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mmc: spi: Convert to use GPIO descriptors

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Switch the SPI MMC driver to use GPIO descriptors internally
and just look those up using the standard slot GPIO
functions mmc_gpiod_request_cd() and mmc_gpiod_request_ro().
Make sure to request index 0 and 1 in accordance with the
SPI MMC DT binding, and add the same GPIOs in machine
descriptor tables on all boards that use SPI MMC in
board files.

The lines are flagged as GPIO_ACTIVE_[LOW|HIGH] as that is
what they are, and since we can now rely on the descriptors
to have the right polarity, we set the
"override_active_level" to false in mmc_gpiod_request_cd()
and mmc_gpiod_request_ro().

Cc: Hartley Sweeten <hsweeten@visionengravers.com> # Vision EP9307
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Linus Walleij
2018-12-02 09:43:18 +01:00
committed by Ulf Hansson
parent b0d06f1cb0
commit 5716fb9bd9
6 changed files with 53 additions and 71 deletions
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27
drivers/mmc/host/mmc_spi.c
View File

@@ -1434,13 +1434,16 @@ static int mmc_spi_probe(struct spi_device *spi)
if (status != 0)
goto fail_add_host;
if (host->pdata && host->pdata->flags & MMC_SPI_USE_CD_GPIO) {
status = mmc_gpio_request_cd(mmc, host->pdata->cd_gpio,
host->pdata->cd_debounce);
if (status != 0)
goto fail_add_host;
/* The platform has a CD GPIO signal that may support
/*
* Index 0 is card detect
* Old boardfiles were specifying 1 ms as debounce
*/
status = mmc_gpiod_request_cd(mmc, NULL, 0, false, 1, NULL);
if (status == -EPROBE_DEFER)
goto fail_add_host;
if (!status) {
/*
* The platform has a CD GPIO signal that may support
* interrupts, so let mmc_gpiod_request_cd_irq() decide
* if polling is needed or not.
*/
@@ -1448,12 +1451,12 @@ static int mmc_spi_probe(struct spi_device *spi)
mmc_gpiod_request_cd_irq(mmc);
}
if (host->pdata && host->pdata->flags & MMC_SPI_USE_RO_GPIO) {
/* Index 1 is write protect/read only */
status = mmc_gpiod_request_ro(mmc, NULL, 1, false, 0, NULL);
if (status == -EPROBE_DEFER)
goto fail_add_host;
if (!status)
has_ro = true;
status = mmc_gpio_request_ro(mmc, host->pdata->ro_gpio);
if (status != 0)
goto fail_add_host;
}
dev_info(&spi->dev, "SD/MMC host %s%s%s%s%s\n",
dev_name(&mmc->class_dev),