summaryrefslogtreecommitdiff
path: root/include/linux/soc
diff options
context:
space:
mode:
authorRussell King <rmk+kernel@arm.linux.org.uk>2015-07-15 21:59:36 +0300
committerGregory CLEMENT <gregory.clement@free-electrons.com>2015-08-05 19:36:49 +0300
commit44e259ac909f3b41786cf732a44b5cf8444e098a (patch)
tree64b295810cbc09821dc2717be1e0b60855cf3e63 /include/linux/soc
parent482d638f98cc626bf01d4c9f6d6d35fc77d630c8 (diff)
downloadlinux-44e259ac909f3b41786cf732a44b5cf8444e098a.tar.xz
ARM: dove: create a proper PMU driver for power domains, PMU IRQs and resets
The PMU device contains an interrupt controller, power control and resets. The interrupt controller is a little sub-standard in that there is no race free way to clear down pending interrupts, so we try to avoid problems by reducing the window as much as possible, and clearing as infrequently as possible. The interrupt support is implemented using an IRQ domain, and the parent interrupt referenced in the standard DT way. The power domains and reset support is closely related - there is a defined sequence for powering down a domain which is tightly coupled with asserting the reset. Hence, it makes sense to group these two together, and in order to avoid any locking contention disrupting this sequence, we avoid the use of syscon or regmap. This patch adds the core PMU driver: power domains must be defined in the DT file in order to make use of them. The reset controller can be referenced in the standard way for reset controllers. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Diffstat (limited to 'include/linux/soc')
-rw-r--r--include/linux/soc/dove/pmu.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/soc/dove/pmu.h b/include/linux/soc/dove/pmu.h
new file mode 100644
index 000000000000..9c99f84bcc0e
--- /dev/null
+++ b/include/linux/soc/dove/pmu.h
@@ -0,0 +1,6 @@
+#ifndef LINUX_SOC_DOVE_PMU_H
+#define LINUX_SOC_DOVE_PMU_H
+
+int dove_init_pmu(void);
+
+#endif