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authorAndreas Färber <afaerber@suse.de>2017-06-05 21:04:21 +0200
committerAndreas Färber <afaerber@suse.de>2017-06-23 17:43:27 +0200
commit6932ec60cc0a71689150b16b71427cfdc6575602 (patch)
tree27942772c2ef4d35444d6c4ef7c48e36663d9855 /drivers/soc/actions
parentaa9f800ded78d530bb07104a4745e95af723abf6 (diff)
soc: actions: owl-sps: Factor out owl_sps_set_pg() for power-gating
Allow the SMP code to reuse PM domain code for CPU2/CPU3 wakeup. Signed-off-by: Andreas Färber <afaerber@suse.de>
Diffstat (limited to 'drivers/soc/actions')
-rw-r--r--drivers/soc/actions/Kconfig4
-rw-r--r--drivers/soc/actions/Makefile1
-rw-r--r--drivers/soc/actions/owl-sps-helper.c51
-rw-r--r--drivers/soc/actions/owl-sps.c34
4 files changed, 59 insertions, 31 deletions
diff --git a/drivers/soc/actions/Kconfig b/drivers/soc/actions/Kconfig
index bdf827d5ce78..9d68b5a771c3 100644
--- a/drivers/soc/actions/Kconfig
+++ b/drivers/soc/actions/Kconfig
@@ -1,8 +1,12 @@
if ARCH_ACTIONS || COMPILE_TEST
+config OWL_PM_DOMAINS_HELPER
+ bool
+
config OWL_PM_DOMAINS
bool "Actions Semi SPS power domains"
depends on PM
+ select OWL_PM_DOMAINS_HELPER
select PM_GENERIC_DOMAINS
help
Say 'y' here to enable support for Smart Power System (SPS)
diff --git a/drivers/soc/actions/Makefile b/drivers/soc/actions/Makefile
index 720c34ed16e4..1e101b06bab1 100644
--- a/drivers/soc/actions/Makefile
+++ b/drivers/soc/actions/Makefile
@@ -1 +1,2 @@
+obj-$(CONFIG_OWL_PM_DOMAINS_HELPER) += owl-sps-helper.o
obj-$(CONFIG_OWL_PM_DOMAINS) += owl-sps.o
diff --git a/drivers/soc/actions/owl-sps-helper.c b/drivers/soc/actions/owl-sps-helper.c
new file mode 100644
index 000000000000..9d7a2c2b44ec
--- /dev/null
+++ b/drivers/soc/actions/owl-sps-helper.c
@@ -0,0 +1,51 @@
+/*
+ * Actions Semi Owl Smart Power System (SPS) shared helpers
+ *
+ * Copyright 2012 Actions Semi Inc.
+ * Author: Actions Semi, Inc.
+ *
+ * Copyright (c) 2017 Andreas Färber
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+
+#define OWL_SPS_PG_CTL 0x0
+
+int owl_sps_set_pg(void __iomem *base, u32 pwr_mask, u32 ack_mask, bool enable)
+{
+ u32 val;
+ bool ack;
+ int timeout;
+
+ val = readl(base + OWL_SPS_PG_CTL);
+ ack = val & ack_mask;
+ if (ack == enable)
+ return 0;
+
+ if (enable)
+ val |= pwr_mask;
+ else
+ val &= ~pwr_mask;
+
+ writel(val, base + OWL_SPS_PG_CTL);
+
+ for (timeout = 5000; timeout > 0; timeout -= 50) {
+ val = readl(base + OWL_SPS_PG_CTL);
+ if ((val & ack_mask) == (enable ? ack_mask : 0))
+ break;
+ udelay(50);
+ }
+ if (timeout <= 0)
+ return -ETIMEDOUT;
+
+ udelay(10);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(owl_sps_set_pg);
diff --git a/drivers/soc/actions/owl-sps.c b/drivers/soc/actions/owl-sps.c
index 8abb72f01929..875225bfa21c 100644
--- a/drivers/soc/actions/owl-sps.c
+++ b/drivers/soc/actions/owl-sps.c
@@ -12,15 +12,12 @@
* option) any later version.
*/
-#include <linux/delay.h>
-#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/pm_domain.h>
+#include <linux/soc/actions/owl-sps.h>
#include <dt-bindings/power/owl-s500-powergate.h>
-#define OWL_SPS_PG_CTL 0x0
-
struct owl_sps_domain_info {
const char *name;
int pwr_bit;
@@ -51,37 +48,12 @@ struct owl_sps_domain {
static int owl_sps_set_power(struct owl_sps_domain *pd, bool enable)
{
- u32 val, pwr_mask, ack_mask;
- int timeout;
- bool ack;
+ u32 pwr_mask, ack_mask;
ack_mask = BIT(pd->info->ack_bit);
pwr_mask = BIT(pd->info->pwr_bit);
- val = readl(pd->sps->base + OWL_SPS_PG_CTL);
- ack = val & ack_mask;
-
- if (ack == enable)
- return 0;
-
- if (enable)
- val |= pwr_mask;
- else
- val &= ~pwr_mask;
-
- writel(val, pd->sps->base + OWL_SPS_PG_CTL);
- for (timeout = 5000; timeout > 0; timeout -= 50) {
- val = readl(pd->sps->base + OWL_SPS_PG_CTL);
- if ((val & ack_mask) == (enable ? ack_mask : 0))
- break;
- udelay(50);
- }
- if (timeout <= 0)
- return -ETIMEDOUT;
-
- udelay(10);
-
- return 0;
+ return owl_sps_set_pg(pd->sps->base, pwr_mask, ack_mask, enable);
}
static int owl_sps_power_on(struct generic_pm_domain *domain)