Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
arch/powerpc/include/asm/opal.h | 23 +++++++++++++++++++++++
arch/powerpc/platforms/powernv/opal-wrappers.S | 4 ++++
2 files changed, 27 insertions(+)
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index 029fe85..c701e2b 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -124,6 +124,10 @@ extern int opal_enter_rtas(struct rtas_args *args,
#define OPAL_PCI_POLL 62
#define OPAL_PCI_MSI_EOI 63
#define OPAL_PCI_GET_PHB_DIAG_DATA2 64
+#define OPAL_XSCOM_READ 65
+#define OPAL_XSCOM_WRITE 66
+#define OPAL_LPC_READ 67
+#define OPAL_LPC_WRITE 68
#ifndef __ASSEMBLY__
@@ -337,6 +341,17 @@ enum OpalEpowStatus {
OPAL_EPOW_OVER_INTERNAL_TEMP = 3
};
+/*
+ * Address cycle types for LPC accesses. These also correspond
+ * to the content of the first cell of the "reg" property for
+ * device nodes on the LPC bus
+ */
+enum OpalLPCAddressType {
+ OPAL_LPC_MEM = 0,
+ OPAL_LPC_IO = 1,
+ OPAL_LPC_FW = 2,
+};
+
struct opal_machine_check_event {
enum OpalMCE_Version version:8; /* 0x00 */
uint8_t in_use; /* 0x01 */
@@ -632,6 +647,14 @@ int64_t opal_pci_next_error(uint64_t phb_id, uint64_t
*first_frozen_pe,
uint16_t *pci_error_type, uint16_t *severity);
int64_t opal_pci_poll(uint64_t phb_id);
+int64_t opal_xscom_read(uint32_t gcid, uint32_t pcb_addr, uint64_t *val);
+int64_t opal_xscom_write(uint32_t gcid, uint32_t pcb_addr, uint64_t val);
+
+int64_t opal_lpc_write(uint32_t chip_id, enum OpalLPCAddressType addr_type,
+ uint32_t addr, uint32_t data, uint32_t sz);
+int64_t opal_lpc_read(uint32_t chip_id, enum OpalLPCAddressType addr_type,
+ uint32_t addr, uint32_t *data, uint32_t sz);
+
/* Internal functions */
extern int early_init_dt_scan_opal(unsigned long node, const char *uname, int
depth, void *data);
diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S
b/arch/powerpc/platforms/powernv/opal-wrappers.S
index e88863f..42c06fb 100644
--- a/arch/powerpc/platforms/powernv/opal-wrappers.S
+++ b/arch/powerpc/platforms/powernv/opal-wrappers.S
@@ -111,3 +111,7 @@ OPAL_CALL(opal_pci_next_error,
OPAL_PCI_NEXT_ERROR);
OPAL_CALL(opal_pci_poll, OPAL_PCI_POLL);
OPAL_CALL(opal_pci_msi_eoi, OPAL_PCI_MSI_EOI);
OPAL_CALL(opal_pci_get_phb_diag_data2, OPAL_PCI_GET_PHB_DIAG_DATA2);
+OPAL_CALL(opal_xscom_read, OPAL_XSCOM_READ);
+OPAL_CALL(opal_xscom_write, OPAL_XSCOM_WRITE);
+OPAL_CALL(opal_lpc_read, OPAL_LPC_READ);
+OPAL_CALL(opal_lpc_write, OPAL_LPC_WRITE);
--
1.8.1.2
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