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FROMGIT: mmc: debugfs: Add debug fs error state entry for mmc driver

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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.

(cherry picked from commit 6ecf831d2cea999c2cc881b39b147cf8ee9e43ae
 https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git devel)
Bug: 233007144
Link: https://lore.kernel.org/lkml/1652857340-6040-5-git-send-email-quic_c_sbhanu@quicinc.com/

Signed-off-by: Liangliang Lu <quic_luliang@quicinc.com>
Signed-off-by: Sayali Lokhande <quic_sayalil@quicinc.com>
Signed-off-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
Signed-off-by: Shaik Sajida Bhanu <quic_c_sbhanu@quicinc.com>
Change-Id: Ie4cf876dc02fb719d91a7d37c8c5ec3aa2df54ab
This commit is contained in:
Shaik Sajida Bhanu
2022-05-18 12:32:19 +05:30
committed by Carlos Llamas
parent a70d301048
commit 232df716fb
1 changed files with 20 additions and 0 deletions
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20
drivers/mmc/core/debugfs.c
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@@ -223,6 +223,24 @@ 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;
*val = 0;
for (i = 0; i < ARRAY_SIZE(host->err_stats); 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 +307,8 @@ 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("err_state", 0600, root, host,
&mmc_err_state);
debugfs_create_file("err_stats", 0600, root, host,
&mmc_err_stats_fops);