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Commit 290293ed authored by Esben Haabendal's avatar Esben Haabendal Committed by Grant Likely
Browse files

of_mmc_spi: add card detect irq support

parent adef658d
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+8 −1
Original line number Diff line number Diff line
@@ -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 −2
Original line number Diff line number Diff line
@@ -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;