Revert "net: ethernet: bgmac: Use devm_platform_ioremap_resource_byname"

This reverts commit 3710e80952cf2dc48257ac9f145b117b5f74e0a5.

Since idm_base and nicpm_base are still optional resources not present
on all platforms, this breaks the driver for everything except Northstar
2 (which has both).

The same change was already reverted once with 755f5738ff98 ("net:
broadcom: fix a mistake about ioremap resource").

So let's do it again.

Fixes: 3710e80952cf ("net: ethernet: bgmac: Use devm_platform_ioremap_resource_byname")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
[florian: Added comments to explain the resources are optional]
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220216184634.2032460-1-f.fainelli@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bgmac-platform.c b/drivers/net/ethernet/broadcom/bgmac-platform.c
index c6412c5..b4381cd 100644 (file)
--- a/drivers/net/ethernet/broadcom/bgmac-platform.c
+++ b/drivers/net/ethernet/broadcom/bgmac-platform.c
@@ -172,6 +172,7 @@ static int bgmac_probe(struct platform_device *pdev)
 {
        struct device_node *np = pdev->dev.of_node;
        struct bgmac *bgmac;
+       struct resource *regs;
        int ret;
 
        bgmac = bgmac_alloc(&pdev->dev);
@@ -208,15 +209,23 @@ static int bgmac_probe(struct platform_device *pdev)
        if (IS_ERR(bgmac->plat.base))
                return PTR_ERR(bgmac->plat.base);
 
-       bgmac->plat.idm_base = devm_platform_ioremap_resource_byname(pdev, "idm_base");
-       if (IS_ERR(bgmac->plat.idm_base))
-               return PTR_ERR(bgmac->plat.idm_base);
-       else
+       /* The idm_base resource is optional for some platforms */
+       regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
+       if (regs) {
+               bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
+               if (IS_ERR(bgmac->plat.idm_base))
+                       return PTR_ERR(bgmac->plat.idm_base);
                bgmac->feature_flags &= ~BGMAC_FEAT_IDM_MASK;
+       }
 
-       bgmac->plat.nicpm_base = devm_platform_ioremap_resource_byname(pdev, "nicpm_base");
-       if (IS_ERR(bgmac->plat.nicpm_base))
-               return PTR_ERR(bgmac->plat.nicpm_base);
+       /* The nicpm_base resource is optional for some platforms */
+       regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base");
+       if (regs) {
+               bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev,
+                                                              regs);
+               if (IS_ERR(bgmac->plat.nicpm_base))
+                       return PTR_ERR(bgmac->plat.nicpm_base);
+       }
 
        bgmac->read = platform_bgmac_read;
        bgmac->write = platform_bgmac_write;