3aa78e0cb5
But we also have: - Support for the TPS659038 PMIC from the palmas driver. - Intel's Coleto Creek and Avoton SoCs support from the lpc_ich driver. - RTL8411B support from the rtsx driver. - More DT support for the Arizona, max8998, twl4030-power and the ti_am335x_tsadc drivers. - The SSBI driver move under MFD. - A conversion to the devm_* API for most of the MFD drivers. - The twl4030-power got split from twl-core into its own module. - A major ti_am335x_adc cleanup, leading to a proper DT support. - Our regular arizona and wm* updates and cleanups from the Wolfson folks. - A better error handling and initialization, and a regulator subdevice addition for the 88pm80x driver. - A bulk platform_set_drvdata() call removal that's no longer need since commit0998d063. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABAgAGBQJR2zCaAAoJEIqAPN1PVmxK29EP/ieZf7Z7z7bg/0lEOvtOzACy WoCdSGFu5XcHOnlv0Fl1Rr/1AJFQoh4KugkGnVyrlztYVOFymj5VDdd8B43cxMLt 7ymK/3crIH7uJuOoeDoDr3glLuo0TGB9f5Kv4ITdVD3/+AuqY4VIAisEDb0aWghW +v0I3fYeGdwRv+IqO5wacvddSoLa4rmOhnpbVMB2O1Y/LCm/yHI6tAFx1+AfH7y8 zMHbGFc+gHg1xupJBCnRel0v8J+KNc02G/B1zNom/avL8b/mNXNI8JFxs3bMA0r8 NpTHJ49OVPbhBQTA4U+BPoG4nzOiAOj0czf9dkGa5cyR8t4C9mmK+s8QHwepzrSG qbhCgTqp4bomB1m0RAO+z4F6BHTpmoChpho2btrwN9ZmhMHQeTWnGjjhEwZngpBq F22DC6k5ipV0k4962ZHfZ76v2Vot1gfd6zQ5r+2oHMMfWaKgS4L5efP2/wsU9H58 BxMm84C7OWbgcTRmNn9jl4L9phBD31wvNANfUeMhLMyshnwPK5ZuUdX/+K2rq6h9 w26Hg62HtKZFv/TEsCBQqpB6zSZa4u/KZzvwEahllQSQGKxIHaNYGtLGzJj9sCM+ baT/82DFKuEvKfJpUKSBMznImp4WNGEz+8s2w4m/Ssuf30GN2GHjM9Q4gcHJu2mk 7fTrsSHWYN+EHVzh1Zb8 =RqMp -----END PGP SIGNATURE----- Merge tag 'mfd-3.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-next Pull MFD update from Samuel Ortiz: "For the 3.11 merge we only have one new MFD driver for the Kontron PLD. But we also have: - Support for the TPS659038 PMIC from the palmas driver. - Intel's Coleto Creek and Avoton SoCs support from the lpc_ich driver. - RTL8411B support from the rtsx driver. - More DT support for the Arizona, max8998, twl4030-power and the ti_am335x_tsadc drivers. - The SSBI driver move under MFD. - A conversion to the devm_* API for most of the MFD drivers. - The twl4030-power got split from twl-core into its own module. - A major ti_am335x_adc cleanup, leading to a proper DT support. - Our regular arizona and wm* updates and cleanups from the Wolfson folks. - A better error handling and initialization, and a regulator subdevice addition for the 88pm80x driver. - A bulk platform_set_drvdata() call removal that's no longer need since commit0998d06310("device-core: Ensure drvdata = NULL when no driver is bound") * tag 'mfd-3.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-next: (102 commits) mfd: sec: Provide max_register to regmap mfd: wm8994: Remove duplicate check for active JACKDET MAINTAINERS: Add include directory to MFD file patterns mfd: sec: Remove fields not used since regmap conversion watchdog: Kontron PLD watchdog timer driver mfd: max8998: Add support for Device Tree regulator: max8998: Use arrays for specifying voltages in platform data mfd: max8998: Add irq domain support regulator: palmas: Add TPS659038 support mfd: Kontron PLD mfd driver mfd: palmas: Add TPS659038 PMIC support mfd: palmas: Add SMPS10_BOOST feature mfd: palmas: Check if irq is valid mfd: lpc_ich: iTCO_wdt patch for Intel Coleto Creek DeviceIDs mfd: twl-core: Change TWL6025 references to TWL6032 mfd: davinci_voicecodec: Fix build breakage mfd: vexpress: Make the driver optional for arm and arm64 mfd: htc-egpio: Use devm_ioremap_nocache() instead of ioremap_nocache() mfd: davinci_voicecodec: Convert to use devm_* APIs mfd: twl4030-power: Fix relocking on error ...
327 lines
7.8 KiB
C
327 lines
7.8 KiB
C
/*
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* RTC driver for Maxim MAX8998
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*
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* Copyright (C) 2010 Samsung Electronics Co.Ltd
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* Author: Minkyu Kang <mk7.kang@samsung.com>
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/bcd.h>
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#include <linux/irqdomain.h>
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#include <linux/rtc.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/max8998.h>
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#include <linux/mfd/max8998-private.h>
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#include <linux/delay.h>
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#define MAX8998_RTC_SEC 0x00
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#define MAX8998_RTC_MIN 0x01
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#define MAX8998_RTC_HOUR 0x02
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#define MAX8998_RTC_WEEKDAY 0x03
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#define MAX8998_RTC_DATE 0x04
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#define MAX8998_RTC_MONTH 0x05
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#define MAX8998_RTC_YEAR1 0x06
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#define MAX8998_RTC_YEAR2 0x07
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#define MAX8998_ALARM0_SEC 0x08
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#define MAX8998_ALARM0_MIN 0x09
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#define MAX8998_ALARM0_HOUR 0x0a
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#define MAX8998_ALARM0_WEEKDAY 0x0b
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#define MAX8998_ALARM0_DATE 0x0c
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#define MAX8998_ALARM0_MONTH 0x0d
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#define MAX8998_ALARM0_YEAR1 0x0e
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#define MAX8998_ALARM0_YEAR2 0x0f
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#define MAX8998_ALARM1_SEC 0x10
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#define MAX8998_ALARM1_MIN 0x11
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#define MAX8998_ALARM1_HOUR 0x12
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#define MAX8998_ALARM1_WEEKDAY 0x13
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#define MAX8998_ALARM1_DATE 0x14
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#define MAX8998_ALARM1_MONTH 0x15
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#define MAX8998_ALARM1_YEAR1 0x16
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#define MAX8998_ALARM1_YEAR2 0x17
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#define MAX8998_ALARM0_CONF 0x18
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#define MAX8998_ALARM1_CONF 0x19
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#define MAX8998_RTC_STATUS 0x1a
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#define MAX8998_WTSR_SMPL_CNTL 0x1b
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#define MAX8998_TEST 0x1f
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#define HOUR_12 (1 << 7)
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#define HOUR_PM (1 << 5)
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#define ALARM0_STATUS (1 << 1)
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#define ALARM1_STATUS (1 << 2)
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enum {
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RTC_SEC = 0,
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RTC_MIN,
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RTC_HOUR,
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RTC_WEEKDAY,
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RTC_DATE,
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RTC_MONTH,
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RTC_YEAR1,
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RTC_YEAR2,
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};
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struct max8998_rtc_info {
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struct device *dev;
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struct max8998_dev *max8998;
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struct i2c_client *rtc;
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struct rtc_device *rtc_dev;
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int irq;
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bool lp3974_bug_workaround;
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};
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static void max8998_data_to_tm(u8 *data, struct rtc_time *tm)
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{
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tm->tm_sec = bcd2bin(data[RTC_SEC]);
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tm->tm_min = bcd2bin(data[RTC_MIN]);
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if (data[RTC_HOUR] & HOUR_12) {
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tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f);
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if (data[RTC_HOUR] & HOUR_PM)
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tm->tm_hour += 12;
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} else
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tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f);
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tm->tm_wday = data[RTC_WEEKDAY] & 0x07;
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tm->tm_mday = bcd2bin(data[RTC_DATE]);
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tm->tm_mon = bcd2bin(data[RTC_MONTH]);
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tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100;
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tm->tm_year -= 1900;
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}
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static void max8998_tm_to_data(struct rtc_time *tm, u8 *data)
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{
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data[RTC_SEC] = bin2bcd(tm->tm_sec);
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data[RTC_MIN] = bin2bcd(tm->tm_min);
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data[RTC_HOUR] = bin2bcd(tm->tm_hour);
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data[RTC_WEEKDAY] = tm->tm_wday;
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data[RTC_DATE] = bin2bcd(tm->tm_mday);
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data[RTC_MONTH] = bin2bcd(tm->tm_mon);
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data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100);
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data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100);
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}
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static int max8998_rtc_read_time(struct device *dev, struct rtc_time *tm)
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{
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struct max8998_rtc_info *info = dev_get_drvdata(dev);
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u8 data[8];
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int ret;
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ret = max8998_bulk_read(info->rtc, MAX8998_RTC_SEC, 8, data);
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if (ret < 0)
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return ret;
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max8998_data_to_tm(data, tm);
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return rtc_valid_tm(tm);
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}
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static int max8998_rtc_set_time(struct device *dev, struct rtc_time *tm)
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{
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struct max8998_rtc_info *info = dev_get_drvdata(dev);
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u8 data[8];
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int ret;
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max8998_tm_to_data(tm, data);
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ret = max8998_bulk_write(info->rtc, MAX8998_RTC_SEC, 8, data);
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if (info->lp3974_bug_workaround)
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msleep(2000);
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return ret;
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}
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static int max8998_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
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{
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struct max8998_rtc_info *info = dev_get_drvdata(dev);
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u8 data[8];
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u8 val;
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int ret;
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ret = max8998_bulk_read(info->rtc, MAX8998_ALARM0_SEC, 8, data);
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if (ret < 0)
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return ret;
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max8998_data_to_tm(data, &alrm->time);
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ret = max8998_read_reg(info->rtc, MAX8998_ALARM0_CONF, &val);
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if (ret < 0)
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return ret;
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alrm->enabled = !!val;
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ret = max8998_read_reg(info->rtc, MAX8998_RTC_STATUS, &val);
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if (ret < 0)
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return ret;
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if (val & ALARM0_STATUS)
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alrm->pending = 1;
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else
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alrm->pending = 0;
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return 0;
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}
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static int max8998_rtc_stop_alarm(struct max8998_rtc_info *info)
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{
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int ret = max8998_write_reg(info->rtc, MAX8998_ALARM0_CONF, 0);
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if (info->lp3974_bug_workaround)
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msleep(2000);
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return ret;
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}
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static int max8998_rtc_start_alarm(struct max8998_rtc_info *info)
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{
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int ret;
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u8 alarm0_conf = 0x77;
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/* LP3974 with delay bug chips has rtc alarm bugs with "MONTH" field */
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if (info->lp3974_bug_workaround)
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alarm0_conf = 0x57;
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ret = max8998_write_reg(info->rtc, MAX8998_ALARM0_CONF, alarm0_conf);
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if (info->lp3974_bug_workaround)
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msleep(2000);
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return ret;
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}
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static int max8998_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
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{
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struct max8998_rtc_info *info = dev_get_drvdata(dev);
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u8 data[8];
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int ret;
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max8998_tm_to_data(&alrm->time, data);
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ret = max8998_rtc_stop_alarm(info);
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if (ret < 0)
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return ret;
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ret = max8998_bulk_write(info->rtc, MAX8998_ALARM0_SEC, 8, data);
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if (ret < 0)
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return ret;
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if (info->lp3974_bug_workaround)
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msleep(2000);
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if (alrm->enabled)
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ret = max8998_rtc_start_alarm(info);
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return ret;
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}
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static int max8998_rtc_alarm_irq_enable(struct device *dev,
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unsigned int enabled)
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{
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struct max8998_rtc_info *info = dev_get_drvdata(dev);
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if (enabled)
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return max8998_rtc_start_alarm(info);
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else
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return max8998_rtc_stop_alarm(info);
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}
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static irqreturn_t max8998_rtc_alarm_irq(int irq, void *data)
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{
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struct max8998_rtc_info *info = data;
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rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
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return IRQ_HANDLED;
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}
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static const struct rtc_class_ops max8998_rtc_ops = {
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.read_time = max8998_rtc_read_time,
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.set_time = max8998_rtc_set_time,
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.read_alarm = max8998_rtc_read_alarm,
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.set_alarm = max8998_rtc_set_alarm,
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.alarm_irq_enable = max8998_rtc_alarm_irq_enable,
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};
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static int max8998_rtc_probe(struct platform_device *pdev)
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{
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struct max8998_dev *max8998 = dev_get_drvdata(pdev->dev.parent);
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struct max8998_platform_data *pdata = max8998->pdata;
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struct max8998_rtc_info *info;
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int ret;
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info = devm_kzalloc(&pdev->dev, sizeof(struct max8998_rtc_info),
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GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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info->dev = &pdev->dev;
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info->max8998 = max8998;
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info->rtc = max8998->rtc;
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platform_set_drvdata(pdev, info);
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info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8998-rtc",
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&max8998_rtc_ops, THIS_MODULE);
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if (IS_ERR(info->rtc_dev)) {
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ret = PTR_ERR(info->rtc_dev);
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dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
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return ret;
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}
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if (!max8998->irq_domain)
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goto no_irq;
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info->irq = irq_create_mapping(max8998->irq_domain, MAX8998_IRQ_ALARM0);
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if (!info->irq) {
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dev_warn(&pdev->dev, "Failed to map alarm IRQ\n");
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goto no_irq;
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}
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ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
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max8998_rtc_alarm_irq, 0, "rtc-alarm0", info);
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if (ret < 0)
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dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
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info->irq, ret);
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no_irq:
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dev_info(&pdev->dev, "RTC CHIP NAME: %s\n", pdev->id_entry->name);
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if (pdata && pdata->rtc_delay) {
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info->lp3974_bug_workaround = true;
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dev_warn(&pdev->dev, "LP3974 with RTC REGERR option."
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" RTC updates will be extremely slow.\n");
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}
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return 0;
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}
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static const struct platform_device_id max8998_rtc_id[] = {
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{ "max8998-rtc", TYPE_MAX8998 },
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{ "lp3974-rtc", TYPE_LP3974 },
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{ }
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};
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static struct platform_driver max8998_rtc_driver = {
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.driver = {
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.name = "max8998-rtc",
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.owner = THIS_MODULE,
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},
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.probe = max8998_rtc_probe,
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.id_table = max8998_rtc_id,
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};
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module_platform_driver(max8998_rtc_driver);
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MODULE_AUTHOR("Minkyu Kang <mk7.kang@samsung.com>");
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MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
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MODULE_DESCRIPTION("Maxim MAX8998 RTC driver");
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MODULE_LICENSE("GPL");
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