From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Zhao Subject: [PATCH v2 07/12] ARM: imx6q: add config-on-boot gpios Date: Mon, 21 May 2012 17:23:52 +0800 Message-ID: <1337592237-5090-8-git-send-email-richard.zhao@freescale.com> References: <1337592237-5090-1-git-send-email-richard.zhao@freescale.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1337592237-5090-1-git-send-email-richard.zhao-KZfg59tc24xl57MIdRCFDg@public.gmane.org> Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Cc: B29397-KZfg59tc24xl57MIdRCFDg@public.gmane.org, B20596-KZfg59tc24xl57MIdRCFDg@public.gmane.org, marex-ynQEQJNshbs@public.gmane.org, shawn.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, alexander.shishkin-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, fabio.estevam-KZfg59tc24xl57MIdRCFDg@public.gmane.org, dong.aisheng-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org, richard.zhao-KZfg59tc24xl57MIdRCFDg@public.gmane.org, linuxzsc-MeMPY/F8WlbQT0dZR+AlfA@public.gmane.org, Rob Herring , Grant Likely List-Id: devicetree@vger.kernel.org Sometimes, boards have gpios that don't own by any driver or owner by a generic driver that don't like hacks. Such gpios is normally output and need setup once on boot. So I introduce the config-on-boot gpios. Signed-off-by: Richard Zhao Cc: Shawn Guo Cc: Rob Herring Cc: Grant Likely --- arch/arm/boot/dts/imx6q-sabrelite.dts | 7 ++++++ arch/arm/mach-imx/mach-imx6q.c | 35 +++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+), 0 deletions(-) diff --git a/arch/arm/boot/dts/imx6q-sabrelite.dts b/arch/arm/boot/dts/imx6q-sabrelite.dts index e0ec929..1dd2261 100644 --- a/arch/arm/boot/dts/imx6q-sabrelite.dts +++ b/arch/arm/boot/dts/imx6q-sabrelite.dts @@ -17,6 +17,13 @@ model = "Freescale i.MX6 Quad SABRE Lite Board"; compatible = "fsl,imx6q-sabrelite", "fsl,imx6q"; + config-on-boot { + output-gpios = < + &gpio3 22 0>; /* vbus reset */ + output-gpio-values = < + 1>; /* vbus reset */ + }; + memory { reg = <0x10000000 0x40000000>; }; diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c index b47e98b..577cf19 100644 --- a/arch/arm/mach-imx/mach-imx6q.c +++ b/arch/arm/mach-imx/mach-imx6q.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -113,6 +114,38 @@ static void __init imx6q_sabrelite_init(void) imx6q_sabrelite_cko1_setup(); } +static void __init imx6q_config_on_boot(void) +{ + struct device_node *np; + struct property *pp; + int cnt, len, i; + int gpio; + + np = of_find_node_by_path("/config-on-boot"); + if (!np) + return; + cnt = of_gpio_named_count(np, "output-gpios"); + pp = of_find_property(np, "output-gpio-values", &len); + if (!pp || cnt != len / sizeof(u32)) { + pr_err("Invalid config-on-boot gpios!\n"); + of_node_put(np); + return; + } + for (i = 0; i < cnt; i++) { + gpio = of_get_named_gpio(np, "output-gpios", i); + if (gpio_is_valid(gpio)) + gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, + "config-on-boot"); + } + + of_node_put(np); +} + +static void __init imx6q_post_populate(void) +{ + imx6q_config_on_boot(); +} + static void __init imx6q_init_machine(void) { /* @@ -126,6 +159,8 @@ static void __init imx6q_init_machine(void) of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); + imx6q_post_populate(); + imx6q_pm_init(); } -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html