From: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Anton Blanchard <anton@samba.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>,
"Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] powerpc/cpuidle: Fix parsing of idle state flags from device-tree
Date: Sun, 03 Aug 2014 13:23:08 +0530 [thread overview]
Message-ID: <20140803075119.10152.52685.stgit@drishya> (raw)
Flags from device-tree need to be parsed with accessors for
interpreting correct value in little-endian.
Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
---
drivers/cpuidle/cpuidle-powernv.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c
index 74f5788..a64be57 100644
--- a/drivers/cpuidle/cpuidle-powernv.c
+++ b/drivers/cpuidle/cpuidle-powernv.c
@@ -160,10 +160,10 @@ static int powernv_cpuidle_driver_init(void)
static int powernv_add_idle_states(void)
{
struct device_node *power_mgt;
- struct property *prop;
int nr_idle_states = 1; /* Snooze */
int dt_idle_states;
- u32 *flags;
+ const __be32 *idle_state_flags;
+ u32 len_flags, flags;
int i;
/* Currently we have snooze statically defined */
@@ -174,18 +174,18 @@ static int powernv_add_idle_states(void)
return nr_idle_states;
}
- prop = of_find_property(power_mgt, "ibm,cpu-idle-state-flags", NULL);
- if (!prop) {
+ idle_state_flags = of_get_property(power_mgt, "ibm,cpu-idle-state-flags", &len_flags);
+ if (!idle_state_flags) {
pr_warn("DT-PowerMgmt: missing ibm,cpu-idle-state-flags\n");
return nr_idle_states;
}
- dt_idle_states = prop->length / sizeof(u32);
- flags = (u32 *) prop->value;
+ dt_idle_states = len_flags / sizeof(u32);
for (i = 0; i < dt_idle_states; i++) {
- if (flags[i] & IDLE_USE_INST_NAP) {
+ flags = be32_to_cpu(idle_state_flags[i]);
+ if (flags & IDLE_USE_INST_NAP) {
/* Add NAP state */
strcpy(powernv_states[nr_idle_states].name, "Nap");
strcpy(powernv_states[nr_idle_states].desc, "Nap");
@@ -196,7 +196,7 @@ static int powernv_add_idle_states(void)
nr_idle_states++;
}
- if (flags[i] & IDLE_USE_INST_SLEEP) {
+ if (flags & IDLE_USE_INST_SLEEP) {
/* Add FASTSLEEP state */
strcpy(powernv_states[nr_idle_states].name, "FastSleep");
strcpy(powernv_states[nr_idle_states].desc, "FastSleep");
next reply other threads:[~2014-08-03 7:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-03 7:53 Vaidyanathan Srinivasan [this message]
2014-08-03 13:01 ` [PATCH] powerpc/cpuidle: Fix parsing of idle state flags from device-tree Preeti U Murthy
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