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From: Chen-Yu Tsai <wens@kernel.org>
To: Giuseppe Cavallaro <peppe.cavallaro@st.com>,
	Alexandre Torgue <alexandre.torgue@st.com>,
	Jose Abreu <joabreu@synopsys.com>,
	"David S. Miller" <davem@davemloft.net>,
	Heiko Stuebner <heiko@sntech.de>
Cc: Chen-Yu Tsai <wens@csie.org>,
	linux-rockchip@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH netdev] net: stmmac: dwmac-rk: Don't fail if phy regulator is absent
Date: Thu, 29 Aug 2019 11:17:24 +0800	[thread overview]
Message-ID: <20190829031724.20865-1-wens@kernel.org> (raw)

From: Chen-Yu Tsai <wens@csie.org>

The devicetree binding lists the phy phy as optional. As such, the
driver should not bail out if it can't find a regulator. Instead it
should just skip the remaining regulator related code and continue
on normally.

Skip the remainder of phy_power_on() if a regulator supply isn't
available. This also gets rid of the bogus return code.

Fixes: 2e12f536635f ("net: stmmac: dwmac-rk: Use standard devicetree property for phy regulator")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---

On a separate note, maybe we should add this file to the Rockchip
entry in MAINTAINERS?

---
 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 4644b2aeeba1..e2e469c37a4d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -1194,10 +1194,8 @@ static int phy_power_on(struct rk_priv_data *bsp_priv, bool enable)
 	int ret;
 	struct device *dev = &bsp_priv->pdev->dev;
 
-	if (!ldo) {
-		dev_err(dev, "no regulator found\n");
-		return -1;
-	}
+	if (!ldo)
+		return 0;
 
 	if (enable) {
 		ret = regulator_enable(ldo);
-- 
2.20.1


WARNING: multiple messages have this Message-ID (diff)
From: Chen-Yu Tsai <wens@kernel.org>
To: Giuseppe Cavallaro <peppe.cavallaro@st.com>,
	Alexandre Torgue <alexandre.torgue@st.com>,
	Jose Abreu <joabreu@synopsys.com>,
	"David S. Miller" <davem@davemloft.net>,
	Heiko Stuebner <heiko@sntech.de>
Cc: linux-rockchip@lists.infradead.org, Chen-Yu Tsai <wens@csie.org>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org
Subject: [PATCH netdev] net: stmmac: dwmac-rk: Don't fail if phy regulator is absent
Date: Thu, 29 Aug 2019 11:17:24 +0800	[thread overview]
Message-ID: <20190829031724.20865-1-wens@kernel.org> (raw)

From: Chen-Yu Tsai <wens@csie.org>

The devicetree binding lists the phy phy as optional. As such, the
driver should not bail out if it can't find a regulator. Instead it
should just skip the remaining regulator related code and continue
on normally.

Skip the remainder of phy_power_on() if a regulator supply isn't
available. This also gets rid of the bogus return code.

Fixes: 2e12f536635f ("net: stmmac: dwmac-rk: Use standard devicetree property for phy regulator")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---

On a separate note, maybe we should add this file to the Rockchip
entry in MAINTAINERS?

---
 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 4644b2aeeba1..e2e469c37a4d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -1194,10 +1194,8 @@ static int phy_power_on(struct rk_priv_data *bsp_priv, bool enable)
 	int ret;
 	struct device *dev = &bsp_priv->pdev->dev;
 
-	if (!ldo) {
-		dev_err(dev, "no regulator found\n");
-		return -1;
-	}
+	if (!ldo)
+		return 0;
 
 	if (enable) {
 		ret = regulator_enable(ldo);
-- 
2.20.1


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             reply	other threads:[~2019-08-29  3:17 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-29  3:17 Chen-Yu Tsai [this message]
2019-08-29  3:17 ` [PATCH netdev] net: stmmac: dwmac-rk: Don't fail if phy regulator is absent Chen-Yu Tsai
2019-08-30 21:17 ` David Miller
2019-08-30 21:17   ` David Miller

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