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| author |   Axe Yang <axe.yang@mediatek.com> | 2022-07-26 14:28:41 +0800 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2022-07-26 16:58:31 +0200 |
| commit | 019e442bb0d5e7f25ada8eb4252e22e62d17a95e (patch) | |
| tree | 7c6757688498fdf2a640ed3f042e74b6cfa3c75f /drivers/mmc/core/sdio.c | |
| parent | dt-bindings: mmc: mtk-sd: extend interrupts and pinctrls properties (diff) | |
| download | linux-dev-019e442bb0d5e7f25ada8eb4252e22e62d17a95e.tar.xz linux-dev-019e442bb0d5e7f25ada8eb4252e22e62d17a95e.zip | |
mmc: core: Add support for SDIO wakeup interrupt
If wakeup-source flag is set in host dts node, parse EAI information
from SDIO CCCR interrupt externsion segment for in-band wakeup. If
async interrupt is supported by SDIO card then enable it and set
enable_async_irq flag in sdio_cccr structure to 1. The parse flow is
implemented in sdio_read_cccr().
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Axe Yang <axe.yang@mediatek.com>
Link: https://lore.kernel.org/r/20220726062842.18846-3-axe.yang@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/sdio.c')
| -rw-r--r-- | drivers/mmc/core/sdio.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index b589df1c35e0..0b682a31cd3e 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -226,6 +226,20 @@ static int sdio_read_cccr(struct mmc_card *card, u32 ocr) card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C; if (data & SDIO_DRIVE_SDTD) card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D; + + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTERRUPT_EXT, 0, &data); + if (ret) + goto out; + + if (data & SDIO_INTERRUPT_EXT_SAI) { + data |= SDIO_INTERRUPT_EXT_EAI; + ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_INTERRUPT_EXT, + data, NULL); + if (ret) + goto out; + + card->cccr.enable_async_irq = 1; + } } /* if no uhs mode ensure we check for high speed */ |