Commit 5506018d authored by Lucas Stach's avatar Lucas Stach Committed by Shawn Guo
Browse files

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



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

Signed-off-by: default avatarLucas Stach <l.stach@pengutronix.de>
Signed-off-by: default avatarRichard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent a1a5f15f

drivers/soc/imx/imx8mp-blk-ctrl.c

+10 −0
Original line number Diff line number Diff line
@@ -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;

	}