Unverified Commit 8b84d712 authored by Alex Elder's avatar Alex Elder Committed by Mark Brown
Browse files

regulator: spacemit: support SpacemiT P1 regulators 



Add support for the regulators found in the SpacemiT P1 PMIC.  This
PMIC provides 6 buck converters and 12 LDO regulators.

The PMIC is implemented as a multi-function device.  These regulators
are probed based on this driver being named in a MFD cell in the simple
MFD I2C driver.

Signed-off-by: default avatarAlex Elder <elder@riscstar.com>
Link: https://patch.msgid.link/20250825172057.163883-4-elder@riscstar.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 41b5c85b

drivers/regulator/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -1443,6 +1443,19 @@ config REGULATOR_SLG51000 
	  The SLG51000 is seven compact and customizable low dropout

	  regulators.



config REGULATOR_SPACEMIT_P1

	tristate "SpacemiT P1 regulators"

	depends on ARCH_SPACEMIT || COMPILE_TEST

	depends on I2C

	select MFD_SPACEMIT_P1

	default ARCH_SPACEMIT

	help

	  Enable support for regulators implemented by the SpacemiT P1

	  power controller.  The P1 implements 6 high-efficiency buck

	  converters and 12 programmable LDO regulators.  To compile this

	  driver as a module, choose M here.  The module will be called

	  "spacemit-pmic".



config REGULATOR_STM32_BOOSTER

	tristate "STMicroelectronics STM32 BOOSTER"

	depends on ARCH_STM32 || COMPILE_TEST

drivers/regulator/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -167,6 +167,7 @@ obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o 
obj-$(CONFIG_REGULATOR_SC2731) += sc2731-regulator.o

obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o

obj-$(CONFIG_REGULATOR_SLG51000) += slg51000-regulator.o

obj-$(CONFIG_REGULATOR_SPACEMIT_P1) += spacemit-p1.o

obj-$(CONFIG_REGULATOR_STM32_BOOSTER) += stm32-booster.o

obj-$(CONFIG_REGULATOR_STM32_VREFBUF) += stm32-vrefbuf.o

obj-$(CONFIG_REGULATOR_STM32_PWR) += stm32-pwr.o

drivers/regulator/spacemit-p1.c

0 → 100644
+157 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * Driver for regulators found in the SpacemiT P1 PMIC

 *

 * Copyright (C) 2025 by RISCstar Solutions Corporation.  All rights reserved.

 * Derived from code from SpacemiT.

 *	Copyright (c) 2023, SPACEMIT Co., Ltd

 */



#include <linux/array_size.h>

#include <linux/bits.h>

#include <linux/device.h>

#include <linux/linear_range.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/regulator/driver.h>



#define MOD_NAME	"spacemit-p1-regulator"



enum p1_regulator_id {

	P1_BUCK1,

	P1_BUCK2,

	P1_BUCK3,

	P1_BUCK4,

	P1_BUCK5,

	P1_BUCK6,



	P1_ALDO1,

	P1_ALDO2,

	P1_ALDO3,

	P1_ALDO4,



	P1_DLDO1,

	P1_DLDO2,

	P1_DLDO3,

	P1_DLDO4,

	P1_DLDO5,

	P1_DLDO6,

	P1_DLDO7,

};



static const struct regulator_ops p1_regulator_ops = {

	.list_voltage		= regulator_list_voltage_linear_range,

	.get_voltage_sel	= regulator_get_voltage_sel_regmap,

	.set_voltage_sel	= regulator_set_voltage_sel_regmap,

	.set_voltage_time_sel   = regulator_set_voltage_time_sel,

	.enable			= regulator_enable_regmap,

	.disable		= regulator_disable_regmap,

	.is_enabled		= regulator_is_enabled_regmap,

};



/* Selector value 255 can be used to disable the buck converter on sleep */

static const struct linear_range p1_buck_ranges[] = {

	REGULATOR_LINEAR_RANGE(500000, 0, 170, 5000),

	REGULATOR_LINEAR_RANGE(1375000, 171, 254, 25000),

};



/* Selector value 0 can be used for suspend */

static const struct linear_range p1_ldo_ranges[] = {

	REGULATOR_LINEAR_RANGE(500000, 11, 127, 25000),

};



/* These define the voltage selector field for buck and LDO regulators */

#define BUCK_MASK		GENMASK(7, 0)

#define LDO_MASK		GENMASK(6, 0)



#define P1_ID(_TYPE, _n)	P1_ ## _TYPE ## _n

#define P1_ENABLE_REG(_off, _n)	((_off) + 3 * ((_n) - 1))



#define P1_REG_DESC(_TYPE, _type, _n, _s, _off, _mask, _nv, _ranges)	\

	{								\

		.name			= #_type #_n,			\

		.supply_name		= _s,				\

		.of_match		= of_match_ptr(#_type #_n),	\

		.regulators_node	= of_match_ptr("regulators"),	\

		.id			= P1_ID(_TYPE, _n),		\

		.n_voltages		= _nv,				\

		.ops			= &p1_regulator_ops,		\

		.owner			= THIS_MODULE,			\

		.linear_ranges		= _ranges,			\

		.n_linear_ranges	= ARRAY_SIZE(_ranges),		\

		.vsel_reg		= P1_ENABLE_REG(_off, _n) + 1,	\

		.vsel_mask		= _mask,			\

		.enable_reg		= P1_ENABLE_REG(_off, _n),	\

		.enable_mask		= BIT(0),			\

	}



#define P1_BUCK_DESC(_n) \

	P1_REG_DESC(BUCK, buck, _n, "vcc", 0x47, BUCK_MASK, 254, p1_buck_ranges)



#define P1_ALDO_DESC(_n) \

	P1_REG_DESC(ALDO, aldo, _n, "vcc", 0x5b, LDO_MASK, 117, p1_ldo_ranges)



#define P1_DLDO_DESC(_n) \

	P1_REG_DESC(DLDO, dldo, _n, "buck5", 0x67, LDO_MASK, 117, p1_ldo_ranges)



static const struct regulator_desc p1_regulator_desc[] = {

	P1_BUCK_DESC(1),

	P1_BUCK_DESC(2),

	P1_BUCK_DESC(3),

	P1_BUCK_DESC(4),

	P1_BUCK_DESC(5),

	P1_BUCK_DESC(6),



	P1_ALDO_DESC(1),

	P1_ALDO_DESC(2),

	P1_ALDO_DESC(3),

	P1_ALDO_DESC(4),



	P1_DLDO_DESC(1),

	P1_DLDO_DESC(2),

	P1_DLDO_DESC(3),

	P1_DLDO_DESC(4),

	P1_DLDO_DESC(5),

	P1_DLDO_DESC(6),

	P1_DLDO_DESC(7),

};



static int p1_regulator_probe(struct platform_device *pdev)

{

	struct regulator_config config = { };

	struct device *dev = &pdev->dev;

	u32 i;



	/*

	 * The parent device (PMIC) owns the regmap.  Since we don't

	 * provide one in the config structure, that one will be used.

	 */

	config.dev = dev->parent;



	for (i = 0; i < ARRAY_SIZE(p1_regulator_desc); i++) {

		const struct regulator_desc *desc = &p1_regulator_desc[i];

		struct regulator_dev *rdev;



		rdev = devm_regulator_register(dev, desc, &config);

		if (IS_ERR(rdev))

			return dev_err_probe(dev, PTR_ERR(rdev),

					     "error registering regulator %s\n",

					     desc->name);

	}



	return 0;

}



static struct platform_driver p1_regulator_driver = {

	.probe = p1_regulator_probe,

	.driver = {

		.name = MOD_NAME,

	},

};



module_platform_driver(p1_regulator_driver);



MODULE_DESCRIPTION("SpacemiT P1 regulator driver");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:" MOD_NAME);