From: Jim Liu <jim.t90615@gmail.com>
Date: Tue, 23 Apr 2024 06:38:42 +0000 (+0800)
Subject: spi: npcm_pspi: Reset HW in driver probe
X-Git-Url: http://git.dujemihanovic.xyz/img/static/git-favicon.png?a=commitdiff_plain;h=914b766a2a6b0f746b2e6fe3bf3d70881e6da610;p=u-boot.git

spi: npcm_pspi: Reset HW in driver probe

Reset HW to clear old status and use default data mode(8-bit).

Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>
---

diff --git a/drivers/spi/npcm_pspi.c b/drivers/spi/npcm_pspi.c
index eb14185273..c9441304f5 100644
--- a/drivers/spi/npcm_pspi.c
+++ b/drivers/spi/npcm_pspi.c
@@ -7,6 +7,7 @@
 #include <dm.h>
 #include <spi.h>
 #include <clk.h>
+#include <reset.h>
 #include <asm/gpio.h>
 #include <linux/iopoll.h>
 
@@ -194,6 +195,7 @@ static int npcm_pspi_probe(struct udevice *bus)
 {
 	struct npcm_pspi_priv *priv = dev_get_priv(bus);
 	int node = dev_of_offset(bus);
+	struct reset_ctl reset;
 	int ret;
 
 	ret = clk_get_by_index(bus, 0, &priv->clk);
@@ -205,6 +207,14 @@ static int npcm_pspi_probe(struct udevice *bus)
 	gpio_request_by_name_nodev(offset_to_ofnode(node), "cs-gpios", 0,
 				   &priv->cs_gpio, GPIOD_IS_OUT| GPIOD_ACTIVE_LOW);
 
+	/* Reset HW */
+	ret = reset_get_by_index(bus, 0, &reset);
+	if (!ret) {
+		reset_assert(&reset);
+		udelay(5);
+		reset_deassert(&reset);
+	}
+
 	return 0;
 }