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authorHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-07-24 14:18:58 +0200
committerPierre Ossman <drzeus@drzeus.cx>2008-07-27 01:26:17 +0200
commitf4b7f927b531ca350cfc4ca1bdc3377dac7f9a32 (patch)
tree9ad0b50fba46d24deb361a37a28141b12830b443 /drivers/mmc/core/bus.c
parent6edd8ee60ac9b974bd6ec3b1bcb2aab02762fa8c (diff)
mmc: Add per-card debugfs support
For each card successfully added to the bus, create a subdirectory under the host's debugfs root with information about the card. At the moment, only a single file is added to the card directory for all cards: "state". It reflects the "state" field in struct mmc_card, indicating whether the card is present, readonly, etc. For MMC and SD cards (not SDIO), another file is added: "status". Reading this file will ask the card about its current status and return it. This can be useful if the card just refuses to respond to any commands, which might indicate that the card state is not what the MMC core thinks it is (due to a missing stop command, for example.) Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/core/bus.c')
-rw-r--r--drivers/mmc/core/bus.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index fd95b18e988..0d9b2d6f9eb 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -252,6 +252,10 @@ int mmc_add_card(struct mmc_card *card)
if (ret)
return ret;
+#ifdef CONFIG_DEBUG_FS
+ mmc_add_card_debugfs(card);
+#endif
+
mmc_card_set_present(card);
return 0;
@@ -263,6 +267,10 @@ int mmc_add_card(struct mmc_card *card)
*/
void mmc_remove_card(struct mmc_card *card)
{
+#ifdef CONFIG_DEBUG_FS
+ mmc_remove_card_debugfs(card);
+#endif
+
if (mmc_card_present(card)) {
if (mmc_host_is_spi(card->host)) {
printk(KERN_INFO "%s: SPI card removed\n",