Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1238 insertions, 0 deletions

diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
new file mode 100644
index 0000000000..9fa005965f
--- /dev/null
+++ b/drivers/ata/ahci_imx.c
@@ -0,0 +1,1238 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * copyright (c) 2013 Freescale Semiconductor, Inc.
+ * Freescale IMX AHCI SATA platform driver
+ *
+ * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/ahci_platform.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
+#include <linux/libata.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/thermal.h>
+#include "ahci.h"
+
+#define DRV_NAME "ahci-imx"
+
+enum {
+	/* Timer 1-ms Register */
+	IMX_TIMER1MS				= 0x00e0,
+	/* Port0 PHY Control Register */
+	IMX_P0PHYCR				= 0x0178,
+	IMX_P0PHYCR_TEST_PDDQ			= 1 << 20,
+	IMX_P0PHYCR_CR_READ			= 1 << 19,
+	IMX_P0PHYCR_CR_WRITE			= 1 << 18,
+	IMX_P0PHYCR_CR_CAP_DATA			= 1 << 17,
+	IMX_P0PHYCR_CR_CAP_ADDR			= 1 << 16,
+	/* Port0 PHY Status Register */
+	IMX_P0PHYSR				= 0x017c,
+	IMX_P0PHYSR_CR_ACK			= 1 << 18,
+	IMX_P0PHYSR_CR_DATA_OUT			= 0xffff << 0,
+	/* Lane0 Output Status Register */
+	IMX_LANE0_OUT_STAT			= 0x2003,
+	IMX_LANE0_OUT_STAT_RX_PLL_STATE		= 1 << 1,
+	/* Clock Reset Register */
+	IMX_CLOCK_RESET				= 0x7f3f,
+	IMX_CLOCK_RESET_RESET			= 1 << 0,
+	/* IMX8QM HSIO AHCI definitions */
+	IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET	= 0x03,
+	IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET	= 0x09,
+	IMX8QM_SATA_PHY_IMPED_RATIO_85OHM	= 0x6c,
+	IMX8QM_LPCG_PHYX2_OFFSET		= 0x00000,
+	IMX8QM_CSR_PHYX2_OFFSET			= 0x90000,
+	IMX8QM_CSR_PHYX1_OFFSET			= 0xa0000,
+	IMX8QM_CSR_PHYX_STTS0_OFFSET		= 0x4,
+	IMX8QM_CSR_PCIEA_OFFSET			= 0xb0000,
+	IMX8QM_CSR_PCIEB_OFFSET			= 0xc0000,
+	IMX8QM_CSR_SATA_OFFSET			= 0xd0000,
+	IMX8QM_CSR_PCIE_CTRL2_OFFSET		= 0x8,
+	IMX8QM_CSR_MISC_OFFSET			= 0xe0000,
+
+	IMX8QM_LPCG_PHYX2_PCLK0_MASK		= (0x3 << 16),
+	IMX8QM_LPCG_PHYX2_PCLK1_MASK		= (0x3 << 20),
+	IMX8QM_PHY_APB_RSTN_0			= BIT(0),
+	IMX8QM_PHY_MODE_SATA			= BIT(19),
+	IMX8QM_PHY_MODE_MASK			= (0xf << 17),
+	IMX8QM_PHY_PIPE_RSTN_0			= BIT(24),
+	IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0		= BIT(25),
+	IMX8QM_PHY_PIPE_RSTN_1			= BIT(26),
+	IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1		= BIT(27),
+	IMX8QM_STTS0_LANE0_TX_PLL_LOCK		= BIT(4),
+	IMX8QM_MISC_IOB_RXENA			= BIT(0),
+	IMX8QM_MISC_IOB_TXENA			= BIT(1),
+	IMX8QM_MISC_PHYX1_EPCS_SEL		= BIT(12),
+	IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1	= BIT(24),
+	IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0	= BIT(25),
+	IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1	= BIT(28),
+	IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0	= BIT(29),
+	IMX8QM_SATA_CTRL_RESET_N		= BIT(12),
+	IMX8QM_SATA_CTRL_EPCS_PHYRESET_N	= BIT(7),
+	IMX8QM_CTRL_BUTTON_RST_N		= BIT(21),
+	IMX8QM_CTRL_POWER_UP_RST_N		= BIT(23),
+	IMX8QM_CTRL_LTSSM_ENABLE		= BIT(4),
+};
+
+enum ahci_imx_type {
+	AHCI_IMX53,
+	AHCI_IMX6Q,
+	AHCI_IMX6QP,
+	AHCI_IMX8QM,
+};
+
+struct imx_ahci_priv {
+	struct platform_device *ahci_pdev;
+	enum ahci_imx_type type;
+	struct clk *sata_clk;
+	struct clk *sata_ref_clk;
+	struct clk *ahb_clk;
+	struct clk *epcs_tx_clk;
+	struct clk *epcs_rx_clk;
+	struct clk *phy_apbclk;
+	struct clk *phy_pclk0;
+	struct clk *phy_pclk1;
+	void __iomem *phy_base;
+	struct gpio_desc *clkreq_gpiod;
+	struct regmap *gpr;
+	bool no_device;
+	bool first_time;
+	u32 phy_params;
+	u32 imped_ratio;
+};
+
+static int ahci_imx_hotplug;
+module_param_named(hotplug, ahci_imx_hotplug, int, 0644);
+MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)");
+
+static void ahci_imx_host_stop(struct ata_host *host);
+
+static int imx_phy_crbit_assert(void __iomem *mmio, u32 bit, bool assert)
+{
+	int timeout = 10;
+	u32 crval;
+	u32 srval;
+
+	/* Assert or deassert the bit */
+	crval = readl(mmio + IMX_P0PHYCR);
+	if (assert)
+		crval |= bit;
+	else
+		crval &= ~bit;
+	writel(crval, mmio + IMX_P0PHYCR);
+
+	/* Wait for the cr_ack signal */
+	do {
+		srval = readl(mmio + IMX_P0PHYSR);
+		if ((assert ? srval : ~srval) & IMX_P0PHYSR_CR_ACK)
+			break;
+		usleep_range(100, 200);
+	} while (--timeout);
+
+	return timeout ? 0 : -ETIMEDOUT;
+}
+
+static int imx_phy_reg_addressing(u16 addr, void __iomem *mmio)
+{
+	u32 crval = addr;
+	int ret;
+
+	/* Supply the address on cr_data_in */
+	writel(crval, mmio + IMX_P0PHYCR);
+
+	/* Assert the cr_cap_addr signal */
+	ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, true);
+	if (ret)
+		return ret;
+
+	/* Deassert cr_cap_addr */
+	ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, false);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int imx_phy_reg_write(u16 val, void __iomem *mmio)
+{
+	u32 crval = val;
+	int ret;
+
+	/* Supply the data on cr_data_in */
+	writel(crval, mmio + IMX_P0PHYCR);
+
+	/* Assert the cr_cap_data signal */
+	ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, true);
+	if (ret)
+		return ret;
+
+	/* Deassert cr_cap_data */
+	ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, false);
+	if (ret)
+		return ret;
+
+	if (val & IMX_CLOCK_RESET_RESET) {
+		/*
+		 * In case we're resetting the phy, it's unable to acknowledge,
+		 * so we return immediately here.
+		 */
+		crval |= IMX_P0PHYCR_CR_WRITE;
+		writel(crval, mmio + IMX_P0PHYCR);
+		goto out;
+	}
+
+	/* Assert the cr_write signal */
+	ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, true);
+	if (ret)
+		return ret;
+
+	/* Deassert cr_write */
+	ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, false);
+	if (ret)
+		return ret;
+
+out:
+	return 0;
+}
+
+static int imx_phy_reg_read(u16 *val, void __iomem *mmio)
+{
+	int ret;
+
+	/* Assert the cr_read signal */
+	ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, true);
+	if (ret)
+		return ret;
+
+	/* Capture the data from cr_data_out[] */
+	*val = readl(mmio + IMX_P0PHYSR) & IMX_P0PHYSR_CR_DATA_OUT;
+
+	/* Deassert cr_read */
+	ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, false);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int imx_sata_phy_reset(struct ahci_host_priv *hpriv)
+{
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
+	void __iomem *mmio = hpriv->mmio;
+	int timeout = 10;
+	u16 val;
+	int ret;
+
+	if (imxpriv->type == AHCI_IMX6QP) {
+		/* 6qp adds the sata reset mechanism, use it for 6qp sata */
+		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
+				   IMX6Q_GPR5_SATA_SW_PD, 0);
+
+		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
+				   IMX6Q_GPR5_SATA_SW_RST, 0);
+		udelay(50);
+		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
+				   IMX6Q_GPR5_SATA_SW_RST,
+				   IMX6Q_GPR5_SATA_SW_RST);
+		return 0;
+	}
+
+	/* Reset SATA PHY by setting RESET bit of PHY register CLOCK_RESET */
+	ret = imx_phy_reg_addressing(IMX_CLOCK_RESET, mmio);
+	if (ret)
+		return ret;
+	ret = imx_phy_reg_write(IMX_CLOCK_RESET_RESET, mmio);
+	if (ret)
+		return ret;
+
+	/* Wait for PHY RX_PLL to be stable */
+	do {
+		usleep_range(100, 200);
+		ret = imx_phy_reg_addressing(IMX_LANE0_OUT_STAT, mmio);
+		if (ret)
+			return ret;
+		ret = imx_phy_reg_read(&val, mmio);
+		if (ret)
+			return ret;
+		if (val & IMX_LANE0_OUT_STAT_RX_PLL_STATE)
+			break;
+	} while (--timeout);
+
+	return timeout ? 0 : -ETIMEDOUT;
+}
+
+enum {
+	/* SATA PHY Register */
+	SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT = 0x0001,
+	SATA_PHY_CR_CLOCK_DAC_CTL = 0x0008,
+	SATA_PHY_CR_CLOCK_RTUNE_CTL = 0x0009,
+	SATA_PHY_CR_CLOCK_ADC_OUT = 0x000A,
+	SATA_PHY_CR_CLOCK_MPLL_TST = 0x0017,
+};
+
+static int read_adc_sum(void *dev, u16 rtune_ctl_reg, void __iomem * mmio)
+{
+	u16 adc_out_reg, read_sum;
+	u32 index, read_attempt;
+	const u32 attempt_limit = 200;
+
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio);
+	imx_phy_reg_write(rtune_ctl_reg, mmio);
+
+	/* two dummy read */
+	index = 0;
+	read_attempt = 0;
+	adc_out_reg = 0;
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_ADC_OUT, mmio);
+	while (index < 2) {
+		imx_phy_reg_read(&adc_out_reg, mmio);
+		/* check if valid */
+		if (adc_out_reg & 0x400)
+			index++;
+
+		read_attempt++;
+		if (read_attempt > attempt_limit) {
+			dev_err(dev, "Read REG more than %d times!\n",
+				attempt_limit);
+			break;
+		}
+	}
+
+	index = 0;
+	read_attempt = 0;
+	read_sum = 0;
+	while (index < 80) {
+		imx_phy_reg_read(&adc_out_reg, mmio);
+		if (adc_out_reg & 0x400) {
+			read_sum = read_sum + (adc_out_reg & 0x3FF);
+			index++;
+		}
+		read_attempt++;
+		if (read_attempt > attempt_limit) {
+			dev_err(dev, "Read REG more than %d times!\n",
+				attempt_limit);
+			break;
+		}
+	}
+
+	/* Use the U32 to make 1000 precision */
+	return (read_sum * 1000) / 80;
+}
+
+/* SATA AHCI temperature monitor */
+static int __sata_ahci_read_temperature(void *dev, int *temp)
+{
+	u16 mpll_test_reg, rtune_ctl_reg, dac_ctl_reg, read_sum;
+	u32 str1, str2, str3, str4;
+	int m1, m2, a;
+	struct ahci_host_priv *hpriv = dev_get_drvdata(dev);
+	void __iomem *mmio = hpriv->mmio;
+
+	/* check rd-wr to reg */
+	read_sum = 0;
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_CRCMP_LT_LIMIT, mmio);
+	imx_phy_reg_write(read_sum, mmio);
+	imx_phy_reg_read(&read_sum, mmio);
+	if ((read_sum & 0xffff) != 0)
+		dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum);
+
+	imx_phy_reg_write(0x5A5A, mmio);
+	imx_phy_reg_read(&read_sum, mmio);
+	if ((read_sum & 0xffff) != 0x5A5A)
+		dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum);
+
+	imx_phy_reg_write(0x1234, mmio);
+	imx_phy_reg_read(&read_sum, mmio);
+	if ((read_sum & 0xffff) != 0x1234)
+		dev_err(dev, "Read/Write REG error, 0x%x!\n", read_sum);
+
+	/* start temperature test */
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio);
+	imx_phy_reg_read(&mpll_test_reg, mmio);
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio);
+	imx_phy_reg_read(&rtune_ctl_reg, mmio);
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio);
+	imx_phy_reg_read(&dac_ctl_reg, mmio);
+
+	/* mpll_tst.meas_iv   ([12:2]) */
+	str1 = (mpll_test_reg >> 2) & 0x7FF;
+	/* rtune_ctl.mode     ([1:0]) */
+	str2 = (rtune_ctl_reg) & 0x3;
+	/* dac_ctl.dac_mode   ([14:12]) */
+	str3 = (dac_ctl_reg >> 12)  & 0x7;
+	/* rtune_ctl.sel_atbp ([4]) */
+	str4 = (rtune_ctl_reg >> 4);
+
+	/* Calculate the m1 */
+	/* mpll_tst.meas_iv */
+	mpll_test_reg = (mpll_test_reg & 0xE03) | (512) << 2;
+	/* rtune_ctl.mode */
+	rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (1);
+	/* dac_ctl.dac_mode */
+	dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (4) << 12;
+	/* rtune_ctl.sel_atbp */
+	rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (0) << 4;
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio);
+	imx_phy_reg_write(mpll_test_reg, mmio);
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio);
+	imx_phy_reg_write(dac_ctl_reg, mmio);
+	m1 = read_adc_sum(dev, rtune_ctl_reg, mmio);
+
+	/* Calculate the m2 */
+	/* rtune_ctl.sel_atbp */
+	rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (1) << 4;
+	m2 = read_adc_sum(dev, rtune_ctl_reg, mmio);
+
+	/* restore the status  */
+	/* mpll_tst.meas_iv */
+	mpll_test_reg = (mpll_test_reg & 0xE03) | (str1) << 2;
+	/* rtune_ctl.mode */
+	rtune_ctl_reg = (rtune_ctl_reg & 0xFFC) | (str2);
+	/* dac_ctl.dac_mode */
+	dac_ctl_reg = (dac_ctl_reg & 0x8FF) | (str3) << 12;
+	/* rtune_ctl.sel_atbp */
+	rtune_ctl_reg = (rtune_ctl_reg & 0xFEF) | (str4) << 4;
+
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_MPLL_TST, mmio);
+	imx_phy_reg_write(mpll_test_reg, mmio);
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_DAC_CTL, mmio);
+	imx_phy_reg_write(dac_ctl_reg, mmio);
+	imx_phy_reg_addressing(SATA_PHY_CR_CLOCK_RTUNE_CTL, mmio);
+	imx_phy_reg_write(rtune_ctl_reg, mmio);
+
+	/* Compute temperature */
+	if (!(m2 / 1000))
+		m2 = 1000;
+	a = (m2 - m1) / (m2/1000);
+	*temp = ((-559) * a * a) / 1000 + (1379) * a + (-458000);
+
+	return 0;
+}
+
+static int sata_ahci_read_temperature(struct thermal_zone_device *tz, int *temp)
+{
+	return __sata_ahci_read_temperature(thermal_zone_device_priv(tz), temp);
+}
+
+static ssize_t sata_ahci_show_temp(struct device *dev,
+				   struct device_attribute *da,
+				   char *buf)
+{
+	unsigned int temp = 0;
+	int err;
+
+	err = __sata_ahci_read_temperature(dev, &temp);
+	if (err < 0)
+		return err;
+
+	return sprintf(buf, "%u\n", temp);
+}
+
+static const struct thermal_zone_device_ops fsl_sata_ahci_of_thermal_ops = {
+	.get_temp = sata_ahci_read_temperature,
+};
+
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, sata_ahci_show_temp, NULL, 0);
+
+static struct attribute *fsl_sata_ahci_attrs[] = {
+	&sensor_dev_attr_temp1_input.dev_attr.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(fsl_sata_ahci);
+
+static int imx8_sata_enable(struct ahci_host_priv *hpriv)
+{
+	u32 val, reg;
+	int i, ret;
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
+	struct device *dev = &imxpriv->ahci_pdev->dev;
+
+	/* configure the hsio for sata */
+	ret = clk_prepare_enable(imxpriv->phy_pclk0);
+	if (ret < 0) {
+		dev_err(dev, "can't enable phy_pclk0.\n");
+		return ret;
+	}
+	ret = clk_prepare_enable(imxpriv->phy_pclk1);
+	if (ret < 0) {
+		dev_err(dev, "can't enable phy_pclk1.\n");
+		goto disable_phy_pclk0;
+	}
+	ret = clk_prepare_enable(imxpriv->epcs_tx_clk);
+	if (ret < 0) {
+		dev_err(dev, "can't enable epcs_tx_clk.\n");
+		goto disable_phy_pclk1;
+	}
+	ret = clk_prepare_enable(imxpriv->epcs_rx_clk);
+	if (ret < 0) {
+		dev_err(dev, "can't enable epcs_rx_clk.\n");
+		goto disable_epcs_tx_clk;
+	}
+	ret = clk_prepare_enable(imxpriv->phy_apbclk);
+	if (ret < 0) {
+		dev_err(dev, "can't enable phy_apbclk.\n");
+		goto disable_epcs_rx_clk;
+	}
+	/* Configure PHYx2 PIPE_RSTN */
+	regmap_read(imxpriv->gpr, IMX8QM_CSR_PCIEA_OFFSET +
+			IMX8QM_CSR_PCIE_CTRL2_OFFSET, &val);
+	if ((val & IMX8QM_CTRL_LTSSM_ENABLE) == 0) {
+		/* The link of the PCIEA of HSIO is down */
+		regmap_update_bits(imxpriv->gpr,
+				IMX8QM_CSR_PHYX2_OFFSET,
+				IMX8QM_PHY_PIPE_RSTN_0 |
+				IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0,
+				IMX8QM_PHY_PIPE_RSTN_0 |
+				IMX8QM_PHY_PIPE_RSTN_OVERRIDE_0);
+	}
+	regmap_read(imxpriv->gpr, IMX8QM_CSR_PCIEB_OFFSET +
+			IMX8QM_CSR_PCIE_CTRL2_OFFSET, &reg);
+	if ((reg & IMX8QM_CTRL_LTSSM_ENABLE) == 0) {
+		/* The link of the PCIEB of HSIO is down */
+		regmap_update_bits(imxpriv->gpr,
+				IMX8QM_CSR_PHYX2_OFFSET,
+				IMX8QM_PHY_PIPE_RSTN_1 |
+				IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1,
+				IMX8QM_PHY_PIPE_RSTN_1 |
+				IMX8QM_PHY_PIPE_RSTN_OVERRIDE_1);
+	}
+	if (((reg | val) & IMX8QM_CTRL_LTSSM_ENABLE) == 0) {
+		/* The links of both PCIA and PCIEB of HSIO are down */
+		regmap_update_bits(imxpriv->gpr,
+				IMX8QM_LPCG_PHYX2_OFFSET,
+				IMX8QM_LPCG_PHYX2_PCLK0_MASK |
+				IMX8QM_LPCG_PHYX2_PCLK1_MASK,
+				0);
+	}
+
+	/* set PWR_RST and BT_RST of csr_pciea */
+	val = IMX8QM_CSR_PCIEA_OFFSET + IMX8QM_CSR_PCIE_CTRL2_OFFSET;
+	regmap_update_bits(imxpriv->gpr,
+			val,
+			IMX8QM_CTRL_BUTTON_RST_N,
+			IMX8QM_CTRL_BUTTON_RST_N);
+	regmap_update_bits(imxpriv->gpr,
+			val,
+			IMX8QM_CTRL_POWER_UP_RST_N,
+			IMX8QM_CTRL_POWER_UP_RST_N);
+
+	/* PHYX1_MODE to SATA */
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_PHYX1_OFFSET,
+			IMX8QM_PHY_MODE_MASK,
+			IMX8QM_PHY_MODE_SATA);
+
+	/*
+	 * BIT0 RXENA 1, BIT1 TXENA 0
+	 * BIT12 PHY_X1_EPCS_SEL 1.
+	 */
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_MISC_OFFSET,
+			IMX8QM_MISC_IOB_RXENA,
+			IMX8QM_MISC_IOB_RXENA);
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_MISC_OFFSET,
+			IMX8QM_MISC_IOB_TXENA,
+			0);
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_MISC_OFFSET,
+			IMX8QM_MISC_PHYX1_EPCS_SEL,
+			IMX8QM_MISC_PHYX1_EPCS_SEL);
+	/*
+	 * It is possible, for PCIe and SATA are sharing
+	 * the same clock source, HPLL or external oscillator.
+	 * When PCIe is in low power modes (L1.X or L2 etc),
+	 * the clock source can be turned off. In this case,
+	 * if this clock source is required to be toggling by
+	 * SATA, then SATA functions will be abnormal.
+	 * Set the override here to avoid it.
+	 */
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_MISC_OFFSET,
+			IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 |
+			IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 |
+			IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 |
+			IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0,
+			IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_1 |
+			IMX8QM_MISC_CLKREQN_OUT_OVERRIDE_0 |
+			IMX8QM_MISC_CLKREQN_IN_OVERRIDE_1 |
+			IMX8QM_MISC_CLKREQN_IN_OVERRIDE_0);
+
+	/* clear PHY RST, then set it */
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_SATA_OFFSET,
+			IMX8QM_SATA_CTRL_EPCS_PHYRESET_N,
+			0);
+
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_SATA_OFFSET,
+			IMX8QM_SATA_CTRL_EPCS_PHYRESET_N,
+			IMX8QM_SATA_CTRL_EPCS_PHYRESET_N);
+
+	/* CTRL RST: SET -> delay 1 us -> CLEAR -> SET */
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_SATA_OFFSET,
+			IMX8QM_SATA_CTRL_RESET_N,
+			IMX8QM_SATA_CTRL_RESET_N);
+	udelay(1);
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_SATA_OFFSET,
+			IMX8QM_SATA_CTRL_RESET_N,
+			0);
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_SATA_OFFSET,
+			IMX8QM_SATA_CTRL_RESET_N,
+			IMX8QM_SATA_CTRL_RESET_N);
+
+	/* APB reset */
+	regmap_update_bits(imxpriv->gpr,
+			IMX8QM_CSR_PHYX1_OFFSET,
+			IMX8QM_PHY_APB_RSTN_0,
+			IMX8QM_PHY_APB_RSTN_0);
+
+	for (i = 0; i < 100; i++) {
+		reg = IMX8QM_CSR_PHYX1_OFFSET +
+			IMX8QM_CSR_PHYX_STTS0_OFFSET;
+		regmap_read(imxpriv->gpr, reg, &val);
+		val &= IMX8QM_STTS0_LANE0_TX_PLL_LOCK;
+		if (val == IMX8QM_STTS0_LANE0_TX_PLL_LOCK)
+			break;
+		udelay(1);
+	}
+
+	if (val != IMX8QM_STTS0_LANE0_TX_PLL_LOCK) {
+		dev_err(dev, "TX PLL of the PHY is not locked\n");
+		ret = -ENODEV;
+	} else {
+		writeb(imxpriv->imped_ratio, imxpriv->phy_base +
+				IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET);
+		writeb(imxpriv->imped_ratio, imxpriv->phy_base +
+				IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET);
+		reg = readb(imxpriv->phy_base +
+				IMX8QM_SATA_PHY_RX_IMPED_RATIO_OFFSET);
+		if (unlikely(reg != imxpriv->imped_ratio))
+			dev_info(dev, "Can't set PHY RX impedance ratio.\n");
+		reg = readb(imxpriv->phy_base +
+				IMX8QM_SATA_PHY_TX_IMPED_RATIO_OFFSET);
+		if (unlikely(reg != imxpriv->imped_ratio))
+			dev_info(dev, "Can't set PHY TX impedance ratio.\n");
+		usleep_range(50, 100);
+
+		/*
+		 * To reduce the power consumption, gate off
+		 * the PHY clks
+		 */
+		clk_disable_unprepare(imxpriv->phy_apbclk);
+		clk_disable_unprepare(imxpriv->phy_pclk1);
+		clk_disable_unprepare(imxpriv->phy_pclk0);
+		return ret;
+	}
+
+	clk_disable_unprepare(imxpriv->phy_apbclk);
+disable_epcs_rx_clk:
+	clk_disable_unprepare(imxpriv->epcs_rx_clk);
+disable_epcs_tx_clk:
+	clk_disable_unprepare(imxpriv->epcs_tx_clk);
+disable_phy_pclk1:
+	clk_disable_unprepare(imxpriv->phy_pclk1);
+disable_phy_pclk0:
+	clk_disable_unprepare(imxpriv->phy_pclk0);
+
+	return ret;
+}
+
+static int imx_sata_enable(struct ahci_host_priv *hpriv)
+{
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
+	struct device *dev = &imxpriv->ahci_pdev->dev;
+	int ret;
+
+	if (imxpriv->no_device)
+		return 0;
+
+	ret = ahci_platform_enable_regulators(hpriv);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(imxpriv->sata_ref_clk);
+	if (ret < 0)
+		goto disable_regulator;
+
+	if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) {
+		/*
+		 * set PHY Paremeters, two steps to configure the GPR13,
+		 * one write for rest of parameters, mask of first write
+		 * is 0x07ffffff, and the other one write for setting
+		 * the mpll_clk_en.
+		 */
+		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
+				   IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK |
+				   IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK |
+				   IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK |
+				   IMX6Q_GPR13_SATA_SPD_MODE_MASK |
+				   IMX6Q_GPR13_SATA_MPLL_SS_EN |
+				   IMX6Q_GPR13_SATA_TX_ATTEN_MASK |
+				   IMX6Q_GPR13_SATA_TX_BOOST_MASK |
+				   IMX6Q_GPR13_SATA_TX_LVL_MASK |
+				   IMX6Q_GPR13_SATA_MPLL_CLK_EN |
+				   IMX6Q_GPR13_SATA_TX_EDGE_RATE,
+				   imxpriv->phy_params);
+		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
+				   IMX6Q_GPR13_SATA_MPLL_CLK_EN,
+				   IMX6Q_GPR13_SATA_MPLL_CLK_EN);
+
+		usleep_range(100, 200);
+
+		ret = imx_sata_phy_reset(hpriv);
+		if (ret) {
+			dev_err(dev, "failed to reset phy: %d\n", ret);
+			goto disable_clk;
+		}
+	} else if (imxpriv->type == AHCI_IMX8QM) {
+		ret = imx8_sata_enable(hpriv);
+	}
+
+	usleep_range(1000, 2000);
+
+	return 0;
+
+disable_clk:
+	clk_disable_unprepare(imxpriv->sata_ref_clk);
+disable_regulator:
+	ahci_platform_disable_regulators(hpriv);
+
+	return ret;
+}
+
+static void imx_sata_disable(struct ahci_host_priv *hpriv)
+{
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
+
+	if (imxpriv->no_device)
+		return;
+
+	switch (imxpriv->type) {
+	case AHCI_IMX6QP:
+		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR5,
+				   IMX6Q_GPR5_SATA_SW_PD,
+				   IMX6Q_GPR5_SATA_SW_PD);
+		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
+				   IMX6Q_GPR13_SATA_MPLL_CLK_EN,
+				   !IMX6Q_GPR13_SATA_MPLL_CLK_EN);
+		break;
+
+	case AHCI_IMX6Q:
+		regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
+				   IMX6Q_GPR13_SATA_MPLL_CLK_EN,
+				   !IMX6Q_GPR13_SATA_MPLL_CLK_EN);
+		break;
+
+	case AHCI_IMX8QM:
+		clk_disable_unprepare(imxpriv->epcs_rx_clk);
+		clk_disable_unprepare(imxpriv->epcs_tx_clk);
+		break;
+
+	default:
+		break;
+	}
+
+	clk_disable_unprepare(imxpriv->sata_ref_clk);
+
+	ahci_platform_disable_regulators(hpriv);
+}
+
+static void ahci_imx_error_handler(struct ata_port *ap)
+{
+	u32 reg_val;
+	struct ata_device *dev;
+	struct ata_host *host = dev_get_drvdata(ap->dev);
+	struct ahci_host_priv *hpriv = host->private_data;
+	void __iomem *mmio = hpriv->mmio;
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
+
+	ahci_error_handler(ap);
+
+	if (!(imxpriv->first_time) || ahci_imx_hotplug)
+		return;
+
+	imxpriv->first_time = false;
+
+	ata_for_each_dev(dev, &ap->link, ENABLED)
+		return;
+	/*
+	 * Disable link to save power.  An imx ahci port can't be recovered
+	 * without full reset once the pddq mode is enabled making it
+	 * impossible to use as part of libata LPM.
+	 */
+	reg_val = readl(mmio + IMX_P0PHYCR);
+	writel(reg_val | IMX_P0PHYCR_TEST_PDDQ, mmio + IMX_P0PHYCR);
+	imx_sata_disable(hpriv);
+	imxpriv->no_device = true;
+
+	dev_info(ap->dev, "no device found, disabling link.\n");
+	dev_info(ap->dev, "pass " MODULE_PARAM_PREFIX ".hotplug=1 to enable hotplug\n");
+}
+
+static int ahci_imx_softreset(struct ata_link *link, unsigned int *class,
+		       unsigned long deadline)
+{
+	struct ata_port *ap = link->ap;
+	struct ata_host *host = dev_get_drvdata(ap->dev);
+	struct ahci_host_priv *hpriv = host->private_data;
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
+	int ret;
+
+	if (imxpriv->type == AHCI_IMX53)
+		ret = ahci_pmp_retry_srst_ops.softreset(link, class, deadline);
+	else
+		ret = ahci_ops.softreset(link, class, deadline);
+
+	return ret;
+}
+
+static struct ata_port_operations ahci_imx_ops = {
+	.inherits	= &ahci_ops,
+	.host_stop	= ahci_imx_host_stop,
+	.error_handler	= ahci_imx_error_handler,
+	.softreset	= ahci_imx_softreset,
+};
+
+static const struct ata_port_info ahci_imx_port_info = {
+	.flags		= AHCI_FLAG_COMMON,
+	.pio_mask	= ATA_PIO4,
+	.udma_mask	= ATA_UDMA6,
+	.port_ops	= &ahci_imx_ops,
+};
+
+static const struct of_device_id imx_ahci_of_match[] = {
+	{ .compatible = "fsl,imx53-ahci", .data = (void *)AHCI_IMX53 },
+	{ .compatible = "fsl,imx6q-ahci", .data = (void *)AHCI_IMX6Q },
+	{ .compatible = "fsl,imx6qp-ahci", .data = (void *)AHCI_IMX6QP },
+	{ .compatible = "fsl,imx8qm-ahci", .data = (void *)AHCI_IMX8QM },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_ahci_of_match);
+
+struct reg_value {
+	u32 of_value;
+	u32 reg_value;
+};
+
+struct reg_property {
+	const char *name;
+	const struct reg_value *values;
+	size_t num_values;
+	u32 def_value;
+	u32 set_value;
+};
+
+static const struct reg_value gpr13_tx_level[] = {
+	{  937, IMX6Q_GPR13_SATA_TX_LVL_0_937_V },
+	{  947, IMX6Q_GPR13_SATA_TX_LVL_0_947_V },
+	{  957, IMX6Q_GPR13_SATA_TX_LVL_0_957_V },
+	{  966, IMX6Q_GPR13_SATA_TX_LVL_0_966_V },
+	{  976, IMX6Q_GPR13_SATA_TX_LVL_0_976_V },
+	{  986, IMX6Q_GPR13_SATA_TX_LVL_0_986_V },
+	{  996, IMX6Q_GPR13_SATA_TX_LVL_0_996_V },
+	{ 1005, IMX6Q_GPR13_SATA_TX_LVL_1_005_V },
+	{ 1015, IMX6Q_GPR13_SATA_TX_LVL_1_015_V },
+	{ 1025, IMX6Q_GPR13_SATA_TX_LVL_1_025_V },
+	{ 1035, IMX6Q_GPR13_SATA_TX_LVL_1_035_V },
+	{ 1045, IMX6Q_GPR13_SATA_TX_LVL_1_045_V },
+	{ 1054, IMX6Q_GPR13_SATA_TX_LVL_1_054_V },
+	{ 1064, IMX6Q_GPR13_SATA_TX_LVL_1_064_V },
+	{ 1074, IMX6Q_GPR13_SATA_TX_LVL_1_074_V },
+	{ 1084, IMX6Q_GPR13_SATA_TX_LVL_1_084_V },
+	{ 1094, IMX6Q_GPR13_SATA_TX_LVL_1_094_V },
+	{ 1104, IMX6Q_GPR13_SATA_TX_LVL_1_104_V },
+	{ 1113, IMX6Q_GPR13_SATA_TX_LVL_1_113_V },
+	{ 1123, IMX6Q_GPR13_SATA_TX_LVL_1_123_V },
+	{ 1133, IMX6Q_GPR13_SATA_TX_LVL_1_133_V },
+	{ 1143, IMX6Q_GPR13_SATA_TX_LVL_1_143_V },
+	{ 1152, IMX6Q_GPR13_SATA_TX_LVL_1_152_V },
+	{ 1162, IMX6Q_GPR13_SATA_TX_LVL_1_162_V },
+	{ 1172, IMX6Q_GPR13_SATA_TX_LVL_1_172_V },
+	{ 1182, IMX6Q_GPR13_SATA_TX_LVL_1_182_V },
+	{ 1191, IMX6Q_GPR13_SATA_TX_LVL_1_191_V },
+	{ 1201, IMX6Q_GPR13_SATA_TX_LVL_1_201_V },
+	{ 1211, IMX6Q_GPR13_SATA_TX_LVL_1_211_V },
+	{ 1221, IMX6Q_GPR13_SATA_TX_LVL_1_221_V },
+	{ 1230, IMX6Q_GPR13_SATA_TX_LVL_1_230_V },
+	{ 1240, IMX6Q_GPR13_SATA_TX_LVL_1_240_V }
+};
+
+static const struct reg_value gpr13_tx_boost[] = {
+	{    0, IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB },
+	{  370, IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB },
+	{  740, IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB },
+	{ 1110, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB },
+	{ 1480, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB },
+	{ 1850, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB },
+	{ 2220, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB },
+	{ 2590, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB },
+	{ 2960, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB },
+	{ 3330, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB },
+	{ 3700, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB },
+	{ 4070, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB },
+	{ 4440, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB },
+	{ 4810, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB },
+	{ 5280, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB },
+	{ 5750, IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB }
+};
+
+static const struct reg_value gpr13_tx_atten[] = {
+	{  8, IMX6Q_GPR13_SATA_TX_ATTEN_8_16 },
+	{  9, IMX6Q_GPR13_SATA_TX_ATTEN_9_16 },
+	{ 10, IMX6Q_GPR13_SATA_TX_ATTEN_10_16 },
+	{ 12, IMX6Q_GPR13_SATA_TX_ATTEN_12_16 },
+	{ 14, IMX6Q_GPR13_SATA_TX_ATTEN_14_16 },
+	{ 16, IMX6Q_GPR13_SATA_TX_ATTEN_16_16 },
+};
+
+static const struct reg_value gpr13_rx_eq[] = {
+	{  500, IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB },
+	{ 1000, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB },
+	{ 1500, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB },
+	{ 2000, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB },
+	{ 2500, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB },
+	{ 3000, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB },
+	{ 3500, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB },
+	{ 4000, IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB },
+};
+
+static const struct reg_property gpr13_props[] = {
+	{
+		.name = "fsl,transmit-level-mV",
+		.values = gpr13_tx_level,
+		.num_values = ARRAY_SIZE(gpr13_tx_level),
+		.def_value = IMX6Q_GPR13_SATA_TX_LVL_1_025_V,
+	}, {
+		.name = "fsl,transmit-boost-mdB",
+		.values = gpr13_tx_boost,
+		.num_values = ARRAY_SIZE(gpr13_tx_boost),
+		.def_value = IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB,
+	}, {
+		.name = "fsl,transmit-atten-16ths",
+		.values = gpr13_tx_atten,
+		.num_values = ARRAY_SIZE(gpr13_tx_atten),
+		.def_value = IMX6Q_GPR13_SATA_TX_ATTEN_9_16,
+	}, {
+		.name = "fsl,receive-eq-mdB",
+		.values = gpr13_rx_eq,
+		.num_values = ARRAY_SIZE(gpr13_rx_eq),
+		.def_value = IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB,
+	}, {
+		.name = "fsl,no-spread-spectrum",
+		.def_value = IMX6Q_GPR13_SATA_MPLL_SS_EN,
+		.set_value = 0,
+	},
+};
+
+static u32 imx_ahci_parse_props(struct device *dev,
+				const struct reg_property *prop, size_t num)
+{
+	struct device_node *np = dev->of_node;
+	u32 reg_value = 0;
+	int i, j;
+
+	for (i = 0; i < num; i++, prop++) {
+		u32 of_val;
+
+		if (prop->num_values == 0) {
+			if (of_property_read_bool(np, prop->name))
+				reg_value |= prop->set_value;
+			else
+				reg_value |= prop->def_value;
+			continue;
+		}
+
+		if (of_property_read_u32(np, prop->name, &of_val)) {
+			dev_info(dev, "%s not specified, using %08x\n",
+				prop->name, prop->def_value);
+			reg_value |= prop->def_value;
+			continue;
+		}
+
+		for (j = 0; j < prop->num_values; j++) {
+			if (prop->values[j].of_value == of_val) {
+				dev_info(dev, "%s value %u, using %08x\n",
+					prop->name, of_val, prop->values[j].reg_value);
+				reg_value |= prop->values[j].reg_value;
+				break;
+			}
+		}
+
+		if (j == prop->num_values) {
+			dev_err(dev, "DT property %s is not a valid value\n",
+				prop->name);
+			reg_value |= prop->def_value;
+		}
+	}
+
+	return reg_value;
+}
+
+static const struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
+static int imx8_sata_probe(struct device *dev, struct imx_ahci_priv *imxpriv)
+{
+	struct resource *phy_res;
+	struct platform_device *pdev = imxpriv->ahci_pdev;
+	struct device_node *np = dev->of_node;
+
+	if (of_property_read_u32(np, "fsl,phy-imp", &imxpriv->imped_ratio))
+		imxpriv->imped_ratio = IMX8QM_SATA_PHY_IMPED_RATIO_85OHM;
+	phy_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
+	if (phy_res) {
+		imxpriv->phy_base = devm_ioremap(dev, phy_res->start,
+					resource_size(phy_res));
+		if (!imxpriv->phy_base) {
+			dev_err(dev, "error with ioremap\n");
+			return -ENOMEM;
+		}
+	} else {
+		dev_err(dev, "missing *phy* reg region.\n");
+		return -ENOMEM;
+	}
+	imxpriv->gpr =
+		 syscon_regmap_lookup_by_phandle(np, "hsio");
+	if (IS_ERR(imxpriv->gpr)) {
+		dev_err(dev, "unable to find gpr registers\n");
+		return PTR_ERR(imxpriv->gpr);
+	}
+
+	imxpriv->epcs_tx_clk = devm_clk_get(dev, "epcs_tx");
+	if (IS_ERR(imxpriv->epcs_tx_clk)) {
+		dev_err(dev, "can't get epcs_tx_clk clock.\n");
+		return PTR_ERR(imxpriv->epcs_tx_clk);
+	}
+	imxpriv->epcs_rx_clk = devm_clk_get(dev, "epcs_rx");
+	if (IS_ERR(imxpriv->epcs_rx_clk)) {
+		dev_err(dev, "can't get epcs_rx_clk clock.\n");
+		return PTR_ERR(imxpriv->epcs_rx_clk);
+	}
+	imxpriv->phy_pclk0 = devm_clk_get(dev, "phy_pclk0");
+	if (IS_ERR(imxpriv->phy_pclk0)) {
+		dev_err(dev, "can't get phy_pclk0 clock.\n");
+		return PTR_ERR(imxpriv->phy_pclk0);
+	}
+	imxpriv->phy_pclk1 = devm_clk_get(dev, "phy_pclk1");
+	if (IS_ERR(imxpriv->phy_pclk1)) {
+		dev_err(dev, "can't get phy_pclk1 clock.\n");
+		return PTR_ERR(imxpriv->phy_pclk1);
+	}
+	imxpriv->phy_apbclk = devm_clk_get(dev, "phy_apbclk");
+	if (IS_ERR(imxpriv->phy_apbclk)) {
+		dev_err(dev, "can't get phy_apbclk clock.\n");
+		return PTR_ERR(imxpriv->phy_apbclk);
+	}
+
+	/* Fetch GPIO, then enable the external OSC */
+	imxpriv->clkreq_gpiod = devm_gpiod_get_optional(dev, "clkreq",
+				GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
+	if (IS_ERR(imxpriv->clkreq_gpiod))
+		return PTR_ERR(imxpriv->clkreq_gpiod);
+	if (imxpriv->clkreq_gpiod)
+		gpiod_set_consumer_name(imxpriv->clkreq_gpiod, "SATA CLKREQ");
+
+	return 0;
+}
+
+static int imx_ahci_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *of_id;
+	struct ahci_host_priv *hpriv;
+	struct imx_ahci_priv *imxpriv;
+	unsigned int reg_val;
+	int ret;
+
+	of_id = of_match_device(imx_ahci_of_match, dev);
+	if (!of_id)
+		return -EINVAL;
+
+	imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL);
+	if (!imxpriv)
+		return -ENOMEM;
+
+	imxpriv->ahci_pdev = pdev;
+	imxpriv->no_device = false;
+	imxpriv->first_time = true;
+	imxpriv->type = (unsigned long)of_id->data;
+
+	imxpriv->sata_clk = devm_clk_get(dev, "sata");
+	if (IS_ERR(imxpriv->sata_clk)) {
+		dev_err(dev, "can't get sata clock.\n");
+		return PTR_ERR(imxpriv->sata_clk);
+	}
+
+	imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref");
+	if (IS_ERR(imxpriv->sata_ref_clk)) {
+		dev_err(dev, "can't get sata_ref clock.\n");
+		return PTR_ERR(imxpriv->sata_ref_clk);
+	}
+
+	imxpriv->ahb_clk = devm_clk_get(dev, "ahb");
+	if (IS_ERR(imxpriv->ahb_clk)) {
+		dev_err(dev, "can't get ahb clock.\n");
+		return PTR_ERR(imxpriv->ahb_clk);
+	}
+
+	if (imxpriv->type == AHCI_IMX6Q || imxpriv->type == AHCI_IMX6QP) {
+		u32 reg_value;
+
+		imxpriv->gpr = syscon_regmap_lookup_by_compatible(
+							"fsl,imx6q-iomuxc-gpr");
+		if (IS_ERR(imxpriv->gpr)) {
+			dev_err(dev,
+				"failed to find fsl,imx6q-iomux-gpr regmap\n");
+			return PTR_ERR(imxpriv->gpr);
+		}
+
+		reg_value = imx_ahci_parse_props(dev, gpr13_props,
+						 ARRAY_SIZE(gpr13_props));
+
+		imxpriv->phy_params =
+				   IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M |
+				   IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F |
+				   IMX6Q_GPR13_SATA_SPD_MODE_3P0G |
+				   reg_value;
+	} else if (imxpriv->type == AHCI_IMX8QM) {
+		ret =  imx8_sata_probe(dev, imxpriv);
+		if (ret)
+			return ret;
+	}
+
+	hpriv = ahci_platform_get_resources(pdev, 0);
+	if (IS_ERR(hpriv))
+		return PTR_ERR(hpriv);
+
+	hpriv->plat_data = imxpriv;
+
+	ret = clk_prepare_enable(imxpriv->sata_clk);
+	if (ret)
+		return ret;
+
+	if (imxpriv->type == AHCI_IMX53 &&
+	    IS_ENABLED(CONFIG_HWMON)) {
+		/* Add the temperature monitor */
+		struct device *hwmon_dev;
+
+		hwmon_dev =
+			devm_hwmon_device_register_with_groups(dev,
+							"sata_ahci",
+							hpriv,
+							fsl_sata_ahci_groups);
+		if (IS_ERR(hwmon_dev)) {
+			ret = PTR_ERR(hwmon_dev);
+			goto disable_clk;
+		}
+		devm_thermal_of_zone_register(hwmon_dev, 0, hwmon_dev,
+					      &fsl_sata_ahci_of_thermal_ops);
+		dev_info(dev, "%s: sensor 'sata_ahci'\n", dev_name(hwmon_dev));
+	}
+
+	ret = imx_sata_enable(hpriv);
+	if (ret)
+		goto disable_clk;
+
+	/*
+	 * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL,
+	 * and IP vendor specific register IMX_TIMER1MS.
+	 * Configure CAP_SSS (support stagered spin up).
+	 * Implement the port0.
+	 * Get the ahb clock rate, and configure the TIMER1MS register.
+	 */
+	reg_val = readl(hpriv->mmio + HOST_CAP);
+	if (!(reg_val & HOST_CAP_SSS)) {
+		reg_val |= HOST_CAP_SSS;
+		writel(reg_val, hpriv->mmio + HOST_CAP);
+	}
+	reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL);
+	if (!(reg_val & 0x1)) {
+		reg_val |= 0x1;
+		writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL);
+	}
+
+	reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
+	writel(reg_val, hpriv->mmio + IMX_TIMER1MS);
+
+	ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info,
+				      &ahci_platform_sht);
+	if (ret)
+		goto disable_sata;
+
+	return 0;
+
+disable_sata:
+	imx_sata_disable(hpriv);
+disable_clk:
+	clk_disable_unprepare(imxpriv->sata_clk);
+	return ret;
+}
+
+static void ahci_imx_host_stop(struct ata_host *host)
+{
+	struct ahci_host_priv *hpriv = host->private_data;
+	struct imx_ahci_priv *imxpriv = hpriv->plat_data;
+
+	imx_sata_disable(hpriv);
+	clk_disable_unprepare(imxpriv->sata_clk);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int imx_ahci_suspend(struct device *dev)
+{
+	struct ata_host *host = dev_get_drvdata(dev);
+	struct ahci_host_priv *hpriv = host->private_data;
+	int ret;
+
+	ret = ahci_platform_suspend_host(dev);
+	if (ret)
+		return ret;
+
+	imx_sata_disable(hpriv);
+
+	return 0;
+}
+
+static int imx_ahci_resume(struct device *dev)
+{
+	struct ata_host *host = dev_get_drvdata(dev);
+	struct ahci_host_priv *hpriv = host->private_data;
+	int ret;
+
+	ret = imx_sata_enable(hpriv);
+	if (ret)
+		return ret;
+
+	return ahci_platform_resume_host(dev);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume);
+
+static struct platform_driver imx_ahci_driver = {
+	.probe = imx_ahci_probe,
+	.remove_new = ata_platform_remove_one,
+	.driver = {
+		.name = DRV_NAME,
+		.of_match_table = imx_ahci_of_match,
+		.pm = &ahci_imx_pm_ops,
+	},
+};
+module_platform_driver(imx_ahci_driver);
+
+MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver");
+MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);