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ARM: rockchip: rk3036 add basic pm support

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黄涛
2014-07-16 15:01:10 +08:00
parent c1446874c8
commit 2a6ef7e0ac
1 changed files with 82 additions and 0 deletions
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82
arch/arm/mach-rockchip/rk3036.c
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@@ -23,6 +23,7 @@
#include <linux/kernel.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/wakeup_reason.h>
#include <linux/rockchip/common.h>
#include <linux/rockchip/cpu.h>
#include <linux/rockchip/cru.h>
@@ -173,8 +174,89 @@ static void __init rk3036_dt_init_timer(void)
clocksource_of_init();
}
#ifdef CONFIG_PM
static inline void rk3036_uart_printch(char byte)
{
write_uart:
writel_relaxed(byte, RK_DEBUG_UART_VIRT);
dsb();
/* loop check LSR[6], Transmitter Empty bit */
while (!(readl_relaxed(RK_DEBUG_UART_VIRT + 0x14) & 0x40))
barrier();
if (byte == '\n') {
byte = '\r';
goto write_uart;
}
}
static void rk3036_ddr_printch(char byte)
{
rk3036_uart_printch(byte);
rk_last_log_text(&byte, 1);
if (byte == '\n') {
byte = '\r';
rk_last_log_text(&byte, 1);
}
}
#define GPIO_INTEN 0x30
#define GPIO_INT_STATUS 0x40
#define GIC_DIST_PENDING_SET 0x200
static void rk3036_pm_dump_irq(void)
{
u32 irq_gpio =
(readl_relaxed(RK_GIC_VIRT + GIC_DIST_PENDING_SET + 8) >> 4) & 7;
u32 irq[4];
int i;
for (i = 0; i < ARRAY_SIZE(irq); i++) {
irq[i] = readl_relaxed(RK_GIC_VIRT + GIC_DIST_PENDING_SET +
(1 + i) * 4);
if (irq[i])
log_wakeup_reason(32 * (i + 1) + fls(irq[i]) - 1);
}
pr_info("wakeup irq: %08x %08x %08x %08x\n",
irq[0], irq[1], irq[2], irq[3]);
for (i = 0; i <= 2; i++) {
if (irq_gpio & (1 << i))
pr_info("wakeup gpio%d: %08x\n", i,
readl_relaxed(RK_GPIO_VIRT(i) +
GPIO_INT_STATUS));
}
}
#define DUMP_GPIO_INTEN(ID) \
do { \
u32 en = readl_relaxed(RK_GPIO_VIRT(ID) + GPIO_INTEN); \
if (en) { \
pr_info("GPIO%d_INTEN: %08x\n", ID, en); \
} \
} while (0)
static void rk3036_pm_dump_inten(void)
{
DUMP_GPIO_INTEN(0);
DUMP_GPIO_INTEN(1);
DUMP_GPIO_INTEN(2);
}
static void __init rk3036_suspend_init(void)
{
rkpm_set_ops_prepare_finish(rk3036_pm_dump_inten, rk3036_pm_dump_irq);
rkpm_set_ops_printch(rk3036_ddr_printch);
rockchip_suspend_init();
}
#endif
static void __init rk3036_init_late(void)
{
#ifdef CONFIG_PM
rk3036_suspend_init();
#endif
}
static void __init rk3036_reserve(void)