davinci: DA8XX/OMAP-L1XX: add support for cpuidle driver register

This patch provides a function to help register cpuidle driver
on da8xx/omap-l1xx platforms.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

2 files changed, 32 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index fda83f82a5fe..dd2d32c4ce86 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -19,6 +19,7 @@
 #include <mach/common.h>
 #include <mach/time.h>
 #include <mach/da8xx.h>
+#include <mach/cpuidle.h>
 
 #include "clock.h"
 
@@ -486,3 +487,32 @@ int da8xx_register_rtc(void)
 
 	return platform_device_register(&da8xx_rtc_device);
 }
+
+static struct resource da8xx_cpuidle_resources[] = {
+	{
+		.start		= DA8XX_DDR2_CTL_BASE,
+		.end		= DA8XX_DDR2_CTL_BASE + SZ_32K - 1,
+		.flags		= IORESOURCE_MEM,
+	},
+};
+
+/* DA8XX devices support DDR2 power down */
+static struct davinci_cpuidle_config da8xx_cpuidle_pdata = {
+	.ddr2_pdown	= 1,
+};
+
+
+static struct platform_device da8xx_cpuidle_device = {
+	.name			= "cpuidle-davinci",
+	.num_resources		= ARRAY_SIZE(da8xx_cpuidle_resources),
+	.resource		= da8xx_cpuidle_resources,
+	.dev = {
+		.platform_data	= &da8xx_cpuidle_pdata,
+	},
+};
+
+int __init da8xx_register_cpuidle(void)
+{
+	return platform_device_register(&da8xx_cpuidle_device);
+}
+
diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h
index 174c75817d32..90704910d343 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/arch/arm/mach-davinci/include/mach/da8xx.h
@@ -52,6 +52,7 @@ extern void __iomem *da8xx_syscfg_base;
 #define DA8XX_AEMIF_CS2_BASE	0x60000000
 #define DA8XX_AEMIF_CS3_BASE	0x62000000
 #define DA8XX_AEMIF_CTL_BASE	0x68000000
+#define DA8XX_DDR2_CTL_BASE	0xb0000000
 
 #define PINMUX0			0x00
 #define PINMUX1			0x04
@@ -88,6 +89,7 @@ int da8xx_register_mmcsd0(struct davinci_mmc_config *config);
 void __init da8xx_register_mcasp(int id, struct snd_platform_data *pdata);
 int da8xx_register_rtc(void);
 int da850_register_cpufreq(void);
+int da8xx_register_cpuidle(void);
 
 extern struct platform_device da8xx_serial_device;
 extern struct emac_platform_data da8xx_emac_pdata;