Axe Yang 527f36f5ef mmc: mediatek: add support for SDIO eint wakup IRQ ... 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> Reviewed-by: Chaotian Jing <chaotian.jing@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Axe Yang <axe.yang@mediatek.com> Link: https://lore.kernel.org/r/20220726062842.18846-4-axe.yang@mediatek.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>		2022-07-26 16:58:32 +02:00
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core	mmc: core: Add support for SDIO wakeup interrupt	2022-07-26 16:58:31 +02:00
host	mmc: mediatek: add support for SDIO eint wakup IRQ	2022-07-26 16:58:32 +02:00
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