platform/x86: intel_pmc_ipc: Add read64 API

Add intel_pmc_gcr_read64() API for reading from 64-bit GCR registers.
This API will be called from intel_telemetry. Update description of
intel_pmc_gcr_read().

Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/x86/include/asm/intel_pmc_ipc.h b/arch/x86/include/asm/intel_pmc_ipc.h
index 528ed4be4393..9e7adcdbe031 100644
--- a/arch/x86/include/asm/intel_pmc_ipc.h
+++ b/arch/x86/include/asm/intel_pmc_ipc.h
@@ -38,6 +38,7 @@ int intel_pmc_ipc_command(u32 cmd, u32 sub, u8 *in, u32 inlen,
 		u32 *out, u32 outlen);
 int intel_pmc_s0ix_counter_read(u64 *data);
 int intel_pmc_gcr_read(u32 offset, u32 *data);
+int intel_pmc_gcr_read64(u32 offset, u64 *data);
 int intel_pmc_gcr_write(u32 offset, u32 data);
 int intel_pmc_gcr_update(u32 offset, u32 mask, u32 val);
 
@@ -70,6 +71,11 @@ static inline int intel_pmc_gcr_read(u32 offset, u32 *data)
 	return -EINVAL;
 }
 
+static inline int intel_pmc_gcr_read64(u32 offset, u64 *data)
+{
+	return -EINVAL;
+}
+
 static inline int intel_pmc_gcr_write(u32 offset, u32 data)
 {
 	return -EINVAL;