On Friday 18 October 2013 11:50 AM, NeilBrown wrote:
On Sat, 5 Oct 2013 13:17:09 +0200 Andreas Fenkart <afenkart@xxxxxxxxx> 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@xxxxxxxxx> 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@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!). I added: mmc2_cirq_pin: pinmux_cirq_pin { pinctrl-single,pins = < 0x012e (PIN_INPUT_PULLUP | MUX_MODE4) /* MMC2_DAT1 as GPIO5_5 */ >; }; and &mmc2 { 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 */ }; to my dts file but it doesn't make any apparent difference. Any idea what I might be doing wrong? (the base kernel I am applying patches to is from 8th Oct, commit 0e7a3ed04f0cd4311096d691888f88569310ee6c) BTW, - with the default polling, I get about 1Mb/sec with iperf - with sd-irq enabled and FCLK kept on the whole time, I get 4Mb/sec - with sd-irq enable, FCLK kept on, and the 5ms polling also running, I get over 5Mb/sec! Still much less than the 40Mb/sec that I would like to get...
(removing svenkatr@xxxxxx) Hi, Can you check if you have bus-width property set ? bus-width = <4>; Thanks and Regards, Balaji T K
Thanks, NeilBrown
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