From: Adam YH Lee <adam.yh.lee-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> To: linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: ashcharles-EiDWdcs9+yZBDgjK7y7TUQ@public.gmane.org, arun-EiDWdcs9+yZBDgjK7y7TUQ@public.gmane.org, Adam YH Lee <adam.yh.lee-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Subject: [PATCH v2] ARM: dts: configure regulators for Gumstix Pepper Date: Thu, 9 Jul 2015 15:37:57 -0700 [thread overview] Message-ID: <1436481477-18002-1-git-send-email-adam.yh.lee@gmail.com> (raw) 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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> --- arch/arm/boot/dts/am335x-pepper.dts | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm/boot/dts/am335x-pepper.dts b/arch/arm/boot/dts/am335x-pepper.dts index 0d35ab6..661f835 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; }; }; }; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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From: adam.yh.lee@gmail.com (Adam YH Lee) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2] ARM: dts: configure regulators for Gumstix Pepper Date: Thu, 9 Jul 2015 15:37:57 -0700 [thread overview] Message-ID: <1436481477-18002-1-git-send-email-adam.yh.lee@gmail.com> (raw) 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> --- arch/arm/boot/dts/am335x-pepper.dts | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm/boot/dts/am335x-pepper.dts b/arch/arm/boot/dts/am335x-pepper.dts index 0d35ab6..661f835 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 at 0 { /* VDD_1V8 system supply */ + regulator-always-on; }; dcdc2_reg: regulator at 1 { @@ -446,6 +447,7 @@ regulator-min-microvolt = <925000>; regulator-max-microvolt = <1325000>; regulator-boot-on; + regulator-always-on; }; dcdc3_reg: regulator at 2 { @@ -454,25 +456,32 @@ regulator-min-microvolt = <925000>; regulator-max-microvolt = <1150000>; regulator-boot-on; + regulator-always-on; }; ldo1_reg: regulator at 3 { /* VRTC 1.8V always-on supply */ + regulator-name = "vrtc,vdds"; regulator-always-on; }; ldo2_reg: regulator at 4 { /* 3.3V rail */ + regulator-name = "vdd_3v3aux"; + regulator-always-on; }; ldo3_reg: regulator at 5 { /* VDD_3V3A 3.3V rail */ + regulator-name = "vdd_3v3a"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; }; ldo4_reg: regulator at 6 { /* VDD_3V3B 3.3V rail */ + regulator-name = "vdd_3v3b"; + regulator-always-on; }; }; }; -- 2.1.4
next reply other threads:[~2015-07-09 22:37 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-07-09 22:37 Adam YH Lee [this message] 2015-07-09 22:37 ` [PATCH v2] ARM: dts: configure regulators for Gumstix Pepper Adam YH Lee [not found] ` <1436481477-18002-1-git-send-email-adam.yh.lee-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2015-07-14 6:49 ` Tony Lindgren 2015-07-14 6:49 ` Tony Lindgren
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