On Fri, Oct 18, 2013 at 8:20 AM, NeilBrown <neilb@xxxxxxx> 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!).
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?
Thanks a lot and best regards,
Javier
> 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...
>
> Thanks,
> NeilBrown
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