Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932132Ab2EUJwQ (ORCPT ); Mon, 21 May 2012 05:52:16 -0400 Received: from mailout4.samsung.com ([203.254.224.34]:14482 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757697Ab2EUJwM (ORCPT ); Mon, 21 May 2012 05:52:12 -0400 X-AuditID: cbfee61b-b7faf6d000001f49-73-4fba104518b8 From: Jonghwa Lee To: linux-kernel@vger.kernel.org Cc: Samuel Oritz , Mark Brown , Liam Gridwodd , Alessandro Zummo , Kyungmin Park , MyungJoo Ham , Chanwoo Choi , Jonghwa Lee , Chiwoong Byun Subject: [PATCH v4 3/3] rtc: MAX77686: Add Maxim 77686 rtc driver Date: Mon, 21 May 2012 18:51:47 +0900 Message-id: <1337593907-6615-4-git-send-email-jonghwa3.lee@samsung.com> X-Mailer: git-send-email 1.7.4.1 In-reply-to: <1337593907-6615-1-git-send-email-jonghwa3.lee@samsung.com> References: <1337593907-6615-1-git-send-email-jonghwa3.lee@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrMJMWRmVeSWpSXmKPExsVy+t9jQV03gV3+BmeXsVpc3jWHzYHR4/Mm uQDGKC6blNSczLLUIn27BK6MXV3fmAt+TGSsWHO2mbmB8VZZFyMnh4SAicTxS1tZIWwxiQv3 1rN1MXJxCAlMZ5TYd7ONEcJZySTxf/8DdpAqNgEdif/7boLZIgIKEpt7n7GCFDELfGaS2H5y HgtIQljAUWLuohdACQ4OFgFViQlvpUHCvALuEjuvbmCE2KYgseDeWzYQm1PAQ2JJ7z5mEFsI qGbX9WNMExh5FzAyrGIUTS1ILihOSs810itOzC0uzUvXS87P3cQI9voz6R2MqxosDjEKcDAq 8fAueLPTX4g1say4MvcQowQHs5II792HQCHelMTKqtSi/Pii0pzU4kOM0hwsSuK8T5bs8BcS SE8sSc1OTS1ILYLJMnFwSjUwRrh+WBN75+ke9bU5f9cpJz6+nZfpbtZwYPWxvnmHXNouVUwU eNTvqy35yuS20wL+qX7Wz6rs9c6cDi9y3vbxaepl+0RfbrPTb5QV3N/+Nf6zYrZIpebXM873 b59i3XdZQUfu9MWnmT+fXpph8rP/mU4h98U31c8O5F2bvHfz2qKVm+e7mPJfcVJiKc5INNRi LipOBAAvw5F39gEAAA== X-TM-AS-MML: No Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 18219 Lines: 711 Add driver for support max77686 rtc. MAX77686 rtc support smpl and wtsr mode. It has two alarm register, and can be used for waking system up. It sharing i2c bus, regmap supplies the way can get to the its register. Changes in patchset v3 - Use regmap API to access RTC register. Signed-off-by: Chiwoong Byun Signed-off-by: Jonghwa Lee Signed-off-by: Myunjoo Ham Signed-off-by: Kyungmin Park --- drivers/rtc/Kconfig | 10 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-max77686.c | 645 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 656 insertions(+), 0 deletions(-) create mode 100644 drivers/rtc/rtc-max77686.c diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 8c8377d..a6092a6 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -213,6 +213,16 @@ config RTC_DRV_MAX8998 This driver can also be built as a module. If so, the module will be called rtc-max8998. +config RTC_DRV_MAX77686 + tristate "Maxim MAX77686" + depends on MFD_MAX77686 + help + If you say yes here you will get support for the + RTC of Maxim MAX77686 PMIC. + + This driver can also be built as a module. If so, the module + will be called rtc-max77686. + config RTC_DRV_RS5C372 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A" help diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 727ae77..224b860 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -66,6 +66,7 @@ obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o obj-$(CONFIG_RTC_DRV_MAX8925) += rtc-max8925.o obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o +obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o obj-$(CONFIG_RTC_DRV_MPC5121) += rtc-mpc5121.o diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c new file mode 100644 index 0000000..63da55a --- /dev/null +++ b/drivers/rtc/rtc-max77686.c @@ -0,0 +1,645 @@ +/* + * RTC driver for Maxim MAX77686 + * + * Copyright (C) 2012 Samsung Electronics Co.Ltd + * + * based on rtc-max8997.c + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* RTC Control Register */ +#define BCD_EN_SHIFT 0 +#define BCD_EN_MASK (1 << BCD_EN_SHIFT) +#define MODEL24_SHIFT 1 +#define MODEL24_MASK (1 << MODEL24_SHIFT) +/* RTC Update Register1 */ +#define RTC_UDR_SHIFT 0 +#define RTC_UDR_MASK (1 << RTC_UDR_SHIFT) +#define RTC_RBUDR_SHIFT 4 +#define RTC_RBUDR_MASK (1 << RTC_RBUDR_SHIFT) +/* WTSR and SMPL Register */ +#define WTSRT_SHIFT 0 +#define SMPLT_SHIFT 2 +#define WTSR_EN_SHIFT 6 +#define SMPL_EN_SHIFT 7 +#define WTSRT_MASK (3 << WTSRT_SHIFT) +#define SMPLT_MASK (3 << SMPLT_SHIFT) +#define WTSR_EN_MASK (1 << WTSR_EN_SHIFT) +#define SMPL_EN_MASK (1 << SMPL_EN_SHIFT) +/* RTC Hour register */ +#define HOUR_PM_SHIFT 6 +#define HOUR_PM_MASK (1 << HOUR_PM_SHIFT) +/* RTC Alarm Enable */ +#define ALARM_ENABLE_SHIFT 7 +#define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT) + +#define MAX77686_RTC_UPDATE_DELAY 16 +#undef MAX77686_RTC_WTSR_SMPL + +enum { + RTC_SEC = 0, + RTC_MIN, + RTC_HOUR, + RTC_WEEKDAY, + RTC_MONTH, + RTC_YEAR, + RTC_DATE, + RTC_NR_TIME +}; + +struct max77686_rtc_info { + struct device *dev; + struct max77686_dev *max77686; + struct i2c_client *rtc; + struct rtc_device *rtc_dev; + struct mutex lock; + + struct regmap *regmap; + + int virq; + int rtc_24hr_mode; +}; + +enum MAX77686_RTC_OP { + MAX77686_RTC_WRITE, + MAX77686_RTC_READ, +}; + +static inline int max77686_rtc_calculate_wday(u8 shifted) +{ + int counter = -1; + while (shifted) { + shifted >>= 1; + counter++; + } + return counter; +} + +static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm, + int rtc_24hr_mode) +{ + tm->tm_sec = data[RTC_SEC] & 0x7f; + tm->tm_min = data[RTC_MIN] & 0x7f; + if (rtc_24hr_mode) + tm->tm_hour = data[RTC_HOUR] & 0x1f; + else { + tm->tm_hour = data[RTC_HOUR] & 0x0f; + if (data[RTC_HOUR] & HOUR_PM_MASK) + tm->tm_hour += 12; + } + + tm->tm_wday = max77686_rtc_calculate_wday(data[RTC_WEEKDAY] & 0x7f); + tm->tm_mday = data[RTC_DATE] & 0x1f; + tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; + tm->tm_year = (data[RTC_YEAR] & 0x7f) + 100; + tm->tm_yday = 0; + tm->tm_isdst = 0; +} + +static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data) +{ + data[RTC_SEC] = tm->tm_sec; + data[RTC_MIN] = tm->tm_min; + data[RTC_HOUR] = tm->tm_hour; + data[RTC_WEEKDAY] = 1 << tm->tm_wday; + data[RTC_DATE] = tm->tm_mday; + data[RTC_MONTH] = tm->tm_mon + 1; + data[RTC_YEAR] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0 ; + + if (tm->tm_year < 100) { + pr_warn("%s: MAX77686 RTC cannot handle the year %d." + "Assume it's 2000.\n", __func__, 1900 + tm->tm_year); + return -EINVAL; + } + return 0; +} + +static inline int max77686_rtc_update(struct max77686_rtc_info *info, + enum MAX77686_RTC_OP op) +{ + int ret; + unsigned int data; + + switch (op) { + case MAX77686_RTC_WRITE: + data = 1 << RTC_UDR_SHIFT; + break; + case MAX77686_RTC_READ: + data = 1 << RTC_RBUDR_SHIFT; + break; + } + + ret = regmap_update_bits(info->max77686->rtc_regmap, + MAX77686_RTC_UPDATE0, data, data); + if (ret < 0) + dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n", + __func__, ret, data); + else { + /* Minimum 16ms delay required before RTC update. */ + msleep(MAX77686_RTC_UPDATE_DELAY); + } + + return ret; +} + +static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct max77686_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + int ret; + + mutex_lock(&info->lock); + + ret = max77686_rtc_update(info, MAX77686_RTC_READ); + if (ret < 0) + goto out; + + ret = regmap_bulk_read(info->max77686->rtc_regmap, + MAX77686_RTC_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__, ret); + goto out; + } + + max77686_rtc_data_to_tm(data, tm, info->rtc_24hr_mode); + + ret = rtc_valid_tm(tm); + +out: + mutex_unlock(&info->lock); + return ret; +} + +static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct max77686_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + int ret; + + ret = max77686_rtc_tm_to_data(tm, data); + if (ret < 0) + return ret; + + mutex_lock(&info->lock); + + ret = regmap_bulk_write(info->max77686->rtc_regmap, + MAX77686_RTC_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__, + ret); + goto out; + } + + ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); + +out: + mutex_unlock(&info->lock); + return ret; +} + +static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct max77686_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + unsigned int val; + int i, ret; + + mutex_lock(&info->lock); + + ret = max77686_rtc_update(info, MAX77686_RTC_READ); + if (ret < 0) + goto out; + + ret = regmap_bulk_read(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n", + __func__, __LINE__, ret); + goto out; + } + + max77686_rtc_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); + + alrm->enabled = 0; + for (i = 0; i < RTC_NR_TIME; i++) { + if (data[i] & ALARM_ENABLE_MASK) { + alrm->enabled = 1; + break; + } + } + + alrm->pending = 0; + ret = regmap_read(info->max77686->regmap, MAX77686_REG_STATUS1, &val); + if (ret < 0) { + dev_err(info->dev, "%s:%d fail to read status1 reg(%d)\n", + __func__, __LINE__, ret); + goto out; + } + + if (val & (1 << 4)) /* RTCA1 */ + alrm->pending = 1; + +out: + mutex_unlock(&info->lock); + return 0; +} + +static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info) +{ + u8 data[RTC_NR_TIME]; + int ret, i; + struct rtc_time tm; + + if (!mutex_is_locked(&info->lock)) + dev_warn(info->dev, "%s: should have mutex locked\n", __func__); + + ret = max77686_rtc_update(info, MAX77686_RTC_READ); + if (ret < 0) + goto out; + + ret = regmap_bulk_read(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", + __func__, ret); + goto out; + } + + max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode); + + for (i = 0; i < RTC_NR_TIME; i++) + data[i] &= ~ALARM_ENABLE_MASK; + + ret = regmap_bulk_write(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", + __func__, ret); + goto out; + } + + ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); +out: + return ret; +} + +static int max77686_rtc_start_alarm(struct max77686_rtc_info *info) +{ + u8 data[RTC_NR_TIME]; + int ret; + struct rtc_time tm; + + if (!mutex_is_locked(&info->lock)) + dev_warn(info->dev, "%s: should have mutex locked\n", __func__); + + ret = max77686_rtc_update(info, MAX77686_RTC_READ); + if (ret < 0) + goto out; + + ret = regmap_bulk_read(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to read alarm reg(%d)\n", + __func__, ret); + goto out; + } + + max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode); + + data[RTC_SEC] |= (1 << ALARM_ENABLE_SHIFT); + data[RTC_MIN] |= (1 << ALARM_ENABLE_SHIFT); + data[RTC_HOUR] |= (1 << ALARM_ENABLE_SHIFT); + data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; + if (data[RTC_MONTH] & 0xf) + data[RTC_MONTH] |= (1 << ALARM_ENABLE_SHIFT); + if (data[RTC_YEAR] & 0x7f) + data[RTC_YEAR] |= (1 << ALARM_ENABLE_SHIFT); + if (data[RTC_DATE] & 0x1f) + data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT); + + ret = regmap_bulk_write(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", + __func__, ret); + goto out; + } + + ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); +out: + return ret; +} + +static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct max77686_rtc_info *info = dev_get_drvdata(dev); + u8 data[RTC_NR_TIME]; + int ret; + + ret = max77686_rtc_tm_to_data(&alrm->time, data); + if (ret < 0) + return ret; + + mutex_lock(&info->lock); + + ret = max77686_rtc_stop_alarm(info); + if (ret < 0) + goto out; + + ret = regmap_bulk_write(info->max77686->rtc_regmap, + MAX77686_ALARM1_SEC, data, RTC_NR_TIME); + + if (ret < 0) { + dev_err(info->dev, "%s: fail to write alarm reg(%d)\n", + __func__, ret); + goto out; + } + + ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); + if (ret < 0) + goto out; + + if (alrm->enabled) + ret = max77686_rtc_start_alarm(info); +out: + mutex_unlock(&info->lock); + return ret; +} + +static int max77686_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + struct max77686_rtc_info *info = dev_get_drvdata(dev); + int ret; + + mutex_lock(&info->lock); + if (enabled) + ret = max77686_rtc_start_alarm(info); + else + ret = max77686_rtc_stop_alarm(info); + mutex_unlock(&info->lock); + + return ret; +} + +static irqreturn_t max77686_rtc_alarm_irq(int irq, void *data) +{ + struct max77686_rtc_info *info = data; + + dev_info(info->dev, "%s:irq(%d)\n", __func__, irq); + + rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static const struct rtc_class_ops max77686_rtc_ops = { + .read_time = max77686_rtc_read_time, + .set_time = max77686_rtc_set_time, + .read_alarm = max77686_rtc_read_alarm, + .set_alarm = max77686_rtc_set_alarm, + .alarm_irq_enable = max77686_rtc_alarm_irq_enable, +}; + +#ifdef MAX77686_RTC_WTSR_SMPL +static void max77686_rtc_enable_wtsr(struct max77686_rtc_info *info, bool enable) +{ + int ret; + unsigned int val, mask; + + if (enable) + val = (1 << WTSR_EN_SHIFT) | (3 << WTSRT_SHIFT); + else + val = 0; + + mask = WTSR_EN_MASK | WTSRT_MASK; + + dev_info(info->dev, "%s: %s WTSR\n", __func__, + enable ? "enable" : "disable"); + + ret = regmap_update_bits(info->max77686->rtc_regmap, + MAX77686_WTSR_SMPL_CNTL, mask, val); + if (ret < 0) { + dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n", + __func__, ret); + return; + } + + max77686_rtc_update(info, MAX77686_RTC_WRITE); +} + +static void max77686_rtc_enable_smpl(struct max77686_rtc_info *info, bool enable) +{ + int ret; + unsigned int val, mask; + + if (enable) + val = (1 << SMPL_EN_SHIFT) | (0 << SMPLT_SHIFT); + else + val = 0; + + mask = SMPL_EN_MASK | SMPLT_MASK; + + dev_info(info->dev, "%s: %s SMPL\n", __func__, + enable ? "enable" : "disable"); + + ret = regmap_update_bits(info->max77686->rtc_regmap, + MAX77686_WTSR_SMPL_CNTL, mask, val); + if (ret < 0) { + dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n", + __func__, ret); + return; + } + + max77686_rtc_update(info, MAX77686_RTC_WRITE); + + val = 0; + regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val); + pr_info("%s: WTSR_SMPL(0x%02x)\n", __func__, val); +} +#endif /* MAX77686_RTC_WTSR_SMPL */ + +static int max77686_rtc_init_reg(struct max77686_rtc_info *info) +{ + u8 data[2]; + int ret; + + /* Set RTC control register : Binary mode, 24hour mdoe */ + data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + + info->rtc_24hr_mode = 1; + + ret = regmap_bulk_write(info->max77686->rtc_regmap, MAX77686_RTC_CONTROLM, data, 2); + if (ret < 0) { + dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", + __func__, ret); + return ret; + } + + ret = max77686_rtc_update(info, MAX77686_RTC_WRITE); + return ret; +} + +static struct regmap_config max77686_rtc_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int __devinit max77686_rtc_probe(struct platform_device *pdev) +{ + struct max77686_dev *max77686 = dev_get_drvdata(pdev->dev.parent); + struct max77686_rtc_info *info; + int ret, virq; + + printk(KERN_INFO "%s\n", __func__); + + info = kzalloc(sizeof(struct max77686_rtc_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + mutex_init(&info->lock); + info->dev = &pdev->dev; + info->max77686 = max77686; + info->rtc = max77686->rtc; + info->max77686->rtc_regmap = regmap_init_i2c(info->max77686->rtc, + &max77686_rtc_regmap_config); + if (IS_ERR(info->max77686->rtc_regmap)) { + ret = PTR_ERR(info->max77686->rtc_regmap); + dev_err(info->max77686->dev, "Failed to allocate register map: %d\n", + ret); + kfree(info); + return ret; + } + platform_set_drvdata(pdev, info); + + ret = max77686_rtc_init_reg(info); + + if (ret < 0) { + dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret); + goto err_rtc; + } + +#ifdef MAX77686_RTC_WTSR_SMPL + max77686_rtc_enable_wtsr(info, true); + max77686_rtc_enable_smpl(info, true); +#endif + + device_init_wakeup(&pdev->dev, 1); + + info->rtc_dev = rtc_device_register("max77686-rtc", &pdev->dev, + &max77686_rtc_ops, THIS_MODULE); + + if (IS_ERR(info->rtc_dev)) { + printk(KERN_INFO "%s: fail\n", __func__); + + ret = PTR_ERR(info->rtc_dev); + dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); + if (ret == 0) + ret = -EINVAL; + goto err_rtc; + } + virq = irq_create_mapping(max77686->irq_domain, MAX77686_RTCIRQ_RTCA1); + if (!virq) + goto err_rtc; + info->virq = virq; + + ret = request_threaded_irq(virq, NULL, max77686_rtc_alarm_irq, 0, + "rtc-alarm0", info); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", + info->virq, ret); + goto err_rtc; + } + + goto out; +err_rtc: + kfree(info); + return ret; +out: + return ret; +} + +static int __devexit max77686_rtc_remove(struct platform_device *pdev) +{ + struct max77686_rtc_info *info = platform_get_drvdata(pdev); + + if (info) { + free_irq(info->virq, info); + rtc_device_unregister(info->rtc_dev); + kfree(info); + } + + return 0; +} + +static void max77686_rtc_shutdown(struct platform_device *pdev) +{ +#ifdef MAX77686_RTC_WTSR_SMPL + struct max77686_rtc_info *info = platform_get_drvdata(pdev); + int i; + u8 val = 0; + + for (i = 0; i < 3; i++) { + max77686_rtc_enable_wtsr(info, false); + regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val); + pr_info("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val); + if (val & WTSR_EN_MASK) + pr_emerg("%s: fail to disable WTSR\n", __func__); + else { + pr_info("%s: success to disable WTSR\n", __func__); + break; + } + } + + /* Disable SMPL when power off */ + max77686_rtc_enable_smpl(info, false); +#endif /* MAX77686_RTC_WTSR_SMPL */ +} + +static const struct platform_device_id rtc_id[] = { + { "max77686-rtc", 0 }, + {}, +}; + +static struct platform_driver max77686_rtc_driver = { + .driver = { + .name = "max77686-rtc", + .owner = THIS_MODULE, + }, + .probe = max77686_rtc_probe, + .remove = __devexit_p(max77686_rtc_remove), + .shutdown = max77686_rtc_shutdown, + .id_table = rtc_id, +}; + +static int __init max77686_rtc_init(void) +{ + return platform_driver_register(&max77686_rtc_driver); +} +module_init(max77686_rtc_init); + +static void __exit max77686_rtc_exit(void) +{ + platform_driver_unregister(&max77686_rtc_driver); +} +module_exit(max77686_rtc_exit); + +MODULE_DESCRIPTION("Maxim MAX77686 RTC driver"); +MODULE_AUTHOR(""); +MODULE_LICENSE("GPL"); -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/