From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 13 Feb 2022 13:05:23 +0000 (+0100)
Subject: phy: ti: tusb1210: Add a delay between power-on and restoring the phy-parameters
X-Git-Tag: v6.6.17~7878^2~57^2~18
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=df37c99815d9e0775e67276d70c93cbc25f31c70;p=platform%2Fkernel%2Flinux-rpi.git

phy: ti: tusb1210: Add a delay between power-on and restoring the phy-parameters

Now that we actually log errors on ulpi_write failures it becomes clear
that the ulpi_write() restoring the phy-parameters on power-on is failing
after a suspend/resume add a short delay after driving the cs line high
to fix this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220213130524.18748-9-hdegoede@redhat.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---

diff --git a/drivers/phy/ti/phy-tusb1210.c b/drivers/phy/ti/phy-tusb1210.c
index 04baed2..9ef4c5f 100644
--- a/drivers/phy/ti/phy-tusb1210.c
+++ b/drivers/phy/ti/phy-tusb1210.c
@@ -8,6 +8,7 @@
  */
 #include <linux/module.h>
 #include <linux/bitfield.h>
+#include <linux/delay.h>
 #include <linux/ulpi/driver.h>
 #include <linux/ulpi/regs.h>
 #include <linux/gpio/consumer.h>
@@ -18,6 +19,8 @@
 #define TUSB1210_VENDOR_SPECIFIC2_ZHSDRV_MASK	GENMASK(5, 4)
 #define TUSB1210_VENDOR_SPECIFIC2_DP_MASK	BIT(6)
 
+#define TUSB1210_RESET_TIME_MS				30
+
 struct tusb1210 {
 	struct ulpi *ulpi;
 	struct phy *phy;
@@ -60,6 +63,8 @@ static int tusb1210_power_on(struct phy *phy)
 	gpiod_set_value_cansleep(tusb->gpio_reset, 1);
 	gpiod_set_value_cansleep(tusb->gpio_cs, 1);
 
+	msleep(TUSB1210_RESET_TIME_MS);
+
 	/* Restore the optional eye diagram optimization value */
 	return tusb1210_ulpi_write(tusb, TUSB1210_VENDOR_SPECIFIC2,
 				   tusb->vendor_specific2);