linux-kernel - [PATCH v3 1/6] reset: imx7: Add the iMX8MP PCIe PHY PERST support

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Message-Id: <1660806153-29001-2-git-send-email-hongxing.zhu@nxp.com>
Date:   Thu, 18 Aug 2022 15:02:28 +0800
From:   Richard Zhu <hongxing.zhu@....com>
To:     p.zabel@...gutronix.de, l.stach@...gutronix.de,
        bhelgaas@...gle.com, lorenzo.pieralisi@....com, robh@...nel.org,
        shawnguo@...nel.org, vkoul@...nel.org,
        alexander.stein@...tq-group.com, marex@...x.de
Cc:     linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        linux-imx@....com, Richard Zhu <hongxing.zhu@....com>
Subject: [PATCH v3 1/6] reset: imx7: Add the iMX8MP PCIe PHY PERST support

On i.MX7/iMX8MM/iMX8MQ, the initialized default value of PERST bit(BIT3)
of SRC_PCIEPHY_RCR is 1b'1.
But i.MX8MP has one inversed default value 1b'0 of PERST bit.

And the PERST bit should be kept 1b'1 after power and clocks are stable.
So add the i.MX8MP PCIe PHY PERST support here.

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
---
 drivers/reset/reset-imx7.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/reset/reset-imx7.c b/drivers/reset/reset-imx7.c
index 185a333df66c..d2408725eb2c 100644
--- a/drivers/reset/reset-imx7.c
+++ b/drivers/reset/reset-imx7.c
@@ -329,6 +329,7 @@ static int imx8mp_reset_set(struct reset_controller_dev *rcdev,
 		break;
 
 	case IMX8MP_RESET_PCIE_CTRL_APPS_EN:
+	case IMX8MP_RESET_PCIEPHY_PERST:
 		value = assert ? 0 : bit;
 		break;
 	}
-- 
2.25.1