lkml.org 
[lkml]   [2022]   [May]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH V6 4/5] mmc: debugfs: Add debug fs error state entry for mmc driver
Date
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 <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>
---
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..3c7908d 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("err_state", 0600, root, host,
+ &mmc_err_state);
debugfs_create_file("err_stats", 0600, root, host,
&mmc_err_stats_fops);

--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
\
 
 \ /
  Last update: 2022-05-18 09:03    [W:0.122 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site