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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2012-02-09 22:57:09 +0100
committerChris Ball <cjb@laptop.org>2012-03-27 12:20:15 -0400
commitc8be24c2afd3ed2445bbf8f542af35a9787fc0e8 (patch)
treee0e757bb3b6a45f55eef145484ca5707d9e45fa8 /include/linux/mfd
parent2b1ac5c2caccbfd43bd616321cbbe21eb33c7879 (diff)
mmc: tmio_mmc: support the generic MMC GPIO card hotplug helper
If the platform specifies the TMIO_MMC_HAS_COLD_CD flag, use the generic MMC GPIO card hotplug helper. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mfd')
-rw-r--r--include/linux/mfd/tmio.h25
1 files changed, 19 insertions, 6 deletions
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 0dc98044d8b..5a197de4aac 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -1,8 +1,10 @@
#ifndef MFD_TMIO_H
#define MFD_TMIO_H
+#include <linux/device.h>
#include <linux/fb.h>
#include <linux/io.h>
+#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
@@ -64,8 +66,8 @@
#define TMIO_MMC_SDIO_IRQ (1 << 2)
/*
* Some platforms can detect card insertion events with controller powered
- * down, in which case they have to call tmio_mmc_cd_wakeup() to power up the
- * controller and report the event to the driver.
+ * down, using a GPIO IRQ, in which case they have to fill in cd_irq, cd_gpio,
+ * and cd_flags fields of struct tmio_mmc_data.
*/
#define TMIO_MMC_HAS_COLD_CD (1 << 3)
/*
@@ -73,6 +75,12 @@
* idle before writing to some registers.
*/
#define TMIO_MMC_HAS_IDLE_WAIT (1 << 4)
+/*
+ * A GPIO is used for card hotplug detection. We need an extra flag for this,
+ * because 0 is a valid GPIO number too, and requiring users to specify
+ * cd_gpio < 0 to disable GPIO hotplug would break backwards compatibility.
+ */
+#define TMIO_MMC_USE_GPIO_CD (1 << 5)
int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base);
int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base);
@@ -98,18 +106,23 @@ struct tmio_mmc_data {
struct tmio_mmc_dma *dma;
struct device *dev;
bool power;
+ unsigned int cd_gpio;
void (*set_pwr)(struct platform_device *host, int state);
void (*set_clk_div)(struct platform_device *host, int state);
int (*get_cd)(struct platform_device *host);
int (*write16_hook)(struct tmio_mmc_host *host, int addr);
};
+/*
+ * This function is deprecated and will be removed soon. Please, convert your
+ * platform to use drivers/mmc/core/cd-gpio.c
+ */
+#include <linux/mmc/host.h>
static inline void tmio_mmc_cd_wakeup(struct tmio_mmc_data *pdata)
{
- if (pdata && !pdata->power) {
- pdata->power = true;
- pm_runtime_get(pdata->dev);
- }
+ if (pdata)
+ mmc_detect_change(dev_get_drvdata(pdata->dev),
+ msecs_to_jiffies(100));
}
/*