From patchwork Wed Nov 28 06:50:57 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonghwa Lee X-Patchwork-Id: 202375 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from mail-vb0-f56.google.com (mail-vb0-f56.google.com [209.85.212.56]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 571852C0094 for ; Wed, 28 Nov 2012 17:51:11 +1100 (EST) Received: by mail-vb0-f56.google.com with SMTP id s24sf8681943vbi.11 for ; Tue, 27 Nov 2012 22:51:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlegroups.com; s=20120806; h=mime-version:x-beenthere:received-spf:x-auditid:from:to:cc:subject :date:message-id:x-mailer:dlp-filter:x-mtr:x-brightmail-tracker :x-brightmail-tracker:x-cfilter-loop:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-google-group-id:list-post:list-help:list-archive:sender :list-subscribe:list-unsubscribe:content-type; bh=BVzvGtlvgxmYvCQ+OTGNM2prgot9PMJSHYyJW9pVEeg=; b=guX25CSlP+4dOATcwU84tuit3YbL+n4eA0+3nb6SxzvTT3H0a6a5NrBSWMJzdZwZPw QmWm5ytTxqlP5WMkouDcefWy5eGVyToGemockJBFGpXn5ZnzuSSYXc83PMGSrvU7y8r3 8d64Sif2C6eM4QXKBz7RyUoSJiAOrqNg9J+MD1FwlCdmVJRb9O3WUV3AoFhJbhoG3NEc CK6iwIR+v0HnjtRy0W2kZP3WjRFXLYs3eqvsMIrMi9HREcmOuLjnJQ7qMV1q/NJaPDvW W0FVDQkDjdIa9FZbbgN25Uty1PzfVjZnBf7LwIy4/8CmRPSAmcjpFNRffp4lTPmmqbv1 96Pw== Received: by 10.50.33.137 with SMTP id r9mr6755992igi.8.1354085467954; Tue, 27 Nov 2012 22:51:07 -0800 (PST) MIME-Version: 1.0 X-BeenThere: rtc-linux@googlegroups.com Received: by 10.50.170.97 with SMTP id al1ls4168314igc.28.canary; Tue, 27 Nov 2012 22:51:07 -0800 (PST) Received: by 10.68.202.68 with SMTP id kg4mr4408792pbc.3.1354085467297; Tue, 27 Nov 2012 22:51:07 -0800 (PST) Received: by 10.68.202.68 with SMTP id kg4mr4408791pbc.3.1354085467284; Tue, 27 Nov 2012 22:51:07 -0800 (PST) Received: from mailout4.samsung.com (mailout4.samsung.com. [203.254.224.34]) by gmr-mx.google.com with ESMTP id js4si4003131pbb.2.2012.11.27.22.51.06; Tue, 27 Nov 2012 22:51:07 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of jonghwa3.lee@samsung.com designates 203.254.224.34 as permitted sender) client-ip=203.254.224.34; Received: from epcpsbgm2.samsung.com (epcpsbgm2 [203.254.230.27]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0ME600ATSQWJ8VO0@mailout4.samsung.com> for rtc-linux@googlegroups.com; Wed, 28 Nov 2012 15:51:05 +0900 (KST) Received: from epcpsbgm2.samsung.com ( [203.254.230.41]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id 7D.85.12699.954B5B05; Wed, 28 Nov 2012 15:51:05 +0900 (KST) X-AuditID: cbfee61b-b7f616d00000319b-b4-50b5b4599cbc Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id DC.85.12699.954B5B05; Wed, 28 Nov 2012 15:51:05 +0900 (KST) Received: from localhost.localdomain ([10.90.51.58]) by mmp2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0ME600LTER13XR00@mmp2.samsung.com> for rtc-linux@googlegroups.com; Wed, 28 Nov 2012 15:51:05 +0900 (KST) From: Jonghwa Lee To: linux-kernel@vger.kernel.org Cc: Alessandro Zummo , rtc-linux@googlegroups.com, Abhilash Kesavan , Jonghwa Lee , Chiwoong Byun , Myugnjoo Ham , Kyungmin Park Subject: [rtc-linux] [RESEND PATCH] RTC: MAX77686: Add Maxim 77686 driver Date: Wed, 28 Nov 2012 15:50:57 +0900 Message-id: <1354085457-18460-1-git-send-email-jonghwa3.lee@samsung.com> X-Mailer: git-send-email 1.7.4.1 DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrOLMWRmVeSWpSXmKPExsVy+t8zTd3ILVsDDFa/U7HY39nB6MDosWfi SbYAxigum5TUnMyy1CJ9uwSujDfvV7MULJ/IWDG18z57A+Pcsi5GTg4JAROJfRves0LYYhIX 7q1n62Lk4hASWMYoMendCUaYou87DjFDJKYzSsxoeQ1VtZhJ4s+FNUwgVWwCOhL/991kB7FF BBQkNvc+YwUpYhaYzyTRP60PbIewgK3En8Z2ZhCbRUBVYvXDdSwgNq+Ah8SP/d/ZIdYpSCy4 95YNokZA4tvkQ0A1HEBxWYlNB8CukBDYwyZx4/g0qLslJQ6uuMEygVFwASPDKkbR1ILkguKk 9FwjveLE3OLSvHS95PzcTYyQ0JLewbiqweIQowAHoxIPr4Pj1gAh1sSy4srcQ4wSHMxKIrw8 bUAh3pTEyqrUovz4otKc1OJDjD5Al0xklhJNzgeGfV5JvKGxgbGhoaWhmamlqQEOYSVx3maP lAAhgfTEktTs1NSC1CKYcUwcnFINjOvPvtKu5rHavZLF/Y6BZpXDtmyWkz/NPnL0aG4scHl8 x0LL+dIrtYnn5m1/c+2182qLLOGidr//6w1P7JXjTNR3NZwflqm1pnFB9dFZ2zrd1rBe03VS Xl00fYkZvyiLgPbE6StTnG9+FXmh1zLPK2byrJeM+j6bamycHx6ZXHvcs1rm8onm20osxRmJ hlrMRcWJAPTQE9JaAgAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrGLMWRmVeSWpSXmKPExsVy+t9jQd3ILVsDDL6/lrDY39nB6MDosWfi SbYAxqgGRpuM1MSU1CKF1Lzk/JTMvHRbJe/geOd4UzMDQ11DSwtzJYW8xNxUWyUXnwBdt8wc oLFKCmWJOaVAoYDE4mIlfTtME0JD3HQtYBojdH1DguB6jAzQQMI6xow371ezFCyfyFgxtfM+ ewPj3LIuRk4OCQETie87DjFD2GISF+6tZ+ti5OIQEpjOKDGj5TWUs5hJ4s+FNUwgVWwCOhL/ 991kB7FFBBQkNvc+YwUpYhaYzyTRP62PFSQhLGAr8aexHWwsi4CqxOqH61hAbF4BD4kf+7+z Q6xTkFhw7y3bBEbuBYwMqxhFUwuSC4qT0nON9IoTc4tL89L1kvNzNzGCA/eZ9A7GVQ0WhxgF OBiVeHgdHLcGCLEmlhVX5h5ilOBgVhLh5WkDCvGmJFZWpRblxxeV5qQWH2L0Ado+kVlKNDkf GFV5JfGGxiZmRpZGZsYm5sbGOISVxHmbPVIChATSE0tSs1NTC1KLYMYxcXBKNTBmy7UzxWwL kHDZGFY6U2rlZ+veGce1zzIaLbrHtnQNQ6m9eGXr191sp8/x3udcsPHhiofZKq8vf9B4tefD t7deP9vte/IlN0cre6bt09vf5d3/sKIs6cq2M/IBjQ+UGgPDbisc/5hxbJoeX9Xjwr3WRkWH vN/m1dw8s+lLYO8BX99m97ltDvJKLMUZiYZazEXFiQC1SC1fiQIAAA== X-CFilter-Loop: Reflected X-Original-Sender: jonghwa3.lee@samsung.com X-Original-Authentication-Results: gmr-mx.google.com; spf=pass (google.com: best guess record for domain of jonghwa3.lee@samsung.com designates 203.254.224.34 as permitted sender) smtp.mail=jonghwa3.lee@samsung.com Reply-To: rtc-linux@googlegroups.com Precedence: list Mailing-list: list rtc-linux@googlegroups.com; contact rtc-linux+owners@googlegroups.com List-ID: X-Google-Group-Id: 712029733259 List-Post: , List-Help: , List-Archive: Sender: rtc-linux@googlegroups.com List-Subscribe: , List-Unsubscribe: , Add driver for support max77686 rtc. MAX77686 rtc support smpl and wtsr mode. It has two alarm register which can be used for alarming to wake system up. This drvier uses regmap to access its register. Signed-off-by: Chiwoong Byun Signed-off-by: Jonghwa Lee Signed-off-by: Myugnjoo 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 19c03ab..4848563 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -233,6 +233,16 @@ 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 56297f0..3cc94c9 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -69,6 +69,7 @@ obj-$(CONFIG_RTC_DRV_MAX8907) += rtc-max8907.o obj-$(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");