[PATCH V4 4/6] ARM: imx: add suspend in ocram support on i.mx6dl
From: Anson Huang <hidden>
Date: 2014-01-13 11:53:49
Also in:
linux-arm-kernel
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
i.MX6DL's suspend in ocram function is derived from i.MX6Q, the only difference is the offset of DDR IO pins. It can lower the DDR IO power from ~26mA@1.5V to ~15mA@1.5V, measured on i.MX6Q/DL SabreSD board, R25. Signed-off-by: Anson Huang <redacted> --- arch/arm/mach-imx/pm-imx6q.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/arch/arm/mach-imx/pm-imx6q.c b/arch/arm/mach-imx/pm-imx6q.c
index 42ac301..826bf8a 100644
--- a/arch/arm/mach-imx/pm-imx6q.c
+++ b/arch/arm/mach-imx/pm-imx6q.c@@ -100,6 +100,18 @@ static const u32 imx6q_mmdc_io_dsm_offset[] __initconst = { 0x74c /* GPR_ADDS */ }; +static const u32 imx6dl_mmdc_io_dsm_offset[] __initconst = { + 0x470, 0x474, 0x478, 0x47c, /* DQM0 ~ DQM3 */ + 0x480, 0x484, 0x488, 0x48c, /* DQM4 ~ DQM7 */ + 0x464, 0x490, 0x4ac, 0x4b0, /* CAS, RAS, SDCLK_0, SDCLK_1 */ + 0x4bc, 0x4c0, 0x4c4, 0x4c8, /* DRAM_SDQS0 ~ DRAM_SDQS3 */ + 0x4cc, 0x4d0, 0x4d4, 0x4d8, /* DRAM_SDQS4 ~ DRAM_SDQS7 */ + 0x764, 0x770, 0x778, 0x77c, /* GPR_B0DS ~ GPR_B3DS */ + 0x780, 0x784, 0x78c, 0x748, /* GPR_B4DS ~ GPR_B7DS */ + 0x4b4, 0x4b8, 0x750, 0x760, /* SODT0, SODT1, DDRMODE_CTL, DDRMODE */ + 0x74c /* GPR_ADDS */ +}; + /* * This structure is for passing necessary data for low level ocram * suspend code(arch/arm/mach-imx/suspend-imx6.S), if this struct
@@ -413,6 +425,10 @@ static int __init imx6q_ocram_suspend_init(void) pm_info->cpu_type = MXC_CPU_IMX6Q; pm_info->mmdc_io_num = ARRAY_SIZE(imx6q_mmdc_io_dsm_offset); mmdc_offset_array = imx6q_mmdc_io_dsm_offset; + } else if (cpu_is_imx6dl()) { + pm_info->cpu_type = MXC_CPU_IMX6DL; + pm_info->mmdc_io_num = ARRAY_SIZE(imx6dl_mmdc_io_dsm_offset); + mmdc_offset_array = imx6dl_mmdc_io_dsm_offset; } if (!mmdc_offset_array) {
--
1.7.9.5
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