From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752157AbcFWTc1 (ORCPT ); Thu, 23 Jun 2016 15:32:27 -0400 Received: from megous.com ([83.167.254.221]:35669 "EHLO xff.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751010AbcFWTcW (ORCPT ); Thu, 23 Jun 2016 15:32:22 -0400 From: megous@megous.com To: dev@linux-sunxi.org Cc: linux-arm-kernel@lists.infradead.org, Ondrej Jirman , Liam Girdwood , Mark Brown , linux-kernel@vger.kernel.org (open list) Subject: [PATCH 07/14] regulator: SY8106A regulator driver Date: Thu, 23 Jun 2016 21:20:57 +0200 Message-Id: <20160623192104.18720-8-megous@megous.com> X-Mailer: git-send-email 2.9.0 In-Reply-To: <20160623192104.18720-1-megous@megous.com> References: <20160623192104.18720-1-megous@megous.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ondrej Jirman SY8106A is I2C attached single output voltage regulator made by Silergy. Signed-off-by: Ondrej Jirman --- drivers/regulator/Kconfig | 8 +- drivers/regulator/Makefile | 2 +- drivers/regulator/sy8106a-regulator.c | 153 ++++++++++++++++++++++++++++++++++ 3 files changed, 161 insertions(+), 2 deletions(-) create mode 100644 drivers/regulator/sy8106a-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 144cbf5..fc3fae2 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -860,5 +860,11 @@ config REGULATOR_WM8994 This driver provides support for the voltage regulators on the WM8994 CODEC. -endif +config REGULATOR_SY8106A + tristate "Silergy SY8106A" + depends on I2C + select REGMAP_I2C + help + This driver provides support for the voltage regulator SY8106A. +endif diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 85a1d44..f382095 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -110,6 +110,6 @@ obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o - +obj-$(CONFIG_REGULATOR_SY8106A) += sy8106a-regulator.o ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG diff --git a/drivers/regulator/sy8106a-regulator.c b/drivers/regulator/sy8106a-regulator.c new file mode 100644 index 0000000..34bd69c --- /dev/null +++ b/drivers/regulator/sy8106a-regulator.c @@ -0,0 +1,153 @@ +/* + * sy8106a-regulator.c - Regulator device driver for SY8106A + * + * Copyright (C) 2016 Ondřej Jirman + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define SY8106A_REG_VOUT1_SEL 0x01 +#define SY8106A_REG_VOUT_COM 0x02 +#define SY8106A_REG_VOUT1_SEL_MASK 0x7f +#define SY8106A_DISABLE_REG 0x01 + +struct sy8106a { + struct regulator_dev *rdev; + struct regmap *regmap; +}; + +static const struct regmap_config sy8106a_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int sy8106a_set_voltage_sel(struct regulator_dev *rdev, unsigned sel) +{ + return regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg, + 0xff, sel | 0x80); +} + +static const struct regulator_ops sy8106a_ops = { + .is_enabled = regulator_is_enabled_regmap, + .set_voltage_sel = sy8106a_set_voltage_sel, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .list_voltage = regulator_list_voltage_linear, +}; + +/* Default limits measured in millivolts and milliamps */ +#define SY8106A_MIN_MV 680 +#define SY8106A_MAX_MV 1950 +#define SY8106A_STEP_MV 10 + +static const struct regulator_desc sy8106a_reg = { + .name = "SY8106A", + .id = 0, + .ops = &sy8106a_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = ((SY8106A_MAX_MV - SY8106A_MIN_MV) / SY8106A_STEP_MV) + 1, + .min_uV = (SY8106A_MIN_MV * 1000), + .uV_step = (SY8106A_STEP_MV * 1000), + .vsel_reg = SY8106A_REG_VOUT1_SEL, + .vsel_mask = SY8106A_REG_VOUT1_SEL_MASK, + .enable_reg = SY8106A_REG_VOUT_COM, + .enable_mask = SY8106A_DISABLE_REG, + .disable_val = SY8106A_DISABLE_REG, + .enable_is_inverted = 1, + .owner = THIS_MODULE, +}; + +/* + * I2C driver interface functions + */ +static int sy8106a_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct sy8106a *chip; + struct device *dev = &i2c->dev; + struct regulator_dev *rdev = NULL; + struct regulator_config config = { }; + unsigned int selector; + int error; + + chip = devm_kzalloc(&i2c->dev, sizeof(struct sy8106a), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->regmap = devm_regmap_init_i2c(i2c, &sy8106a_regmap_config); + if (IS_ERR(chip->regmap)) { + error = PTR_ERR(chip->regmap); + dev_err(&i2c->dev, "Failed to allocate register map: %d\n", + error); + return error; + } + + config.dev = &i2c->dev; + config.init_data = of_get_regulator_init_data(dev, dev->of_node, &sy8106a_reg); + config.driver_data = chip; + config.regmap = chip->regmap; + config.of_node = dev->of_node; + + /* Probe regulator */ + error = regmap_read(chip->regmap, SY8106A_REG_VOUT1_SEL, &selector); + dev_info(&i2c->dev, "SY8106A voltage at boot: %u mV\n", SY8106A_MIN_MV + SY8106A_STEP_MV * (selector & SY8106A_REG_VOUT1_SEL_MASK)); + if (error) { + dev_err(&i2c->dev, "Failed to read voltage at probe time: %d\n", error); + return error; + } + + rdev = devm_regulator_register(&i2c->dev, &sy8106a_reg, &config); + if (IS_ERR(rdev)) { + dev_err(&i2c->dev, "Failed to register SY8106A regulator\n"); + return PTR_ERR(rdev); + } + + chip->rdev = rdev; + + i2c_set_clientdata(i2c, chip); + + return 0; +} + +static const struct i2c_device_id sy8106a_i2c_id[] = { + {"sy8106a", 0}, + {}, +}; + +MODULE_DEVICE_TABLE(i2c, sy8106a_i2c_id); + +static struct i2c_driver sy8106a_regulator_driver = { + .driver = { + .name = "sy8106a", + }, + .probe = sy8106a_i2c_probe, + .id_table = sy8106a_i2c_id, +}; + +module_i2c_driver(sy8106a_regulator_driver); + +MODULE_AUTHOR("Ondřej Jirman "); +MODULE_DESCRIPTION("Regulator device driver for Silergy SY8106A"); +MODULE_LICENSE("GPL v2"); -- 2.9.0