mirror of
https://github.com/openwrt/openwrt.git
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61 lines
1.7 KiB
Diff
61 lines
1.7 KiB
Diff
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From 2cd3e51cb76d49d8db6274ebdc1ba1eb5c872f10 Mon Sep 17 00:00:00 2001
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From: "ziv.xu" <ziv.xu@starfivetech.com>
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Date: Sun, 4 Feb 2024 10:35:24 +0800
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Subject: [PATCH 051/116] spi: spl022: Get and deassert reset in probe()
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This fix spi1~6 communication time out.
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Signed-off-by: ziv.xu <ziv.xu@starfivetech.com>
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Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
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---
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drivers/spi/spi-pl022.c | 17 +++++++++++++++++
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1 file changed, 17 insertions(+)
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--- a/drivers/spi/spi-pl022.c
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+++ b/drivers/spi/spi-pl022.c
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@@ -33,6 +33,7 @@
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#include <linux/pm_runtime.h>
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#include <linux/of.h>
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#include <linux/pinctrl/consumer.h>
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+#include <linux/reset.h>
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/*
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* This macro is used to define some register default values.
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@@ -370,6 +371,7 @@ struct pl022 {
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resource_size_t phybase;
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void __iomem *virtbase;
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struct clk *clk;
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+ struct reset_control *rst;
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struct spi_controller *host;
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struct pl022_ssp_controller *host_info;
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/* Message per-transfer pump */
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@@ -2181,6 +2183,19 @@ static int pl022_probe(struct amba_devic
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goto err_no_clk_en;
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}
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+ pl022->rst = devm_reset_control_get(&adev->dev, NULL);
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+ if (IS_ERR(pl022->rst)) {
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+ status = PTR_ERR(pl022->rst);
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+ dev_err(&adev->dev, "could not retrieve SSP/SPI bus reset\n");
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+ goto err_no_rst;
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+ }
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+
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+ status = reset_control_deassert(pl022->rst);
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+ if (status) {
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+ dev_err(&adev->dev, "could not deassert SSP/SPI bus reset\n");
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+ goto err_no_rst_de;
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+ }
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+
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/* Initialize transfer pump */
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tasklet_init(&pl022->pump_transfers, pump_transfers,
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(unsigned long)pl022);
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@@ -2240,6 +2255,8 @@ static int pl022_probe(struct amba_devic
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if (platform_info->enable_dma)
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pl022_dma_remove(pl022);
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err_no_irq:
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+ err_no_rst_de:
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+ err_no_rst:
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clk_disable_unprepare(pl022->clk);
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err_no_clk_en:
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err_no_clk:
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