Messages in this thread Patch in this message | | | From | Masahiro Yamada <> | Subject | [PATCH v2 10/22] mmc: tmio: support IP-builtin card detection logic | Date | Sat, 25 Nov 2017 01:24:45 +0900 |
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A card detect GPIO is set up only for platforms with "cd-gpios" DT property or TMIO_MMC_USE_GPIO_CD flag. However, the driver core always uses mmc_gpio_get_cd, which just fails with -ENOSYS if ctx->cd_gpio is unset.
The bit 5 of the status register provides the current signal level of the CD line. Allow to use it if the GPIO is unused.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> ---
Changes in v2: None
drivers/mmc/host/tmio_mmc_core.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c index 610f26f..b51bb06 100644 --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -1087,6 +1087,19 @@ static int tmio_mmc_get_ro(struct mmc_host *mmc) return ret; } +static int tmio_mmc_get_cd(struct mmc_host *mmc) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + int ret; + + ret = mmc_gpio_get_cd(mmc); + if (ret >= 0) + return ret; + + return !!(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & + TMIO_STAT_SIGSTATE); +} + static int tmio_multi_io_quirk(struct mmc_card *card, unsigned int direction, int blk_size) { @@ -1102,7 +1115,7 @@ static const struct mmc_host_ops tmio_mmc_ops = { .request = tmio_mmc_request, .set_ios = tmio_mmc_set_ios, .get_ro = tmio_mmc_get_ro, - .get_cd = mmc_gpio_get_cd, + .get_cd = tmio_mmc_get_cd, .enable_sdio_irq = tmio_mmc_enable_sdio_irq, .multi_io_quirk = tmio_multi_io_quirk, .hw_reset = tmio_mmc_hw_reset, -- 2.7.4
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