From 1dace8cbe0ba32a4876cede2c9ee226462955dcd Mon Sep 17 00:00:00 2001 From: Mirko Parthey Date: Mon, 26 Jun 2017 18:25:46 +0200 Subject: [PATCH] brcm47xx: resolve GPIO conflict for WRT54GSv1 On the Linksys WRT54GSv1, the adm6996 switch driver and the gpio_button_hotplug module both claim GPIO 6, which is connected to the Reset button. When the switch driver's request wins, the Reset button cannot work. This makes it impossible to enter failsafe mode without a serial console. Stop requesting the "adm_rc" GPIO in the switch driver, since it is not used anywhere. Fixes FS#792. Signed-off-by: Mirko Parthey --- .../patches-4.4/209-b44-register-adm-switch.patch | 15 +++++++-------- .../linux/generic/files/drivers/net/phy/adm6996.c | 5 ----- .../include/linux/platform_data/adm6996-gpio.h | 1 - 3 files changed, 7 insertions(+), 14 deletions(-) diff --git a/target/linux/brcm47xx/patches-4.4/209-b44-register-adm-switch.patch b/target/linux/brcm47xx/patches-4.4/209-b44-register-adm-switch.patch index 115b6aea79..7e3d1d6173 100644 --- a/target/linux/brcm47xx/patches-4.4/209-b44-register-adm-switch.patch +++ b/target/linux/brcm47xx/patches-4.4/209-b44-register-adm-switch.patch @@ -19,7 +19,7 @@ Subject: [PATCH 210/210] b44: register adm switch #include #include -@@ -2240,6 +2242,70 @@ static void b44_adjust_link(struct net_d +@@ -2240,6 +2242,69 @@ static void b44_adjust_link(struct net_d } } @@ -50,11 +50,10 @@ Subject: [PATCH 210/210] b44: register adm switch + else + adm_data.eedi = 4; + -+ gpio = bcm47xx_nvram_gpio_pin("adm_rc"); -+ if (gpio >= 0) -+ adm_data.eerc = gpio; -+ else -+ adm_data.eerc = 5; ++ /* ++ * We ignore the "adm_rc" GPIO here. The driver does not use it, ++ * and it conflicts with the Reset button GPIO on the Linksys WRT54GSv1. ++ */ + + info.parent = bp->sdev->dev; + info.name = "adm6996_gpio"; @@ -90,7 +89,7 @@ Subject: [PATCH 210/210] b44: register adm switch static int b44_register_phy_one(struct b44 *bp) { struct mii_bus *mii_bus; -@@ -2283,6 +2349,9 @@ static int b44_register_phy_one(struct b +@@ -2283,6 +2348,9 @@ static int b44_register_phy_one(struct b if (!bp->mii_bus->phy_map[bp->phy_addr] && (sprom->boardflags_lo & (B44_BOARDFLAG_ROBO | B44_BOARDFLAG_ADM))) { @@ -100,7 +99,7 @@ Subject: [PATCH 210/210] b44: register adm switch dev_info(sdev->dev, "could not find PHY at %i, use fixed one\n", bp->phy_addr); -@@ -2479,6 +2548,7 @@ static void b44_remove_one(struct ssb_de +@@ -2479,6 +2547,7 @@ static void b44_remove_one(struct ssb_de unregister_netdev(dev); if (bp->flags & B44_FLAG_EXTERNAL_PHY) b44_unregister_phy_one(bp); diff --git a/target/linux/generic/files/drivers/net/phy/adm6996.c b/target/linux/generic/files/drivers/net/phy/adm6996.c index 25776b8366..d9ea828929 100644 --- a/target/linux/generic/files/drivers/net/phy/adm6996.c +++ b/target/linux/generic/files/drivers/net/phy/adm6996.c @@ -67,7 +67,6 @@ struct adm6996_priv { u8 eecs; u8 eesk; u8 eedi; - u8 eerc; enum adm6996_model model; @@ -1141,7 +1140,6 @@ static int adm6996_gpio_probe(struct platform_device *pdev) priv->eecs = pdata->eecs; priv->eedi = pdata->eedi; - priv->eerc = pdata->eerc; priv->eesk = pdata->eesk; priv->model = pdata->model; @@ -1152,9 +1150,6 @@ static int adm6996_gpio_probe(struct platform_device *pdev) if (ret) return ret; ret = devm_gpio_request(&pdev->dev, priv->eedi, "adm_eedi"); - if (ret) - return ret; - ret = devm_gpio_request(&pdev->dev, priv->eerc, "adm_eerc"); if (ret) return ret; ret = devm_gpio_request(&pdev->dev, priv->eesk, "adm_eesk"); diff --git a/target/linux/generic/files/include/linux/platform_data/adm6996-gpio.h b/target/linux/generic/files/include/linux/platform_data/adm6996-gpio.h index e4fcfafa74..d5af9bbf6e 100644 --- a/target/linux/generic/files/include/linux/platform_data/adm6996-gpio.h +++ b/target/linux/generic/files/include/linux/platform_data/adm6996-gpio.h @@ -23,7 +23,6 @@ struct adm6996_gpio_platform_data { u8 eecs; u8 eesk; u8 eedi; - u8 eerc; enum adm6996_model model; };