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| author | Esben Haabendal <eha@doredevelopment.dk> | 2011-03-07 20:45:28 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-03-07 20:45:28 -0700 |
| commit | 290293eda2c6dd368476d71433bdef07c39a6829 (patch) | |
| tree | 3bc7815356d324774f85526ea18586e37146bb38 | |
| parent | adef658ddf71e709eb1bdc181b86c62b933b967b (diff) | |
| download | linux-stable-290293eda2c6dd368476d71433bdef07c39a6829.tar.gz linux-stable-290293eda2c6dd368476d71433bdef07c39a6829.tar.bz2 linux-stable-290293eda2c6dd368476d71433bdef07c39a6829.zip | |
of_mmc_spi: add card detect irq support
Signed-off-by: Esben Haabendal <eha@doredevelopment.dk>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| -rw-r--r-- | Documentation/powerpc/dts-bindings/mmc-spi-slot.txt | 9 | ||||
| -rw-r--r-- | drivers/mmc/host/of_mmc_spi.c | 26 |
2 files changed, 32 insertions, 3 deletions
diff --git a/Documentation/powerpc/dts-bindings/mmc-spi-slot.txt b/Documentation/powerpc/dts-bindings/mmc-spi-slot.txt index c39ac2891951..89a0084df2f7 100644 --- a/Documentation/powerpc/dts-bindings/mmc-spi-slot.txt +++ b/Documentation/powerpc/dts-bindings/mmc-spi-slot.txt @@ -7,8 +7,13 @@ Required properties: - voltage-ranges : two cells are required, first cell specifies minimum slot voltage (mV), second cell specifies maximum slot voltage (mV). Several ranges could be specified. -- gpios : (optional) may specify GPIOs in this order: Card-Detect GPIO, + +Optional properties: +- gpios : may specify GPIOs in this order: Card-Detect GPIO, Write-Protect GPIO. +- interrupts : the interrupt of a card detect interrupt. +- interrupt-parent : the phandle for the interrupt controller that + services interrupts for this device. Example: @@ -20,4 +25,6 @@ Example: &qe_pio_d 15 0>; voltage-ranges = <3300 3300>; spi-max-frequency = <50000000>; + interrupts = <42>; + interrupt-parent = <&PIC>; }; diff --git a/drivers/mmc/host/of_mmc_spi.c b/drivers/mmc/host/of_mmc_spi.c index 1247e5de9faa..5530def54e5b 100644 --- a/drivers/mmc/host/of_mmc_spi.c +++ b/drivers/mmc/host/of_mmc_spi.c @@ -34,6 +34,7 @@ enum { struct of_mmc_spi { int gpios[NUM_GPIOS]; bool alow_gpios[NUM_GPIOS]; + int detect_irq; struct mmc_spi_platform_data pdata; }; @@ -61,6 +62,22 @@ static int of_mmc_spi_get_ro(struct device *dev) return of_mmc_spi_read_gpio(dev, WP_GPIO); } +static int of_mmc_spi_init(struct device *dev, + irqreturn_t (*irqhandler)(int, void *), void *mmc) +{ + struct of_mmc_spi *oms = to_of_mmc_spi(dev); + + return request_threaded_irq(oms->detect_irq, NULL, irqhandler, 0, + dev_name(dev), mmc); +} + +static void of_mmc_spi_exit(struct device *dev, void *mmc) +{ + struct of_mmc_spi *oms = to_of_mmc_spi(dev); + + free_irq(oms->detect_irq, mmc); +} + struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi) { struct device *dev = &spi->dev; @@ -121,8 +138,13 @@ struct mmc_spi_platform_data *mmc_spi_get_pdata(struct spi_device *spi) if (gpio_is_valid(oms->gpios[WP_GPIO])) oms->pdata.get_ro = of_mmc_spi_get_ro; - /* We don't support interrupts yet, let's poll. */ - oms->pdata.caps |= MMC_CAP_NEEDS_POLL; + oms->detect_irq = irq_of_parse_and_map(np, 0); + if (oms->detect_irq != NO_IRQ) { + oms->pdata.init = of_mmc_spi_init; + oms->pdata.exit = of_mmc_spi_exit; + } else { + oms->pdata.caps |= MMC_CAP_NEEDS_POLL; + } dev->platform_data = &oms->pdata; return dev->platform_data; |