From 2cd3e51cb76d49d8db6274ebdc1ba1eb5c872f10 Mon Sep 17 00:00:00 2001
From: "ziv.xu" <ziv.xu@starfivetech.com>
Date: Sun, 4 Feb 2024 10:35:24 +0800
Subject: [PATCH 051/116] spi: spl022: Get and deassert reset in probe()

This fix spi1~6 communication time out.

Signed-off-by: ziv.xu <ziv.xu@starfivetech.com>
Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
---
 drivers/spi/spi-pl022.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -33,6 +33,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/pinctrl/consumer.h>
+#include <linux/reset.h>
 
 /*
  * This macro is used to define some register default values.
@@ -370,6 +371,7 @@ struct pl022 {
 	resource_size_t			phybase;
 	void __iomem			*virtbase;
 	struct clk			*clk;
+	struct reset_control		*rst;
 	struct spi_controller		*host;
 	struct pl022_ssp_controller	*host_info;
 	/* Message per-transfer pump */
@@ -2181,6 +2183,19 @@ static int pl022_probe(struct amba_devic
 		goto err_no_clk_en;
 	}
 
+	pl022->rst = devm_reset_control_get(&adev->dev, NULL);
+	if (IS_ERR(pl022->rst)) {
+		status = PTR_ERR(pl022->rst);
+		dev_err(&adev->dev, "could not retrieve SSP/SPI bus reset\n");
+		goto err_no_rst;
+	}
+
+	status = reset_control_deassert(pl022->rst);
+	if (status) {
+		dev_err(&adev->dev, "could not deassert SSP/SPI bus reset\n");
+		goto err_no_rst_de;
+	}
+
 	/* Initialize transfer pump */
 	tasklet_init(&pl022->pump_transfers, pump_transfers,
 		     (unsigned long)pl022);
@@ -2240,6 +2255,8 @@ static int pl022_probe(struct amba_devic
 	if (platform_info->enable_dma)
 		pl022_dma_remove(pl022);
  err_no_irq:
+ err_no_rst_de:
+ err_no_rst:
 	clk_disable_unprepare(pl022->clk);
  err_no_clk_en:
  err_no_clk: