89 lines
2.2 KiB
Diff
89 lines
2.2 KiB
Diff
|
From f48753a73242adbc22435f27bd3a899bb61af297 Mon Sep 17 00:00:00 2001
|
||
|
|
From: =?UTF-8?q?Ond=C5=99ej=20Jirman?= <megi@xff.cz>
|
||
|
|
Date: Wed, 23 Oct 2019 05:06:29 +0200
|
||
|
|
Subject: [PATCH 024/469] ARM: sunxi: Add experimental suspend to memory
|
||
|
|
implementation for A83T
|
||
|
|
|
||
|
|
This just ends with WFI, but all secondary CPUs will be shut down.
|
||
|
|
|
||
|
|
Signed-off-by: Ondrej Jirman <megi@xff.cz>
|
||
|
|
---
|
||
|
|
arch/arm/mach-sunxi/sunxi.c | 46 +++++++++++++++++++++++++++++++++++++
|
||
|
|
1 file changed, 46 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/arch/arm/mach-sunxi/sunxi.c b/arch/arm/mach-sunxi/sunxi.c
|
||
|
|
index e1b7945aac99..2d6b7b4528e9 100644
|
||
|
|
--- a/arch/arm/mach-sunxi/sunxi.c
|
||
|
|
+++ b/arch/arm/mach-sunxi/sunxi.c
|
||
|
|
@@ -12,10 +12,13 @@
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/of_clk.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
+#include <linux/of_platform.h>
|
||
|
|
#include <linux/reset/sunxi.h>
|
||
|
|
+#include <linux/suspend.h>
|
||
|
|
|
||
|
|
#include <asm/mach/arch.h>
|
||
|
|
#include <asm/secure_cntvoff.h>
|
||
|
|
+#include <asm/suspend.h>
|
||
|
|
|
||
|
|
static const char * const sunxi_board_dt_compat[] = {
|
||
|
|
"allwinner,sun4i-a10",
|
||
|
|
@@ -86,10 +89,53 @@ static const char * const sun8i_a83t_cntvoff_board_dt_compat[] = {
|
||
|
|
NULL,
|
||
|
|
};
|
||
|
|
|
||
|
|
+#ifdef CONFIG_PM_SLEEP
|
||
|
|
+static int sun8i_a83t_pm_valid(suspend_state_t state)
|
||
|
|
+{
|
||
|
|
+ return state == PM_SUSPEND_MEM;
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+static int sun8i_a83t_suspend_finish(unsigned long val)
|
||
|
|
+{
|
||
|
|
+ // don't do much
|
||
|
|
+ cpu_do_idle();
|
||
|
|
+ return 0;
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+static int sun8i_a83t_pm_enter(suspend_state_t state)
|
||
|
|
+{
|
||
|
|
+ switch (state) {
|
||
|
|
+ case PM_SUSPEND_MEM:
|
||
|
|
+ cpu_suspend(0, sun8i_a83t_suspend_finish);
|
||
|
|
+ break;
|
||
|
|
+ default:
|
||
|
|
+ return -EINVAL;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ return 0;
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+static const struct platform_suspend_ops sun8i_a83t_pm_ops = {
|
||
|
|
+ .enter = sun8i_a83t_pm_enter,
|
||
|
|
+ .valid = sun8i_a83t_pm_valid,
|
||
|
|
+};
|
||
|
|
+#define SUN8I_A83T_PM_OPS &sun8i_a83t_pm_ops
|
||
|
|
+#else
|
||
|
|
+#define SUN8I_A83T_PM_OPS NULL
|
||
|
|
+#endif
|
||
|
|
+
|
||
|
|
+static void __init sun8i_a83t_init_machine(void)
|
||
|
|
+{
|
||
|
|
+ suspend_set_ops(SUN8I_A83T_PM_OPS);
|
||
|
|
+
|
||
|
|
+ of_platform_default_populate(NULL, NULL, NULL);
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
DT_MACHINE_START(SUN8I_A83T_CNTVOFF_DT, "Allwinner A83t board")
|
||
|
|
.init_early = sun8i_a83t_cntvoff_init,
|
||
|
|
.init_time = sun6i_timer_init,
|
||
|
|
.dt_compat = sun8i_a83t_cntvoff_board_dt_compat,
|
||
|
|
+ .init_machine = sun8i_a83t_init_machine,
|
||
|
|
MACHINE_END
|
||
|
|
|
||
|
|
static const char * const sun9i_board_dt_compat[] = {
|
||
|
|
--
|
||
|
|
2.34.1
|
||
|
|
|