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regulator: Add snapshot of MSM GFX LDO driver
This is a snapshot of MSM GFX LDO regulator driver for SDM660 as of msm-4.4 'commit ae5acb1 (Merge "soc: msm-pcm: Add mutex lock to protect prvt data")'. Change-Id: Id13b6b601c91aa6c2c2f0e6d820a244144b60437 Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org> Signed-off-by: Asha Magadi Venkateshamurthy <amagad@codeaurora.org>
This commit is contained in:
Anirudh Ghayal
Asha Magadi Venkateshamurthy
parent
4cc2350d91
commit
4b9943dce4
148
Documentation/devicetree/bindings/regulator/msm_gfx_ldo.txt
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148
Documentation/devicetree/bindings/regulator/msm_gfx_ldo.txt
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@ -0,0 +1,148 @@
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Qualcomm Technologies, Inc. GFX LDO for Graphics
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The GPU core on MSM 8953 can be powered by an internal (on-die)
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MSM LDO or BHS based on its operating corner.
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This document describes the bindings that apply for the GFX LDO regulator.
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- compatible
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Usage: required
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Value type: <string>
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Definition: should be "qcom,msm8953-gfx-ldo" for MSM8953 and
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"qcom,sdm660-gfx-ldo" for SDM660
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- reg
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Usage: required
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Value type: <prop-encoded-array>
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Definition: Addresses and sizes for the memory of the GFX ldo
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- reg-names
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Usage: required
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Value type: <stringlist>
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Definition: Address names. "ldo_addr", "efuse_addr". Must be
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specified in the same order as the corresponding addresses
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are specified in the reg property.
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- regulator-name
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Usage: required
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Value type: <string>
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Definition: A string used to describe the regulator.
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- regulator-min-microvolt
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Usage: required
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Value type: <u32>
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Definition: Minimum corner value which should be 1 to represent the
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lowest supported corner.
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- regulator-max-microvolt
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Usage: required
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Value type: <u32>
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Definition: Maximum corner value which should be equal to qcom,num-corners.
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- qcom,num-corners
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Usage: required
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Value type: <u32>
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Definition: Number of voltage corners present. Many other
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properties are sized based upon this value.
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- qcom,num-ldo-corners
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Usage: required
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Value type: <u32>
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Definition: Number of voltage corners defined for the ldo. It is a
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subset of qcom,num-corners (i.e. 1 to qcom,num-ldo-corners
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are the corners for ldo operation)
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- qcom,init-corner
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Usage: required
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Value type: <u32>
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Definition: The initial-corner at which the GFX rail is powered on.
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- qcom,ldo-enable-corner-map
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Usage: required
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Value type: <prop-encoded-array>
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Definition: Integer values ( / 0) which indicate the GFX corners in which
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ldo is to enabled. The length of this property
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should be equal to qcom,num-corners.
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- qcom,ldo-voltage-ceiling
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Usage: required
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Value type: <prop-encoded-array>
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Definition: Array of ceiling voltages in microvolts for voltage corners
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ordered from lowest voltage corner to highest voltage corner.
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This property must be of length defined by qcom,num-ldo-corners.
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- qcom,ldo-voltage-floor
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Usage: required
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Value type: <prop-encoded-array>
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Definition: Array of floor voltages in microvolts for voltage corners
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ordered from lowest voltage corner to highest voltage corner.
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This property must be of length defined by qcom,num-ldo-corners.
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- vdd-cx-supply
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Usage: optional
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Value type: <phandle>
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Definition: Parent regulator supply to the ldo.
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- qcom,vdd-cx-corner-map
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Usage: required if vdd-cx-supply is specified.
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Value type: <prop-encoded-array>
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Definition: Array of integers which define the mapping of the VDD_CX corner
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to the corresponding GFX voltage corner. The elements in
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the array are ordered from lowest voltage corner to highest
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voltage corner. The length of this property must be equal to
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the value defined by qcom,num-corners.
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- mem-acc-supply
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Usage: optional
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Value type: <phandle>
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Definition: Regulator to vote for the memory accelerator configuration.
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Not Present: memory accelerator configuration not supported.
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- qcom,mem-acc-corner-map:
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Usage: optional
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Value type: <prop-encoded-aray>
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Definition: Array of integer which defines the mapping from mem-acc
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corner value for each gfx corner. The elements in the array
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are ordered from lowest voltage corner to highest voltage corner.
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- qcom,ldo-init-voltage-adjustment
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Usage: optional
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Value type: <prop-encoded-aray>
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Definition: Array of voltages in microvolts which indicate the static
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adjustment to be applied to the open-loop voltages for the
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LDO supported corners. The length of this property must be
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equal to qcom,num-ldo-corners.
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=======
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Example
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=======
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gfx_vreg_corner: ldo@0185f000 {
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compatible = "qcom,msm8953-gfx-ldo";
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reg = <0x0185f000 0x30>, <0xa0000 0x1000>;
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reg-names = "ldo_addr", "efuse_addr";
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regulator-name = "msm_gfx_ldo";
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regulator-min-microvolt = <1>;
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regulator-max-microvolt = <7>;
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qcom,ldo-voltage-ceiling = <500000 700000 900000>;
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qcom,ldo-voltage-floor = <400000 600000 800000>;
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qcom,num-corners = <7>;
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qcom,num-ldo-corners = <3>;
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qcom,ldo-enable-corner-map = <1 1 1 0 0 0 0>;
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qcom,init-corner = <5>;
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vdd-cx-supply = <&pm8953_s2_level>;
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qcom,vdd-cx-corner-map = <RPM_SMD_REGULATOR_LEVEL_LOW_SVS>,
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<RPM_SMD_REGULATOR_LEVEL_LOW_SVS>,
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<RPM_SMD_REGULATOR_LEVEL_LOW_SVS>,
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<RPM_SMD_REGULATOR_LEVEL_SVS>,
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<RPM_SMD_REGULATOR_LEVEL_NOM>,
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<RPM_SMD_REGULATOR_LEVEL_NOM_PLUS>,
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<RPM_SMD_REGULATOR_LEVEL_TURBO>;
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mem-acc-supply = <&gfx_mem_acc>;
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qcom,mem-acc-corner-map = <1 1 2 2 2 2 2>;
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qcom,ldo-init-voltage-adjustment = <10000 20000 30000>;
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};
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@ -1042,6 +1042,16 @@ config REGULATOR_REFGEN
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it used by various PHY blocks found inside of the SoC. It supports
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enable/disable control.
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config REGULATOR_MSM_GFX_LDO
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tristate "MSM GFX LDO Regulator"
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depends on OF
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help
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This driver supports the MSM GFX (Graphics) LDO regulator. The
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GFU core is either powered by an internal MSM LDO or by BHS.
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Typically the lower voltage corners are powered by LDO and
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the higher ones by BHS. This driver allows for configuration of
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the rail between the LDO/BHS as well as the LDO voltage.
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config REGULATOR_RPMH
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tristate "Qualcomm Technologies, Inc. RPMh regulator driver"
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depends on OF
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@ -130,6 +130,7 @@ obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
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obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
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obj-$(CONFIG_REGULATOR_CPR) += cpr-regulator.o
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obj-$(CONFIG_REGULATOR_MEM_ACC) += mem-acc-regulator.o
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obj-$(CONFIG_REGULATOR_MSM_GFX_LDO) += msm_gfx_ldo.o
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obj-$(CONFIG_REGULATOR_REFGEN) += refgen.o
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obj-$(CONFIG_REGULATOR_RPM_SMD) += rpm-smd-regulator.o
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obj-$(CONFIG_REGULATOR_SPM) += spm-regulator.o
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1652
drivers/regulator/msm_gfx_ldo.c
Normal file
1652
drivers/regulator/msm_gfx_ldo.c
Normal file
File diff suppressed because it is too large
Load Diff
32
include/linux/regulator/msm-ldo-regulator.h
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32
include/linux/regulator/msm-ldo-regulator.h
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@ -0,0 +1,32 @@
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/*
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* Copyright (c) 2015-2019, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __MSM_LDO_REGULATOR_H__
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#define __MSM_LDO_REGULATOR_H__
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/**
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* enum msm_ldo_supply_mode - supported operating modes by this regulator type.
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* Use negative logic to ensure BHS mode is treated as the safe default by the
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* the regulator framework. This is necessary since LDO mode can only be enabled
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* when several constraints are satisfied. Consumers of this regulator are
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* expected to request changes in operating modes through the use of
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* regulator_allow_bypass() passing in the desired LDO supply mode.
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* %BHS_MODE: to select BHS as operating mode
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* %LDO_MODE: to select LDO as operating mode
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*/
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enum msm_ldo_supply_mode {
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BHS_MODE = false,
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LDO_MODE = true,
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};
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#endif /* __MSM_LDO_REGULATOR_H__ */
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