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    Subject[PATCH v7 5/7] soc: imx: imx8mp-blk-ctrl: handle PCIe PHY resets
    Date
    From: Lucas Stach <l.stach@pengutronix.de>

    Dessert the PHY reset when powering up the domain and put it back
    into reset when the domain is powered down.

    Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
    Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
    ---
    drivers/soc/imx/imx8mp-blk-ctrl.c | 10 ++++++++++
    1 file changed, 10 insertions(+)

    diff --git a/drivers/soc/imx/imx8mp-blk-ctrl.c b/drivers/soc/imx/imx8mp-blk-ctrl.c
    index 4ca2ede6871b..6c939d68ba9a 100644
    --- a/drivers/soc/imx/imx8mp-blk-ctrl.c
    +++ b/drivers/soc/imx/imx8mp-blk-ctrl.c
    @@ -18,6 +18,8 @@
    #define GPR_REG0 0x0
    #define PCIE_CLOCK_MODULE_EN BIT(0)
    #define USB_CLOCK_MODULE_EN BIT(1)
    +#define PCIE_PHY_APB_RST BIT(4)
    +#define PCIE_PHY_INIT_RST BIT(5)

    struct imx8mp_blk_ctrl_domain;

    @@ -75,6 +77,10 @@ static void imx8mp_hsio_blk_ctrl_power_on(struct imx8mp_blk_ctrl *bc,
    case IMX8MP_HSIOBLK_PD_PCIE:
    regmap_set_bits(bc->regmap, GPR_REG0, PCIE_CLOCK_MODULE_EN);
    break;
    + case IMX8MP_HSIOBLK_PD_PCIE_PHY:
    + regmap_set_bits(bc->regmap, GPR_REG0,
    + PCIE_PHY_APB_RST | PCIE_PHY_INIT_RST);
    + break;
    default:
    break;
    }
    @@ -90,6 +96,10 @@ static void imx8mp_hsio_blk_ctrl_power_off(struct imx8mp_blk_ctrl *bc,
    case IMX8MP_HSIOBLK_PD_PCIE:
    regmap_clear_bits(bc->regmap, GPR_REG0, PCIE_CLOCK_MODULE_EN);
    break;
    + case IMX8MP_HSIOBLK_PD_PCIE_PHY:
    + regmap_clear_bits(bc->regmap, GPR_REG0,
    + PCIE_PHY_APB_RST | PCIE_PHY_INIT_RST);
    + break;
    default:
    break;
    }
    --
    2.25.1
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