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| author |   Frederic Barrat <fbarrat@linux.vnet.ibm.com> | 2016-03-21 14:32:48 -0500 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2016-04-22 21:45:44 +1000 |
| commit | e009a7e858fed215cb4eed5174a31cadd42d8797 (patch) | |
| tree | 374b3df8a670dfbc72c4eb960f6b488a916958ea /drivers/misc/cxl/sysfs.c | |
| parent | tool/perf: Add sample_reg_mask to include all perf_regs (diff) | |
| download | linux-dev-e009a7e858fed215cb4eed5174a31cadd42d8797.tar.xz linux-dev-e009a7e858fed215cb4eed5174a31cadd42d8797.zip | |
cxl: Allow initialization on timebase sync failures
Failure to synchronize the PSL timebase currently prevents the
initialization of the cxl card, thus rendering the card useless. This
is too extreme for a feature which is rarely used, if at all. No
hardware AFUs or software is currently using PSL timebase.
This patch still tries to synchronize the PSL timebase when the card
is initialized, but ignores the error if it can't. Instead, it reports
a status via /sys.
Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc/cxl/sysfs.c')
| -rw-r--r-- | drivers/misc/cxl/sysfs.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/misc/cxl/sysfs.c b/drivers/misc/cxl/sysfs.c index 25913c08794c..b043c20f158f 100644 --- a/drivers/misc/cxl/sysfs.c +++ b/drivers/misc/cxl/sysfs.c @@ -57,6 +57,15 @@ static ssize_t image_loaded_show(struct device *device, return scnprintf(buf, PAGE_SIZE, "factory\n"); } +static ssize_t psl_timebase_synced_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct cxl *adapter = to_cxl_adapter(device); + + return scnprintf(buf, PAGE_SIZE, "%i\n", adapter->psl_timebase_synced); +} + static ssize_t reset_adapter_store(struct device *device, struct device_attribute *attr, const char *buf, size_t count) @@ -142,6 +151,7 @@ static struct device_attribute adapter_attrs[] = { __ATTR_RO(psl_revision), __ATTR_RO(base_image), __ATTR_RO(image_loaded), + __ATTR_RO(psl_timebase_synced), __ATTR_RW(load_image_on_perst), __ATTR_RW(perst_reloads_same_image), __ATTR(reset, S_IWUSR, NULL, reset_adapter_store), |