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Diffstat (limited to 'arch/arm/mach-vexpress/dcscb.c')
-rw-r--r--arch/arm/mach-vexpress/dcscb.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/arm/mach-vexpress/dcscb.c b/arch/arm/mach-vexpress/dcscb.c
index 65dee7818082..44aa7b040e82 100644
--- a/arch/arm/mach-vexpress/dcscb.c
+++ b/arch/arm/mach-vexpress/dcscb.c
@@ -45,10 +45,12 @@ static arch_spinlock_t dcscb_lock = __ARCH_SPIN_LOCK_UNLOCKED;
static void __iomem *dcscb_base;
static int dcscb_use_count[4][2];
+static int dcscb_allcpus_mask[2];
static int dcscb_power_up(unsigned int cpu, unsigned int cluster)
{
unsigned int rst_hold, cpumask = (1 << cpu);
+ unsigned int all_mask = dcscb_allcpus_mask[cluster];
pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster);
if (cpu >= 4 || cluster >= 2)
@@ -67,7 +69,7 @@ static int dcscb_power_up(unsigned int cpu, unsigned int cluster)
if (rst_hold & (1 << 8)) {
/* remove cluster reset and add individual CPU's reset */
rst_hold &= ~(1 << 8);
- rst_hold |= 0xf;
+ rst_hold |= all_mask;
}
rst_hold &= ~(cpumask | (cpumask << 4));
writel_relaxed(rst_hold, dcscb_base + RST_HOLD0 + cluster * 4);
@@ -91,13 +93,14 @@ static int dcscb_power_up(unsigned int cpu, unsigned int cluster)
static void dcscb_power_down(void)
{
- unsigned int mpidr, cpu, cluster, rst_hold, cpumask;
+ unsigned int mpidr, cpu, cluster, rst_hold, cpumask, all_mask;
bool last_man = false, skip_wfi = false;
mpidr = read_cpuid_mpidr();
cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0);
cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1);
cpumask = (1 << cpu);
+ all_mask = dcscb_allcpus_mask[cluster];
pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster);
BUG_ON(cpu >= 4 || cluster >= 2);
@@ -107,7 +110,7 @@ static void dcscb_power_down(void)
if (dcscb_use_count[cpu][cluster] == 0) {
rst_hold = readl_relaxed(dcscb_base + RST_HOLD0 + cluster * 4);
rst_hold |= cpumask;
- if (((rst_hold | (rst_hold >> 4)) & 0xf) == 0xf) {
+ if (((rst_hold | (rst_hold >> 4)) & all_mask) == all_mask) {
rst_hold |= (1 << 8);
last_man = true;
}
@@ -177,6 +180,7 @@ static void __init dcscb_usage_count_init(void)
static int __init dcscb_init(void)
{
struct device_node *node;
+ unsigned int cfg;
int ret;
node = of_find_compatible_node(NULL, NULL, "arm,rtsm,dcscb");
@@ -185,7 +189,9 @@ static int __init dcscb_init(void)
dcscb_base = of_iomap(node, 0);
if (!dcscb_base)
return -EADDRNOTAVAIL;
-
+ cfg = readl_relaxed(dcscb_base + DCS_CFG_R);
+ dcscb_allcpus_mask[0] = (1 << (((cfg >> 16) >> (0 << 2)) & 0xf)) - 1;
+ dcscb_allcpus_mask[1] = (1 << (((cfg >> 16) >> (1 << 2)) & 0xf)) - 1;
dcscb_usage_count_init();
ret = mcpm_platform_register(&dcscb_power_ops);