From 6edd8ee60ac9b974bd6ec3b1bcb2aab02762fa8c Mon Sep 17 00:00:00 2001 From: Haavard Skinnemoen Date: Thu, 24 Jul 2008 14:18:57 +0200 Subject: mmc: Export internal host state through debugfs When CONFIG_DEBUG_FS is set, create a few files under /sys/kernel/debug containing information about an mmc host's internal state. Currently, just a single file is created, "ios", which contains information about the current operating parameters for the bus (clock speed, bus width, etc.) Host drivers can add additional files and directories under the host's root directory by passing the debugfs_root field in struct mmc_host as the 'parent' parameter to debugfs_create_*. Signed-off-by: Haavard Skinnemoen Signed-off-by: Pierre Ossman --- drivers/mmc/core/host.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/mmc/core/host.c') diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 1d795c5379b5..6da80fd4d974 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -127,6 +127,10 @@ int mmc_add_host(struct mmc_host *host) if (err) return err; +#ifdef CONFIG_DEBUG_FS + mmc_add_host_debugfs(host); +#endif + mmc_start_host(host); return 0; @@ -146,6 +150,10 @@ void mmc_remove_host(struct mmc_host *host) { mmc_stop_host(host); +#ifdef CONFIG_DEBUG_FS + mmc_remove_host_debugfs(host); +#endif + device_del(&host->class_dev); led_trigger_unregister_simple(host->led); -- cgit v1.2.2