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| author |   Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-07-24 14:18:58 +0200 |
|---|---|---|
| committer |   Pierre Ossman <drzeus@drzeus.cx> | 2008-07-27 01:26:17 +0200 |
| commit | f4b7f927b531ca350cfc4ca1bdc3377dac7f9a32 (patch) | |
| tree | 9ad0b50fba46d24deb361a37a28141b12830b443 /drivers/mmc/core/bus.c | |
| parent | mmc: Export internal host state through debugfs (diff) | |
| download | linux-dev-f4b7f927b531ca350cfc4ca1bdc3377dac7f9a32.tar.xz linux-dev-f4b7f927b531ca350cfc4ca1bdc3377dac7f9a32.zip | |
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.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index fd95b18e988b..0d9b2d6f9ebf 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", |