diff options
Diffstat (limited to 'meta-openbmc-mods/meta-ast2500/recipes-kernel/linux/linux-aspeed/0003-Enable-GPIOE0-and-GPIOE2-pass-through-by-default.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-ast2500/recipes-kernel/linux/linux-aspeed/0003-Enable-GPIOE0-and-GPIOE2-pass-through-by-default.patch | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-ast2500/recipes-kernel/linux/linux-aspeed/0003-Enable-GPIOE0-and-GPIOE2-pass-through-by-default.patch b/meta-openbmc-mods/meta-ast2500/recipes-kernel/linux/linux-aspeed/0003-Enable-GPIOE0-and-GPIOE2-pass-through-by-default.patch new file mode 100644 index 000000000..1d26b9667 --- /dev/null +++ b/meta-openbmc-mods/meta-ast2500/recipes-kernel/linux/linux-aspeed/0003-Enable-GPIOE0-and-GPIOE2-pass-through-by-default.patch @@ -0,0 +1,70 @@ +From d26dd7c4ef1a2cb88440420deccc54eb88129c60 Mon Sep 17 00:00:00 2001 +From: "Jason M. Bills" <jason.m.bills@linux.intel.com> +Date: Mon, 6 May 2019 14:18:27 -0700 +Subject: [PATCH] Enable GPIOE0 and GPIOE2 pass-through by default + +This change sets the gpio DT pinctrl default configuration to +enable GPIOE0 and GPIOE2 pass-through. Since this causes +pinctrl_get_select_default() to be called automatically for +the gpio driver to claim the GPIO pins in those groups, we +also need to call pinctrl_put() to release claim on the +pass-through GPIOs so they can be requested at runtime. + +Tested: +Disabled pass-through in uboot and confirmed that after booting +Linux, pass-through is enabled and 'cat /sys/kernel/debug/pinctrl/ +1e6e2000.syscon\:pinctrl-aspeed-g5-pinctrl/pinmux-pins' shows that +the pass-through GPIOs are UNCLAIMED. + +Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com> +--- + arch/arm/boot/dts/aspeed-bmc-intel-purley.dts | 4 ++++ + drivers/gpio/gpio-aspeed.c | 10 ++++++++++ + 2 files changed, 14 insertions(+) + +diff --git a/arch/arm/boot/dts/aspeed-bmc-intel-purley.dts b/arch/arm/boot/dts/aspeed-bmc-intel-purley.dts +index 45556ac..051e927 100644 +--- a/arch/arm/boot/dts/aspeed-bmc-intel-purley.dts ++++ b/arch/arm/boot/dts/aspeed-bmc-intel-purley.dts +@@ -124,6 +124,10 @@ + + &gpio { + status = "okay"; ++ /* Enable GPIOE0 and GPIOE2 pass-through by default */ ++ pinctrl-names = "pass-through"; ++ pinctrl-0 = <&pinctrl_gpie0_default ++ &pinctrl_gpie2_default>; + gpio-line-names = + /*A0-A8*/ "","","","","","","","", + /*B0-B8*/ "","","","","","","","", +diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c +index 2175070..f47d139 100644 +--- a/drivers/gpio/gpio-aspeed.c ++++ b/drivers/gpio/gpio-aspeed.c +@@ -1157,6 +1157,7 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev) + const struct of_device_id *gpio_id; + struct aspeed_gpio *gpio; + struct resource *res; ++ struct pinctrl *pinctrl; + int rc, i, banks; + + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); +@@ -1205,6 +1206,15 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev) + return -ENOMEM; + + /* ++ * Select the pass-through pinctrl config to enable the pass-through ++ * mux for GPIOs E0 and E2. Then call pinctrl_put() to release claim ++ * of the GPIO pins, so they can be requested at runtime. ++ */ ++ pinctrl = pinctrl_get_select(&pdev->dev, "pass-through"); ++ if (pinctrl) ++ pinctrl_put(pinctrl); ++ ++ /* + * Populate it with initial values read from the HW and switch + * all command sources to the ARM by default + */ +-- +2.7.4 + |