When the omap2 nand flash driver is used, the nand-disk led trigger does not
work due to nand_wait_ready not being called.
This patch exports the trigger from nand_base.c, letting specific drivers
such omap2 control the led as appropriate.
Signed-off-by: Raphael Assenat <raph@xxxxxx>
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index a11253a..b967c45 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -103,7 +103,7 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
* For devices which display every fart in the system on a separate LED. Is
* compiled away when LED support is disabled.
*/
-DEFINE_LED_TRIGGER(nand_led_trigger);
+DEFINE_LED_TRIGGER_GLOBAL(nand_led_trigger);
static int check_offs_len(struct mtd_info *mtd,
loff_t ofs, uint64_t len)
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index ac4fd75..6aa683f 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -19,6 +19,7 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
+#include <linux/leds.h>
#include <linux/omap-dma.h>
#include <linux/io.h>
#include <linux/slab.h>
@@ -254,6 +255,8 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char *buf, int len)
int ret = 0;
u32 *p = (u32 *)buf;
+ led_trigger_event(nand_led_trigger, LED_FULL);
+
/* take care of subpage reads */
if (len % 4) {
if (info->nand.options & NAND_BUSWIDTH_16)
@@ -284,6 +287,8 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char *buf, int len)
/* disable and stop the PFPW engine */
gpmc_prefetch_reset(info->gpmc_cs);
}
+
+ led_trigger_event(nand_led_trigger, LED_OFF);
}
/**
@@ -302,6 +307,8 @@ static void omap_write_buf_pref(struct mtd_info *mtd,
u16 *p = (u16 *)buf;
unsigned long tim, limit;
+ led_trigger_event(nand_led_trigger, LED_FULL);
+
/* take care of subpage writes */
if (len % 2 != 0) {
writeb(*buf, info->nand.IO_ADDR_W);
@@ -335,6 +342,8 @@ static void omap_write_buf_pref(struct mtd_info *mtd,
/* disable and stop the PFPW engine */
gpmc_prefetch_reset(info->gpmc_cs);
}
+
+ led_trigger_event(nand_led_trigger, LED_OFF);
}
/*
@@ -366,6 +375,8 @@ static inline int omap_nand_dma_transfer(struct mtd_info *mtd, void *addr,
unsigned n;
int ret;
+ led_trigger_event(nand_led_trigger, LED_FULL);
+
if (addr >= high_memory) {
struct page *p1;
@@ -417,6 +428,8 @@ static inline int omap_nand_dma_transfer(struct mtd_info *mtd, void *addr,
gpmc_prefetch_reset(info->gpmc_cs);
dma_unmap_sg(info->dma->device->dev, &sg, 1, dir);
+
+ led_trigger_event(nand_led_trigger, LED_OFF);
return 0;
out_copy_unmap:
@@ -428,6 +441,9 @@ out_copy:
else
is_write == 0 ? omap_read_buf8(mtd, (u_char *) addr, len)
: omap_write_buf8(mtd, (u_char *) addr, len);
+
+ led_trigger_event(nand_led_trigger, LED_OFF);
+
return 0;
}
@@ -886,6 +902,8 @@ static int omap_wait(struct mtd_info *mtd, struct nand_chip *chip)
else
timeo += (HZ * 20) / 1000;
+ led_trigger_event(nand_led_trigger, LED_FULL);
+
gpmc_nand_write(info->gpmc_cs,
GPMC_NAND_COMMAND, (NAND_CMD_STATUS & 0xFF));
while (time_before(jiffies, timeo)) {
@@ -894,6 +912,7 @@ static int omap_wait(struct mtd_info *mtd, struct nand_chip *chip)
break;
cond_resched();
}
+ led_trigger_event(nand_led_trigger, LED_OFF);
status = gpmc_nand_read(info->gpmc_cs, GPMC_NAND_DATA);
return status;
@@ -909,6 +928,8 @@ static int omap_dev_ready(struct mtd_info *mtd)
struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
mtd);
+ led_trigger_event(nand_led_trigger, LED_FULL);
+
val = gpmc_read_status(GPMC_GET_IRQ_STATUS);
if ((val & 0x100) == 0x100) {
/* Clear IRQ Interrupt */
@@ -923,6 +944,8 @@ static int omap_dev_ready(struct mtd_info *mtd)
val = gpmc_read_status(GPMC_GET_IRQ_STATUS);
}
}
+
+ led_trigger_event(nand_led_trigger, LED_OFF);
return 1;
}
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 57977c6..321b7ef 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -23,6 +23,7 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/flashchip.h>
#include <linux/mtd/bbm.h>
+#include <linux/leds.h>
struct mtd_info;
struct nand_flash_dev;
@@ -48,6 +49,9 @@ extern int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
/* unlocks specified locked blocks */
extern int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
+/* LED trigger for NAND drivers not using nand_wait_ready. */
+extern DEFINE_LED_TRIGGER_GLOBAL(nand_led_trigger);
+
/* The maximum number of NAND chips in an array */
#define NAND_MAX_CHIPS 8
--
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