From fadf344e6d69a94efa17619120132516f56b582c Mon Sep 17 00:00:00 2001 From: Shaik Sajida Bhanu Date: Fri, 27 May 2022 23:23:55 +0530 Subject: [PATCH] mmc: debugfs: Add debug fs error state entry for mmc driver Add debug fs entry error state to query eMMC and SD card errors statistics. If any errors occurred in eMMC and SD card driver level then err_state value will be set to 1. Signed-off-by: Liangliang Lu Signed-off-by: Sayali Lokhande Signed-off-by: Bao D. Nguyen Signed-off-by: Shaik Sajida Bhanu Acked-by: Adrian Hunter Link: https://lore.kernel.org/r/1653674036-21829-5-git-send-email-quic_c_sbhanu@quicinc.com Signed-off-by: Ulf Hansson --- drivers/mmc/core/debugfs.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c index 6aa5a60..75e98ec 100644 --- a/drivers/mmc/core/debugfs.c +++ b/drivers/mmc/core/debugfs.c @@ -223,6 +223,27 @@ static int mmc_clock_opt_set(void *data, u64 val) DEFINE_DEBUGFS_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set, "%llu\n"); +static int mmc_err_state_get(void *data, u64 *val) +{ + struct mmc_host *host = data; + int i; + + if (!host) + return -EINVAL; + + *val = 0; + for (i = 0; i < MMC_ERR_MAX; i++) { + if (host->err_stats[i]) { + *val = 1; + break; + } + } + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(mmc_err_state, mmc_err_state_get, NULL, "%llu\n"); + static int mmc_err_stats_show(struct seq_file *file, void *data) { struct mmc_host *host = (struct mmc_host *)file->private; @@ -289,6 +310,8 @@ void mmc_add_host_debugfs(struct mmc_host *host) debugfs_create_file_unsafe("clock", S_IRUSR | S_IWUSR, root, host, &mmc_clock_fops); + debugfs_create_file_unsafe("err_state", 0600, root, host, + &mmc_err_state); debugfs_create_file("err_stats", 0600, root, host, &mmc_err_stats_fops); -- 2.7.4