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| author | Adam YH Lee <adam.yh.lee@gmail.com> | 2015-07-09 15:37:57 -0700 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2015-07-14 00:00:46 -0700 |
| commit | 5aed4ee7cc1f214173b3a029452fe4be7bf89541 (patch) | |
| tree | ed2a2a975e320ed1b5af4481bb5a0776c13a4a06 /arch/arm | |
| parent | 3c20b827b1803335aacdab63fb5ed0fd2f4c04ca (diff) | |
| download | linux-5aed4ee7cc1f214173b3a029452fe4be7bf89541.tar.gz | |
ARM: dts: configure regulators for Gumstix Pepper
Boot process is halting in midway because some of the necessary voltage regulators are deemed unused and subsequently powered off, leading to a completely unresponsive system. Most of the device nodes had correct voltage regulator attachments. Yet these nodes had to set stricter enforcement on them through 'regulator-boot-on' and 'regulator-always-on' to function correctly. The consumers of the regulators this commit affect are the followings: DCDC1: vdd_1v8 system supply, USB-PHY, and ADC DCDC2: Core domain DCDC3: MPU core domain LDO1: RTC LDO2: 3v3 IO domain LDO3: USB-PHY; not a boot-time requirement LDO4: LCD [16:23] All but LDO3 need to be always-on for the system to be functional. Additionally regulator-name properties have been added for the kernel to display the name from the schematic. This will improve diagnostics. Signed-off-by: Adam YH Lee <adam.yh.lee@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/boot/dts/am335x-pepper.dts | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/am335x-pepper.dts b/arch/arm/boot/dts/am335x-pepper.dts index 0d35ab64641c..661f835addba 100644 --- a/arch/arm/boot/dts/am335x-pepper.dts +++ b/arch/arm/boot/dts/am335x-pepper.dts @@ -438,6 +438,7 @@ regulators { dcdc1_reg: regulator@0 { /* VDD_1V8 system supply */ + regulator-always-on; }; dcdc2_reg: regulator@1 { @@ -446,6 +447,7 @@ regulator-min-microvolt = <925000>; regulator-max-microvolt = <1325000>; regulator-boot-on; + regulator-always-on; }; dcdc3_reg: regulator@2 { @@ -454,25 +456,32 @@ regulator-min-microvolt = <925000>; regulator-max-microvolt = <1150000>; regulator-boot-on; + regulator-always-on; }; ldo1_reg: regulator@3 { /* VRTC 1.8V always-on supply */ + regulator-name = "vrtc,vdds"; regulator-always-on; }; ldo2_reg: regulator@4 { /* 3.3V rail */ + regulator-name = "vdd_3v3aux"; + regulator-always-on; }; ldo3_reg: regulator@5 { /* VDD_3V3A 3.3V rail */ + regulator-name = "vdd_3v3a"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; }; ldo4_reg: regulator@6 { /* VDD_3V3B 3.3V rail */ + regulator-name = "vdd_3v3b"; + regulator-always-on; }; }; }; |