diff options
Diffstat (limited to 'drivers/mmc/core/pwrseq_sd8787.c')
| -rw-r--r-- | drivers/mmc/core/pwrseq_sd8787.c | 37 |
1 files changed, 32 insertions, 5 deletions
diff --git a/drivers/mmc/core/pwrseq_sd8787.c b/drivers/mmc/core/pwrseq_sd8787.c index 68a826f1c0a1..30282155a0e1 100644 --- a/drivers/mmc/core/pwrseq_sd8787.c +++ b/drivers/mmc/core/pwrseq_sd8787.c @@ -14,6 +14,7 @@ #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/module.h> +#include <linux/of.h> #include <linux/slab.h> #include <linux/device.h> #include <linux/err.h> @@ -49,13 +50,37 @@ static void mmc_pwrseq_sd8787_power_off(struct mmc_host *host) gpiod_set_value_cansleep(pwrseq->reset_gpio, 0); } +static void mmc_pwrseq_wilc1000_pre_power_on(struct mmc_host *host) +{ + struct mmc_pwrseq_sd8787 *pwrseq = to_pwrseq_sd8787(host->pwrseq); + + /* The pwrdn_gpio is really CHIP_EN, reset_gpio is RESETN */ + gpiod_set_value_cansleep(pwrseq->pwrdn_gpio, 1); + msleep(5); + gpiod_set_value_cansleep(pwrseq->reset_gpio, 1); +} + +static void mmc_pwrseq_wilc1000_power_off(struct mmc_host *host) +{ + struct mmc_pwrseq_sd8787 *pwrseq = to_pwrseq_sd8787(host->pwrseq); + + gpiod_set_value_cansleep(pwrseq->reset_gpio, 0); + gpiod_set_value_cansleep(pwrseq->pwrdn_gpio, 0); +} + static const struct mmc_pwrseq_ops mmc_pwrseq_sd8787_ops = { .pre_power_on = mmc_pwrseq_sd8787_pre_power_on, .power_off = mmc_pwrseq_sd8787_power_off, }; +static const struct mmc_pwrseq_ops mmc_pwrseq_wilc1000_ops = { + .pre_power_on = mmc_pwrseq_wilc1000_pre_power_on, + .power_off = mmc_pwrseq_wilc1000_power_off, +}; + static const struct of_device_id mmc_pwrseq_sd8787_of_match[] = { - { .compatible = "mmc-pwrseq-sd8787",}, + { .compatible = "mmc-pwrseq-sd8787", .data = &mmc_pwrseq_sd8787_ops }, + { .compatible = "mmc-pwrseq-wilc1000", .data = &mmc_pwrseq_wilc1000_ops }, {/* sentinel */}, }; MODULE_DEVICE_TABLE(of, mmc_pwrseq_sd8787_of_match); @@ -64,11 +89,14 @@ static int mmc_pwrseq_sd8787_probe(struct platform_device *pdev) { struct mmc_pwrseq_sd8787 *pwrseq; struct device *dev = &pdev->dev; + const struct of_device_id *match; pwrseq = devm_kzalloc(dev, sizeof(*pwrseq), GFP_KERNEL); if (!pwrseq) return -ENOMEM; + match = of_match_node(mmc_pwrseq_sd8787_of_match, pdev->dev.of_node); + pwrseq->pwrdn_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_LOW); if (IS_ERR(pwrseq->pwrdn_gpio)) return PTR_ERR(pwrseq->pwrdn_gpio); @@ -78,20 +106,18 @@ static int mmc_pwrseq_sd8787_probe(struct platform_device *pdev) return PTR_ERR(pwrseq->reset_gpio); pwrseq->pwrseq.dev = dev; - pwrseq->pwrseq.ops = &mmc_pwrseq_sd8787_ops; + pwrseq->pwrseq.ops = match->data; pwrseq->pwrseq.owner = THIS_MODULE; platform_set_drvdata(pdev, pwrseq); return mmc_pwrseq_register(&pwrseq->pwrseq); } -static int mmc_pwrseq_sd8787_remove(struct platform_device *pdev) +static void mmc_pwrseq_sd8787_remove(struct platform_device *pdev) { struct mmc_pwrseq_sd8787 *pwrseq = platform_get_drvdata(pdev); mmc_pwrseq_unregister(&pwrseq->pwrseq); - - return 0; } static struct platform_driver mmc_pwrseq_sd8787_driver = { @@ -104,4 +130,5 @@ static struct platform_driver mmc_pwrseq_sd8787_driver = { }; module_platform_driver(mmc_pwrseq_sd8787_driver); +MODULE_DESCRIPTION("Power sequence support for Marvell SD8787 BT + Wifi chip"); MODULE_LICENSE("GPL v2"); |