From patchwork Thu May 27 05:14:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: cy_huang X-Patchwork-Id: 449701 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 0E120C47089 for ; Thu, 27 May 2021 05:14:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CDED8613D8 for ; Thu, 27 May 2021 05:14:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232975AbhE0FPv (ORCPT ); Thu, 27 May 2021 01:15:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232416AbhE0FPv (ORCPT ); Thu, 27 May 2021 01:15:51 -0400 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 362DBC061574; Wed, 26 May 2021 22:14:19 -0700 (PDT) Received: by mail-pj1-x102e.google.com with SMTP id k5so2073399pjj.1; Wed, 26 May 2021 22:14:19 -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=69dcfTu5Rod0MWZh6A/dLucdJd56m6mON5Jg30AVkEw=; b=ZerdkHAiFtuXv7GhELtNt1zIuw02exnSjnKN5h5dW6+oMhTwDHbc96dLRmNOW871qY H0uCNGHRCO2r3IwMnOuflFgfUd2oKl2ltSSJG7qZdx2ToGHK/XmTrRJ06XfMO6ZNq10z GFQ+EhO7sO53v8pjM1rYL97weR4fvnXJ6csz2fOpg3rfuu4EBTf6dgGh7VXRbH9xUkb3 v8pTFXXmJ0Yb34sRqw7gm/xaRYpZFIKejd28l9XkKqDaDXg4ZwypBPDyXXkMddpJBJcZ bif6YOxK9bdAyO6Rlns0LTBdrdZCe60dE1rhdMK4FQVnNfFaG4Cg5nu5TRx9rGbUG3vu JFqA== 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=69dcfTu5Rod0MWZh6A/dLucdJd56m6mON5Jg30AVkEw=; b=q+zPVmuyQiWLIUIX8o+3LZy3dchaLBdX35wEJzzjr4CBZEtmzlLK4EPU5sSVhynI4Y z9H6AL1HwAQKlDktFpR4dMjLzrY1WbbVPkqPBTAUEkblV2Sqr4J8w8QaU9cZ3HKB+HXJ UiOvr32HKks7HXz4ykbs8u+dYBtWcvY/wxSGjXtseNODLcgAIpRydi5AFZ/nxaxJgzDs j7nmudZsZasv4SWv7fvz7dUKFYGXvDhHpLrI4Ei/9ayxHpL4+GbtoGcXG2o91AknY+hH Ag15zbk0sJhnbREoO/u0T3+AbLHR1/xLt/LUN4Eo0xnjBEvgC/wbDRVNFdIBGCUY7T3S RQsw== X-Gm-Message-State: AOAM5306E5axmBoZo2eSwHa0w6B7nq+CIgfk/p4XCqCnAmEnGm2gYI+4 AFmQqXl8FYUVKe/NOAln0Nc= X-Google-Smtp-Source: ABdhPJz7WTL1GRH7P66Tsj7yNG7KLXa+p8CKTLEsMfhfQ/VXJZLl1yPkq0yJKUK2DUme2u0UCho49w== X-Received: by 2002:a17:902:bc44:b029:fd:ea73:a2d0 with SMTP id t4-20020a170902bc44b02900fdea73a2d0mr1761022plz.3.1622092458494; Wed, 26 May 2021 22:14:18 -0700 (PDT) Received: from localhost.localdomain (1-171-23-132.dynamic-ip.hinet.net. [1.171.23.132]) by smtp.gmail.com with ESMTPSA id cu2sm706424pjb.43.2021.05.26.22.14.14 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 26 May 2021 22:14:17 -0700 (PDT) From: cy_huang To: lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org Cc: cy_huang@richtek.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v2 1/2] regulator: rt6245: Add the binding document for Richtek RT6245 Date: Thu, 27 May 2021 13:14:08 +0800 Message-Id: <1622092449-21461-1-git-send-email-u0084500@gmail.com> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: ChiYuan Huang Add the binding document for Richtek RT6245. Signed-off-by: ChiYuan Huang Reviewed-by: Rob Herring --- .../regulator/richtek,rt6245-regulator.yaml | 89 ++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt6245-regulator.yaml diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt6245-regulator.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt6245-regulator.yaml new file mode 100644 index 00000000..796ceac --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/richtek,rt6245-regulator.yaml @@ -0,0 +1,89 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/regulator/richtek,rt6245-regulator.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Richtek RT6245 High Current Voltage Regulator + +maintainers: + - ChiYuan Huang + +description: | + The RT6245 is a high-performance, synchronous step-down converter + that can deliver up to 14A output current with an input supply + voltage range of 4.5V to 17V. + +allOf: + - $ref: regulator.yaml# + +properties: + compatible: + enum: + - richtek,rt6245 + + reg: + maxItems: 1 + + enable-gpios: + description: | + A connection of the chip 'enable' gpio line. If not provided, + it will be treat as a default-on power. + maxItems: 1 + + richtek,oc-level-select: + $ref: "/schemas/types.yaml#/definitions/uint8" + enum: [0, 1, 2, 3] + description: | + Over current level selection. Each respective value means the current + limit 8A, 14A, 12A, 10A. If this property is missing then keep in + in chip default. + + richtek,ot-level-select: + $ref: "/schemas/types.yaml#/definitions/uint8" + enum: [0, 1, 2] + description: | + Over temperature level selection. Each respective value means the degree + 150'c, 130'c, 170'c. If this property is missing then keep in chip + default. + + richtek,pgdly-time-select: + $ref: "/schemas/types.yaml#/definitions/uint8" + enum: [0, 1, 2, 3] + description: | + Power good signal delay time selection. Each respective value means the + delay time 0us, 10us, 20us, 40us. If this property is missing then keep + in chip default. + + + richtek,switch-freq-select: + $ref: "/schemas/types.yaml#/definitions/uint8" + enum: [0, 1, 2] + description: | + Buck switch frequency selection. Each respective value means 400KHz, + 800KHz, 1200KHz. If this property is missing then keep in chip default. + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + rt6245@34 { + compatible = "richtek,rt6245"; + status = "okay"; + reg = <0x34>; + enable-gpios = <&gpio26 2 0>; + + regulator-name = "rt6245-regulator"; + regulator-min-microvolt = <437500>; + regulator-max-microvolt = <1387500>; + regulator-boot-on; + }; + }; From patchwork Thu May 27 05:14:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: cy_huang X-Patchwork-Id: 449023 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 145C2C4707F for ; Thu, 27 May 2021 05:14:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DC6C5613CC for ; Thu, 27 May 2021 05:14:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233689AbhE0FP5 (ORCPT ); Thu, 27 May 2021 01:15:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34734 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233563AbhE0FPy (ORCPT ); Thu, 27 May 2021 01:15:54 -0400 Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F516C061574; Wed, 26 May 2021 22:14:21 -0700 (PDT) Received: by mail-pf1-x42c.google.com with SMTP id q67so2751368pfb.4; Wed, 26 May 2021 22:14:21 -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:in-reply-to:references; bh=53Eza6IIWvQZ2+MOVEINVFrLGHYsHFKL8NUyL3HUVbo=; b=a1GK7LxwlITgdFTSY8jjB4JpIkwn0epjP7gGQsOGvv1Qkw9a4Nsx9P6WTKElNmBgnd nAzW9abP1KM+LyD9kwQ2ImHHPYvTb0o8LU/X73nXGb+B14mqVRDDARPd2oXhiRJZxD13 FrSWp9HvZTKmHT2oJoPFny1x8fMdEmFeTX4PYhcdNkNFxvkZ+Mi7nYMNREcEl4J0Dmrj n525r/kUaQyRRfhihbp5Ziy+FzjazxF2C/hm9+yvR12UT3je3q3NlwmKGClpOtFXObEx aNwKguYCNv7v0M05IR4YEpY8Hbe+1S2W4No8a2IPjGZULpx3jzL4hlEVXO3jnVu6crSg vNlg== 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:in-reply-to :references; bh=53Eza6IIWvQZ2+MOVEINVFrLGHYsHFKL8NUyL3HUVbo=; b=fXqOi6BbVMHqbWO9aWn1rFkGXnaF/tNs9i6D0wnGCc9ocg29nxAYY64vwcl7crGfDK sh5HsaTcTcklQu4GhelED3t5/rgydIq0DOVReJ/VQHOXrRvYIbl0PsoFpyz206t4wM3O d3k/yziSTQd5w5gibWmRuwqFO0gQ7+PXI2cMwpGcFAJ4uUoefv1gfKR4cDoPNIf9HfEH 6Ujr5y/KJFiSaoNtIjs1u0QPdyLZ5YIo8RRFew3r9rn9DAwUdJqW2OG0iaP8W+VLJavg c/e6k2osvZi/qG1D4p7c4FuHzNRqMmiZTnVHcTkpylamG+wSw2R5pYDMd52v49De5HEY RfgQ== X-Gm-Message-State: AOAM533SvmAMQABjZn/9bb9kgxL9zcM/rRL0i4/rerC9AMtgpTj12mIA 93UvlJC70G9Afc8CCCpiF6OztjQN3Xs= X-Google-Smtp-Source: ABdhPJx6DMpJcXYltoQxwwKQb5pMEElNNcPUDRDeRWxnrv/J5Y/CAXDNOyPfyGVBAnzAYnWSoZ7zTQ== X-Received: by 2002:a65:550e:: with SMTP id f14mr2071408pgr.160.1622092460864; Wed, 26 May 2021 22:14:20 -0700 (PDT) Received: from localhost.localdomain (1-171-23-132.dynamic-ip.hinet.net. [1.171.23.132]) by smtp.gmail.com with ESMTPSA id cu2sm706424pjb.43.2021.05.26.22.14.18 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 26 May 2021 22:14:20 -0700 (PDT) From: cy_huang To: lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org Cc: cy_huang@richtek.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v2 2/2] regulator: rt6245: Add support for Richtek RT6245 Date: Thu, 27 May 2021 13:14:09 +0800 Message-Id: <1622092449-21461-2-git-send-email-u0084500@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1622092449-21461-1-git-send-email-u0084500@gmail.com> References: <1622092449-21461-1-git-send-email-u0084500@gmail.com> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: ChiYuan Huang Richtek RT6245 is a high-performance, synchronous step-down converter that can deliver up to 14A output current with an input supply voltage range of 4.5V to 17V. Signed-off-by: ChiYuan Huang --- since v2 - Use hweight8 to fix x86 __sw_hweight8 undefined. --- drivers/regulator/Kconfig | 9 ++ drivers/regulator/Makefile | 1 + drivers/regulator/rt6245-regulator.c | 260 +++++++++++++++++++++++++++++++++++ 3 files changed, 270 insertions(+) create mode 100644 drivers/regulator/rt6245-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 9d84d92..cdec434 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -1030,6 +1030,15 @@ config REGULATOR_RT5033 RT5033 PMIC. The device supports multiple regulators like current source, LDO and Buck. +config REGULATOR_RT6245 + tristate "Richtek RT6245 voltage regulator" + depends on I2C + select REGMAP_I2C + help + This adds supprot for Richtek RT6245 voltage regulator. + It can support up to 14A output current and adjustable output voltage + from 0.4375V to 1.3875V, per step 12.5mV. + config REGULATOR_RTMV20 tristate "RTMV20 Laser Diode Regulator" depends on I2C diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 580b015..69668bf 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -124,6 +124,7 @@ obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o obj-$(CONFIG_REGULATOR_RT4831) += rt4831-regulator.o obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o +obj-$(CONFIG_REGULATOR_RT6245) += rt6245-regulator.o obj-$(CONFIG_REGULATOR_RTMV20) += rtmv20-regulator.o obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o diff --git a/drivers/regulator/rt6245-regulator.c b/drivers/regulator/rt6245-regulator.c new file mode 100644 index 00000000..e4032b0 --- /dev/null +++ b/drivers/regulator/rt6245-regulator.c @@ -0,0 +1,260 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RT6245_VIRT_OCLIMIT 0x00 +#define RT6245_VIRT_OTLEVEL 0x01 +#define RT6245_VIRT_PGDLYTIME 0x02 +#define RT6245_VIRT_SLEWRATE 0x03 +#define RT6245_VIRT_SWFREQ 0x04 +#define RT6245_VIRT_VOUT 0x05 + +#define RT6245_VOUT_MASK GENMASK(6, 0) +#define RT6245_CHKSUM_MASK BIT(7) +#define RT6245_CODE_MASK GENMASK(6, 0) + +/* HW Enable + Soft start time */ +#define RT6245_ENTIME_IN_US 5000 + +#define RT6245_RAMPT_UNIT_0P1UV 15625 +#define RT6245_RAMPT_MAXUV 12500 +#define RT6245_RAMPT_BASESEL 1 + +#define RT6245_VOUT_MINUV 437500 +#define RT6245_VOUT_MAXUV 1387500 +#define RT6245_VOUT_STEPUV 12500 +#define RT6245_NUM_VOUT ((RT6245_VOUT_MAXUV - RT6245_VOUT_MINUV) / RT6245_VOUT_STEPUV + 1) + +struct rt6245_priv { + struct gpio_desc *enable_gpio; + bool enable_state; +}; + +static int rt6245_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int ramp_time_scale; + + if (ramp_delay == 0 || ramp_delay > RT6245_RAMPT_MAXUV) { + dev_warn(&rdev->dev, "Not in ramp time range %d, set to fastest\n", ramp_delay); + ramp_delay = RT6245_RAMPT_MAXUV; + } + + /* ramp_time = max_ramp_time / ramp_time_scale, scale from 1 to 8 */ + ramp_delay = max(ramp_delay * 10, RT6245_RAMPT_UNIT_0P1UV); + ramp_time_scale = (RT6245_RAMPT_MAXUV * 10) / ramp_delay; + ramp_time_scale -= RT6245_RAMPT_BASESEL; + + return regmap_write(regmap, RT6245_VIRT_SLEWRATE, ramp_time_scale); +} + +static int rt6245_enable(struct regulator_dev *rdev) +{ + struct rt6245_priv *priv = rdev_get_drvdata(rdev); + struct regmap *regmap = rdev_get_regmap(rdev); + + if (!priv->enable_gpio) + return 0; + + priv->enable_state = true; + gpiod_direction_output(priv->enable_gpio, 1); + usleep_range(RT6245_ENTIME_IN_US, RT6245_ENTIME_IN_US + 1000); + + regcache_cache_only(regmap, false); + return regcache_sync(regmap); +} + +static int rt6245_disable(struct regulator_dev *rdev) +{ + struct rt6245_priv *priv = rdev_get_drvdata(rdev); + struct regmap *regmap = rdev_get_regmap(rdev); + + if (!priv->enable_gpio) + return -ENOTSUPP; + + priv->enable_state = false; + gpiod_direction_output(priv->enable_gpio, 0); + + regcache_cache_only(regmap, true); + regcache_mark_dirty(regmap); + + return 0; +} + +static int rt6245_is_enabled(struct regulator_dev *rdev) +{ + struct rt6245_priv *priv = rdev_get_drvdata(rdev); + + return priv->enable_state ? 1 : 0; +} + +static const struct regulator_ops rt6245_regulator_ops = { + .list_voltage = regulator_list_voltage_linear, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_ramp_delay = rt6245_set_ramp_delay, + .enable = rt6245_enable, + .disable = rt6245_disable, + .is_enabled = rt6245_is_enabled, +}; + +static const struct regulator_desc rt6245_regulator_desc = { + .name = "rt6245-regulator", + .ops = &rt6245_regulator_ops, + .type = REGULATOR_VOLTAGE, + .min_uV = RT6245_VOUT_MINUV, + .uV_step = RT6245_VOUT_STEPUV, + .n_voltages = RT6245_NUM_VOUT, + .owner = THIS_MODULE, + .vsel_reg = RT6245_VIRT_VOUT, + .vsel_mask = RT6245_VOUT_MASK, +}; + +static int rt6245_init_device_properties(struct device *dev) +{ + struct { + const char *name; + unsigned int reg; + } rt6245_props[] = { + { "richtek,oc-level-select", RT6245_VIRT_OCLIMIT }, + { "richtek,ot-level-select", RT6245_VIRT_OTLEVEL }, + { "richtek,pgdly-time-select", RT6245_VIRT_PGDLYTIME }, + { "richtek,switch-freq-select", RT6245_VIRT_SWFREQ } + }; + struct regmap *regmap = dev_get_regmap(dev, NULL); + u8 propval; + int i, ret; + + for (i = 0; i < ARRAY_SIZE(rt6245_props); i++) { + ret = device_property_read_u8(dev, rt6245_props[i].name, &propval); + if (ret) + continue; + + ret = regmap_write(regmap, rt6245_props[i].reg, propval); + if (ret) { + dev_err(dev, "Fail to apply [%s:%d]\n", rt6245_props[i].name, propval); + return ret; + } + } + + return 0; +} + +static int rt6245_reg_write(void *context, unsigned int reg, unsigned int val) +{ + struct i2c_client *i2c = context; + const u8 func_base[] = { 0x6F, 0x73, 0x78, 0x61, 0x7C, 0 }; + unsigned int code, bit_count; + + code = func_base[reg]; + code += val; + + /* xor checksum for bit 6 to 0 */ + bit_count = hweight8(code & RT6245_CODE_MASK); + if (bit_count % 2) + code |= RT6245_CHKSUM_MASK; + else + code &= ~RT6245_CHKSUM_MASK; + + return i2c_smbus_write_byte(i2c, code); +} + +static const struct reg_default rt6245_reg_defaults[] = { + /* Default over current 14A */ + { RT6245_VIRT_OCLIMIT, 2 }, + /* Default over temperature 150'c */ + { RT6245_VIRT_OTLEVEL, 0 }, + /* Default power good delay time 10us */ + { RT6245_VIRT_PGDLYTIME, 1 }, + /* Default slewrate 12.5mV/uS */ + { RT6245_VIRT_SLEWRATE, 0 }, + /* Default switch frequency 800KHz */ + { RT6245_VIRT_SWFREQ, 1 }, + /* Default voltage 750mV */ + { RT6245_VIRT_VOUT, 0x19 } +}; + +static const struct regmap_config rt6245_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = RT6245_VIRT_VOUT, + .cache_type = REGCACHE_FLAT, + .reg_defaults = rt6245_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(rt6245_reg_defaults), + .reg_write = rt6245_reg_write, +}; + +static int rt6245_probe(struct i2c_client *i2c) +{ + struct rt6245_priv *priv; + struct regmap *regmap; + struct regulator_config regulator_cfg = {}; + struct regulator_dev *rdev; + int ret; + + priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->enable_state = true; + + priv->enable_gpio = devm_gpiod_get_optional(&i2c->dev, "enable", GPIOD_OUT_HIGH); + if (IS_ERR(priv->enable_gpio)) { + dev_err(&i2c->dev, "Failed to get 'enable' gpio\n"); + return PTR_ERR(priv->enable_gpio); + } + usleep_range(RT6245_ENTIME_IN_US, RT6245_ENTIME_IN_US + 1000); + + regmap = devm_regmap_init(&i2c->dev, NULL, i2c, &rt6245_regmap_config); + if (IS_ERR(regmap)) { + dev_err(&i2c->dev, "Failed to initialize the regmap\n"); + return PTR_ERR(regmap); + } + + ret = rt6245_init_device_properties(&i2c->dev); + if (ret) { + dev_err(&i2c->dev, "Failed to initialize device properties\n"); + return ret; + } + + regulator_cfg.dev = &i2c->dev; + regulator_cfg.of_node = i2c->dev.of_node; + regulator_cfg.regmap = regmap; + regulator_cfg.driver_data = priv; + regulator_cfg.init_data = of_get_regulator_init_data(&i2c->dev, i2c->dev.of_node, + &rt6245_regulator_desc); + rdev = devm_regulator_register(&i2c->dev, &rt6245_regulator_desc, ®ulator_cfg); + if (IS_ERR(rdev)) { + dev_err(&i2c->dev, "Failed to register regulator\n"); + return PTR_ERR(rdev); + } + + return 0; +} + +static const struct of_device_id __maybe_unused rt6245_of_match_table[] = { + { .compatible = "richtek,rt6245", }, + {} +}; +MODULE_DEVICE_TABLE(of, rt6245_of_match_table); + +static struct i2c_driver rt6245_driver = { + .driver = { + .name = "rt6245", + .of_match_table = rt6245_of_match_table, + }, + .probe_new = rt6245_probe, +}; +module_i2c_driver(rt6245_driver); + +MODULE_AUTHOR("ChiYuan Hwang "); +MODULE_DESCRIPTION("Richtek RT6245 Regulator Driver"); +MODULE_LICENSE("GPL v2");