From c791bbbf812a18a7831619783f12a316beeac558 Mon Sep 17 00:00:00 2001 From: Anson Huang Date: Sun, 3 Jun 2018 10:33:44 +0800 Subject: [PATCH] ARM: imx: add L2 page power control for GPC Some platforms like i.MX6UL/i.MX6SLL have L2 page power control in GPC, it needs to be disabled if ARM is power gated and L2 is NOT flushed, add GPC interface to control it. Signed-off-by: Anson Huang Reviewed-by: Fabio Estevam Signed-off-by: Shawn Guo --- arch/arm/mach-imx/common.h | 1 + arch/arm/mach-imx/gpc.c | 14 ++++++++++++++ 2 files changed, 15 insertions(+) diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h index 18aae76fa2da..93225db759f8 100644 --- a/arch/arm/mach-imx/common.h +++ b/arch/arm/mach-imx/common.h @@ -57,6 +57,7 @@ struct device *imx_soc_device_init(void); void imx6_enable_rbc(bool enable); void imx_gpc_check_dt(void); void imx_gpc_set_arm_power_in_lpm(bool power_off); +void imx_gpc_set_l2_mem_power_in_lpm(bool power_off); void imx_gpc_set_arm_power_up_timing(u32 sw2iso, u32 sw); void imx_gpc_set_arm_power_down_timing(u32 sw2iso, u32 sw); void imx25_pm_init(void); diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c index de535cb679b3..e11159d40fb8 100644 --- a/arch/arm/mach-imx/gpc.c +++ b/arch/arm/mach-imx/gpc.c @@ -20,6 +20,7 @@ #include "common.h" #include "hardware.h" +#define GPC_CNTR 0x0 #define GPC_IMR1 0x008 #define GPC_PGC_CPU_PDN 0x2a0 #define GPC_PGC_CPU_PUPSCR 0x2a4 @@ -27,6 +28,8 @@ #define GPC_PGC_SW2ISO_SHIFT 0x8 #define GPC_PGC_SW_SHIFT 0x0 +#define GPC_CNTR_L2_PGE_SHIFT 22 + #define IMR_NUM 4 #define GPC_MAX_IRQS (IMR_NUM * 32) @@ -51,6 +54,17 @@ void imx_gpc_set_arm_power_in_lpm(bool power_off) writel_relaxed(power_off, gpc_base + GPC_PGC_CPU_PDN); } +void imx_gpc_set_l2_mem_power_in_lpm(bool power_off) +{ + u32 val; + + val = readl_relaxed(gpc_base + GPC_CNTR); + val &= ~(1 << GPC_CNTR_L2_PGE_SHIFT); + if (power_off) + val |= 1 << GPC_CNTR_L2_PGE_SHIFT; + writel_relaxed(val, gpc_base + GPC_CNTR); +} + void imx_gpc_pre_suspend(bool arm_power_off) { void __iomem *reg_imr1 = gpc_base + GPC_IMR1;