From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90236C433DF for ; Fri, 14 Aug 2020 15:27:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5D4FC20866 for ; Fri, 14 Aug 2020 15:27:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="M21M4p/N" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727886AbgHNP1f (ORCPT ); Fri, 14 Aug 2020 11:27:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46622 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726297AbgHNP1Z (ORCPT ); Fri, 14 Aug 2020 11:27:25 -0400 Received: from mail-pl1-x643.google.com (mail-pl1-x643.google.com [IPv6:2607:f8b0:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E6BD7C061384; Fri, 14 Aug 2020 08:27:24 -0700 (PDT) Received: by mail-pl1-x643.google.com with SMTP id f5so4322309plr.9; Fri, 14 Aug 2020 08:27:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=6PESmeoUjW2fKqrp7LdS6qEafazVRqSyS0MARpkUEoo=; b=M21M4p/NU7AXdkjPS6Jge1nzj5yk9/VCGKQkkkEWeg+UVIHxPsY4ZUp1dH6d1w7wIK ggZpH+mirPtLS81+ls/XZ3tKP60LzarwzBdY2hHmlXiQ3nqTMk8cTgGNaNzkNcYFD4mS KrQW1yg7tUk3pQLTgt3T2dbMMvW2ElO52F9JXyUy8flbSwaOIt+U4JG4GyXbx7BT6VAd a3JYqcCMH4XpBmzOp5jgNOuBSU5insEx3parVUtvwtKZyiR23plsfOvFCTu9HNHwBgEI Z+gUMYb0BDCk3go1cLBSul5Oqhz0gPHVwGmdiYX9OObB+BFWO0Dmi6D7DwhIqHjrtqJJ HD0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=6PESmeoUjW2fKqrp7LdS6qEafazVRqSyS0MARpkUEoo=; b=U0Npup2MPaU91vCaiLmwSl3g4kMKu3LPhDKPgWw54+FcoKxJCJ5o5vuWGrL1EEf0rf sTiJ8ZzsEFOL09n7ki5Nb3T5evF3zyitN+m478j8GcaON2H7kclzyooshood0TdtUD2f L2Z6IPbtTPBWcbdWxYDChJ/foOlEZuEelFyv8CnIgctSrGIhRp4yMZAXG+N7lORak5HT lUrng5vAjmuz4xcw+ZDsE2ttISLACScw6/sXktyOJh2SCx0zgVj7gtuJMaG/rTZEkvyR 1nI13r+FlL36TcL8ndujuiSQUQA/3Wx2MBC2ItXg8Ztg1s/pgavlRYui3EFpl8NFLjJ8 W+Fg== X-Gm-Message-State: AOAM530P2DKEsEUqE5E7UcLW0KJuxxQlLeN8aoOng8xE+FFN/2ScRPpU jqkDFmQKBrzpY+s3IEUlWqk= X-Google-Smtp-Source: ABdhPJxRREdeVCxyM1JZZ06Ce3hpwTUABb4f4Ec1vU/vEgTMStEWotVhrvBrSF2MUbh2/XU3Vxv+HA== X-Received: by 2002:a17:902:8504:: with SMTP id bj4mr2299389plb.231.1597418844336; Fri, 14 Aug 2020 08:27:24 -0700 (PDT) Received: from localhost.localdomain ([123.110.251.91]) by smtp.gmail.com with ESMTPSA id e29sm9746680pfj.92.2020.08.14.08.27.20 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 14 Aug 2020 08:27:23 -0700 (PDT) From: cy_huang To: lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org Cc: cy_huang@richtek.com, gene_chen@richtek.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 1/2] regulator: rt4801: Add support for RT4801 Display Bias regulator driver Date: Fri, 14 Aug 2020 23:27:03 +0800 Message-Id: <1597418824-15906-1-git-send-email-u0084500@gmail.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: ChiYuan Huang Adds support for the RT4801 DSV. It has two regulators (DSVP/DSVN) with an I2C interface. DSVP/DSVN can provide the display panel module for the positive/negative voltage range from (+/-)4V to (+/-)6V. Signed-off-by: ChiYuan Huang --- drivers/regulator/Kconfig | 7 ++ drivers/regulator/Makefile | 1 + drivers/regulator/rt4801-regulator.c | 223 +++++++++++++++++++++++++++++++++++ 3 files changed, 231 insertions(+) create mode 100644 drivers/regulator/rt4801-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index de17ef7..2786f11 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -894,6 +894,13 @@ config REGULATOR_RN5T618 config REGULATOR_ROHM tristate +config REGULATOR_RT4801 + tristate "Richtek RT4801 Regulators" + depends on I2C + help + This adds support for voltage regulators in Richtek RT4801 Display Bias IC. + The device supports two regulators (DSVP/DSVN). + config REGULATOR_RT5033 tristate "Richtek RT5033 Regulators" depends on MFD_RT5033 diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index d8d3ecf..d091e52d 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -111,6 +111,7 @@ obj-$(CONFIG_REGULATOR_RC5T583) += rc5t583-regulator.o obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o obj-$(CONFIG_REGULATOR_RN5T618) += rn5t618-regulator.o obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o +obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o diff --git a/drivers/regulator/rt4801-regulator.c b/drivers/regulator/rt4801-regulator.c new file mode 100644 index 00000000..0ddc670 --- /dev/null +++ b/drivers/regulator/rt4801-regulator.c @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include +#include +#include +#include +#include +#include +#include + +#define RT4801_REG_VOP 0x00 +#define RT4801_REG_VON 0x01 +#define RT4801_REG_APPS 0x03 + +#define VOUT_MASK 0x1F + +#define MIN_UV 4000000 +#define STEP_UV 100000 +#define MAX_UV 6000000 +#define N_VOLTAGES ((MAX_UV - MIN_UV) / STEP_UV + 1) + +#define DSV_OUT_POS 0 +#define DSV_OUT_NEG 1 +#define DSV_OUT_MAX 2 + +#define DSVP_ENABLE BIT(0) +#define DSVN_ENABLE BIT(1) +#define DSVALL_ENABLE (DSVP_ENABLE | DSVN_ENABLE) + +struct rt4801_priv { + struct device *dev; + struct gpio_descs *enable_gpios; + unsigned int enable_flag; + unsigned int volt_sel[DSV_OUT_MAX]; +}; + +static int rt4801_set_voltage_sel(struct regulator_dev *rdev, unsigned int selector) +{ + struct rt4801_priv *priv = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev), ret; + + if (priv->enable_flag & BIT(id)) { + ret = regulator_set_voltage_sel_regmap(rdev, selector); + if (ret) + return ret; + } + + priv->volt_sel[id] = selector; + return 0; +} + +static int rt4801_get_voltage_sel(struct regulator_dev *rdev) +{ + struct rt4801_priv *priv = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + + if (priv->enable_flag & BIT(id)) + return regulator_get_voltage_sel_regmap(rdev); + + return priv->volt_sel[id]; +} + +static int rt4801_enable(struct regulator_dev *rdev) +{ + struct rt4801_priv *priv = rdev_get_drvdata(rdev); + struct gpio_descs *gpios = priv->enable_gpios; + int id = rdev_get_id(rdev), ret; + + if (gpios->ndescs <= id) { + dev_warn(&rdev->dev, "no dedicated gpio can control\n"); + goto bypass_gpio; + } + + gpiod_set_value(gpios->desc[id], 1); + +bypass_gpio: + ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, priv->volt_sel[id]); + if (ret) + return ret; + + priv->enable_flag |= BIT(id); + return 0; +} + +static int rt4801_disable(struct regulator_dev *rdev) +{ + struct rt4801_priv *priv = rdev_get_drvdata(rdev); + struct gpio_descs *gpios = priv->enable_gpios; + int id = rdev_get_id(rdev); + + if (gpios->ndescs <= id) { + dev_warn(&rdev->dev, "no dedicated gpio can control\n"); + goto bypass_gpio; + } + + gpiod_set_value(gpios->desc[id], 0); + +bypass_gpio: + priv->enable_flag &= ~BIT(id); + return 0; +} + +static int rt4801_is_enabled(struct regulator_dev *rdev) +{ + struct rt4801_priv *priv = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + + return !!(priv->enable_flag & BIT(id)); +} + +static const struct regulator_ops rt4801_regulator_ops = { + .list_voltage = regulator_list_voltage_linear, + .set_voltage_sel = rt4801_set_voltage_sel, + .get_voltage_sel = rt4801_get_voltage_sel, + .enable = rt4801_enable, + .disable = rt4801_disable, + .is_enabled = rt4801_is_enabled, +}; + +static const struct regulator_desc rt4801_regulator_descs[] = { + { + .name = "DSVP", + .ops = &rt4801_regulator_ops, + .of_match = of_match_ptr("DSVP"), + .type = REGULATOR_VOLTAGE, + .id = DSV_OUT_POS, + .min_uV = MIN_UV, + .uV_step = STEP_UV, + .n_voltages = N_VOLTAGES, + .owner = THIS_MODULE, + .vsel_reg = RT4801_REG_VOP, + .vsel_mask = VOUT_MASK, + }, + { + .name = "DSVN", + .ops = &rt4801_regulator_ops, + .of_match = of_match_ptr("DSVN"), + .type = REGULATOR_VOLTAGE, + .id = DSV_OUT_NEG, + .min_uV = MIN_UV, + .uV_step = STEP_UV, + .n_voltages = N_VOLTAGES, + .owner = THIS_MODULE, + .vsel_reg = RT4801_REG_VON, + .vsel_mask = VOUT_MASK, + }, +}; + +static const struct regmap_config rt4801_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = RT4801_REG_APPS, +}; + +static int rt4801_probe(struct i2c_client *i2c) +{ + struct rt4801_priv *priv; + struct regmap *regmap; + int i; + + priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = &i2c->dev; + /* bootloader will on, driver only reconfigure enable to all output high */ + priv->enable_flag = DSVALL_ENABLE; + + regmap = devm_regmap_init_i2c(i2c, &rt4801_regmap_config); + if (IS_ERR(regmap)) { + dev_err(&i2c->dev, "Failed to init regmap\n"); + return PTR_ERR(regmap); + } + + priv->enable_gpios = devm_gpiod_get_array_optional(&i2c->dev, "enable", GPIOD_OUT_HIGH); + if (IS_ERR(priv->enable_gpios)) { + dev_err(&i2c->dev, "Failed to get gpios\n"); + return PTR_ERR(priv->enable_gpios); + } + + for (i = 0; i < DSV_OUT_MAX; i++) { + const struct regulator_desc *desc = rt4801_regulator_descs + i; + struct regulator_config config = { .dev = &i2c->dev, .driver_data = priv, + .regmap = regmap, }; + struct regulator_dev *rdev; + unsigned int val; + int ret; + + /* initialize volt_sel variable */ + ret = regmap_read(regmap, desc->vsel_reg, &val); + if (ret) + return ret; + + priv->volt_sel[i] = val & desc->vsel_mask; + + rdev = devm_regulator_register(&i2c->dev, desc, &config); + if (IS_ERR(rdev)) { + dev_err(&i2c->dev, "Failed to register [%d] regulator\n", i); + return PTR_ERR(rdev); + } + } + + return 0; +} + +static const struct of_device_id rt4801_of_id[] = { + { .compatible = "richtek,rt4801", }, + { }, +}; +MODULE_DEVICE_TABLE(of, rt4801_of_id); + +static struct i2c_driver rt4801_driver = { + .driver = { + .name = "rt4801", + .of_match_table = of_match_ptr(rt4801_of_id), + }, + .probe_new = rt4801_probe, +}; +module_i2c_driver(rt4801_driver); + +MODULE_AUTHOR("ChiYuan Hwang "); +MODULE_DESCRIPTION("Richtek RT4801 Display Bias Driver"); +MODULE_LICENSE("GPL v2"); -- 2.7.4