linux-kernel - [PATCH 3/3] ARM: dts: exynos4412-trats2: Switch max77686 regulators to GPIO control

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-id: <1421311295-18960-4-git-send-email-k.kozlowski@samsung.com>
Date:	Thu, 15 Jan 2015 09:41:35 +0100
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Kukjin Kim <kgene@...nel.org>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Subject: [PATCH 3/3] ARM: dts: exynos4412-trats2: Switch max77686 regulators to
 GPIO control

Remove fixed regulators (duplicating what max77686 provides) and
add GPIO enable control to max77686 regulators.

This gives the system full control over those regulators. Previously
the state of such regulators was a mixture of what max77686 driver set
over I2C and what regulator-fixed set through GPIO.

Removal of 'regulator-always-on' from CAM_ISP_CORE_1.2V (buck9) allows
disabling it when it is not used. Previously this regulator was always
enabled because its enable state is a OR of:
 - ENB9 GPIO (turned always on by regulator-fixed),
 - BUCK9EN field in BUCK9CTRL register (off by max77686 through I2C).

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
---
 arch/arm/boot/dts/exynos4412-trats2.dts | 25 +++++--------------------
 1 file changed, 5 insertions(+), 20 deletions(-)

diff --git a/arch/arm/boot/dts/exynos4412-trats2.dts b/arch/arm/boot/dts/exynos4412-trats2.dts
index ef05139506e6..8611c07c2e41 100644
--- a/arch/arm/boot/dts/exynos4412-trats2.dts
+++ b/arch/arm/boot/dts/exynos4412-trats2.dts
@@ -58,15 +58,6 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		vemmc_reg: regulator-0 {
-			compatible = "regulator-fixed";
-			regulator-name = "VMEM_VDD_2.8V";
-			regulator-min-microvolt = <2800000>;
-			regulator-max-microvolt = <2800000>;
-			gpio = <&gpk0 2 0>;
-			enable-active-high;
-		};
-
 		cam_io_reg: voltage-regulator-1 {
 			compatible = "regulator-fixed";
 			regulator-name = "CAM_SENSOR_A";
@@ -94,16 +85,6 @@
 			enable-active-high;
 		};
 
-		cam_isp_core_reg: voltage-regulator-4 {
-			compatible = "regulator-fixed";
-			regulator-name = "CAM_ISP_CORE_1.2V_EN";
-			regulator-min-microvolt = <1200000>;
-			regulator-max-microvolt = <1200000>;
-			gpio = <&gpm0 3 0>;
-			enable-active-high;
-			regulator-always-on;
-		};
-
 		ps_als_reg: voltage-regulator-5 {
 			compatible = "regulator-fixed";
 			regulator-name = "LED_A_3.0V";
@@ -405,6 +386,7 @@
 					regulator-name = "VTF_2.8V";
 					regulator-min-microvolt = <2800000>;
 					regulator-max-microvolt = <2800000>;
+					maxim,ena-gpios = <&gpy2 0 GPIO_ACTIVE_HIGH>;
 				};
 
 				ldo22_reg: ldo22 {
@@ -412,6 +394,7 @@
 					regulator-name = "VMEM_VDD_2.8V";
 					regulator-min-microvolt = <2800000>;
 					regulator-max-microvolt = <2800000>;
+					maxim,ena-gpios = <&gpk0 2 GPIO_ACTIVE_HIGH>;
 				};
 
 				ldo23_reg: ldo23 {
@@ -518,6 +501,7 @@
 					regulator-name = "VMEM_VDDF_3.0V";
 					regulator-min-microvolt = <2850000>;
 					regulator-max-microvolt = <2850000>;
+					maxim,ena-gpios = <&gpk0 2 GPIO_ACTIVE_HIGH>;
 				};
 
 				buck9_reg: buck9 {
@@ -525,6 +509,7 @@
 					regulator-name = "CAM_ISP_CORE_1.2V";
 					regulator-min-microvolt = <1000000>;
 					regulator-max-microvolt = <1200000>;
+					maxim,ena-gpios = <&gpm0 3 GPIO_ACTIVE_HIGH>;
 				};
 			};
 		};
@@ -587,7 +572,7 @@
 		broken-cd;
 		non-removable;
 		card-detect-delay = <200>;
-		vmmc-supply = <&vemmc_reg>;
+		vmmc-supply = <&ldo22_reg>;
 		clock-frequency = <400000000>;
 		samsung,dw-mshc-ciu-div = <0>;
 		samsung,dw-mshc-sdr-timing = <2 3>;
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/