From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757612AbbA1Ury (ORCPT ); Wed, 28 Jan 2015 15:47:54 -0500 Received: from bhuna.collabora.co.uk ([93.93.135.160]:46227 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934276AbbA1Url (ORCPT ); Wed, 28 Jan 2015 15:47:41 -0500 From: Javier Martinez Canillas To: Ulf Hansson Cc: Kukjin Kim , Doug Anderson , Olof Johansson , linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Javier Martinez Canillas Subject: [PATCH 5/5] ARM: dts: exynos5250-snow: Enable wifi power-on Date: Wed, 28 Jan 2015 11:10:19 +0100 Message-Id: <1422439819-29854-6-git-send-email-javier.martinez@collabora.co.uk> X-Mailer: git-send-email 2.1.3 In-Reply-To: <1422439819-29854-1-git-send-email-javier.martinez@collabora.co.uk> References: <1422439819-29854-1-git-send-email-javier.martinez@collabora.co.uk> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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; 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>; -- 2.1.3 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Javier Martinez Canillas Subject: [PATCH 5/5] ARM: dts: exynos5250-snow: Enable wifi power-on Date: Wed, 28 Jan 2015 11:10:19 +0100 Message-ID: <1422439819-29854-6-git-send-email-javier.martinez@collabora.co.uk> References: <1422439819-29854-1-git-send-email-javier.martinez@collabora.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1422439819-29854-1-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: Ulf Hansson Cc: devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-mmc@vger.kernel.org, Doug Anderson , linux-kernel@vger.kernel.org, Kukjin Kim , Olof Johansson , Javier Martinez Canillas , linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org 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; 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>; -- 2.1.3 From mboxrd@z Thu Jan 1 00:00:00 1970 From: javier.martinez@collabora.co.uk (Javier Martinez Canillas) Date: Wed, 28 Jan 2015 11:10:19 +0100 Subject: [PATCH 5/5] ARM: dts: exynos5250-snow: Enable wifi power-on In-Reply-To: <1422439819-29854-1-git-send-email-javier.martinez@collabora.co.uk> References: <1422439819-29854-1-git-send-email-javier.martinez@collabora.co.uk> Message-ID: <1422439819-29854-6-git-send-email-javier.martinez@collabora.co.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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; 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>; -- 2.1.3