Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1283227

[PATCH 2/2] ARM: dts: omap3-igep0030: Use MMC pwrseq to init SDIO WiFi

Show all headers | View raw

When the WiFi support was added to the IGEP0030 board, the MMC subsystem
did not provide a mechanism to define power sequence providers. So a DT
hack was used to toggle the WiFi chip reset and power down pins by using
fake fixed regulators whose enable GPIO was the GPIOs connected to these
pins.

But now the simple MMC power sequence provider can be used for this and
the workaround removed.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>

---

 arch/arm/boot/dts/omap3-igep0030.dts | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/arch/arm/boot/dts/omap3-igep0030.dts b/arch/arm/boot/dts/omap3-igep0030.dts
index 468608dab30a..55b0cc4f5ee5 100644
--- a/arch/arm/boot/dts/omap3-igep0030.dts
+++ b/arch/arm/boot/dts/omap3-igep0030.dts
@@ -15,25 +15,17 @@
 	model = "IGEP COM MODULE Rev. E (TI OMAP AM/DM37x)";
 	compatible = "isee,omap3-igep0030", "ti,omap36xx", "ti,omap3";
 
-	/* Regulator to trigger the WIFI_PDN signal of the Wifi module */
-	lbee1usjyc_pdn: lbee1usjyc_pdn {
+	vmmcsdio_fixed: fixedregulator-mmcsdio {
 		compatible = "regulator-fixed";
-		regulator-name = "regulator-lbee1usjyc-pdn";
+		regulator-name = "vmmcsdio_fixed";
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
-		gpio = <&gpio5 10 GPIO_ACTIVE_HIGH>;	/* gpio_138 - WIFI_PDN */
-		startup-delay-us = <10000>;
-		enable-active-high;
 	};
 
-	/* Regulator to trigger the RESET_N_W signal of the Wifi module */
-	lbee1usjyc_reset_n_w: lbee1usjyc_reset_n_w {
-		compatible = "regulator-fixed";
-		regulator-name = "regulator-lbee1usjyc-reset-n-w";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-		gpio = <&gpio5 11 GPIO_ACTIVE_HIGH>;	/* gpio_139 - RESET_N_W */
-		enable-active-high;
+	mmc2_pwrseq: mmc2_pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&gpio5 11 GPIO_ACTIVE_LOW>,	/* gpio_139 - RESET_N_W */
+			      <&gpio5 10 GPIO_ACTIVE_LOW>;	/* gpio_138 - WIFI_PDN */
 	};
 };
 
@@ -62,8 +54,8 @@
 &mmc2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&mmc2_pins &lbee1usjyc_pins>;
-	vmmc-supply = <&lbee1usjyc_pdn>;
-	vmmc_aux-supply = <&lbee1usjyc_reset_n_w>;
+	vmmc-supply = <&vmmcsdio_fixed>;
+	mmc-pwrseq = <&mmc2_pwrseq>;
 	bus-width = <4>;
 	non-removable;
 };
-- 
2.4.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH 2/2] ARM: dts: omap3-igep0030: Use MMC pwrseq to init SDIO WiFi Javier Martinez Canillas <javier@osg.samsung.com> - 2015-12-03 19:10 +0100
  Re: [PATCH 2/2] ARM: dts: omap3-igep0030: Use MMC pwrseq to init SDIO WiFi Enric Balletbo Serra <eballetbo@gmail.com> - 2015-12-04 15:40 +0100

csiph-web