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MMC: davinici_mmc: Enable CD and WP with DM and OF_CONTROL

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When used with a device tree, this will extract the card detect
and write protect pins from the device tree and configure them
accordingly.  This assumes the GPIO_ACTIVE_LOW/HIGH is supported
by da8xx_gpio.

Signed-off-by: Adam Ford <aford173@gmail.com>
This commit is contained in:
Adam Ford 2018-09-03 03:47:52 -05:00 committed by Tom Rini
parent 819ad5f625
commit 04355de71d
1 changed files with 41 additions and 0 deletions
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41
drivers/mmc/davinci_mmc.c
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@ -15,6 +15,7 @@
#include <malloc.h>
#include <asm/io.h>
#include <asm/arch/sdmmc_defs.h>
#include <asm-generic/gpio.h>
#define DAVINCI_MAX_BLOCKS (32)
#define WATCHDOG_COUNT (100000)
@ -35,6 +36,8 @@ struct davinci_mmc_priv {
struct davinci_mmc_regs *reg_base; /* Register base address */
uint input_clk; /* Input clock to MMC controller */
uint version; /* MMC Controller version */
struct gpio_desc cd_gpio; /* Card Detect GPIO */
struct gpio_desc wp_gpio; /* Write Protect GPIO */
};
struct davinci_mmc_plat
@ -425,9 +428,41 @@ static const struct mmc_ops dmmc_ops = {
.init = dmmc_init,
};
#else
static int davinci_mmc_getcd(struct udevice *dev)
{
int value = -1;
#if CONFIG_IS_ENABLED(DM_GPIO)
struct davinci_mmc_priv *priv = dev_get_priv(dev);
value = dm_gpio_get_value(&priv->cd_gpio);
#endif
/* if no CD return as 1 */
if (value < 0)
return 1;
return value;
}
static int davinci_mmc_getwp(struct udevice *dev)
{
int value = -1;
#if CONFIG_IS_ENABLED(DM_GPIO)
struct davinci_mmc_priv *priv = dev_get_priv(dev);
value = dm_gpio_get_value(&priv->wp_gpio);
#endif
/* if no WP return as 0 */
if (value < 0)
return 0;
return value;
}
static const struct dm_mmc_ops davinci_mmc_ops = {
.send_cmd = davinci_mmc_send_cmd,
.set_ios = davinci_mmc_set_ios,
.get_cd = davinci_mmc_getcd,
.get_wp = davinci_mmc_getwp,
};
#endif
@ -475,6 +510,12 @@ static int davinci_mmc_probe(struct udevice *dev)
priv->reg_base = (struct davinci_mmc_regs *)dev_read_addr(dev);
priv->input_clk = clk_get(DAVINCI_MMCSD_CLKID);
#if CONFIG_IS_ENABLED(DM_GPIO)
/* These GPIOs are optional */
gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio, GPIOD_IS_IN);
gpio_request_by_name(dev, "wp-gpios", 0, &priv->wp_gpio, GPIOD_IS_IN);
#endif
upriv->mmc = &plat->mmc;
return davinci_dm_mmc_init(dev);