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davinci: da850/omap-l138: add support for SoC suspend

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This patch adds support for registering for suspend-to-RAM
functionality on da850/omap-l138 SoCs.

da850 supports wakeup based on external event and RTC
alarm.

Currently only RTC alarm based wakeup is supported.
Support for wakeup based on external event will be
added as later improvements.

For scheduling an alarm event on RTC some useful code
is present in Documentation/rtc.txt

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Sekhar Nori 2009-12-17 18:29:32 +05:30 committed by Kevin Hilman
parent efc1bb8a6f
commit 044ca01521
3 changed files with 44 additions and 0 deletions
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39
arch/arm/mach-davinci/da850.c
View file

@ -26,6 +26,7 @@
#include <mach/time.h>
#include <mach/da8xx.h>
#include <mach/cpufreq.h>
#include <mach/pm.h>
#include "clock.h"
#include "mux.h"
@ -536,6 +537,7 @@ static const struct mux_config da850_pins[] = {
MUX_CFG(DA850, GPIO2_15, 5, 0, 15, 8, false)
MUX_CFG(DA850, GPIO4_0, 10, 28, 15, 8, false)
MUX_CFG(DA850, GPIO4_1, 10, 24, 15, 8, false)
MUX_CFG(DA850, RTC_ALARM, 0, 28, 15, 2, false)
#endif
};
@ -1029,6 +1031,43 @@ static int da850_round_armrate(struct clk *clk, unsigned long rate)
}
#endif
int da850_register_pm(struct platform_device *pdev)
{
int ret;
struct davinci_pm_config *pdata = pdev->dev.platform_data;
ret = davinci_cfg_reg(DA850_RTC_ALARM);
if (ret)
return ret;
pdata->ddr2_ctlr_base = da8xx_get_mem_ctlr();
pdata->deepsleep_reg = DA8XX_SYSCFG1_VIRT(DA8XX_DEEPSLEEP_REG);
pdata->ddrpsc_num = DA8XX_LPSC1_EMIF3C;
pdata->cpupll_reg_base = ioremap(DA8XX_PLL0_BASE, SZ_4K);
if (!pdata->cpupll_reg_base)
return -ENOMEM;
pdata->ddrpll_reg_base = ioremap(DA8XX_PLL1_BASE, SZ_4K);
if (!pdata->ddrpll_reg_base) {
ret = -ENOMEM;
goto no_ddrpll_mem;
}
pdata->ddrpsc_reg_base = ioremap(DA8XX_PSC1_BASE, SZ_4K);
if (!pdata->ddrpsc_reg_base) {
ret = -ENOMEM;
goto no_ddrpsc_mem;
}
return platform_device_register(pdev);
no_ddrpsc_mem:
iounmap(pdata->ddrpll_reg_base);
no_ddrpll_mem:
iounmap(pdata->cpupll_reg_base);
return ret;
}
static struct davinci_soc_info davinci_soc_info_da850 = {
.io_desc = da850_io_desc,

4
arch/arm/mach-davinci/include/mach/da8xx.h
View file

@ -20,6 +20,7 @@
#include <mach/asp.h>
#include <mach/mmc.h>
#include <mach/usb.h>
#include <mach/pm.h>
extern void __iomem *da8xx_syscfg0_base;
extern void __iomem *da8xx_syscfg1_base;
@ -44,6 +45,7 @@ extern void __iomem *da8xx_syscfg1_base;
#define DA8XX_SYSCFG1_BASE (IO_PHYS + 0x22C000)
#define DA8XX_SYSCFG1_VIRT(x) (da8xx_syscfg1_base + (x))
#define DA8XX_DEEPSLEEP_REG 0x8
#define DA8XX_PSC0_BASE 0x01c10000
#define DA8XX_PLL0_BASE 0x01c11000
@ -52,6 +54,7 @@ extern void __iomem *da8xx_syscfg1_base;
#define DA8XX_GPIO_BASE 0x01e26000
#define DA8XX_PSC1_BASE 0x01e27000
#define DA8XX_LCD_CNTRL_BASE 0x01e13000
#define DA8XX_PLL1_BASE 0x01e1a000
#define DA8XX_MMCSD0_BASE 0x01c40000
#define DA8XX_AEMIF_CS2_BASE 0x60000000
#define DA8XX_AEMIF_CS3_BASE 0x62000000
@ -96,6 +99,7 @@ int da8xx_register_rtc(void);
int da850_register_cpufreq(void);
int da8xx_register_cpuidle(void);
void __iomem * __init da8xx_get_mem_ctlr(void);
int da850_register_pm(struct platform_device *pdev);
extern struct platform_device da8xx_serial_device;
extern struct emac_platform_data da8xx_emac_pdata;

1
arch/arm/mach-davinci/include/mach/mux.h
View file

@ -899,6 +899,7 @@ enum davinci_da850_index {
DA850_GPIO2_15,
DA850_GPIO4_0,
DA850_GPIO4_1,
DA850_RTC_ALARM,
};
#ifdef CONFIG_DAVINCI_MUX