2c_drv;
+	u32 gpio2d_drv;
+	u32 gpio3a_drv;
+	u32 gpio3b_drv;
+	u32 gpio3c_drv;
+	u32 gpio3d_drv;
+	u32 reserved2[0x34];
+	u32 gpio1l_sr;
+	u32 gpio1h_sr;
+	u32 gpio2l_sr;
+	u32 gpio2h_sr;
+	u32 gpio3l_sr;
+	u32 gpio3h_sr;
+	u32 reserved3[0x1a];
+	u32 gpio_smt;
+	u32 reserved4[0x1f];
+	u32 soc_con0;
+	u32 soc_con1;
+	u32 soc_con2;
+	u32 soc_con3;
+	u32 soc_con4;
+	u32 soc_con5;
+	u32 soc_con6;
+	u32 soc_con7;
+	u32 soc_con8;
+	u32 soc_con9;
+	u32 soc_con10;
+	u32 soc_con11;
+	u32 soc_con12;
+	u32 soc_con13;
+	u32 soc_con14;
+	u32 soc_con15;
+	u32 soc_con16;
+	u32 soc_con17;
+};
+check_member(rk3368_grf, soc_con17, 0x444);
+
+struct rk3368_pmu_grf {
+	u32 gpio0a_iomux;
+	u32 gpio0b_iomux;
+	u32 gpio0c_iomux;
+	u32 gpio0d_iomux;
+	u32 gpio0a_pull;
+	u32 gpio0b_pull;
+	u32 gpio0c_pull;
+	u32 gpio0d_pull;
+	u32 gpio0a_drv;
+	u32 gpio0b_drv;
+	u32 gpio0c_drv;
+	u32 gpio0d_drv;
+	u32 gpio0l_sr;
+	u32 gpio0h_sr;
+};
+check_member(rk3368_pmu_grf, gpio0h_sr, 0x34);
+
+/*GRF_GPIO0C_IOMUX*/
+enum {
+	GPIO0C7_SHIFT		= 14,
+	GPIO0C7_MASK		= 3 << GPIO0C7_SHIFT,
+	GPIO0C7_GPIO		= 0,
+	GPIO0C7_LCDC_D19,
+	GPIO0C7_TRACE_D9,
+	GPIO0C7_UART1_RTSN,
+
+	GPIO0C6_SHIFT           = 12,
+	GPIO0C6_MASK            = 3 << GPIO0C6_SHIFT,
+	GPIO0C6_GPIO            = 0,
+	GPIO0C6_LCDC_D18,
+	GPIO0C6_TRACE_D8,
+	GPIO0C6_UART1_CTSN,
+
+	GPIO0C5_SHIFT           = 10,
+	GPIO0C5_MASK            = 3 << GPIO0C5_SHIFT,
+	GPIO0C5_GPIO            = 0,
+	GPIO0C5_LCDC_D17,
+	GPIO0C5_TRACE_D7,
+	GPIO0C5_UART1_SOUT,
+
+	GPIO0C4_SHIFT           = 8,
+	GPIO0C4_MASK            = 3 << GPIO0C4_SHIFT,
+	GPIO0C4_GPIO            = 0,
+	GPIO0C4_LCDC_D16,
+	GPIO0C4_TRACE_D6,
+	GPIO0C4_UART1_SIN,
+
+	GPIO0C3_SHIFT           = 6,
+	GPIO0C3_MASK            = 3 << GPIO0C3_SHIFT,
+	GPIO0C3_GPIO            = 0,
+	GPIO0C3_LCDC_D15,
+	GPIO0C3_TRACE_D5,
+	GPIO0C3_MCU_JTAG_TDO,
+
+	GPIO0C2_SHIFT           = 4,
+	GPIO0C2_MASK            = 3 << GPIO0C2_SHIFT,
+	GPIO0C2_GPIO            = 0,
+	GPIO0C2_LCDC_D14,
+	GPIO0C2_TRACE_D4,
+	GPIO0C2_MCU_JTAG_TDI,
+
+	GPIO0C1_SHIFT           = 2,
+	GPIO0C1_MASK            = 3 << GPIO0C1_SHIFT,
+	GPIO0C1_GPIO            = 0,
+	GPIO0C1_LCDC_D13,
+	GPIO0C1_TRACE_D3,
+	GPIO0C1_MCU_JTAG_TRTSN,
+
+	GPIO0C0_SHIFT           = 0,
+	GPIO0C0_MASK            = 3 << GPIO0C0_SHIFT,
+	GPIO0C0_GPIO            = 0,
+	GPIO0C0_LCDC_D12,
+	GPIO0C0_TRACE_D2,
+	GPIO0C0_MCU_JTAG_TDO,
+};
+
+/*GRF_GPIO0D_IOMUX*/
+enum {
+	GPIO0D7_SHIFT           = 14,
+	GPIO0D7_MASK            = 3 << GPIO0D7_SHIFT,
+	GPIO0D7_GPIO            = 0,
+	GPIO0D7_LCDC_DCLK,
+	GPIO0D7_TRACE_CTL,
+	GPIO0D7_PMU_DEBUG5,
+
+	GPIO0D6_SHIFT           = 12,
+	GPIO0D6_MASK            = 3 << GPIO0D6_SHIFT,
+	GPIO0D6_GPIO            = 0,
+	GPIO0D6_LCDC_DEN,
+	GPIO0D6_TRACE_CLK,
+	GPIO0D6_PMU_DEBUG4,
+
+	GPIO0D5_SHIFT           = 10,
+	GPIO0D5_MASK            = 3 << GPIO0D5_SHIFT,
+	GPIO0D5_GPIO            = 0,
+	GPIO0D5_LCDC_VSYNC,
+	GPIO0D5_TRACE_D15,
+	GPIO0D5_PMU_DEBUG3,
+
+	GPIO0D4_SHIFT           = 8,
+	GPIO0D4_MASK            = 3 << GPIO0D4_SHIFT,
+	GPIO0D4_GPIO            = 0,
+	GPIO0D4_LCDC_HSYNC,
+	GPIO0D4_TRACE_D14,
+	GPIO0D4_PMU_DEBUG2,
+
+	GPIO0D3_SHIFT           = 6,
+	GPIO0D3_MASK            = 3 << GPIO0D3_SHIFT,
+	GPIO0D3_GPIO            = 0,
+	GPIO0D3_LCDC_D23,
+	GPIO0D3_TRACE_D13,
+	GPIO0D3_UART4_SIN,
+
+	GPIO0D2_SHIFT           = 4,
+	GPIO0D2_MASK            = 3 << GPIO0D2_SHIFT,
+	GPIO0D2_GPIO            = 0,
+	GPIO0D2_LCDC_D22,
+	GPIO0D2_TRACE_D12,
+	GPIO0D2_UART4_SOUT,
+
+	GPIO0D1_SHIFT           = 2,
+	GPIO0D1_MASK            = 3 << GPIO0D1_SHIFT,
+	GPIO0D1_GPIO            = 0,
+	GPIO0D1_LCDC_D21,
+	GPIO0D1_TRACE_D11,
+	GPIO0D1_UART4_RTSN,
+
+	GPIO0D0_SHIFT           = 0,
+	GPIO0D0_MASK            = 3 << GPIO0D0_SHIFT,
+	GPIO0D0_GPIO            = 0,
+	GPIO0D0_LCDC_D20,
+	GPIO0D0_TRACE_D10,
+	GPIO0D0_UART4_CTSN,
+};
+
+/*GRF_GPIO2A_IOMUX*/
+enum {
+	GPIO2A7_SHIFT           = 14,
+	GPIO2A7_MASK            = 3 << GPIO2A7_SHIFT,
+	GPIO2A7_GPIO            = 0,
+	GPIO2A7_SDMMC0_D2,
+	GPIO2A7_JTAG_TCK,
+
+	GPIO2A6_SHIFT           = 12,
+	GPIO2A6_MASK            = 3 << GPIO2A6_SHIFT,
+	GPIO2A6_GPIO            = 0,
+	GPIO2A6_SDMMC0_D1,
+	GPIO2A6_UART2_SIN,
+
+	GPIO2A5_SHIFT           = 10,
+	GPIO2A5_MASK            = 3 << GPIO2A5_SHIFT,
+	GPIO2A5_GPIO            = 0,
+	GPIO2A5_SDMMC0_D0,
+	GPIO2A5_UART2_SOUT,
+
+	GPIO2A4_SHIFT           = 8,
+	GPIO2A4_MASK            = 3 << GPIO2A4_SHIFT,
+	GPIO2A4_GPIO            = 0,
+	GPIO2A4_FLASH_DQS,
+	GPIO2A4_EMMC_CLKO,
+
+	GPIO2A3_SHIFT           = 6,
+	GPIO2A3_MASK            = 3 << GPIO2A3_SHIFT,
+	GPIO2A3_GPIO            = 0,
+	GPIO2A3_FLASH_CSN3,
+	GPIO2A3_EMMC_RSTNO,
+
+	GPIO2A2_SHIFT           = 4,
+	GPIO2A2_MASK            = 3 << GPIO2A2_SHIFT,
+	GPIO2A2_GPIO           = 0,
+	GPIO2A2_FLASH_CSN2,
+
+	GPIO2A1_SHIFT           = 2,
+	GPIO2A1_MASK            = 3 << GPIO2A1_SHIFT,
+	GPIO2A1_GPIO            = 0,
+	GPIO2A1_FLASH_CSN1,
+
+	GPIO2A0_SHIFT           = 0,
+	GPIO2A0_MASK            = 3 << GPIO2A0_SHIFT,
+	GPIO2A0_GPIO            = 0,
+	GPIO2A0_FLASH_CSN0,
+};
+
+/*GRF_GPIO2D_IOMUX*/
+enum {
+	GPIO2D7_SHIFT           = 14,
+	GPIO2D7_MASK            = 3 << GPIO2D7_SHIFT,
+	GPIO2D7_GPIO            = 0,
+	GPIO2D7_SDIO0_D3,
+
+	GPIO2D6_SHIFT           = 12,
+	GPIO2D6_MASK            = 3 << GPIO2D6_SHIFT,
+	GPIO2D6_GPIO            = 0,
+	GPIO2D6_SDIO0_D2,
+
+	GPIO2D5_SHIFT           = 10,
+	GPIO2D5_MASK            = 3 << GPIO2D5_SHIFT,
+	GPIO2D5_GPIO            = 0,
+	GPIO2D5_SDIO0_D1,
+
+	GPIO2D4_SHIFT           = 8,
+	GPIO2D4_MASK            = 3 << GPIO2D4_SHIFT,
+	GPIO2D4_GPIO            = 0,
+	GPIO2D4_SDIO0_D0,
+
+	GPIO2D3_SHIFT           = 6,
+	GPIO2D3_MASK            = 3 << GPIO2D3_SHIFT,
+	GPIO2D3_GPIO            = 0,
+	GPIO2D3_UART0_RTS0,
+
+	GPIO2D2_SHIFT           = 4,
+	GPIO2D2_MASK            = 3 << GPIO2D2_SHIFT,
+	GPIO2D2_GPIO            = 0,
+	GPIO2D2_UART0_CTS0,
+
+	GPIO2D1_SHIFT           = 2,
+	GPIO2D1_MASK            = 3 << GPIO2D1_SHIFT,
+	GPIO2D1_GPIO            = 0,
+	GPIO2D1_UART0_SOUT,
+
+	GPIO2D0_SHIFT           = 0,
+	GPIO2D0_MASK            = 3 << GPIO2D0_SHIFT,
+	GPIO2D0_GPIO            = 0,
+	GPIO2D0_UART0_SIN,
+};
+
+/*GRF_GPIO3C_IOMUX*/
+enum {
+	GPIO3C7_SHIFT           = 14,
+	GPIO3C7_MASK            = 3 << GPIO3C7_SHIFT,
+	GPIO3C7_GPIO            = 0,
+	GPIO3C7_EDPHDMI_CECINOUT,
+	GPIO3C7_ISP_FLASHTRIGIN,
+
+	GPIO3C6_SHIFT           = 12,
+	GPIO3C6_MASK            = 3 << GPIO3C6_SHIFT,
+	GPIO3C6_GPIO            = 0,
+	GPIO3C6_MAC_CLK,
+	GPIO3C6_ISP_SHUTTERTRIG,
+
+	GPIO3C5_SHIFT           = 10,
+	GPIO3C5_MASK            = 3 << GPIO3C5_SHIFT,
+	GPIO3C5_GPIO            = 0,
+	GPIO3C5_MAC_RXER,
+	GPIO3C5_ISP_PRELIGHTTRIG,
+
+	GPIO3C4_SHIFT           = 8,
+	GPIO3C4_MASK            = 3 << GPIO3C4_SHIFT,
+	GPIO3C4_GPIO            = 0,
+	GPIO3C4_MAC_RXDV,
+	GPIO3C4_ISP_FLASHTRIGOUT,
+
+	GPIO3C3_SHIFT           = 6,
+	GPIO3C3_MASK            = 3 << GPIO3C3_SHIFT,
+	GPIO3C3_GPIO            = 0,
+	GPIO3C3_MAC_RXDV,
+	GPIO3C3_EMMC_RSTNO,
+
+	GPIO3C2_SHIFT           = 4,
+	GPIO3C2_MASK            = 3 << GPIO3C2_SHIFT,
+	GPIO3C2_MAC_MDC            = 0,
+	GPIO3C2_ISP_SHUTTEREN,
+
+	GPIO3C1_SHIFT           = 2,
+	GPIO3C1_MASK            = 3 << GPIO3C1_SHIFT,
+	GPIO3C1_GPIO            = 0,
+	GPIO3C1_MAC_RXD2,
+	GPIO3C1_UART3_RTSN,
+
+	GPIO3C0_SHIFT           = 0,
+	GPIO3C0_MASK            = 3 << GPIO3C0_SHIFT,
+	GPIO3C0_GPIO            = 0,
+	GPIO3C0_MAC_RXD1,
+	GPIO3C0_UART3_CTSN,
+	GPIO3C0_GPS_RFCLK,
+};
+
+/*GRF_GPIO3D_IOMUX*/
+enum {
+	GPIO3D7_SHIFT           = 14,
+	GPIO3D7_MASK            = 3 << GPIO3D7_SHIFT,
+	GPIO3D7_GPIO            = 0,
+	GPIO3D7_SC_VCC18V,
+	GPIO3D7_I2C2_SDA,
+	GPIO3D7_GPUJTAG_TCK,
+
+	GPIO3D6_SHIFT           = 12,
+	GPIO3D6_MASK            = 3 << GPIO3D6_SHIFT,
+	GPIO3D6_GPIO            = 0,
+	GPIO3D6_IR_TX,
+	GPIO3D6_UART3_SOUT,
+	GPIO3D6_PWM3,
+
+	GPIO3D5_SHIFT           = 10,
+	GPIO3D5_MASK            = 3 << GPIO3D5_SHIFT,
+	GPIO3D5_GPIO            = 0,
+	GPIO3D5_IR_RX,
+	GPIO3D5_UART3_SIN,
+
+	GPIO3D4_SHIFT           = 8,
+	GPIO3D4_MASK            = 3 << GPIO3D4_SHIFT,
+	GPIO3D4_GPIO            = 0,
+	GPIO3D4_MAC_TXCLKOUT,
+	GPIO3D4_SPI1_CSN1,
+
+	GPIO3D3_SHIFT           = 6,
+	GPIO3D3_MASK            = 3 << GPIO3D3_SHIFT,
+	GPIO3D3_GPIO            = 0,
+	GPIO3D3_HDMII2C_SCL,
+	GPIO3D3_I2C5_SCL,
+
+	GPIO3D2_SHIFT           = 4,
+	GPIO3D2_MASK            = 3 << GPIO3D2_SHIFT,
+	GPIO3D2_GPIO            = 0,
+	GPIO3D2_HDMII2C_SDA,
+	GPIO3D2_I2C5_SDA,
+
+	GPIO3D1_SHIFT           = 2,
+	GPIO3D1_MASK            = 3 << GPIO3D1_SHIFT,
+	GPIO3D1_GPIO            = 0,
+	GPIO3D1_MAC_RXCLKIN,
+	GPIO3D1_I2C4_SCL,
+
+	GPIO3D0_SHIFT           = 0,
+	GPIO3D0_MASK            = 3 << GPIO3D0_SHIFT,
+	GPIO3D0_GPIO            = 0,
+	GPIO3D0_MAC_MDIO,
+	GPIO3D0_I2C4_SDA,
+};
+
+/*GRF_SOC_CON11/12/13*/
+enum {
+	MCU_SRAM_BASE_BIT27_BIT12_SHIFT	= 0,
+	MCU_SRAM_BASE_BIT27_BIT12_MASK	= GENMASK(15, 0),
+};
+
+/*GRF_SOC_CON12*/
+enum {
+	MCU_EXSRAM_BASE_BIT27_BIT12_SHIFT  = 0,
+	MCU_EXSRAM_BASE_BIT27_BIT12_MASK   = GENMASK(15, 0),
+};
+
+/*GRF_SOC_CON13*/
+enum {
+	MCU_EXPERI_BASE_BIT27_BIT12_SHIFT  = 0,
+	MCU_EXPERI_BASE_BIT27_BIT12_MASK   = GENMASK(15, 0),
+};
+
+/*GRF_SOC_CON14*/
+enum {
+	MCU_EXPERI_BASE_BIT31_BIT28_SHIFT	= 12,
+	MCU_EXPERI_BASE_BIT31_BIT28_MASK	= GENMASK(15, 12),
+	MCU_EXSRAM_BASE_BIT31_BIT28_SHIFT	= 8,
+	MCU_EXSRAM_BASE_BIT31_BIT28_MASK	= GENMASK(11, 8),
+	MCU_SRAM_BASE_BIT31_BIT28_SHIFT		= 4,
+	MCU_SRAM_BASE_BIT31_BIT28_MASK		= GENMASK(7, 4),
+	MCU_CODE_BASE_BIT31_BIT28_SHIFT		= 0,
+	MCU_CODE_BASE_BIT31_BIT28_MASK		= GENMASK(3, 0),
+};
+#endif
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 9cea6f2..0d296bf 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -197,6 +197,16 @@ config PINCTRL_ROCKCHIP_RK3328
 	  the GPIO definitions and pin control functions for each available
 	  multiplex function.
 
+config PINCTRL_ROCKCHIP_RK3368
+	bool "Rockchip RK3368 pin control driver"
+	depends on DM
+	help
+	  Support pin multiplexing control on Rockchip rk3368 SoCs.
+
+	  The driver is controlled by a device tree node which contains both
+	  the GPIO definitions and pin control functions for each available
+	  multiplex function.
+
 config PINCTRL_ROCKCHIP_RK3399
 	bool "Rockchip rk3399 pin control driver"
 	depends on DM
diff --git a/drivers/pinctrl/rockchip/Makefile b/drivers/pinctrl/rockchip/Makefile
index 69eef4c..7b7c470 100644
--- a/drivers/pinctrl/rockchip/Makefile
+++ b/drivers/pinctrl/rockchip/Makefile
@@ -9,4 +9,5 @@ obj-$(CONFIG_PINCTRL_ROCKCHIP_RK3036) += pinctrl_rk3036.o
 obj-$(CONFIG_PINCTRL_ROCKCHIP_RK3188) += pinctrl_rk3188.o
 obj-$(CONFIG_PINCTRL_ROCKCHIP_RK3288) += pinctrl_rk3288.o
 obj-$(CONFIG_PINCTRL_ROCKCHIP_RK3328) += pinctrl_rk3328.o
+obj-$(CONFIG_PINCTRL_ROCKCHIP_RK3368) += pinctrl_rk3368.o
 obj-$(CONFIG_PINCTRL_ROCKCHIP_RK3399) += pinctrl_rk3399.o
diff --git a/drivers/pinctrl/rockchip/pinctrl_rk3368.c b/drivers/pinctrl/rockchip/pinctrl_rk3368.c
new file mode 100644
index 0000000..1239d99
--- /dev/null
+++ b/drivers/pinctrl/rockchip/pinctrl_rk3368.c
@@ -0,0 +1,149 @@
+/*
+ * (C) Copyright 2017 Rockchip Electronics Co., Ltd
+ * Author: Andy Yan <andy.yan@rock-chips.com>
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/grf_rk3368.h>
+#include <asm/arch/periph.h>
+#include <dm/pinctrl.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct rk3368_pinctrl_priv {
+	struct rk3368_grf *grf;
+	struct rk3368_pmu_grf *pmugrf;
+};
+
+static void pinctrl_rk3368_uart_config(struct rk3368_pinctrl_priv *priv,
+				       int uart_id)
+{
+	struct rk3368_grf *grf = priv->grf;
+	struct rk3368_pmu_grf *pmugrf = priv->pmugrf;
+
+	switch (uart_id) {
+	case PERIPH_ID_UART2:
+		rk_clrsetreg(&grf->gpio2a_iomux,
+			     GPIO2A6_MASK | GPIO2A5_MASK,
+			     GPIO2A6_UART2_SIN << GPIO2A6_SHIFT |
+			     GPIO2A5_UART2_SOUT << GPIO2A5_SHIFT);
+		break;
+	case PERIPH_ID_UART0:
+		break;
+	case PERIPH_ID_UART1:
+		break;
+	case PERIPH_ID_UART3:
+		break;
+	case PERIPH_ID_UART4:
+		rk_clrsetreg(&pmugrf->gpio0d_iomux,
+			     GPIO0D0_MASK | GPIO0D1_MASK |
+			     GPIO0D2_MASK | GPIO0D3_MASK,
+			     GPIO0D0_GPIO << GPIO0D0_SHIFT |
+			     GPIO0D1_GPIO << GPIO0D1_SHIFT |
+			     GPIO0D2_UART4_SOUT << GPIO0D2_SHIFT |
+			     GPIO0D3_UART4_SIN << GPIO0D3_SHIFT);
+		break;
+	default:
+		debug("uart id = %d iomux error!\n", uart_id);
+		break;
+	}
+}
+
+static int rk3368_pinctrl_request(struct udevice *dev, int func, int flags)
+{
+	struct rk3368_pinctrl_priv *priv = dev_get_priv(dev);
+
+	debug("%s: func=%d, flags=%x\n", __func__, func, flags);
+	switch (func) {
+	case PERIPH_ID_UART0:
+	case PERIPH_ID_UART1:
+	case PERIPH_ID_UART2:
+	case PERIPH_ID_UART3:
+	case PERIPH_ID_UART4:
+		pinctrl_rk3368_uart_config(priv, func);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int rk3368_pinctrl_get_periph_id(struct udevice *dev,
+					struct udevice *periph)
+{
+	u32 cell[3];
+	int ret;
+
+	ret = fdtdec_get_int_array(gd->fdt_blob, periph->of_offset,
+				   "interrupts", cell, ARRAY_SIZE(cell));
+	if (ret < 0)
+		return -EINVAL;
+
+	switch (cell[1]) {
+	case 59:
+		return PERIPH_ID_UART4;
+	case 58:
+		return PERIPH_ID_UART3;
+	case 57:
+		return PERIPH_ID_UART2;
+	case 56:
+		return PERIPH_ID_UART1;
+	case 55:
+		return PERIPH_ID_UART0;
+	}
+
+	return -ENOENT;
+}
+
+static int rk3368_pinctrl_set_state_simple(struct udevice *dev,
+					   struct udevice *periph)
+{
+	int func;
+
+	func = rk3368_pinctrl_get_periph_id(dev, periph);
+	if (func < 0)
+		return func;
+
+	return rk3368_pinctrl_request(dev, func, 0);
+}
+
+static struct pinctrl_ops rk3368_pinctrl_ops = {
+	.set_state_simple	= rk3368_pinctrl_set_state_simple,
+	.request	= rk3368_pinctrl_request,
+	.get_periph_id	= rk3368_pinctrl_get_periph_id,
+};
+
+static int rk3368_pinctrl_probe(struct udevice *dev)
+{
+	struct rk3368_pinctrl_priv *priv = dev_get_priv(dev);
+	int ret = 0;
+
+	priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+	priv->pmugrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUGRF);
+
+	debug("%s: grf=%p pmugrf:%p\n", __func__, priv->grf, priv->pmugrf);
+
+	return ret;
+}
+
+static const struct udevice_id rk3368_pinctrl_ids[] = {
+	{ .compatible = "rockchip,rk3368-pinctrl" },
+	{ }
+};
+
+U_BOOT_DRIVER(pinctrl_rk3368) = {
+	.name		= "rockchip_rk3368_pinctrl",
+	.id		= UCLASS_PINCTRL,
+	.of_match	= rk3368_pinctrl_ids,
+	.priv_auto_alloc_size = sizeof(struct rk3368_pinctrl_priv),
+	.ops		= &rk3368_pinctrl_ops,
+	.bind		= dm_scan_fdt_dev,
+	.probe		= rk3368_pinctrl_probe,
+};
-- 
2.7.4