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clk: en7523: reset PCIE HB on init for AN7581

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It was reported that PCIE HB should be reset for AN7581 or some instability
or link training issue will be present on warm boot scenario.

Reset PCIE HB on clk HW init to handle warm boot problem with PCIe.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Brian Masney <bmasney@redhat.com>
This commit is contained in:
Christian Marangi
2026-07-08 10:40:44 +02:00
committed by Brian Masney
parent 23454c4635
commit 584dfca970
1 changed files with 7 additions and 0 deletions
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7
drivers/clk/clk-en7523.c
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@@ -57,6 +57,7 @@
#define REG_RST_CTRL2 0x830
#define REG_RST_CTRL1 0x834
#define REG_PCIE_HB_RST BIT(29)
#define EN751221_REG_RST_DMT 0x84
#define EN751221_REG_RST_USB 0xec
@@ -853,6 +854,12 @@ static int en7581_clk_hw_init(struct platform_device *pdev,
val = readl(base + REG_NP_SCU_PCIC);
writel(val | 3, base + REG_NP_SCU_PCIC);
val = readl(base + REG_RST_CTRL1);
val |= REG_PCIE_HB_RST;
writel(val, base + REG_RST_CTRL1);
val &= ~REG_PCIE_HB_RST;
writel(val, base + REG_RST_CTRL1);
return en7581_reset_register(&pdev->dev, base, en7581_rst_map,
ARRAY_SIZE(en7581_rst_map),
en7581_rst_ofs);