89 lines
2.2 KiB
Diff
89 lines
2.2 KiB
Diff
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From 59d9726f48d1eda5059cf7c58955a4b4244eb643 Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megous@megous.com>
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Date: Wed, 23 Oct 2019 05:06:29 +0200
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Subject: [PATCH 131/478] ARM: sunxi: Add experimental suspend to memory
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implementation for A83T
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This just ends with WFI, but all secondary CPUs will be shut down.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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arch/arm/mach-sunxi/sunxi.c | 46 +++++++++++++++++++++++++++++++++++++
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1 file changed, 46 insertions(+)
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diff --git a/arch/arm/mach-sunxi/sunxi.c b/arch/arm/mach-sunxi/sunxi.c
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index 19635721013d..fd6432faa103 100644
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--- a/arch/arm/mach-sunxi/sunxi.c
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+++ b/arch/arm/mach-sunxi/sunxi.c
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@@ -14,10 +14,13 @@
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#include <linux/init.h>
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#include <linux/of_clk.h>
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#include <linux/platform_device.h>
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+#include <linux/of_platform.h>
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#include <linux/reset/sunxi.h>
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+#include <linux/suspend.h>
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#include <asm/mach/arch.h>
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#include <asm/secure_cntvoff.h>
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+#include <asm/suspend.h>
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static const char * const sunxi_board_dt_compat[] = {
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"allwinner,sun4i-a10",
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@@ -88,10 +91,53 @@ static const char * const sun8i_a83t_cntvoff_board_dt_compat[] = {
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NULL,
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};
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+#ifdef CONFIG_PM_SLEEP
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+static int sun8i_a83t_pm_valid(suspend_state_t state)
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+{
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+ return state == PM_SUSPEND_MEM;
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+}
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+
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+static int sun8i_a83t_suspend_finish(unsigned long val)
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+{
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+ // don't do much
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+ cpu_do_idle();
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+ return 0;
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+}
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+
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+static int sun8i_a83t_pm_enter(suspend_state_t state)
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+{
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+ switch (state) {
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+ case PM_SUSPEND_MEM:
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+ cpu_suspend(0, sun8i_a83t_suspend_finish);
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+}
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+
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+static const struct platform_suspend_ops sun8i_a83t_pm_ops = {
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+ .enter = sun8i_a83t_pm_enter,
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+ .valid = sun8i_a83t_pm_valid,
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+};
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+#define SUN8I_A83T_PM_OPS &sun8i_a83t_pm_ops
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+#else
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+#define SUN8I_A83T_PM_OPS NULL
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+#endif
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+
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+static void __init sun8i_a83t_init_machine(void)
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+{
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+ suspend_set_ops(SUN8I_A83T_PM_OPS);
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+
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+ of_platform_default_populate(NULL, NULL, NULL);
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+}
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+
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DT_MACHINE_START(SUN8I_A83T_CNTVOFF_DT, "Allwinner A83t board")
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.init_early = sun8i_a83t_cntvoff_init,
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.init_time = sun6i_timer_init,
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.dt_compat = sun8i_a83t_cntvoff_board_dt_compat,
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+ .init_machine = sun8i_a83t_init_machine,
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MACHINE_END
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static const char * const sun9i_board_dt_compat[] = {
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--
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2.35.3
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