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authorCai Huoqing <caihuoqing@baidu.com>2021-09-28 21:48:49 +0800
committerJakub Kicinski <kuba@kernel.org>2021-09-28 17:28:54 -0700
commit9e28cfead2f8f5aba7df03c74c9ec645b5ffc5fd (patch)
tree8ba17af4c910c65ebdbe68f07c380630e51058ca /drivers/net/mdio
parent4ccb9f03fee7b20484187ba7e25a7b9b79fe63d5 (diff)
net: mdio-ipq4019: Fix the error for an optional regs resource
The second resource is optional which is only provided on the chipset IPQ5018. But the blamed commit ignores that and if the resource is not there it just fails. the resource is used like this, if (priv->eth_ldo_rdy) { val = readl(priv->eth_ldo_rdy); val |= BIT(0); writel(val, priv->eth_ldo_rdy); fsleep(IPQ_PHY_SET_DELAY_US); } This patch reverts that to still allow the second resource to be optional because other SoC have the some MDIO controller and doesn't need to second resource. Fixes: fa14d03e014a ("net: mdio-ipq4019: Make use of devm_platform_ioremap_resource()") Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://lore.kernel.org/r/20210928134849.2092-1-caihuoqing@baidu.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/mdio')
-rw-r--r--drivers/net/mdio/mdio-ipq4019.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/mdio/mdio-ipq4019.c b/drivers/net/mdio/mdio-ipq4019.c
index 0d7d3e15d2f0..5f4cd24a0241 100644
--- a/drivers/net/mdio/mdio-ipq4019.c
+++ b/drivers/net/mdio/mdio-ipq4019.c
@@ -207,6 +207,7 @@ static int ipq4019_mdio_probe(struct platform_device *pdev)
{
struct ipq4019_mdio_data *priv;
struct mii_bus *bus;
+ struct resource *res;
int ret;
bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*priv));
@@ -224,7 +225,10 @@ static int ipq4019_mdio_probe(struct platform_device *pdev)
return PTR_ERR(priv->mdio_clk);
/* The platform resource is provided on the chipset IPQ5018 */
- priv->eth_ldo_rdy = devm_platform_ioremap_resource(pdev, 1);
+ /* This resource is optional */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (res)
+ priv->eth_ldo_rdy = devm_ioremap_resource(&pdev->dev, res);
bus->name = "ipq4019_mdio";
bus->read = ipq4019_mdio_read;