linux-kernel - [PATCH v1 1/1] phy: ti: tusb1210: Don't check for write errors when powering on

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Message-Id: <20220613160848.82746-1-andriy.shevchenko@linux.intel.com>
Date:   Mon, 13 Jun 2022 19:08:48 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Vinod Koul <vkoul@...nel.org>, Hans de Goede <hdegoede@...hat.com>,
        Stephan Gerhold <stephan@...hold.net>,
        linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Ferry Toth <ftoth@...londelft.nl>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] phy: ti: tusb1210: Don't check for write errors when powering on

On some platforms, like Intel Merrifield, the writing values during power on
may timeout:

   tusb1210 dwc3.0.auto.ulpi: error -110 writing val 0x41 to reg 0x80
   phy phy-dwc3.0.auto.ulpi.0: phy poweron failed --> -110
   dwc3 dwc3.0.auto: error -ETIMEDOUT: failed to initialize core
   dwc3: probe of dwc3.0.auto failed with error -110

which effectively fails the probe of the USB controller.
Drop the check as it was before the culprit commit (see Fixes tag).

Fixes: 09a3512681b3 ("phy: ti: tusb1210: Improve ulpi_read()/_write() error checking")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/phy/ti/phy-tusb1210.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/ti/phy-tusb1210.c b/drivers/phy/ti/phy-tusb1210.c
index c3ab4b69ea68..669c13d6e402 100644
--- a/drivers/phy/ti/phy-tusb1210.c
+++ b/drivers/phy/ti/phy-tusb1210.c
@@ -105,8 +105,9 @@ static int tusb1210_power_on(struct phy *phy)
 	msleep(TUSB1210_RESET_TIME_MS);
 
 	/* Restore the optional eye diagram optimization value */
-	return tusb1210_ulpi_write(tusb, TUSB1210_VENDOR_SPECIFIC2,
-				   tusb->vendor_specific2);
+	tusb1210_ulpi_write(tusb, TUSB1210_VENDOR_SPECIFIC2, tusb->vendor_specific2);
+
+	return 0;
 }
 
 static int tusb1210_power_off(struct phy *phy)
-- 
2.35.1