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Merge series "regulator: mt6397: Implement of_map_mode regulator_desc function" from Anand K Mistry <amistry@google.com>: 

This patchset adds support for being able to change regulator modes for
the mt6397 regulator. This is needed to allow the voltage scaling
support in the MT8173 SoC to be used on the elm (Acer Chromebook R13)
and hana (several Lenovo Chromebooks) devices.

Without a of_map_mode implementation, the regulator-allowed-modes
devicetree field is skipped, and attempting to change the regulator mode
results in an error:
[    1.439165] vpca15: mode operation not allowed

Changes in v2:
- Introduce constants in dt-bindings
- Improve conditional readability

Anand K Mistry (4):
  regulator: mt6397: Move buck modes into header file
  dt-bindings: regulator: mt6397: Document valid modes
  regulator: mt6397: Implement of_map_mode
  arm64: dts: mediatek: Update allowed mt6397 regulator modes for elm
    boards

 .../bindings/regulator/mt6397-regulator.txt     |  3 +++
 arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi    |  4 +++-
 drivers/regulator/mt6397-regulator.c            | 17 ++++++++++++++---
 .../regulator/mediatek,mt6397-regulator.h       | 15 +++++++++++++++
 4 files changed, 35 insertions(+), 4 deletions(-)
 create mode 100644 include/dt-bindings/regulator/mediatek,mt6397-regulator.h

--
2.27.0.212.ge8ba1cc988-goog

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This commit is contained in:
Mark Brown 2020-07-02 16:45:49 +01:00
parent c9b5e85aeb 347f12d573
commit 8cc31dc941
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GPG Key ID: 24D68B725D5487D0
3 changed files with 32 additions and 3 deletions
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3
Documentation/devicetree/bindings/regulator/mt6397-regulator.txt
View File

@ -16,6 +16,9 @@ LDO:
ldo_vemc3v3, ldo_vgp1, ldo_vgp2, ldo_vgp3, ldo_vgp4, ldo_vgp5, ldo_vgp6,
ldo_vibr
BUCK regulators can set regulator-initial-mode and regulator-allowed-modes to
values specified in dt-bindings/regulator/mediatek,mt6397-regulator.h
Example:
pmic {
compatible = "mediatek,mt6397";

17
drivers/regulator/mt6397-regulator.c
View File

@ -13,9 +13,7 @@
#include <linux/regulator/machine.h>
#include <linux/regulator/mt6397-regulator.h>
#include <linux/regulator/of_regulator.h>
#define MT6397_BUCK_MODE_AUTO 0
#define MT6397_BUCK_MODE_FORCE_PWM 1
#include <dt-bindings/regulator/mediatek,mt6397-regulator.h>
/*
* MT6397 regulators' information
@ -55,6 +53,7 @@ struct mt6397_regulator_info {
.vsel_mask = vosel_mask, \
.enable_reg = enreg, \
.enable_mask = BIT(0), \
.of_map_mode = mt6397_map_mode, \
}, \
.qi = BIT(13), \
.vselon_reg = voselon, \
@ -146,6 +145,18 @@ static const unsigned int ldo_volt_table7[] = {
1300000, 1500000, 1800000, 2000000, 2500000, 2800000, 3000000, 3300000,
};
static unsigned int mt6397_map_mode(unsigned int mode)
{
switch (mode) {
case MT6397_BUCK_MODE_AUTO:
return REGULATOR_MODE_NORMAL;
case MT6397_BUCK_MODE_FORCE_PWM:
return REGULATOR_MODE_FAST;
default:
return REGULATOR_MODE_INVALID;
}
}
static int mt6397_regulator_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{

15
include/dt-bindings/regulator/mediatek,mt6397-regulator.h Normal file
View File

@ -0,0 +1,15 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _DT_BINDINGS_REGULATOR_MEDIATEK_MT6397_H_
#define _DT_BINDINGS_REGULATOR_MEDIATEK_MT6397_H_
/*
* Buck mode constants which may be used in devicetree properties (eg.
* regulator-initial-mode, regulator-allowed-modes).
* See the manufacturer's datasheet for more information on these modes.
*/
#define MT6397_BUCK_MODE_AUTO 0
#define MT6397_BUCK_MODE_FORCE_PWM 1
#endif