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Date: Sun, 3 Jun 2018 10:33:45 +0800 From: Anson Huang <Anson.Huang@....com> To: shawnguo@...nel.org, kernel@...gutronix.de, fabio.estevam@....com, linux@...linux.org.uk Cc: Linux-imx@....com, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH V2 2/3] ARM: imx: add cpu idle support for i.MX6SLL 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 <Anson.Huang@....com> --- changes since V1: Fix build error when cpuidle-imx6sx.c is NOT included in Makefile by different SoC configuration. arch/arm/mach-imx/Makefile | 4 ++-- arch/arm/mach-imx/cpuidle-imx6sx.c | 1 + arch/arm/mach-imx/mach-imx6sl.c | 5 ++++- 3 files changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index 2327e3e..127fdf3 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -25,8 +25,8 @@ obj-$(CONFIG_MXC_DEBUG_BOARD) += 3ds_debugboard.o ifeq ($(CONFIG_CPU_IDLE),y) obj-$(CONFIG_SOC_IMX5) += cpuidle-imx5.o obj-$(CONFIG_SOC_IMX6Q) += cpuidle-imx6q.o -obj-$(CONFIG_SOC_IMX6SL) += cpuidle-imx6sl.o -obj-$(CONFIG_SOC_IMX6SLL) += cpuidle-imx6sl.o +obj-$(CONFIG_SOC_IMX6SL) += cpuidle-imx6sl.o cpuidle-imx6sx.o +obj-$(CONFIG_SOC_IMX6SLL) += cpuidle-imx6sl.o cpuidle-imx6sx.o obj-$(CONFIG_SOC_IMX6SX) += cpuidle-imx6sx.o obj-$(CONFIG_SOC_IMX6UL) += cpuidle-imx6sx.o endif 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) -- 2.7.4
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