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[PATCH v5 7/7] ARM: imx: Add imx6q cpuidle driver

 

 

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rob.lee at linaro

May 21, 2012, 3:50 PM

Post #1 of 1 (62 views)
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[PATCH v5 7/7] ARM: imx: Add imx6q cpuidle driver

Add basic imx6q cpuidle driver. For now, only basic WFI state is
supported. Deeper idle states will be added in the future.

Signed-off-by: Robert Lee <rob.lee [at] linaro>
---
arch/arm/mach-imx/mach-imx6q.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index da6c1d9..4fc1fe7 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -10,7 +10,9 @@
* http://www.gnu.org/copyleft/gpl.html
*/

+#include <linux/cpuidle.h>
#include <linux/delay.h>
+#include <linux/export.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/irq.h>
@@ -21,6 +23,7 @@
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/micrel_phy.h>
+#include <asm/cpuidle.h>
#include <asm/smp_twd.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/hardware/gic.h>
@@ -28,8 +31,10 @@
#include <asm/mach/time.h>
#include <asm/system_misc.h>
#include <mach/common.h>
+#include <mach/cpuidle.h>
#include <mach/hardware.h>

+
void imx6q_restart(char mode, const char *cmd)
{
struct device_node *np;
@@ -86,6 +91,19 @@ static void __init imx6q_init_machine(void)
imx6q_pm_init();
}

+static struct cpuidle_driver imx6q_cpuidle_driver = {
+ .name = "imx6q_cpuidle",
+ .owner = THIS_MODULE,
+ .en_core_tk_irqen = 1,
+ .states[0] = ARM_CPUIDLE_WFI_STATE,
+ .state_count = 1,
+};
+
+static void __init imx6q_init_late(void)
+{
+ imx_cpuidle_init(&imx6q_cpuidle_driver);
+}
+
static void __init imx6q_map_io(void)
{
imx_lluart_map_io();
@@ -142,6 +160,7 @@ DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)")
.handle_irq = imx6q_handle_irq,
.timer = &imx6q_timer,
.init_machine = imx6q_init_machine,
+ .init_late = imx6q_init_late,
.dt_compat = imx6q_dt_compat,
.restart = imx6q_restart,
MACHINE_END
--
1.7.10

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