xref: /linux/drivers/reset/reset-sky1.c (revision 31b43c079f9aa55754c20404a42bca9a49e01f60)

// SPDX-License-Identifier: GPL-2.0-only
/*
 *
 * CIX System Reset Controller (SRC) driver
 *
 * Author: Jerry Zhu <jerry.zhu@cixtech.com>
 */

#include <linux/delay.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset-controller.h>

#include <dt-bindings/reset/cix,sky1-system-control.h>
#include <dt-bindings/reset/cix,sky1-s5-system-control.h>

#define SKY1_RESET_SLEEP_MIN_US		50
#define SKY1_RESET_SLEEP_MAX_US		100

struct sky1_src_signal {
	unsigned int offset;
	unsigned int bit;
};

struct sky1_src_variant {
	const struct sky1_src_signal *signals;
	unsigned int signals_num;
};

struct sky1_src {
	struct reset_controller_dev rcdev;
	const struct sky1_src_signal *signals;
	struct regmap *regmap;
};

enum {
	CSU_PM_RESET				= 0x304,
	SENSORFUSION_RESET			= 0x308,
	SENSORFUSION_NOC_RESET			= 0x30c,
	RESET_GROUP0_S0_DOMAIN_0		= 0x400,
	RESET_GROUP0_S0_DOMAIN_1		= 0x404,
	RESET_GROUP1_USB_PHYS			= 0x408,
	RESET_GROUP1_USB_CONTROLLERS		= 0x40c,
	RESET_GROUP0_RCSU			= 0x800,
	RESET_GROUP1_RCSU			= 0x804,
};

static const struct sky1_src_signal sky1_src_signals[] = {
	/* reset group1 for s0 domain modules */
	[SKY1_CSU_PM_RESET_N]		= { CSU_PM_RESET, BIT(0) },
	[SKY1_SENSORFUSION_RESET_N]	= { SENSORFUSION_RESET, BIT(0) },
	[SKY1_SENSORFUSION_NOC_RESET_N]	= { SENSORFUSION_NOC_RESET, BIT(0) },
	[SKY1_DDRC_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(0) },
	[SKY1_GIC_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(1) },
	[SKY1_CI700_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(2) },
	[SKY1_SYS_NI700_RESET_N]	= { RESET_GROUP0_S0_DOMAIN_0, BIT(3) },
	[SKY1_MM_NI700_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(4) },
	[SKY1_PCIE_NI700_RESET_N]	= { RESET_GROUP0_S0_DOMAIN_0, BIT(5) },
	[SKY1_GPU_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(6) },
	[SKY1_NPUTOP_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(7) },
	[SKY1_NPUCORE0_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(8) },
	[SKY1_NPUCORE1_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(9) },
	[SKY1_NPUCORE2_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(10) },
	[SKY1_VPU_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(11) },
	[SKY1_ISP_SRESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(12) },
	[SKY1_ISP_ARESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(13) },
	[SKY1_ISP_HRESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(14) },
	[SKY1_ISP_GDCRESET_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(15) },
	[SKY1_DPU_RESET0_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(16) },
	[SKY1_DPU_RESET1_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(17) },
	[SKY1_DPU_RESET2_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(18) },
	[SKY1_DPU_RESET3_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(19) },
	[SKY1_DPU_RESET4_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(20) },
	[SKY1_DP_RESET0_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(21) },
	[SKY1_DP_RESET1_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(22) },
	[SKY1_DP_RESET2_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(23) },
	[SKY1_DP_RESET3_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(24) },
	[SKY1_DP_RESET4_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(25) },
	[SKY1_DP_PHY_RST_N]		= { RESET_GROUP0_S0_DOMAIN_0, BIT(26) },

	/* reset group1 for s0 domain modules */
	[SKY1_AUDIO_HIFI5_RESET_N]	= { RESET_GROUP0_S0_DOMAIN_1, BIT(0) },
	[SKY1_AUDIO_HIFI5_NOC_RESET_N]	= { RESET_GROUP0_S0_DOMAIN_1, BIT(1) },
	[SKY1_CSIDPHY_PRST0_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(2) },
	[SKY1_CSIDPHY_CMNRST0_N]	= { RESET_GROUP0_S0_DOMAIN_1, BIT(3) },
	[SKY1_CSI0_RST_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(4) },
	[SKY1_CSIDPHY_PRST1_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(5) },
	[SKY1_CSIDPHY_CMNRST1_N]	= { RESET_GROUP0_S0_DOMAIN_1, BIT(6) },
	[SKY1_CSI1_RST_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(7) },
	[SKY1_CSI2_RST_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(8) },
	[SKY1_CSI3_RST_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(9) },
	[SKY1_CSIBRDGE0_RST_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(10) },
	[SKY1_CSIBRDGE1_RST_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(11) },
	[SKY1_CSIBRDGE2_RST_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(12) },
	[SKY1_CSIBRDGE3_RST_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(13) },
	[SKY1_GMAC0_RST_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(14) },
	[SKY1_GMAC1_RST_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(15) },
	[SKY1_PCIE0_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(16) },
	[SKY1_PCIE1_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(17) },
	[SKY1_PCIE2_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(18) },
	[SKY1_PCIE3_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(19) },
	[SKY1_PCIE4_RESET_N]		= { RESET_GROUP0_S0_DOMAIN_1, BIT(20) },

	/* reset group1 for usb phys */
	[SKY1_USB_DP_PHY0_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(0) },
	[SKY1_USB_DP_PHY1_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(1) },
	[SKY1_USB_DP_PHY2_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(2) },
	[SKY1_USB_DP_PHY3_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(3) },
	[SKY1_USB_DP_PHY0_RST_N]		= { RESET_GROUP1_USB_PHYS, BIT(4) },
	[SKY1_USB_DP_PHY1_RST_N]		= { RESET_GROUP1_USB_PHYS, BIT(5) },
	[SKY1_USB_DP_PHY2_RST_N]		= { RESET_GROUP1_USB_PHYS, BIT(6) },
	[SKY1_USB_DP_PHY3_RST_N]		= { RESET_GROUP1_USB_PHYS, BIT(7) },
	[SKY1_USBPHY_SS_PST_N]			= { RESET_GROUP1_USB_PHYS, BIT(8) },
	[SKY1_USBPHY_SS_RST_N]			= { RESET_GROUP1_USB_PHYS, BIT(9) },
	[SKY1_USBPHY_HS0_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(10) },
	[SKY1_USBPHY_HS1_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(11) },
	[SKY1_USBPHY_HS2_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(12) },
	[SKY1_USBPHY_HS3_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(13) },
	[SKY1_USBPHY_HS4_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(14) },
	[SKY1_USBPHY_HS5_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(15) },
	[SKY1_USBPHY_HS6_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(16) },
	[SKY1_USBPHY_HS7_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(17) },
	[SKY1_USBPHY_HS8_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(18) },
	[SKY1_USBPHY_HS9_PRST_N]		= { RESET_GROUP1_USB_PHYS, BIT(19) },

	/* reset group1 for usb controllers */
	[SKY1_USBC_SS0_PRST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(0) },
	[SKY1_USBC_SS1_PRST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(1) },
	[SKY1_USBC_SS2_PRST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(2) },
	[SKY1_USBC_SS3_PRST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(3) },
	[SKY1_USBC_SS4_PRST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(4) },
	[SKY1_USBC_SS5_PRST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(5) },
	[SKY1_USBC_SS0_RST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(6) },
	[SKY1_USBC_SS1_RST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(7) },
	[SKY1_USBC_SS2_RST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(8) },
	[SKY1_USBC_SS3_RST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(9) },
	[SKY1_USBC_SS4_RST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(10) },
	[SKY1_USBC_SS5_RST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(11) },
	[SKY1_USBC_HS0_PRST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(12) },
	[SKY1_USBC_HS1_PRST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(13) },
	[SKY1_USBC_HS2_PRST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(14) },
	[SKY1_USBC_HS3_PRST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(15) },
	[SKY1_USBC_HS0_RST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(16) },
	[SKY1_USBC_HS1_RST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(17) },
	[SKY1_USBC_HS2_RST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(18) },
	[SKY1_USBC_HS3_RST_N]		= { RESET_GROUP1_USB_CONTROLLERS, BIT(19) },

	/* reset group0 for rcsu */
	[SKY1_AUDIO_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(0) },
	[SKY1_CI700_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(1) },
	[SKY1_CSI_RCSU0_RESET_N]		= { RESET_GROUP0_RCSU, BIT(2) },
	[SKY1_CSI_RCSU1_RESET_N]		= { RESET_GROUP0_RCSU, BIT(3) },
	[SKY1_CSU_PM_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(4) },
	[SKY1_DDR_BROADCAST_RCSU_RESET_N]	= { RESET_GROUP0_RCSU, BIT(5) },
	[SKY1_DDR_CTRL_RCSU_0_RESET_N]		= { RESET_GROUP0_RCSU, BIT(6) },
	[SKY1_DDR_CTRL_RCSU_1_RESET_N]		= { RESET_GROUP0_RCSU, BIT(7) },
	[SKY1_DDR_CTRL_RCSU_2_RESET_N]		= { RESET_GROUP0_RCSU, BIT(8) },
	[SKY1_DDR_CTRL_RCSU_3_RESET_N]		= { RESET_GROUP0_RCSU, BIT(9) },
	[SKY1_DDR_TZC400_RCSU_0_RESET_N]	= { RESET_GROUP0_RCSU, BIT(10) },
	[SKY1_DDR_TZC400_RCSU_1_RESET_N]	= { RESET_GROUP0_RCSU, BIT(11) },
	[SKY1_DDR_TZC400_RCSU_2_RESET_N]	= { RESET_GROUP0_RCSU, BIT(12) },
	[SKY1_DDR_TZC400_RCSU_3_RESET_N]	= { RESET_GROUP0_RCSU, BIT(13) },
	[SKY1_DP0_RCSU_RESET_N]			= { RESET_GROUP0_RCSU, BIT(14) },
	[SKY1_DP1_RCSU_RESET_N]			= { RESET_GROUP0_RCSU, BIT(15) },
	[SKY1_DP2_RCSU_RESET_N]			= { RESET_GROUP0_RCSU, BIT(16) },
	[SKY1_DP3_RCSU_RESET_N]			= { RESET_GROUP0_RCSU, BIT(17) },
	[SKY1_DP4_RCSU_RESET_N]			= { RESET_GROUP0_RCSU, BIT(18) },
	[SKY1_DPU0_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(19) },
	[SKY1_DPU1_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(20) },
	[SKY1_DPU2_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(21) },
	[SKY1_DPU3_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(22) },
	[SKY1_DPU4_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(23) },
	[SKY1_DSU_RCSU_RESET_N]			= { RESET_GROUP0_RCSU, BIT(24) },
	[SKY1_FCH_RCSU_RESET_N]			= { RESET_GROUP0_RCSU, BIT(25) },
	[SKY1_GICD_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(26) },
	[SKY1_GMAC_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(27) },
	[SKY1_GPU_RCSU_RESET_N]			= { RESET_GROUP0_RCSU, BIT(28) },
	[SKY1_ISP_RCSU0_RESET_N]		= { RESET_GROUP0_RCSU, BIT(29) },
	[SKY1_ISP_RCSU1_RESET_N]		= { RESET_GROUP0_RCSU, BIT(30) },
	[SKY1_NI700_MMHUB_RCSU_RESET_N]		= { RESET_GROUP0_RCSU, BIT(31) },

	/* reset group1 for rcsu */
	[SKY1_NPU_RCSU_RESET_N]			= { RESET_GROUP1_RCSU, BIT(0) },
	[SKY1_NI700_PCIE_RCSU_RESET_N]		= { RESET_GROUP1_RCSU, BIT(1) },
	[SKY1_PCIE_X421_RCSU_RESET_N]		= { RESET_GROUP1_RCSU, BIT(2) },
	[SKY1_PCIE_X8_RCSU_RESET_N]		= { RESET_GROUP1_RCSU, BIT(3) },
	[SKY1_SF_RCSU_RESET_N]			= { RESET_GROUP1_RCSU, BIT(4) },
	[SKY1_RCSU_SMMU_MMHUB_RESET_N]		= { RESET_GROUP1_RCSU, BIT(5) },
	[SKY1_RCSU_SMMU_PCIEHUB_RESET_N]	= { RESET_GROUP1_RCSU, BIT(6) },
	[SKY1_RCSU_SYSHUB_RESET_N]		= { RESET_GROUP1_RCSU, BIT(7) },
	[SKY1_NI700_SMN_RCSU_RESET_N]		= { RESET_GROUP1_RCSU, BIT(8) },
	[SKY1_NI700_SYSHUB_RCSU_RESET_N]	= { RESET_GROUP1_RCSU, BIT(9) },
	[SKY1_RCSU_USB2_HOST0_RESET_N]		= { RESET_GROUP1_RCSU, BIT(10) },
	[SKY1_RCSU_USB2_HOST1_RESET_N]		= { RESET_GROUP1_RCSU, BIT(11) },
	[SKY1_RCSU_USB2_HOST2_RESET_N]		= { RESET_GROUP1_RCSU, BIT(12) },
	[SKY1_RCSU_USB2_HOST3_RESET_N]		= { RESET_GROUP1_RCSU, BIT(13) },
	[SKY1_RCSU_USB3_TYPEA_DRD_RESET_N]	= { RESET_GROUP1_RCSU, BIT(14) },
	[SKY1_RCSU_USB3_TYPEC_DRD_RESET_N]	= { RESET_GROUP1_RCSU, BIT(15) },
	[SKY1_RCSU_USB3_TYPEC_HOST0_RESET_N]	= { RESET_GROUP1_RCSU, BIT(16) },
	[SKY1_RCSU_USB3_TYPEC_HOST1_RESET_N]	= { RESET_GROUP1_RCSU, BIT(17) },
	[SKY1_RCSU_USB3_TYPEC_HOST2_RESET_N]	= { RESET_GROUP1_RCSU, BIT(18) },
	[SKY1_VPU_RCSU_RESET_N]			= { RESET_GROUP1_RCSU, BIT(19) },
};

static const struct sky1_src_variant variant_sky1 = {
	.signals = sky1_src_signals,
	.signals_num = ARRAY_SIZE(sky1_src_signals),
};

enum {
	FCH_SW_RST_FUNC			= 0x8,
	FCH_SW_RST_BUS			= 0xc,
	FCH_SW_XSPI			= 0x10,
};

static const struct sky1_src_signal sky1_src_fch_signals[] = {
	/* resets for fch_sw_rst_func */
	[SW_I3C0_RST_FUNC_G_N]	= { FCH_SW_RST_FUNC, BIT(0) },
	[SW_I3C0_RST_FUNC_I_N]	= { FCH_SW_RST_FUNC, BIT(1) },
	[SW_I3C1_RST_FUNC_G_N]	= { FCH_SW_RST_FUNC, BIT(2) },
	[SW_I3C1_RST_FUNC_I_N]	= { FCH_SW_RST_FUNC, BIT(3) },
	[SW_UART0_RST_FUNC_N]	= { FCH_SW_RST_FUNC, BIT(4) },
	[SW_UART1_RST_FUNC_N]	= { FCH_SW_RST_FUNC, BIT(5) },
	[SW_UART2_RST_FUNC_N]	= { FCH_SW_RST_FUNC, BIT(6) },
	[SW_UART3_RST_FUNC_N]	= { FCH_SW_RST_FUNC, BIT(7) },
	[SW_TIMER_RST_FUNC_N]	= { FCH_SW_RST_FUNC, BIT(20) },

	/* resets for fch_sw_rst_bus */
	[SW_I3C0_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(0) },
	[SW_I3C1_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(1) },
	[SW_DMA_RST_AXI_N]	= { FCH_SW_RST_BUS, BIT(2) },
	[SW_UART0_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(4) },
	[SW_UART1_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(5) },
	[SW_UART2_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(6) },
	[SW_UART3_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(7) },
	[SW_SPI0_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(8) },
	[SW_SPI1_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(9) },
	[SW_I2C0_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(12) },
	[SW_I2C1_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(13) },
	[SW_I2C2_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(14) },
	[SW_I2C3_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(15) },
	[SW_I2C4_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(16) },
	[SW_I2C5_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(17) },
	[SW_I2C6_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(18) },
	[SW_I2C7_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(19) },
	[SW_GPIO_RST_APB_N]	= { FCH_SW_RST_BUS, BIT(21) },

	/* resets for fch_sw_xspi */
	[SW_XSPI_REG_RST_N]	= { FCH_SW_XSPI, BIT(0) },
	[SW_XSPI_SYS_RST_N]	= { FCH_SW_XSPI, BIT(1) },
};

static const struct sky1_src_variant variant_sky1_fch = {
	.signals = sky1_src_fch_signals,
	.signals_num = ARRAY_SIZE(sky1_src_fch_signals),
};

static struct sky1_src *to_sky1_src(struct reset_controller_dev *rcdev)
{
	return container_of(rcdev, struct sky1_src, rcdev);
}

static int sky1_reset_set(struct reset_controller_dev *rcdev,
			  unsigned long id, bool assert)
{
	struct sky1_src *sky1src = to_sky1_src(rcdev);
	const struct sky1_src_signal *signal = &sky1src->signals[id];
	unsigned int value = assert ? 0 : signal->bit;

	return regmap_update_bits(sky1src->regmap,
				  signal->offset, signal->bit, value);
}

static int sky1_reset_assert(struct reset_controller_dev *rcdev,
			     unsigned long id)
{
	sky1_reset_set(rcdev, id, true);
	usleep_range(SKY1_RESET_SLEEP_MIN_US,
		     SKY1_RESET_SLEEP_MAX_US);
	return 0;
}

static int sky1_reset_deassert(struct reset_controller_dev *rcdev,
			       unsigned long id)
{
	sky1_reset_set(rcdev, id, false);
	usleep_range(SKY1_RESET_SLEEP_MIN_US,
		     SKY1_RESET_SLEEP_MAX_US);
	return 0;
}

static int sky1_reset(struct reset_controller_dev *rcdev,
		      unsigned long id)
{
	sky1_reset_assert(rcdev, id);
	sky1_reset_deassert(rcdev, id);
	return 0;
}

static int sky1_reset_status(struct reset_controller_dev *rcdev,
			     unsigned long id)
{
	unsigned int value = 0;
	struct sky1_src *sky1src = to_sky1_src(rcdev);
	const struct sky1_src_signal *signal = &sky1src->signals[id];

	regmap_read(sky1src->regmap, signal->offset, &value);
	return !(value & signal->bit);
}

static const struct reset_control_ops sky1_src_ops = {
	.reset    = sky1_reset,
	.assert   = sky1_reset_assert,
	.deassert = sky1_reset_deassert,
	.status   = sky1_reset_status
};

static int sky1_reset_probe(struct platform_device *pdev)
{
	struct sky1_src *sky1src;
	struct device *dev = &pdev->dev;
	const struct sky1_src_variant *variant;

	sky1src = devm_kzalloc(dev, sizeof(*sky1src), GFP_KERNEL);
	if (!sky1src)
		return -ENOMEM;

	variant = of_device_get_match_data(dev);

	sky1src->regmap = device_node_to_regmap(dev->of_node);
	if (IS_ERR(sky1src->regmap)) {
		return dev_err_probe(dev, PTR_ERR(sky1src->regmap),
				     "Unable to get sky1-src regmap");
	}

	sky1src->signals = variant->signals;
	sky1src->rcdev.owner     = THIS_MODULE;
	sky1src->rcdev.nr_resets = variant->signals_num;
	sky1src->rcdev.ops       = &sky1_src_ops;
	sky1src->rcdev.of_node   = dev->of_node;
	sky1src->rcdev.dev       = dev;

	return devm_reset_controller_register(dev, &sky1src->rcdev);
}

static const struct of_device_id sky1_sysreg_of_match[] = {
	{ .compatible = "cix,sky1-system-control", .data = &variant_sky1_fch},
	{ .compatible = "cix,sky1-s5-system-control", .data = &variant_sky1},
	{},
};
MODULE_DEVICE_TABLE(of, sky1_sysreg_of_match);

static struct platform_driver sky1_reset_driver = {
	.probe	= sky1_reset_probe,
	.driver = {
		.name		= "cix,sky1-rst",
		.of_match_table = sky1_sysreg_of_match,
	},
};
module_platform_driver(sky1_reset_driver)

MODULE_AUTHOR("Jerry Zhu <jerry.zhu@cixtech.com>");
MODULE_DESCRIPTION("Cix Sky1 reset driver");
MODULE_LICENSE("GPL");