[PATCH 2/3] ARM: imx: add cpu idle support for i.MX6SLL
From: Anson Huang <hidden>
Date: 2018-05-30 07:16:33
Also in:
lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
i.MX6SLL supports cpu idle with ARM power gated, it can reuse i.MX6SX's cpu idle driver to support below 3 states of cpu idle: state0: WFI; state1: WAIT mode with ARM power on; state2: WAIT mode with ARM power off. L2_PGE in GPC_CNTR needs to be cleared to support state2 cpu idle. Signed-off-by: Anson Huang <redacted> --- arch/arm/mach-imx/cpuidle-imx6sx.c | 1 + arch/arm/mach-imx/mach-imx6sl.c | 5 ++++- 2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/cpuidle-imx6sx.c b/arch/arm/mach-imx/cpuidle-imx6sx.c
index d0f14b7..243a108 100644
--- a/arch/arm/mach-imx/cpuidle-imx6sx.c
+++ b/arch/arm/mach-imx/cpuidle-imx6sx.c@@ -103,6 +103,7 @@ int __init imx6sx_cpuidle_init(void) { imx6_set_int_mem_clk_lpm(true); imx6_enable_rbc(false); + imx_gpc_set_l2_mem_power_in_lpm(false); /* * set ARM power up/down timing to the fastest, * sw2iso and sw can be set to one 32K cycle = 31us
diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c
index c7a1ef1..183540e 100644
--- a/arch/arm/mach-imx/mach-imx6sl.c
+++ b/arch/arm/mach-imx/mach-imx6sl.c@@ -42,7 +42,10 @@ static void __init imx6sl_init_late(void) if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ)) platform_device_register_simple("imx6q-cpufreq", -1, NULL, 0); - imx6sl_cpuidle_init(); + if (cpu_is_imx6sl()) + imx6sl_cpuidle_init(); + else + imx6sx_cpuidle_init(); } static void __init imx6sl_init_machine(void)
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2.7.4