From dbf5789ea66058be431569cc16d88448baafe644 Mon Sep 17 00:00:00 2001
From: Jon Medhurst <tixy@linaro.org>
Date: Tue, 11 Feb 2014 09:46:14 +0000
Subject: [PATCH] juno: Implement SCPI Set CSS Power State command
Signed-off-by: Jon Medhurst <tixy@linaro.org>
---
plat/juno/scpi.c | 11 +++++++++++
plat/juno/scpi.h | 9 +++++++++
2 files changed, 20 insertions(+)
diff --git a/plat/juno/scpi.c b/plat/juno/scpi.c
index 44498e5d3..6b7d9a7da 100644
--- a/plat/juno/scpi.c
+++ b/plat/juno/scpi.c
@@ -112,3 +112,14 @@ int scpi_wait_ready(void)
return response == SCP_OK ? 0 : -1;
}
+
+void scpi_set_css_power_state(unsigned mpidr, scpi_power_state cpu_state,
+ scpi_power_state cluster_state, scpi_power_state css_state)
+{
+ uint32_t state = mpidr & 0x0f; /* CPU ID */
+ state |= (mpidr & 0xf00) >> 4; /* Cluster ID */
+ state |= cpu_state << 8;
+ state |= cluster_state << 12;
+ state |= css_state << 16;
+ scpi_secure_send32(SCPI_CMD_SET_CSS_POWER_STATE, state);
+}
diff --git a/plat/juno/scpi.h b/plat/juno/scpi.h
index 63c6c4a99..9d77a9269 100644
--- a/plat/juno/scpi.h
+++ b/plat/juno/scpi.h
@@ -58,8 +58,17 @@ typedef uint32_t spci_status;
typedef enum {
SCPI_CMD_SCP_READY = 0x01,
+ SCPI_CMD_SET_CSS_POWER_STATE = 0x04,
} spci_command;
+typedef enum {
+ scpi_power_on = 0,
+ scpi_power_retention = 1,
+ scpi_power_off = 3,
+} scpi_power_state;
+
extern int scpi_wait_ready(void);
+extern void scpi_set_css_power_state(unsigned mpidr, scpi_power_state cpu_state,
+ scpi_power_state cluster_state, scpi_power_state css_state);
#endif /* __SCPI_H__ */
--
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