Commit fadf344e authored by Shaik Sajida Bhanu's avatar Shaik Sajida Bhanu Committed by Ulf Hansson
Browse files

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: default avatarLiangliang Lu <quic_luliang@quicinc.com>
Signed-off-by: default avatarSayali Lokhande <quic_sayalil@quicinc.com>
Signed-off-by: default avatarBao D. Nguyen <quic_nguyenb@quicinc.com>
Signed-off-by: default avatarShaik Sajida Bhanu <quic_c_sbhanu@quicinc.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1653674036-21829-5-git-send-email-quic_c_sbhanu@quicinc.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 7ae20fa3

drivers/mmc/core/debugfs.c

+23 −0
Original line number Diff line number Diff line
@@ -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);