lkml.org 
[lkml]   [2022]   [Jul]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v13 3/3] mmc: mediatek: add support for SDIO eint wakup IRQ
From
Il 23/06/22 11:04, Axe Yang ha scritto:
> Add support for eint IRQ when MSDC is used as an SDIO host. This
> feature requires SDIO device support async IRQ function. With this
> feature, SDIO host can be awakened by SDIO card in suspend state,
> without additional pin.
>
> MSDC driver will time-share the SDIO DAT1 pin. During suspend, MSDC
> turn off clock and switch SDIO DAT1 pin to GPIO mode. And during
> resume, switch GPIO function back to DAT1 mode then turn on clock.
>
> Some device tree property should be added or modified in MSDC node
> to support SDIO eint IRQ. Pinctrls "state_eint" is mandatory. Since
> this feature depends on asynchronous interrupts, "wakeup-source",
> "keep-power-in-suspend" and "cap-sdio-irq" flags are necessary, and
> the interrupts list should be extended(the interrupt named with
> sdio_wakeup):
> &mmcX {
> ...
> interrupt-names = "msdc", "sdio_wakeup";
> interrupts-extended = <...>,
> <&pio xxx IRQ_TYPE_LEVEL_LOW>;
> ...
> pinctrl-names = "default", "state_uhs", "state_eint";
> ...
> pinctrl-2 = <&mmc2_pins_eint>;
> ...
> cap-sdio-irq;
> keep-power-in-suspend;
> wakeup-source;
> ...
> };
>
> Co-developed-by: Yong Mao <yong.mao@mediatek.com>
> Signed-off-by: Yong Mao <yong.mao@mediatek.com>
> Signed-off-by: Axe Yang <axe.yang@mediatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

\
 
 \ /
  Last update: 2022-07-15 10:41    [W:0.192 / U:0.740 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site