From patchwork Thu Apr 4 16:19:23 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Figa X-Patchwork-Id: 2393801 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 64DDC4020C for ; Thu, 4 Apr 2013 16:20:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762945Ab3DDQUJ (ORCPT ); Thu, 4 Apr 2013 12:20:09 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:52315 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763041Ab3DDQUG (ORCPT ); Thu, 4 Apr 2013 12:20:06 -0400 Received: from epcpsbgm2.samsung.com (epcpsbgm2 [203.254.230.27]) by mailout1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0MKQ00GAUO1A4830@mailout1.samsung.com>; Fri, 05 Apr 2013 01:20:04 +0900 (KST) X-AuditID: cbfee61b-b7f076d0000034b6-c1-515da8345ff2 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id 35.F8.13494.438AD515; Fri, 05 Apr 2013 01:20:04 +0900 (KST) Received: from mcdsrvbld02.digital.local ([106.116.37.23]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0MKQ00FT8O0RMK40@mmp1.samsung.com>; Fri, 05 Apr 2013 01:20:04 +0900 (KST) From: Tomasz Figa To: linux-kernel@vger.kernel.org Cc: devicetree-discuss@lists.ozlabs.org, linux-samsung-soc@vger.kernel.org, kyungmin.park@samsung.com, lrg@ti.com, broonie@opensource.wolfsonmicro.com, m.szyprowski@samsung.com, kgene.kim@samsung.com, Tomasz Figa Subject: [PATCH 3/3] mfd: max8998: Add support for Device Tree Date: Thu, 04 Apr 2013 18:19:23 +0200 Message-id: <1365092363-12763-4-git-send-email-t.figa@samsung.com> X-Mailer: git-send-email 1.7.10 In-reply-to: <1365092363-12763-1-git-send-email-t.figa@samsung.com> References: <1365092363-12763-1-git-send-email-t.figa@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprLLMWRmVeSWpSXmKPExsVy+t9jAV2TFbGBBuvmKVr8m32KzeLA7Ies Fr0LrrJZnG16w25xedccNosZ5/cxWTRtn8BusfbIXXaL9TNeszhwepyfsZDR4+XE32wefVtW MXocv7GdyePzJrkA1igum5TUnMyy1CJ9uwSujCkr3jAW/G5nrDjVM5GtgfFfbhcjJ4eEgInE 49/T2CBsMYkL99YD2VwcQgKLGCV6Z+9mBEkICXQxSdyeVAFiswmoSXxueATWICKgILG59xkr SAOzwHtGiStPXgI5HBzCAnYSnXPLQWpYBFQlZl36AjaHV8BJ4tuEJewQy+Qlnt7vYwMp5xRw ljg0WRtilZPEs8+3GScw8i5gZFjFKJpakFxQnJSea6RXnJhbXJqXrpecn7uJERxoz6R3MK5q sDjEKMDBqMTDm9EXGyjEmlhWXJl7iFGCg1lJhPdoC1CINyWxsiq1KD++qDQntfgQozQHi5I4 78FW60AhgfTEktTs1NSC1CKYLBMHp1QDo5Bx66cd/i/fR9rFFMm8nKHxfPX/qKCtfm3uNhFq z08EGZ7Ssnx/gudTx4q/DBd/bf+YYLe72cVW4cm3RM77OStK5+pY8IQeuzorR73he1fsXY3i zV4PFFY06ex4mr7Qt9hhU8neSGke3n0CmoHHPHb+/9i94k3jrqSJFx7OnRO6PeYHQ4uOhRJL cUaioRZzUXEiAI/0AP4wAgAA Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org This patch adds Device Tree support to max8998 driver. Signed-off-by: Tomasz Figa Signed-off-by: Kyungmin Park --- Documentation/devicetree/bindings/mfd/max8998.txt | 111 +++++++++++++++ drivers/mfd/max8998.c | 75 +++++++++- drivers/regulator/max8998.c | 158 +++++++++++++++++++++- drivers/rtc/rtc-max8998.c | 2 +- include/linux/mfd/max8998-private.h | 2 + include/linux/mfd/max8998.h | 2 + 6 files changed, 343 insertions(+), 7 deletions(-) create mode 100644 Documentation/devicetree/bindings/mfd/max8998.txt diff --git a/Documentation/devicetree/bindings/mfd/max8998.txt b/Documentation/devicetree/bindings/mfd/max8998.txt new file mode 100644 index 0000000..80ac378 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/max8998.txt @@ -0,0 +1,111 @@ +* Maxim MAX8998, National/TI LP3974 Voltage and Current Regulator + +The Maxim MAX8998 is a multi-function device which includes volatage and +current regulators, rtc, charger controller and other sub-blocks. It is +interfaced to the host controller using a i2c interface. Each sub-block is +addressed by the host system using different i2c slave address. This document +describes the bindings for 'pmic' sub-block of max8998. + +Required properties: +- compatible: Should be one of the following: + - "maxim,max8998" for Maxim MAX8998 + - "national,lp3974" or "ti,lp3974" for National/TI LP3974. +- reg: Specifies the i2c slave address of the pmic block. It should be 0x66. + +Optional properties: +- interrupt-parent: Specifies the phandle of the interrupt controller to which + the interrupts from max8998 are delivered to. +- interrupts: Interrupt specifiers for two interrupt sources. + - First interrupt specifier is for 'irq1' interrupt. + - Second interrupt specifier is for 'alert' interrupt. +- max8998,pmic-buck1-dvs-gpios: GPIO specifiers for two host gpios used + for buck 1 dvs. The format of the gpio specifier depends in the gpio + controller. +- max8998,pmic-buck2-dvs-gpio: GPIO specifier for host gpio used + for buck 2 dvs. The format of the gpio specifier depends in the gpio + controller. +- max8998,pmic-buck1-default-dvs-idx: Default voltage setting selected from + the possible 4 options selectable by the dvs gpios. The value of this + property should be between 0 and 3. If not specified or if out of range, the + default value of this property is set to 0. +- max8998,pmic-buck2-default-dvs-idx: Default voltage setting selected from + the possible 2 options selectable by the dvs gpios. The value of this + property should be between 0 and 1. If not specified or if out of range, the + default value of this property is set to 0. +- max8998,pmic-buck-voltage-lock: If present, disallows changing of + preprogrammed buck dvfs voltages. + +Additional properties required if max8998,pmic-buck1-dvs-gpios is defined: +- max8998,pmic-buck1-dvs-voltage: A set of 4 voltage values in micro-volt (uV) + units for buck1 when changing voltage using gpio dvs. + +Additional properties required if max8998,pmic-buck2-dvs-gpio is defined: +- max8998,pmic-buck2-dvs-voltage: A set of 2 voltage values in micro-volt (uV) + units for buck2 when changing voltage using gpio dvs. + +Regulators: The regulators of max8998 that have to be instantiated should be +included in a sub-node named 'regulators'. Regulator nodes included in this +sub-node should be of the format as listed below. + + regulator_name { + standard regulator bindings here + }; + +The following are the names of the regulators that the max8998 pmic block +supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number +as per the datasheet of max8998. + + - LDOn + - valid values for n are 2 to 17 + - Example: LDO2, LDO10, LDO17 + - BUCKn + - valid values for n are 1 to 4. + - Example: BUCK1, BUCK2, BUCK3, BUCK4 + + - ENVICHG: Battery Charging Current Monitor Output. This is a fixed + voltage type regulator + + - ESAFEOUT1: (ldo19) + - ESAFEOUT2: (ld020) + + - EN32KHz AP: 32KHz clock output for application processor + - EN32KHz CP: 32KHz clock output for call processor + +The bindings inside the regulator nodes use the standard regulator bindings +which are documented elsewhere. + +Example: + + max8998_pmic@66 { + compatible = "maxim,max8998-pmic"; + interrupt-parent = <&wakeup_eint>; + reg = <0x66>; + interrupts = <4 0>, <3 0>; + + max8998,pmic-buck1-default-dvs-idx = <0>; + max8998,pmic-buck1-dvs-gpios = <&gpx0 0 1 0 0>, /* SET1 */ + <&gpx0 1 1 0 0>; /* SET2 */ + max8998,pmic-buck1-dvs-voltage = <1350000>, <1300000>, + <1000000>, <950000>; + + max8998,pmic-buck2-default-dvs-idx = <0>; + max8998,pmic-buck2-dvs-gpio = <&gpx0 0 3 0 0>; /* SET3 */ + max8998,pmic-buck2-dvs-voltage = <1350000>, <1300000>; + + regulators { + ldo2_reg: LDO2 { + regulator-name = "VDD_ALIVE_1.1V"; + regulator-min-microvolt = <1100000>; + regulator-max-microvolt = <1100000>; + regulator-always-on; + }; + + buck1_reg: BUCK1 { + regulator-name = "VDD_ARM_1.2V"; + regulator-min-microvolt = <950000>; + regulator-max-microvolt = <1350000>; + regulator-always-on; + regulator-boot-on; + }; + }; + }; diff --git a/drivers/mfd/max8998.c b/drivers/mfd/max8998.c index e9bd352..d4a8753 100644 --- a/drivers/mfd/max8998.c +++ b/drivers/mfd/max8998.c @@ -20,12 +20,14 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include #include #include #include #include #include #include +#include #include #include #include @@ -128,6 +130,65 @@ int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask) } EXPORT_SYMBOL(max8998_update_reg); +#ifdef CONFIG_OF +static struct of_device_id max8998_dt_match[] = { + { .compatible = "maxim,max8998", .data = (void *)TYPE_MAX8998 }, + { .compatible = "national,lp3974", .data = (void *)TYPE_LP3974 }, + { .compatible = "ti,lp3974", .data = (void *)TYPE_LP3974 }, + {}, +}; +MODULE_DEVICE_TABLE(of, max8998_dt_match); + +/* + * Only the common platform data elements for max8998 are parsed here from the + * device tree. Other sub-modules of max8998 such as pmic, rtc and others have + * to parse their own platform data elements from device tree. + * + * The max8998 platform data structure is instantiated here and the drivers for + * the sub-modules need not instantiate another instance while parsing their + * platform data. + */ +static struct max8998_platform_data *max8998_i2c_parse_dt_pdata( + struct device *dev) +{ + struct max8998_platform_data *pd; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) { + dev_err(dev, "could not allocate memory for pdata\n"); + return ERR_PTR(-ENOMEM); + } + + pd->ono = irq_of_parse_and_map(dev->of_node, 1); + + /* + * ToDo: the 'wakeup' member in the platform data is more of a linux + * specfic information. Hence, there is no binding for that yet and + * not parsed here. + */ + + return pd; +} +#else +static struct max8998_platform_data *max8998_i2c_parse_dt_pdata( + struct device *dev) +{ + return 0; +} +#endif + +static inline int max8998_i2c_get_driver_data(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + if (i2c->dev.of_node) { + const struct of_device_id *match; + match = of_match_node(max8998_dt_match, i2c->dev.of_node); + return (int)match->data; + } + + return (int)id->driver_data; +} + static int max8998_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { @@ -139,11 +200,20 @@ static int max8998_i2c_probe(struct i2c_client *i2c, if (max8998 == NULL) return -ENOMEM; + if (i2c->dev.of_node) { + pdata = max8998_i2c_parse_dt_pdata(&i2c->dev); + if (IS_ERR(pdata)) { + ret = PTR_ERR(pdata); + goto err; + } + } + i2c_set_clientdata(i2c, max8998); max8998->dev = &i2c->dev; max8998->i2c = i2c; max8998->irq = i2c->irq; - max8998->type = id->driver_data; + max8998->type = max8998_i2c_get_driver_data(i2c, id); + max8998->pdata = pdata; if (pdata) { max8998->ono = pdata->ono; max8998->wakeup = pdata->wakeup; @@ -157,7 +227,7 @@ static int max8998_i2c_probe(struct i2c_client *i2c, pm_runtime_set_active(max8998->dev); - switch (id->driver_data) { + switch (max8998->type) { case TYPE_LP3974: ret = mfd_add_devices(max8998->dev, -1, lp3974_devs, ARRAY_SIZE(lp3974_devs), @@ -313,6 +383,7 @@ static struct i2c_driver max8998_i2c_driver = { .name = "max8998", .owner = THIS_MODULE, .pm = &max8998_pm, + .of_match_table = of_match_ptr(max8998_dt_match), }, .probe = max8998_i2c_probe, .remove = max8998_i2c_remove, diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c index 8c45b93..df37b3a 100644 --- a/drivers/regulator/max8998.c +++ b/drivers/regulator/max8998.c @@ -28,8 +28,10 @@ #include #include #include +#include #include #include +#include #include #include @@ -589,13 +591,13 @@ static struct regulator_desc regulators[] = { .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { - .name = "EN32KHz AP", + .name = "EN32KHz-AP", .id = MAX8998_EN32KHZ_AP, .ops = &max8998_others_ops, .type = REGULATOR_VOLTAGE, .owner = THIS_MODULE, }, { - .name = "EN32KHz CP", + .name = "EN32KHz-CP", .id = MAX8998_EN32KHZ_CP, .ops = &max8998_others_ops, .type = REGULATOR_VOLTAGE, @@ -621,10 +623,150 @@ static struct regulator_desc regulators[] = { } }; +#ifdef CONFIG_OF +static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev, + struct max8998_platform_data *pdata, + struct device_node *pmic_np) +{ + int gpio; + + gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 0); + if (!gpio_is_valid(gpio)) { + dev_err(iodev->dev, "invalid buck1 gpio[0]: %d\n", gpio); + return -EINVAL; + } + pdata->buck1_set1 = gpio; + + gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 1); + if (!gpio_is_valid(gpio)) { + dev_err(iodev->dev, "invalid buck1 gpio[1]: %d\n", gpio); + return -EINVAL; + } + pdata->buck1_set2 = gpio; + + gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck2-dvs-gpio", 0); + if (!gpio_is_valid(gpio)) { + dev_err(iodev->dev, "invalid buck 2 gpio: %d\n", gpio); + return -EINVAL; + } + pdata->buck2_set3 = gpio; + + return 0; +} + +static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev, + struct max8998_platform_data *pdata) +{ + struct device_node *pmic_np, *regulators_np, *reg_np; + struct max8998_regulator_data *rdata; + unsigned int i, ret; + + pmic_np = iodev->dev->of_node; + if (!pmic_np) { + dev_err(iodev->dev, "could not find pmic sub-node\n"); + return -ENODEV; + } + + regulators_np = of_find_node_by_name(pmic_np, "regulators"); + if (!regulators_np) { + dev_err(iodev->dev, "could not find regulators sub-node\n"); + return -EINVAL; + } + + /* count the number of regulators to be supported in pmic */ + pdata->num_regulators = 0; + for_each_child_of_node(regulators_np, reg_np) + pdata->num_regulators++; + + rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) * + pdata->num_regulators, GFP_KERNEL); + if (!rdata) { + dev_err(iodev->dev, "could not allocate memory for " + "regulator data\n"); + return -ENOMEM; + } + + pdata->regulators = rdata; + for_each_child_of_node(regulators_np, reg_np) { + for (i = 0; i < ARRAY_SIZE(regulators); i++) + if (!of_node_cmp(reg_np->name, regulators[i].name)) + break; + + if (i == ARRAY_SIZE(regulators)) { + dev_warn(iodev->dev, "don't know how to configure " + "regulator %s\n", reg_np->name); + --pdata->num_regulators; + continue; + } + + rdata->id = regulators[i].id; + rdata->initdata = of_get_regulator_init_data( + iodev->dev, reg_np); + rdata->reg_node = reg_np; + rdata++; + } + + ret = max8998_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); + if (ret) + return -EINVAL; + + if (of_find_property(pmic_np, "max8998,pmic-buck-voltage-lock", NULL)) + pdata->buck_voltage_lock = true; + + if (of_property_read_u32(pmic_np, + "max8998,pmic-buck1-default-dvs-idx", + &pdata->buck1_default_idx)) { + pdata->buck1_default_idx = 0; + } else { + if (pdata->buck1_default_idx >= 4) { + pdata->buck1_default_idx = 0; + dev_info(iodev->dev, "invalid value for " + "default dvs index, using 0 instead\n"); + } + } + + if (of_property_read_u32(pmic_np, + "max8998,pmic-buck2-default-dvs-idx", + &pdata->buck2_default_idx)) { + pdata->buck2_default_idx = 0; + } else { + if (pdata->buck2_default_idx >= 2) { + pdata->buck2_default_idx = 0; + dev_info(iodev->dev, "invalid value for " + "default dvs index, using 0 instead\n"); + } + } + + if (of_property_read_u32_array(pmic_np, + "max8998,pmic-buck1-dvs-voltage", + pdata->buck1_voltage, + ARRAY_SIZE(pdata->buck1_voltage))) { + dev_err(iodev->dev, "buck1 voltages not specified\n"); + return -EINVAL; + } + + if (of_property_read_u32_array(pmic_np, + "max8998,pmic-buck2-dvs-voltage", + pdata->buck2_voltage, + ARRAY_SIZE(pdata->buck2_voltage))) { + dev_err(iodev->dev, "buck2 voltages not specified\n"); + return -EINVAL; + } + + return 0; +} +#else +static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev, + struct max8998_platform_data *pdata) +{ + return 0; +} +#endif /* CONFIG_OF */ + static int max8998_pmic_probe(struct platform_device *pdev) { struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); - struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev); + struct max8998_platform_data *pdata = iodev->pdata; struct regulator_config config = { }; struct regulator_dev **rdev; struct max8998_data *max8998; @@ -637,6 +779,12 @@ static int max8998_pmic_probe(struct platform_device *pdev) return -ENODEV; } + if (iodev->dev->of_node) { + ret = max8998_pmic_dt_parse_pdata(iodev, pdata); + if (ret) + return ret; + } + max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data), GFP_KERNEL); if (!max8998) @@ -750,13 +898,15 @@ static int max8998_pmic_probe(struct platform_device *pdev) } config.dev = max8998->dev; + config.of_node = pdata->regulators[i].reg_node; config.init_data = pdata->regulators[i].initdata; config.driver_data = max8998; rdev[i] = regulator_register(®ulators[index], &config); if (IS_ERR(rdev[i])) { ret = PTR_ERR(rdev[i]); - dev_err(max8998->dev, "regulator init failed\n"); + dev_err(max8998->dev, "regulator %s init failed\n", + regulators[index].name); rdev[i] = NULL; goto err; } diff --git a/drivers/rtc/rtc-max8998.c b/drivers/rtc/rtc-max8998.c index f854983..66374ac 100644 --- a/drivers/rtc/rtc-max8998.c +++ b/drivers/rtc/rtc-max8998.c @@ -253,7 +253,7 @@ static const struct rtc_class_ops max8998_rtc_ops = { static int max8998_rtc_probe(struct platform_device *pdev) { struct max8998_dev *max8998 = dev_get_drvdata(pdev->dev.parent); - struct max8998_platform_data *pdata = dev_get_platdata(max8998->dev); + struct max8998_platform_data *pdata = max8998->pdata; struct max8998_rtc_info *info; int ret; diff --git a/include/linux/mfd/max8998-private.h b/include/linux/mfd/max8998-private.h index e81077a..f02676e 100644 --- a/include/linux/mfd/max8998-private.h +++ b/include/linux/mfd/max8998-private.h @@ -137,6 +137,7 @@ struct irq_domain; /** * struct max8998_dev - max8998 master device for sub-drivers * @dev: master device of the chip (can be used to access platform data) + * @pdata: platform data for the driver and subdrivers * @i2c: i2c client private data for regulator * @rtc: i2c client private data for rtc * @iolock: mutex for serializing io access @@ -150,6 +151,7 @@ struct irq_domain; */ struct max8998_dev { struct device *dev; + struct max8998_platform_data *pdata; struct i2c_client *i2c; struct i2c_client *rtc; struct mutex iolock; diff --git a/include/linux/mfd/max8998.h b/include/linux/mfd/max8998.h index e8b9ba7..bb4de8b 100644 --- a/include/linux/mfd/max8998.h +++ b/include/linux/mfd/max8998.h @@ -58,10 +58,12 @@ enum { * max8998_regulator_data - regulator data * @id: regulator id * @initdata: regulator init data (contraints, supplies, ...) + * @reg_node: DT node of regulator (unused on non-DT platforms) */ struct max8998_regulator_data { int id; struct regulator_init_data *initdata; + struct device_node *reg_node; }; /**