cregit-Linux how code gets into the kernel

Release 4.14 drivers/rtc/rtc-88pm80x.c

Directory: drivers/rtc
/*
 * Real Time Clock driver for Marvell 88PM80x PMIC
 *
 * Copyright (c) 2012 Marvell International Ltd.
 *  Wenzeng Chen<wzch@marvell.com>
 *  Qiao Zhou <zhouqiao@marvell.com>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License. See the file "COPYING" in the main directory of this
 * archive for more details.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/mfd/core.h>
#include <linux/mfd/88pm80x.h>
#include <linux/rtc.h>


#define PM800_RTC_COUNTER1		(0xD1)

#define PM800_RTC_COUNTER2		(0xD2)

#define PM800_RTC_COUNTER3		(0xD3)

#define PM800_RTC_COUNTER4		(0xD4)

#define PM800_RTC_EXPIRE1_1		(0xD5)

#define PM800_RTC_EXPIRE1_2		(0xD6)

#define PM800_RTC_EXPIRE1_3		(0xD7)

#define PM800_RTC_EXPIRE1_4		(0xD8)

#define PM800_RTC_TRIM1			(0xD9)

#define PM800_RTC_TRIM2			(0xDA)

#define PM800_RTC_TRIM3			(0xDB)

#define PM800_RTC_TRIM4			(0xDC)

#define PM800_RTC_EXPIRE2_1		(0xDD)

#define PM800_RTC_EXPIRE2_2		(0xDE)

#define PM800_RTC_EXPIRE2_3		(0xDF)

#define PM800_RTC_EXPIRE2_4		(0xE0)


#define PM800_POWER_DOWN_LOG1	(0xE5)

#define PM800_POWER_DOWN_LOG2	(0xE6)


struct pm80x_rtc_info {
	
struct pm80x_chip *chip;
	
struct regmap *map;
	
struct rtc_device *rtc_dev;
	
struct device *dev;
	
struct delayed_work calib_work;

	
int irq;
	
int vrtc;
};


static irqreturn_t rtc_update_handler(int irq, void *data) { struct pm80x_rtc_info *info = (struct pm80x_rtc_info *)data; int mask; mask = PM800_ALARM | PM800_ALARM_WAKEUP; regmap_update_bits(info->map, PM800_RTC_CONTROL, mask | PM800_ALARM1_EN, mask); rtc_update_irq(info->rtc_dev, 1, RTC_AF); return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou63100.00%1100.00%
Total63100.00%1100.00%


static int pm80x_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct pm80x_rtc_info *info = dev_get_drvdata(dev); if (enabled) regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_ALARM1_EN, PM800_ALARM1_EN); else regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_ALARM1_EN, 0); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou59100.00%1100.00%
Total59100.00%1100.00%

/* * Calculate the next alarm time given the requested alarm time mask * and the current time. */
static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, struct rtc_time *alrm) { unsigned long next_time; unsigned long now_time; next->tm_year = now->tm_year; next->tm_mon = now->tm_mon; next->tm_mday = now->tm_mday; next->tm_hour = alrm->tm_hour; next->tm_min = alrm->tm_min; next->tm_sec = alrm->tm_sec; rtc_tm_to_time(now, &now_time); rtc_tm_to_time(next, &next_time); if (next_time < now_time) { /* Advance one day */ next_time += 60 * 60 * 24; rtc_time_to_tm(next_time, next); } }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou117100.00%1100.00%
Total117100.00%1100.00%


static int pm80x_rtc_read_time(struct device *dev, struct rtc_time *tm) { struct pm80x_rtc_info *info = dev_get_drvdata(dev); unsigned char buf[4]; unsigned long ticks, base, data; regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4); base = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]); /* load 32-bit read-only counter */ regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4); data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; ticks = base + data; dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", base, data, ticks); rtc_time_to_tm(ticks, tm); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou196100.00%1100.00%
Total196100.00%1100.00%


static int pm80x_rtc_set_time(struct device *dev, struct rtc_time *tm) { struct pm80x_rtc_info *info = dev_get_drvdata(dev); unsigned char buf[4]; unsigned long ticks, base, data; if ((tm->tm_year < 70) || (tm->tm_year > 138)) { dev_dbg(info->dev, "Set time %d out of range. Please set time between 1970 to 2038.\n", 1900 + tm->tm_year); return -EINVAL; } rtc_tm_to_time(tm, &ticks); /* load 32-bit read-only counter */ regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4); data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; base = ticks - data; dev_dbg(info->dev, "set base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", base, data, ticks); buf[0] = base & 0xFF; buf[1] = (base >> 8) & 0xFF; buf[2] = (base >> 16) & 0xFF; buf[3] = (base >> 24) & 0xFF; regmap_raw_write(info->map, PM800_RTC_EXPIRE2_1, buf, 4); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou221100.00%1100.00%
Total221100.00%1100.00%


static int pm80x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct pm80x_rtc_info *info = dev_get_drvdata(dev); unsigned char buf[4]; unsigned long ticks, base, data; int ret; regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4); base = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]); regmap_raw_read(info->map, PM800_RTC_EXPIRE1_1, buf, 4); data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; ticks = base + data; dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", base, data, ticks); rtc_time_to_tm(ticks, &alrm->time); regmap_read(info->map, PM800_RTC_CONTROL, &ret); alrm->enabled = (ret & PM800_ALARM1_EN) ? 1 : 0; alrm->pending = (ret & (PM800_ALARM | PM800_ALARM_WAKEUP)) ? 1 : 0; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou245100.00%1100.00%
Total245100.00%1100.00%


static int pm80x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct pm80x_rtc_info *info = dev_get_drvdata(dev); struct rtc_time now_tm, alarm_tm; unsigned long ticks, base, data; unsigned char buf[4]; int mask; regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_ALARM1_EN, 0); regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4); base = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]); /* load 32-bit read-only counter */ regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4); data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; ticks = base + data; dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n", base, data, ticks); rtc_time_to_tm(ticks, &now_tm); dev_dbg(info->dev, "%s, now time : %lu\n", __func__, ticks); rtc_next_alarm_time(&alarm_tm, &now_tm, &alrm->time); /* get new ticks for alarm in 24 hours */ rtc_tm_to_time(&alarm_tm, &ticks); dev_dbg(info->dev, "%s, alarm time: %lu\n", __func__, ticks); data = ticks - base; buf[0] = data & 0xff; buf[1] = (data >> 8) & 0xff; buf[2] = (data >> 16) & 0xff; buf[3] = (data >> 24) & 0xff; regmap_raw_write(info->map, PM800_RTC_EXPIRE1_1, buf, 4); if (alrm->enabled) { mask = PM800_ALARM | PM800_ALARM_WAKEUP | PM800_ALARM1_EN; regmap_update_bits(info->map, PM800_RTC_CONTROL, mask, mask); } else { mask = PM800_ALARM | PM800_ALARM_WAKEUP | PM800_ALARM1_EN; regmap_update_bits(info->map, PM800_RTC_CONTROL, mask, PM800_ALARM | PM800_ALARM_WAKEUP); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou391100.00%1100.00%
Total391100.00%1100.00%

static const struct rtc_class_ops pm80x_rtc_ops = { .read_time = pm80x_rtc_read_time, .set_time = pm80x_rtc_set_time, .read_alarm = pm80x_rtc_read_alarm, .set_alarm = pm80x_rtc_set_alarm, .alarm_irq_enable = pm80x_rtc_alarm_irq_enable, }; #ifdef CONFIG_PM_SLEEP
static int pm80x_rtc_suspend(struct device *dev) { return pm80x_dev_suspend(dev); }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou17100.00%1100.00%
Total17100.00%1100.00%


static int pm80x_rtc_resume(struct device *dev) { return pm80x_dev_resume(dev); }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou17100.00%1100.00%
Total17100.00%1100.00%

#endif static SIMPLE_DEV_PM_OPS(pm80x_rtc_pm_ops, pm80x_rtc_suspend, pm80x_rtc_resume);
static int pm80x_rtc_probe(struct platform_device *pdev) { struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent); struct pm80x_rtc_pdata *pdata = dev_get_platdata(&pdev->dev); struct pm80x_rtc_info *info; struct device_node *node = pdev->dev.of_node; struct rtc_time tm; unsigned long ticks = 0; int ret; if (!pdata && !node) { dev_err(&pdev->dev, "pm80x-rtc requires platform data or of_node\n"); return -EINVAL; } if (!pdata) { pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) { dev_err(&pdev->dev, "failed to allocate memory\n"); return -ENOMEM; } } info = devm_kzalloc(&pdev->dev, sizeof(struct pm80x_rtc_info), GFP_KERNEL); if (!info) return -ENOMEM; info->irq = platform_get_irq(pdev, 0); if (info->irq < 0) { dev_err(&pdev->dev, "No IRQ resource!\n"); ret = -EINVAL; goto out; } info->chip = chip; info->map = chip->regmap; if (!info->map) { dev_err(&pdev->dev, "no regmap!\n"); ret = -EINVAL; goto out; } info->dev = &pdev->dev; dev_set_drvdata(&pdev->dev, info); ret = pm80x_request_irq(chip, info->irq, rtc_update_handler, IRQF_ONESHOT, "rtc", info); if (ret < 0) { dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", info->irq, ret); goto out; } ret = pm80x_rtc_read_time(&pdev->dev, &tm); if (ret < 0) { dev_err(&pdev->dev, "Failed to read initial time.\n"); goto out_rtc; } if ((tm.tm_year < 70) || (tm.tm_year > 138)) { tm.tm_year = 70; tm.tm_mon = 0; tm.tm_mday = 1; tm.tm_hour = 0; tm.tm_min = 0; tm.tm_sec = 0; ret = pm80x_rtc_set_time(&pdev->dev, &tm); if (ret < 0) { dev_err(&pdev->dev, "Failed to set initial time.\n"); goto out_rtc; } } rtc_tm_to_time(&tm, &ticks); info->rtc_dev = devm_rtc_device_register(&pdev->dev, "88pm80x-rtc", &pm80x_rtc_ops, THIS_MODULE); if (IS_ERR(info->rtc_dev)) { ret = PTR_ERR(info->rtc_dev); dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); goto out_rtc; } /* * enable internal XO instead of internal 3.25MHz clock since it can * free running in PMIC power-down state. */ regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_RTC1_USE_XO, PM800_RTC1_USE_XO); /* remember whether this power up is caused by PMIC RTC or not */ info->rtc_dev->dev.platform_data = &pdata->rtc_wakeup; device_init_wakeup(&pdev->dev, 1); return 0; out_rtc: pm80x_free_irq(chip, info->irq, info); out: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou46984.66%120.00%
Vaibhav Hiremath6311.37%120.00%
Jingoo Han132.35%240.00%
Devendra Naga91.62%120.00%
Total554100.00%5100.00%


static int pm80x_rtc_remove(struct platform_device *pdev) { struct pm80x_rtc_info *info = platform_get_drvdata(pdev); pm80x_free_irq(info->chip, info->irq, info); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou37100.00%1100.00%
Total37100.00%1100.00%

static struct platform_driver pm80x_rtc_driver = { .driver = { .name = "88pm80x-rtc", .pm = &pm80x_rtc_pm_ops, }, .probe = pm80x_rtc_probe, .remove = pm80x_rtc_remove, }; module_platform_driver(pm80x_rtc_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Marvell 88PM80x RTC driver"); MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>"); MODULE_ALIAS("platform:88pm80x-rtc");

Overall Contributors

PersonTokensPropCommitsCommitProp
Qiao Zhou206796.01%116.67%
Vaibhav Hiremath632.93%116.67%
Jingoo Han140.65%350.00%
Devendra Naga90.42%116.67%
Total2153100.00%6100.00%
Directory: drivers/rtc
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.