diff options
| author | Liangliang Lu <luliang@codeaurora.org> | 2016-12-03 10:34:26 +0800 |
|---|---|---|
| committer | Sayali Lokhande <sayalil@codeaurora.org> | 2017-03-06 09:08:10 +0530 |
| commit | 8ae07180f05a62867746eb27aa808913c23e7f73 (patch) | |
| tree | 5c81225c2bd7090b85fdae10cbc30ed28abdbb20 /drivers | |
| parent | 0022c06fc83f147d3563f7f65b13ff7576ca4048 (diff) | |
mmc: mmc-debugfs: add error state
This change adds support to allow user space query if low level eMMC
driver has encountered any error or not, this state can be read/cleared
via debugfs.
CRs-Fixed: 1056483
Change-Id: Idc4ea375e9f308446dec04d443d062fe502658bd
Signed-off-by: Liangliang Lu <luliang@codeaurora.org>
Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/core/debugfs.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c index a0d31ded04db..594fba08e623 100644 --- a/drivers/mmc/core/debugfs.c +++ b/drivers/mmc/core/debugfs.c @@ -348,6 +348,33 @@ static int mmc_force_err_set(void *data, u64 val) DEFINE_SIMPLE_ATTRIBUTE(mmc_force_err_fops, NULL, mmc_force_err_set, "%llu\n"); +static int mmc_err_state_get(void *data, u64 *val) +{ + struct mmc_host *host = data; + + if (!host) + return -EINVAL; + + *val = host->err_occurred ? 1 : 0; + + return 0; +} + +static int mmc_err_state_clear(void *data, u64 val) +{ + struct mmc_host *host = data; + + if (!host) + return -EINVAL; + + host->err_occurred = false; + + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(mmc_err_state, mmc_err_state_get, + mmc_err_state_clear, "%llu\n"); + void mmc_add_host_debugfs(struct mmc_host *host) { struct dentry *root; @@ -393,6 +420,10 @@ void mmc_add_host_debugfs(struct mmc_host *host) root, host, &mmc_ring_buffer_fops)) goto err_node; #endif + if (!debugfs_create_file("err_state", S_IRUSR | S_IWUSR, root, host, + &mmc_err_state)) + goto err_node; + #ifdef CONFIG_MMC_CLKGATE if (!debugfs_create_u32("clk_delay", (S_IRUSR | S_IWUSR), root, &host->clk_delay)) |