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soc: imx: imx8mp-blk-ctrl: handle PCIe PHY resets

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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>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Lucas Stach 2022-09-02 16:58:04 +08:00 committed by Shawn Guo
parent a1a5f15f7f
commit 5506018d3d
1 changed files with 10 additions and 0 deletions
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10
drivers/soc/imx/imx8mp-blk-ctrl.c
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@ -19,6 +19,8 @@
#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;
@ -81,6 +83,10 @@ 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;
}
@ -96,6 +102,10 @@ 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;
}