diff options
Diffstat (limited to 'arch/arm/mach-imx/clock-imx6q.c')
| -rw-r--r-- | arch/arm/mach-imx/clock-imx6q.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/clock-imx6q.c b/arch/arm/mach-imx/clock-imx6q.c index 0ac0094472d..3ee5edb497e 100644 --- a/arch/arm/mach-imx/clock-imx6q.c +++ b/arch/arm/mach-imx/clock-imx6q.c @@ -18,6 +18,7 @@ #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_irq.h> +#include <linux/suspend.h> #include <asm/div64.h> #include <asm/mach/map.h> #include <mach/clock.h> @@ -1945,6 +1946,45 @@ static struct clk_lookup lookups[] = { _REGISTER_CLOCK(NULL, "gpt_clk", gpt_clk), }; +static u32 ccr, clpcr, ccgr1, ccgr6; +#define BP_CCR_RBC_EN 27 +void imx6q_ccm_pre_suspend(suspend_state_t state) +{ + ccr = readl_relaxed(CCR); + if (state == PM_SUSPEND_MEM) { + writel_relaxed(ccr | (1 << BP_CCR_RBC_EN), CCR); + } + clpcr = readl_relaxed(CLPCR); + + /* for GPU */ + ccgr1 = readl_relaxed(CCGR1); + ccgr6 = readl_relaxed(CCGR6); +} + +void imx6q_ccm_gpu_pre_suspend(void) +{ + /* disable clocks */ + writel_relaxed(ccgr1 & 0xf0ffffff, CCGR1); + writel_relaxed(ccgr6 & 0x00003fff, CCGR6); +} + +void imx6q_ccm_gpu_post_resume(void) +{ + /* enable clocks */ + writel_relaxed(ccgr1 | 0x0f000000, CCGR1); + writel_relaxed(ccgr6 | 0x0000c000, CCGR6); +} + +void imx6q_ccm_post_resume(void) +{ + writel_relaxed(ccr, CCR); + writel_relaxed(clpcr, CLPCR); + + /* for GPU */ + writel_relaxed(ccgr1, CCGR1); + writel_relaxed(ccgr6, CCGR6); +} + int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode) { u32 val = readl_relaxed(CLPCR); @@ -1972,9 +2012,18 @@ int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode) val |= BM_CLPCR_SBYOS; val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS; break; + case ARM_POWER_OFF: + val |= 0x2 << BP_CLPCR_LPM; + val |= 0x3 << BP_CLPCR_STBY_COUNT; + val |= BM_CLPCR_VSTBY; + val |= BM_CLPCR_SBYOS; + val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS; + val |= BM_CLPCR_WB_PER_AT_LPM; + break; default: return -EINVAL; } + writel_relaxed(val, CLPCR); return 0; @@ -2016,7 +2065,7 @@ int __init mx6q_clocks_init(void) } /* only keep necessary clocks on */ - writel_relaxed(0x3 << CG0 | 0x3 << CG1 | 0x3 << CG2, CCGR0); + writel_relaxed(0x3 << CG0 | 0x3 << CG1 | 0x3 << CG2, CCGR0); writel_relaxed(0x3 << CG8 | 0x3 << CG9 | 0x3 << CG10, CCGR2); writel_relaxed(0x3 << CG10 | 0x3 << CG12 | 0x1 << CG14, CCGR3); writel_relaxed(0x3 << CG4 | 0x3 << CG6 | 0x3 << CG7, CCGR4); |