| Message ID | 1449165729-993-2-git-send-email-javier@osg.samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
2015-12-03 19:02 GMT+01:00 Javier Martinez Canillas <javier@osg.samsung.com>: > When the WiFi support was added to the IGEP0020 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-igep0020.dts | 24 ++++++++---------------- > 1 file changed, 8 insertions(+), 16 deletions(-) > > diff --git a/arch/arm/boot/dts/omap3-igep0020.dts b/arch/arm/boot/dts/omap3-igep0020.dts > index 3835e1569c29..33d6b4ead092 100644 > --- a/arch/arm/boot/dts/omap3-igep0020.dts > +++ b/arch/arm/boot/dts/omap3-igep0020.dts > @@ -15,25 +15,17 @@ > model = "IGEPv2 Rev. C (TI OMAP AM/DM37x)"; > compatible = "isee,omap3-igep0020", "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 */ > }; > }; > > @@ -51,8 +43,8 @@ > &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 > I also tested these patches Acked-by: Enric Balletbo Serra <enric.balletbo@collabora.com> -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm/boot/dts/omap3-igep0020.dts b/arch/arm/boot/dts/omap3-igep0020.dts index 3835e1569c29..33d6b4ead092 100644 --- a/arch/arm/boot/dts/omap3-igep0020.dts +++ b/arch/arm/boot/dts/omap3-igep0020.dts @@ -15,25 +15,17 @@ model = "IGEPv2 Rev. C (TI OMAP AM/DM37x)"; compatible = "isee,omap3-igep0020", "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 */ }; }; @@ -51,8 +43,8 @@ &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; };
When the WiFi support was added to the IGEP0020 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-igep0020.dts | 24 ++++++++---------------- 1 file changed, 8 insertions(+), 16 deletions(-)