[PATCH v3 3/4] mmc: omap_hsmmc: Remux pins to support SDIO interrupt on AM335x
Javier Martinez Canillas
martinez.javier at gmail.com
Fri Oct 18 21:02:45 EDT 2013
On Sat, Oct 19, 2013 at 1:14 AM, NeilBrown <neilb at suse.de> wrote:
> On Fri, 18 Oct 2013 12:12:48 +0200 Javier Martinez Canillas
> <martinez.javier at gmail.com> wrote:
>
>> On Fri, Oct 18, 2013 at 8:20 AM, NeilBrown <neilb at suse.de> wrote:
>> > On Sat, 5 Oct 2013 13:17:09 +0200 Andreas Fenkart <afenkart at gmail.com> wrote:
>> >
>> >> The am335x can't detect pending cirq in PM runtime suspend.
>> >> This patch reconfigures dat1 as a GPIO before going to suspend.
>> >> SDIO interrupts are detected with the GPIO, while in runtime
>> >> suspend, standard detection of the module block otherwise.
>> >>
>> >> Signed-off-by: Andreas Fenkart <afenkart at gmail.com>
>> >>
>> >> diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
>> >> index 1136e6b..146f3ad 100644
>> >> --- a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
>> >> +++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
>> >> @@ -21,8 +21,11 @@ ti,non-removable: non-removable slot (like eMMC)
>> >> ti,needs-special-reset: Requires a special softreset sequence
>> >> ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed
>> >> ti,quirk-swakup-missing: SOC missing the swakeup line, will not detect
>> >> -SDIO irq while in suspend. Fallback to polling. Affected chips are
>> >> -am335x,
>> >> +SDIO irq while in suspend. The workaround is to reconfigure the dat1 line as a
>> >> +GPIO upon suspend. Beyond this option and the GPIO config, you also need to set
>> >> +named pinctrl states "default", "active" and "idle ", see example below. The
>> >> +MMC driver will then then toggle between default and idle during the runtime
>> >> +Affected chips are am335x,
>> >>
>> >> ------
>> >> | PRCM |
>> >> @@ -49,3 +52,24 @@ Example:
>> >> vmmc-supply = <&vmmc>; /* phandle to regulator node */
>> >> ti,non-removable;
>> >> };
>> >> +
>> >> +[am335x with with gpio for sdio irq]
>> >> +
>> >> + mmc1_cirq_pin: pinmux_cirq_pin {
>> >> + pinctrl-single,pins = <
>> >> + 0x0f8 0x3f /* MMC0_DAT1 as GPIO2_28 */
>> >> + >;
>> >> + };
>> >> +
>> >> + mmc1: mmc at 48060000 {
>> >> + ti,non-removable;
>> >> + bus-width = <4>;
>> >> + vmmc-supply = <&ldo2_reg>;
>> >> + vmmc_aux-supply = <&vmmc>;
>> >> + ti,quirk-swakeup-missing;
>> >> + pinctrl-names = "default", "active", "idle";
>> >> + pinctrl-0 = <&mmc1_pins>;
>> >> + pinctrl-1 = <&mmc1_pins>;
>> >> + pinctrl-2 = <&mmc1_cirq_pin>;
>> >> + ti,cirq-gpio = <&gpio3 28 0>;
>> >> + };
>> >
>> >
>> > hi,
>> > I've been trying to get SD irq to work on my OMAP3 DM3730.
>> > I seems to need the magic to catch interrupts while FCLK is off, as
>> > the only way I can get it to work at the moment is to keep FCLK on.
>> >
>> > I discovered your patch and tried it out, but it doesn't seem to work for me.
>> >
>> > I have a Libertas WIFI chip attached to the second mmc (which is sometimes
>> > called mmc1, and sometimes mmc2 - very confusing!).
>>
>> Hi Neil,
>>
>> I have a DM3730 board with the same setup, Libertas (Marvell SD8686)
>> wifi + bt chip attached to mmc2.
>>
>> I was going to try to add support for this to the DTS but it would be
>> great if I can use your as a reference.
>>
>> Would you be so kind to share your DTS?
>>
>
> My DTS is below. It contains an number of things that are not supported in
> mainline yet. Details can be found in
> git://neil.brown.name/gta04 mainline
> and
> http://git.neil.brown.name/?p=gta04.git;a=shortlog;h=refs/heads/mainline
> (this is my working tree and gets rebased and messed up regularly).
>
> NeilBrown
>
Hello Neil,
Thanks a lot for your DTS and the pointers to your trees.
Best regards,
Javier
> /*
> * Copyright (C) 2013 Marek Belisko <marek at goldelico.com>
> *
> * Based on omap3-beagle-xm.dts
> *
> * This program is free software; you can redistribute it and/or modify
> * it under the terms of the GNU General Public License version 2 as
> * published by the Free Software Foundation.
> */
> /dts-v1/;
> #define RFKILL_TYPE_GPS 6
> #include "omap36xx.dtsi"
>
> / {
> model = "OMAP3 GTA04";
> compatible = "ti,omap3-gta04", "ti,omap3";
> chosen {
> bootargs = "console=ttyO2,115200n8 vram=12M omapfb.rotate_type=0 omapdss.def_disp=lcd root=/dev/mmcblk0p2 rw rootfstype=ext3 rootwait twl4030_charger.allow_usb=1 musb_hdrc.preserve_vbus=1 log_buf_len=8M ignore_loglevel no_console_suspend";
> };
>
> cpus {
> cpu at 0 {
> cpu0-supply = <&vcc>;
> };
> };
>
> memory {
> device_type = "memory";
> reg = <0x80000000 0x20000000>; /* 512 MB */
> };
>
> aux-keys {
> compatible = "gpio-keys";
>
> aux-button {
> label = "aux";
> linux,code = <169>;
> gpios = <&gpio1 7 GPIO_ACTIVE_HIGH>;
> gpio-key,wakeup;
> };
> };
>
> incoming-keys {
> compatible = "gpio-keys";
>
> incoming-button {
> label = "Option";
> linux,code = <240>;
> /* 176 for A3, 10 for A4 */
> gpios = <&gpio6 16 GPIO_ACTIVE_HIGH>;
> gpio-key,wakeup;
> };
> };
>
> sound {
> compatible = "ti,omap-twl4030";
> ti,model = "gta04";
>
> ti,mcbsp = <&mcbsp2>;
> ti,codec = <&twl_audio>;
> };
>
> panel {
> compatible = "tpo,td028ttec1";
> display-name = "lcd";
> source = "dpi.0";
> data-lines = <24>;
> cs-gpio = <&gpio1 19 0>;
> scl-gpio = <&gpio1 12 0>;
> din-gpio = <&gpio1 18 0>;
> dout-gpio = <&gpio1 20 0>;
> };
>
> backlight {
> compatible = "pwm-backlight";
> label = "pwm-backlight";
> pwms = <&pwm 0 2000000>;
> brightness-levels = <0 11 20 30 40 50 60 70 80 90 100>;
> default-brightness-level = <10>;
> };
>
> pwm: omap-pwm {
> compatible = "ti,omap-pwm";
> timers = <&timer11>;
> #pwm-cells = <2>;
> };
>
> /* need to connect uart1 DTR line to vaux4 */
> btdtr: gpio-reg.bt {
> compatible = "gpio_regulator";
> vgpio-supply = <&vaux4>;
> microvolt = <3150000>;
> gpio-controller;
> #gpio-cells = <2>;
> };
>
> gps-rfkill {
> compatible = "rfkill-regulator";
> label = "GPS";
> type = <RFKILL_TYPE_GPS>;
> vrfkill-supply = <&vsim>;
> };
>
> gpsdtr: gps-onoff {
> compatible = "gpio-w2sg0004";
> gpios = <&gpio5 17 0>, <&gpio5 19 0>;
> /* MODE0 PULL_ENA(8) INPUT_EN(256) PULL_UP(16) */
> state-on = <280>;
> /* MODE4 PULL_ENA(8) INPUT_EN(256) PULL_UP(16) */
> state-off = <284>;
> gpio-controller;
> #gpio-cells = <2>;
> };
> };
>
> &omap3_pmx_core {
> uart1_pins: pinmux_uart1_pins {
> pinctrl-single,pins = <
> 0x152 (PIN_INPUT | MUX_MODE0) /* uart1_rx.uart1_rx */
> 0x14c (PIN_OUTPUT |MUX_MODE0) /* uart1_tx.uart1_tx */
> >;
> };
>
> uart2_pins: pinmux_uart2_pins {
> pinctrl-single,pins = <
> 0x14a (PIN_INPUT | MUX_MODE0) /* uart2_rx.uart2_rx */
> 0x148 (PIN_OUTPUT | MUX_MODE0) /* uart2_tx.uart2_tx */
> >;
> };
>
> uart3_pins: pinmux_uart3_pins {
> pinctrl-single,pins = <
> 0x16e (PIN_INPUT | MUX_MODE0) /* uart3_rx.uart3_rx */
> 0x170 (PIN_OUTPUT | MUX_MODE0) /* uart3_tx.uart3_tx */
> >;
> };
>
> mmc1_pins: pinmux_mmc1_pins {
> pinctrl-single,pins = <
> 0x114 (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc1_clk.sdmmc1_clk */
> 0x116 (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc1_cmd.sdmmc1_cmd */
> 0x118 (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc1_dat0.sdmmc1_dat0 */
> 0x11a (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc1_dat1.sdmmc1_dat1 */
> 0x11c (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc1_dat2.sdmmc1_dat2 */
> 0x11e (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc1_dat3.sdmmc1_dat3 */
> >;
> };
> mmc2_pins: pinmux_mmc2_pins {
> pinctrl-single,pins = <
> 0x128 (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc2_clk.sdmmc2_clk */
> 0x12a (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc2_cmd.sdmmc2_cmd */
> 0x12c (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc2_dat0.sdmmc2_dat0 */
> 0x12e (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc2_dat1.sdmmc2_dat1 */
> 0x130 (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc2_dat2.sdmmc2_dat2 */
> 0x132 (PIN_INPUT_PULLUP | MUX_MODE0) /* sdmmc2_dat3.sdmmc1_dat3 */
> >;
> };
> mmc2_cirq_pin: pinmux_cirq_pin {
> pinctrl-single,pins = <
> 0x012e (PIN_INPUT_PULLUP | MUX_MODE4) /* MMC2_DAT1 as GPIO5_5 */
> >;
> };
> };
>
> &i2c1 {
> clock-frequency = <2600000>;
>
> twl: twl at 48 {
> reg = <0x48>;
> interrupts = <7>; /* SYS_NIRQ cascaded to intc */
> interrupt-parent = <&intc>;
>
> twl_audio: audio {
> compatible = "ti,twl4030-audio";
> codec {
> };
> };
> vaux4: regulator-vaux4 {
> compatible = "ti,twl4030-vaux4";
> regulator-min-microvolt = <2800000>;
> regulator-max-microvolt = <3150000>;
> ti,allow_unsupported;
> };
> };
> };
>
> #include "twl4030.dtsi"
> #include "twl4030_omap3.dtsi"
>
> &i2c2 {
> clock-frequency = <400000>;
>
> /* touch screen */
> tsc2007: tsc2007 at 48 {
> compatible = "tsc2007";
> reg = <0x48>;
> interrupt-parent = <&gpio6>;
> interrupts = <0 IRQ_TYPE_EDGE_FALLING>;
> model-number = <2007>;
> x-plate-ohms = <600>;
> pen-gpio = <&gpio6 0 GPIO_ACTIVE_LOW>;
> };
>
> /* pressure sensor */
> bmp085 at 77 {
> compatible = "bosch,bmp085";
> reg = <0x77>;
> };
>
> /* accelerometer */
> bma180 at 41 {
> compatible = "bosch,bma180";
> reg = <0x41>;
> interrupt-parent = <&gpio3>;
> interrupts = <19 IRQ_TYPE_LEVEL_HIGH>;
> };
>
> /* leds */
> tca: tca6507 at 45 {
> compatible = "ti,tca6507";
> #address-cells = <1>;
> #size-cells = <0>;
> reg = <0x45>;
>
> gpio-controller;
> #gpio-cells = <2>;
>
> gta04_led0: red_aux at 0 {
> label = "gta04:red:aux";
> reg = <0x0>;
> };
>
> gta04_led1: green_aux at 1 {
> label = "gta04:green:aux";
> reg = <0x1>;
> };
>
> gta04_led3: red_power at 3 {
> label = "gta04:red:power";
> reg = <0x3>;
> linux,default-trigger = "default-on";
> };
>
> gta04_led4: green_power at 4 {
> label = "gta04:green:power";
> reg = <0x4>;
> };
>
> wifi_reset at 6 {
> label = "gta04:wlan:reset";
> reg = <0x6>;
> make-gpio;
> };
> };
>
> /* gyroscope */
> itg3200 at 68 {
> compatible = "invensense,itg3200";
> reg = <0x68>;
> };
>
> /* compass aka magnetometer */
> hmc5843 at 1e {
> compatible = "honeywell,hmc5843";
> reg = <0x1e>;
> };
> };
>
> &i2c3 {
> clock-frequency = <100000>;
> };
>
> &usb_otg_hs {
> interface-type = <0>;
> usb-phy = <&usb2_phy>;
> mode = <3>;
> power = <50>;
> };
>
> &mmc1 {
> pinctrl-names = "default";
> pinctrl-0 = <&mmc1_pins>;
> vmmc-supply = <&vmmc1>;
> bus-width = <4>;
> ti,non-removable;
> cap-power-off-card;
> };
>
> &mmc2 {
> vmmc-supply = <&vaux4>;
> bus-width = <4>;
> ti,non-removable;
> cap-power-off-card;
> reset-gpios = <&tca 0 GPIO_ACTIVE_HIGH>;
>
> ti,quirk-swakeup-missing;
> pinctrl-names = "default", "active", "idle";
> pinctrl-0 = <&mmc2_pins>;
> pinctrl-1 = <&mmc2_pins>;
> pinctrl-2 = <&mmc2_cirq_pin>;
> ti,cirq-gpio = <&gpio5 5 0>; /* GPIO133 = 128+5 */
> };
>
> &mmc3 {
> status = "disabled";
> };
>
> &uart1 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart1_pins>;
> };
>
> &uart2 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart2_pins>;
> };
>
> &uart3 {
> pinctrl-names = "default";
> pinctrl-0 = <&uart3_pins>;
> };
>
> &charger {
> bb_uvolt = <3200000>;
> bb_uamp = <150>;
> };
>
> &twl_power {
> ti,use_poweroff;
> };
>
> &vpll2 {
> supply-dev = "omapdss_dpi.0";
> supply = "vdds_dsi";
> };
>
> /* uart1 is bluetooth - need to connect DTR */
> &uart1 {
> dtr = <&btdtr 0 GPIO_ACTIVE_HIGH>;
> };
> &uart2 {
> dtr = <&gpsdtr 0 GPIO_ACTIVE_HIGH>;
> };
>
> &vsim {
> regulator-min-microvolt = <2800000>;
> regulator-max-microvolt = <2800000>;
> };
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