diff options
| author | Anson Huang <Anson.Huang@nxp.com> | 2016-01-25 22:16:48 +0800 |
|---|---|---|
| committer | Anson Huang <Anson.Huang@nxp.com> | 2016-01-28 18:54:27 +0800 |
| commit | 69d5543e8dbdd2c4480ae0b2cb4d84deb13ddc94 (patch) | |
| tree | 1fc7288f7ea4babd18c9cccce32709d0adb858d3 /arch | |
| parent | 79e27ef0d94b6ce3adf7d51009f4e3cef25d4a7c (diff) | |
MLK-12262-1 ARM: imx: enable ddr auto self-refresh for i.MX7D
Enable DDR auto self-refresh for i.MX7D, when doing DDR
frequency scale or suspend/resume, DDR self-refresh will
be disabled, this is incorrect for saving power, enable it
for all these scenarios.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-imx/ddr3_freq_imx7d.S | 10 | ||||
| -rw-r--r-- | arch/arm/mach-imx/lpddr3_freq_imx.S | 5 | ||||
| -rw-r--r-- | arch/arm/mach-imx/suspend-imx7.S | 5 |
3 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/ddr3_freq_imx7d.S b/arch/arm/mach-imx/ddr3_freq_imx7d.S index 01ab9b002ddf..6b706f4b46eb 100644 --- a/arch/arm/mach-imx/ddr3_freq_imx7d.S +++ b/arch/arm/mach-imx/ddr3_freq_imx7d.S @@ -228,6 +228,11 @@ ldr r7, =0x0 str r7, [r4, #DDRC_DBG1] + /* enable auto self-refresh */ + ldr r7, [r4, #DDRC_PWRCTL] + orr r7, r7, #(1 << 0) + str r7, [r4, #DDRC_PWRCTL] + .endm .macro switch_to_533m @@ -421,6 +426,11 @@ ldr r7, =0x0 str r7, [r4, #DDRC_DBG1] + /* enable auto self-refresh */ + ldr r7, [r4, #DDRC_PWRCTL] + orr r7, r7, #(1 << 0) + str r7, [r4, #DDRC_PWRCTL] + .endm ENTRY(imx7d_ddr3_freq_change) diff --git a/arch/arm/mach-imx/lpddr3_freq_imx.S b/arch/arm/mach-imx/lpddr3_freq_imx.S index 515e96112ef7..b122f797f2e8 100644 --- a/arch/arm/mach-imx/lpddr3_freq_imx.S +++ b/arch/arm/mach-imx/lpddr3_freq_imx.S @@ -117,6 +117,11 @@ ldr r7, =0x1 str r7, [r4, #DDRC_PCTRL_0] + /* enable auto self-refresh */ + ldr r7, [r4, #DDRC_PWRCTL] + orr r7, r7, #(1 << 0) + str r7, [r4, #DDRC_PWRCTL] + .endm .macro switch_to_below_100m diff --git a/arch/arm/mach-imx/suspend-imx7.S b/arch/arm/mach-imx/suspend-imx7.S index 074efdc6f49e..f4a48024ea98 100644 --- a/arch/arm/mach-imx/suspend-imx7.S +++ b/arch/arm/mach-imx/suspend-imx7.S @@ -487,6 +487,11 @@ ldr r7, =0x1 str r7, [r3, #DDRC_PCTRL_0] + /* enable auto self-refresh */ + ldr r7, [r3, #DDRC_PWRCTL] + orr r7, r7, #(1 << 0) + str r7, [r3, #DDRC_PWRCTL] + .endm ENTRY(imx7_suspend) |