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path: root/drivers/mmc/host/mvsdio.c
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Diffstat (limited to 'drivers/mmc/host/mvsdio.c')
-rw-r--r--drivers/mmc/host/mvsdio.c131
1 files changed, 65 insertions, 66 deletions
diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c
index f8dd36102949..145cdaf000d1 100644
--- a/drivers/mmc/host/mvsdio.c
+++ b/drivers/mmc/host/mvsdio.c
@@ -21,7 +21,11 @@
#include <linux/irq.h>
#include <linux/clk.h>
#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/of_irq.h>
#include <linux/mmc/host.h>
+#include <linux/mmc/slot-gpio.h>
+#include <linux/pinctrl/consumer.h>
#include <asm/sizes.h>
#include <asm/unaligned.h>
@@ -51,8 +55,6 @@ struct mvsd_host {
struct mmc_host *mmc;
struct device *dev;
struct clk *clk;
- int gpio_card_detect;
- int gpio_write_protect;
};
#define mvsd_write(offs, val) writel(val, iobase + (offs))
@@ -538,13 +540,6 @@ static void mvsd_timeout_timer(unsigned long data)
mmc_request_done(host->mmc, mrq);
}
-static irqreturn_t mvsd_card_detect_irq(int irq, void *dev)
-{
- struct mvsd_host *host = dev;
- mmc_detect_change(host->mmc, msecs_to_jiffies(100));
- return IRQ_HANDLED;
-}
-
static void mvsd_enable_sdio_irq(struct mmc_host *mmc, int enable)
{
struct mvsd_host *host = mmc_priv(mmc);
@@ -564,20 +559,6 @@ static void mvsd_enable_sdio_irq(struct mmc_host *mmc, int enable)
spin_unlock_irqrestore(&host->lock, flags);
}
-static int mvsd_get_ro(struct mmc_host *mmc)
-{
- struct mvsd_host *host = mmc_priv(mmc);
-
- if (host->gpio_write_protect)
- return gpio_get_value(host->gpio_write_protect);
-
- /*
- * Board doesn't support read only detection; let the mmc core
- * decide what to do.
- */
- return -ENOSYS;
-}
-
static void mvsd_power_up(struct mvsd_host *host)
{
void __iomem *iobase = host->base;
@@ -674,7 +655,7 @@ static void mvsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
static const struct mmc_host_ops mvsd_ops = {
.request = mvsd_request,
- .get_ro = mvsd_get_ro,
+ .get_ro = mmc_gpio_get_ro,
.set_ios = mvsd_set_ios,
.enable_sdio_irq = mvsd_enable_sdio_irq,
};
@@ -703,17 +684,18 @@ mv_conf_mbus_windows(struct mvsd_host *host,
static int __init mvsd_probe(struct platform_device *pdev)
{
+ struct device_node *np = pdev->dev.of_node;
struct mmc_host *mmc = NULL;
struct mvsd_host *host = NULL;
- const struct mvsdio_platform_data *mvsd_data;
const struct mbus_dram_target_info *dram;
struct resource *r;
int ret, irq;
+ int gpio_card_detect, gpio_write_protect;
+ struct pinctrl *pinctrl;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
- mvsd_data = pdev->dev.platform_data;
- if (!r || irq < 0 || !mvsd_data)
+ if (!r || irq < 0)
return -ENXIO;
mmc = mmc_alloc_host(sizeof(struct mvsd_host), &pdev->dev);
@@ -725,8 +707,43 @@ static int __init mvsd_probe(struct platform_device *pdev)
host = mmc_priv(mmc);
host->mmc = mmc;
host->dev = &pdev->dev;
- host->base_clock = mvsd_data->clock / 2;
- host->clk = ERR_PTR(-EINVAL);
+
+ pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+ if (IS_ERR(pinctrl))
+ dev_warn(&pdev->dev, "no pins associated\n");
+
+ /*
+ * Some non-DT platforms do not pass a clock, and the clock
+ * frequency is passed through platform_data. On DT platforms,
+ * a clock must always be passed, even if there is no gatable
+ * clock associated to the SDIO interface (it can simply be a
+ * fixed rate clock).
+ */
+ host->clk = devm_clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(host->clk))
+ clk_prepare_enable(host->clk);
+
+ if (np) {
+ if (IS_ERR(host->clk)) {
+ dev_err(&pdev->dev, "DT platforms must have a clock associated\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ host->base_clock = clk_get_rate(host->clk) / 2;
+ gpio_card_detect = of_get_named_gpio(np, "cd-gpios", 0);
+ gpio_write_protect = of_get_named_gpio(np, "wp-gpios", 0);
+ } else {
+ const struct mvsdio_platform_data *mvsd_data;
+ mvsd_data = pdev->dev.platform_data;
+ if (!mvsd_data) {
+ ret = -ENXIO;
+ goto out;
+ }
+ host->base_clock = mvsd_data->clock / 2;
+ gpio_card_detect = mvsd_data->gpio_card_detect;
+ gpio_write_protect = mvsd_data->gpio_write_protect;
+ }
mmc->ops = &mvsd_ops;
@@ -765,43 +782,14 @@ static int __init mvsd_probe(struct platform_device *pdev)
goto out;
}
- /* Not all platforms can gate the clock, so it is not
- an error if the clock does not exists. */
- host->clk = devm_clk_get(&pdev->dev, NULL);
- if (!IS_ERR(host->clk))
- clk_prepare_enable(host->clk);
-
- if (mvsd_data->gpio_card_detect) {
- ret = devm_gpio_request_one(&pdev->dev,
- mvsd_data->gpio_card_detect,
- GPIOF_IN, DRIVER_NAME " cd");
- if (ret == 0) {
- irq = gpio_to_irq(mvsd_data->gpio_card_detect);
- ret = devm_request_irq(&pdev->dev, irq,
- mvsd_card_detect_irq,
- IRQ_TYPE_EDGE_RISING |
- IRQ_TYPE_EDGE_FALLING,
- DRIVER_NAME " cd", host);
- if (ret == 0)
- host->gpio_card_detect =
- mvsd_data->gpio_card_detect;
- else
- devm_gpio_free(&pdev->dev,
- mvsd_data->gpio_card_detect);
- }
- }
- if (!host->gpio_card_detect)
+ if (gpio_is_valid(gpio_card_detect)) {
+ ret = mmc_gpio_request_cd(mmc, gpio_card_detect);
+ if (ret)
+ goto out;
+ } else
mmc->caps |= MMC_CAP_NEEDS_POLL;
- if (mvsd_data->gpio_write_protect) {
- ret = devm_gpio_request_one(&pdev->dev,
- mvsd_data->gpio_write_protect,
- GPIOF_IN, DRIVER_NAME " wp");
- if (ret == 0) {
- host->gpio_write_protect =
- mvsd_data->gpio_write_protect;
- }
- }
+ mmc_gpio_request_ro(mmc, gpio_write_protect);
setup_timer(&host->timer, mvsd_timeout_timer, (unsigned long)host);
platform_set_drvdata(pdev, mmc);
@@ -811,15 +799,17 @@ static int __init mvsd_probe(struct platform_device *pdev)
pr_notice("%s: %s driver initialized, ",
mmc_hostname(mmc), DRIVER_NAME);
- if (host->gpio_card_detect)
+ if (!(mmc->caps & MMC_CAP_NEEDS_POLL))
printk("using GPIO %d for card detection\n",
- host->gpio_card_detect);
+ gpio_card_detect);
else
printk("lacking card detect (fall back to polling)\n");
return 0;
out:
if (mmc) {
+ mmc_gpio_free_cd(mmc);
+ mmc_gpio_free_ro(mmc);
if (!IS_ERR(host->clk))
clk_disable_unprepare(host->clk);
mmc_free_host(mmc);
@@ -834,6 +824,8 @@ static int __exit mvsd_remove(struct platform_device *pdev)
struct mvsd_host *host = mmc_priv(mmc);
+ mmc_gpio_free_cd(mmc);
+ mmc_gpio_free_ro(mmc);
mmc_remove_host(mmc);
del_timer_sync(&host->timer);
mvsd_power_down(host);
@@ -873,12 +865,19 @@ static int mvsd_resume(struct platform_device *dev)
#define mvsd_resume NULL
#endif
+static const struct of_device_id mvsdio_dt_ids[] = {
+ { .compatible = "marvell,orion-sdio" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mvsdio_dt_ids);
+
static struct platform_driver mvsd_driver = {
.remove = __exit_p(mvsd_remove),
.suspend = mvsd_suspend,
.resume = mvsd_resume,
.driver = {
.name = DRIVER_NAME,
+ .of_match_table = mvsdio_dt_ids,
},
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 13:55:37 +0000