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of_mmc_spi: add card detect irq support

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Signed-off-by: Esben Haabendal <eha@doredevelopment.dk>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Esben Haabendal 2011-03-07 20:45:28 -07:00 committed by Grant Likely
parent adef658ddf
commit 290293eda2
2 changed files with 32 additions and 3 deletions
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9
Documentation/powerpc/dts-bindings/mmc-spi-slot.txt
View file

@ -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>;
};

24
drivers/mmc/host/of_mmc_spi.c
View file

@ -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->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;