diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/platform/x86/intel_pmc_ipc.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c index e03fa31446ca..e7edc8c63936 100644 --- a/drivers/platform/x86/intel_pmc_ipc.c +++ b/drivers/platform/x86/intel_pmc_ipc.c @@ -215,11 +215,11 @@ static inline int is_gcr_valid(u32 offset) } /** - * intel_pmc_gcr_read() - Read PMC GCR register + * intel_pmc_gcr_read() - Read a 32-bit PMC GCR register * @offset: offset of GCR register from GCR address base * @data: data pointer for storing the register output * - * Reads the PMC GCR register of given offset. + * Reads the 32-bit PMC GCR register at given offset. * * Return: negative value on error or 0 on success. */ @@ -244,6 +244,35 @@ int intel_pmc_gcr_read(u32 offset, u32 *data) EXPORT_SYMBOL_GPL(intel_pmc_gcr_read); /** + * intel_pmc_gcr_read64() - Read a 64-bit PMC GCR register + * @offset: offset of GCR register from GCR address base + * @data: data pointer for storing the register output + * + * Reads the 64-bit PMC GCR register at given offset. + * + * Return: negative value on error or 0 on success. + */ +int intel_pmc_gcr_read64(u32 offset, u64 *data) +{ + int ret; + + spin_lock(&ipcdev.gcr_lock); + + ret = is_gcr_valid(offset); + if (ret < 0) { + spin_unlock(&ipcdev.gcr_lock); + return ret; + } + + *data = readq(ipcdev.gcr_mem_base + offset); + + spin_unlock(&ipcdev.gcr_lock); + + return 0; +} +EXPORT_SYMBOL_GPL(intel_pmc_gcr_read64); + +/** * intel_pmc_gcr_write() - Write PMC GCR register * @offset: offset of GCR register from GCR address base * @data: register update value |