diff options
| -rw-r--r-- | drivers/mmc/core/Makefile | 2 | ||||
| -rw-r--r-- | drivers/mmc/core/pwrseq.c | 61 | ||||
| -rw-r--r-- | drivers/mmc/core/pwrseq.h | 2 | ||||
| -rw-r--r-- | drivers/mmc/core/pwrseq_simple.c | 48 |
4 files changed, 111 insertions, 2 deletions
diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile index ccdd35f78256..b39cbd2f830b 100644 --- a/drivers/mmc/core/Makefile +++ b/drivers/mmc/core/Makefile @@ -8,5 +8,5 @@ mmc_core-y := core.o bus.o host.o \ sdio.o sdio_ops.o sdio_bus.o \ sdio_cis.o sdio_io.o sdio_irq.o \ quirks.o slot-gpio.o -mmc_core-$(CONFIG_OF) += pwrseq.o +mmc_core-$(CONFIG_OF) += pwrseq.o pwrseq_simple.o mmc_core-$(CONFIG_DEBUG_FS) += debugfs.o diff --git a/drivers/mmc/core/pwrseq.c b/drivers/mmc/core/pwrseq.c index bd087723929f..2cea00ed4e65 100644 --- a/drivers/mmc/core/pwrseq.c +++ b/drivers/mmc/core/pwrseq.c @@ -7,14 +7,73 @@ * * MMC power sequence management */ +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/of_platform.h> + #include <linux/mmc/host.h> #include "pwrseq.h" +struct mmc_pwrseq_match { + const char *compatible; + int (*alloc)(struct mmc_host *host, struct device *dev); +}; + +static struct mmc_pwrseq_match pwrseq_match[] = { + { + .compatible = "mmc-pwrseq-simple", + .alloc = mmc_pwrseq_simple_alloc, + }, +}; + +static struct mmc_pwrseq_match *mmc_pwrseq_find(struct device_node *np) +{ + struct mmc_pwrseq_match *match = ERR_PTR(-ENODEV); + int i; + + for (i = 0; i < ARRAY_SIZE(pwrseq_match); i++) { + if (of_device_is_compatible(np, pwrseq_match[i].compatible)) { + match = &pwrseq_match[i]; + break; + } + } + + return match; +} int mmc_pwrseq_alloc(struct mmc_host *host) { - return 0; + struct platform_device *pdev; + struct device_node *np; + struct mmc_pwrseq_match *match; + int ret = 0; + + np = of_parse_phandle(host->parent->of_node, "mmc-pwrseq", 0); + if (!np) + return 0; + + pdev = of_find_device_by_node(np); + if (!pdev) { + ret = -ENODEV; + goto err; + } + + match = mmc_pwrseq_find(np); + if (IS_ERR(match)) { + ret = PTR_ERR(match); + goto err; + } + + ret = match->alloc(host, &pdev->dev); + if (!ret) + dev_info(host->parent, "allocated mmc-pwrseq\n"); + +err: + of_node_put(np); + return ret; } void mmc_pwrseq_pre_power_on(struct mmc_host *host) diff --git a/drivers/mmc/core/pwrseq.h b/drivers/mmc/core/pwrseq.h index 12aaf2b4745b..bd860d88f116 100644 --- a/drivers/mmc/core/pwrseq.h +++ b/drivers/mmc/core/pwrseq.h @@ -27,6 +27,8 @@ void mmc_pwrseq_post_power_on(struct mmc_host *host); void mmc_pwrseq_power_off(struct mmc_host *host); void mmc_pwrseq_free(struct mmc_host *host); +int mmc_pwrseq_simple_alloc(struct mmc_host *host, struct device *dev); + #else static inline int mmc_pwrseq_alloc(struct mmc_host *host) { return 0; } diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c new file mode 100644 index 000000000000..61c991e4009d --- /dev/null +++ b/drivers/mmc/core/pwrseq_simple.c @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2014 Linaro Ltd + * + * Author: Ulf Hansson <ulf.hansson@linaro.org> + * + * License terms: GNU General Public License (GPL) version 2 + * + * Simple MMC power sequence management + */ +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/device.h> +#include <linux/err.h> + +#include <linux/mmc/host.h> + +#include "pwrseq.h" + +struct mmc_pwrseq_simple { + struct mmc_pwrseq pwrseq; +}; + +static void mmc_pwrseq_simple_free(struct mmc_host *host) +{ + struct mmc_pwrseq_simple *pwrseq = container_of(host->pwrseq, + struct mmc_pwrseq_simple, pwrseq); + + kfree(pwrseq); + host->pwrseq = NULL; +} + +static struct mmc_pwrseq_ops mmc_pwrseq_simple_ops = { + .free = mmc_pwrseq_simple_free, +}; + +int mmc_pwrseq_simple_alloc(struct mmc_host *host, struct device *dev) +{ + struct mmc_pwrseq_simple *pwrseq; + + pwrseq = kzalloc(sizeof(struct mmc_pwrseq_simple), GFP_KERNEL); + if (!pwrseq) + return -ENOMEM; + + pwrseq->pwrseq.ops = &mmc_pwrseq_simple_ops; + host->pwrseq = &pwrseq->pwrseq; + + return 0; +} |