linux-kernel - [PATCH v2 1/5] phy: amlogic: phy-meson-gxl-usb2: keep ID pull-up even in Host mode

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Message-Id: <20200917065949.3476-2-narmstrong@baylibre.com>
Date:   Thu, 17 Sep 2020 08:59:45 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     khilman@...libre.com, kishon@...com,
        martin.blumenstingl@...glemail.com
Cc:     linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Neil Armstrong <narmstrong@...libre.com>,
        linux-usb@...r.kernel.org
Subject: [PATCH v2 1/5] phy: amlogic: phy-meson-gxl-usb2: keep ID pull-up even in Host mode

In order to keep OTG ID detection even when in Host mode, the ID line of
the PHY (if the current phy is an OTG one) pull-up should be kept
enable in both modes.

This fixes OTG switch on GXL, GXM & AXG platforms, otherwise once switched
to Host, the ID detection doesn't work anymore to switch back to Device.

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
Reviewed-by: Kevin Hilman <khilman@...libre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 drivers/phy/amlogic/phy-meson-gxl-usb2.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/amlogic/phy-meson-gxl-usb2.c b/drivers/phy/amlogic/phy-meson-gxl-usb2.c
index 43ec9bf24abf..6e862ea60d8f 100644
--- a/drivers/phy/amlogic/phy-meson-gxl-usb2.c
+++ b/drivers/phy/amlogic/phy-meson-gxl-usb2.c
@@ -158,7 +158,8 @@ static int phy_meson_gxl_usb2_set_mode(struct phy *phy,
 				   U2P_R0_DM_PULLDOWN);
 		regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_DP_PULLDOWN,
 				   U2P_R0_DP_PULLDOWN);
-		regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_ID_PULLUP, 0);
+		regmap_update_bits(priv->regmap, U2P_R0, U2P_R0_ID_PULLUP,
+				   U2P_R0_ID_PULLUP);
 		break;
 
 	case PHY_MODE_USB_DEVICE:
-- 
2.22.0