From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arend van Spriel Subject: Re: [PATCH 5/5] ARM: dts: exynos5250-snow: Enable wifi power-on Date: Wed, 28 Jan 2015 15:03:36 +0100 Message-ID: <54C8EC38.6010702@broadcom.com> References: <1422439819-29854-1-git-send-email-javier.martinez@collabora.co.uk> <1422439819-29854-6-git-send-email-javier.martinez@collabora.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1422439819-29854-6-git-send-email-javier.martinez@collabora.co.uk> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Javier Martinez Canillas Cc: devicetree@vger.kernel.org, Ulf Hansson , linux-samsung-soc@vger.kernel.org, linux-mmc@vger.kernel.org, Doug Anderson , linux-kernel@vger.kernel.org, Kukjin Kim , Olof Johansson , linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org On 01/28/15 11:10, Javier Martinez Canillas wrote: > The Snow board has a MMC/SDIO wifi chip that is always powered but it > needs a power sequence involving a reset (active low) and an enable > (active high) pins. Both pins are marked as active low since the MMC > simple power sequence driver asserts the pins prior to the card power > up procedure and de-asserts the pins after the card has been powered. > > So the reset line will be left de-asserted and the enable pin will be > left asserted. > > The chip also needs an external 32kHz reference clock to be operational > that is by the MAX77686 PMIC clock. > > Add a simple MMC power sequence provider for the wifi MMC/SDIO slot. > > Signed-off-by: Javier Martinez Canillas > --- > arch/arm/boot/dts/exynos5250-snow.dts | 25 ++++++++++++++++++++++++- > 1 file changed, 24 insertions(+), 1 deletion(-) > > diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts > index b9aeec430527..0f7971ba8238 100644 > --- a/arch/arm/boot/dts/exynos5250-snow.dts > +++ b/arch/arm/boot/dts/exynos5250-snow.dts > @@ -229,6 +229,13 @@ > power-supply =<&fet6>; > backlight =<&backlight>; > }; > + > + mmc3_pwrseq: mmc3_pwrseq { > + reset-gpios =<&gpx0 2 GPIO_ACTIVE_LOW>, /* WIFI_RSTn */ > + <&gpx0 1 GPIO_ACTIVE_LOW>; /* WIFI_EN */ > + clocks =<&max77686 MAX77686_CLK_PMIC>; > + clock-names = "ext_clock"; > + }; > }; > > &dp { > @@ -531,17 +538,33 @@ > status = "okay"; > num-slots =<1>; > broken-cd; > + cap-sdio-irq; This seems like an unrelated change, right? Regards, Arend > card-detect-delay =<200>; > samsung,dw-mshc-ciu-div =<3>; > samsung,dw-mshc-sdr-timing =<2 3>; > samsung,dw-mshc-ddr-timing =<1 2>; > pinctrl-names = "default"; > - pinctrl-0 =<&sd3_clk&sd3_cmd&sd3_bus4>; > + pinctrl-0 =<&sd3_clk&sd3_cmd&sd3_bus4&wifi_en&wifi_rst>; > bus-width =<4>; > cap-sd-highspeed; > + mmc-pwrseq =<&mmc3_pwrseq>; > }; > > &pinctrl_0 { > + wifi_en: wifi-en { > + samsung,pins = "gpx0-1"; > + samsung,pin-function =<1>; > + samsung,pin-pud =<0>; > + samsung,pin-drv =<0>; > + }; > + > + wifi_rst: wifi-rst { > + samsung,pins = "gpx0-2"; > + samsung,pin-function =<1>; > + samsung,pin-pud =<0>; > + samsung,pin-drv =<0>; > + }; > + > power_key_irq: power-key-irq { > samsung,pins = "gpx1-3"; > samsung,pin-function =<0xf>;