diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/rtc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/rtc/rtc-da9055.c | 2 | ||||
| -rw-r--r-- | drivers/rtc/rtc-tegra.c | 7 | ||||
| -rw-r--r-- | drivers/rtc/rtc-tps6586x.c | 356 | ||||
| -rw-r--r-- | drivers/rtc/rtc-vt8500.c | 11 |
6 files changed, 379 insertions, 6 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index d0cea02b5df..923a9da9c82 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -352,6 +352,14 @@ config RTC_DRV_TWL4030 This driver can also be built as a module. If so, the module will be called rtc-twl. +config RTC_DRV_TPS6586X + tristate "TI TPS6586X RTC driver" + depends on MFD_TPS6586X + help + TI Power Managment IC TPS6586X supports RTC functionality + along with alarm. This driver supports the RTC driver for + the TPS6586X RTC module. + config RTC_DRV_TPS65910 tristate "TI TPS65910 RTC driver" depends on RTC_CLASS && MFD_TPS65910 diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index c3f62c80dc0..4418ef3f9ec 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -111,6 +111,7 @@ obj-$(CONFIG_RTC_DRV_TEGRA) += rtc-tegra.o obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o obj-$(CONFIG_RTC_DRV_TILE) += rtc-tile.o obj-$(CONFIG_RTC_DRV_TWL4030) += rtc-twl.o +obj-$(CONFIG_RTC_DRV_TPS6586X) += rtc-tps6586x.o obj-$(CONFIG_RTC_DRV_TPS65910) += rtc-tps65910.o obj-$(CONFIG_RTC_DRV_TX4939) += rtc-tx4939.o obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o diff --git a/drivers/rtc/rtc-da9055.c b/drivers/rtc/rtc-da9055.c index 96bafc5c3bf..8f0dcfedb83 100644 --- a/drivers/rtc/rtc-da9055.c +++ b/drivers/rtc/rtc-da9055.c @@ -227,7 +227,7 @@ static const struct rtc_class_ops da9055_rtc_ops = { .alarm_irq_enable = da9055_rtc_alarm_irq_enable, }; -static int __init da9055_rtc_device_init(struct da9055 *da9055, +static int da9055_rtc_device_init(struct da9055 *da9055, struct da9055_pdata *pdata) { int ret; diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c index 5ba2f756a52..c84ea6659f4 100644 --- a/drivers/rtc/rtc-tegra.c +++ b/drivers/rtc/rtc-tegra.c @@ -303,6 +303,12 @@ static struct rtc_class_ops tegra_rtc_ops = { .alarm_irq_enable = tegra_rtc_alarm_irq_enable, }; +static const struct of_device_id tegra_rtc_dt_match[] = { + { .compatible = "nvidia,tegra20-rtc", }, + {} +}; +MODULE_DEVICE_TABLE(of, tegra_rtc_dt_match); + static int tegra_rtc_probe(struct platform_device *pdev) { struct tegra_rtc_info *info; @@ -440,6 +446,7 @@ static struct platform_driver tegra_rtc_driver = { .driver = { .name = "tegra_rtc", .owner = THIS_MODULE, + .of_match_table = tegra_rtc_dt_match, }, #ifdef CONFIG_PM .suspend = tegra_rtc_suspend, diff --git a/drivers/rtc/rtc-tps6586x.c b/drivers/rtc/rtc-tps6586x.c new file mode 100644 index 00000000000..70f61b8e9e6 --- /dev/null +++ b/drivers/rtc/rtc-tps6586x.c @@ -0,0 +1,356 @@ +/* + * rtc-tps6586x.c: RTC driver for TI PMIC TPS6586X + * + * Copyright (c) 2012, NVIDIA Corporation. + * + * Author: Laxman Dewangan <ldewangan@nvidia.com> + * + * 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 version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, + * whether express or implied; 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/device.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/mfd/tps6586x.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/rtc.h> +#include <linux/slab.h> + +#define RTC_CTRL 0xc0 +#define POR_RESET_N BIT(7) +#define OSC_SRC_SEL BIT(6) +#define RTC_ENABLE BIT(5) /* enables alarm */ +#define RTC_BUF_ENABLE BIT(4) /* 32 KHz buffer enable */ +#define PRE_BYPASS BIT(3) /* 0=1KHz or 1=32KHz updates */ +#define CL_SEL_MASK (BIT(2)|BIT(1)) +#define CL_SEL_POS 1 +#define RTC_ALARM1_HI 0xc1 +#define RTC_COUNT4 0xc6 + +/* start a PMU RTC access by reading the register prior to the RTC_COUNT4 */ +#define RTC_COUNT4_DUMMYREAD 0xc5 + +/*only 14-bits width in second*/ +#define ALM1_VALID_RANGE_IN_SEC 0x3FFF + +#define TPS6586X_RTC_CL_SEL_1_5PF 0x0 +#define TPS6586X_RTC_CL_SEL_6_5PF 0x1 +#define TPS6586X_RTC_CL_SEL_7_5PF 0x2 +#define TPS6586X_RTC_CL_SEL_12_5PF 0x3 + +struct tps6586x_rtc { + struct device *dev; + struct rtc_device *rtc; + int irq; + bool irq_en; + unsigned long long epoch_start; +}; + +static inline struct device *to_tps6586x_dev(struct device *dev) +{ + return dev->parent; +} + +static int tps6586x_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + struct device *tps_dev = to_tps6586x_dev(dev); + unsigned long long ticks = 0; + unsigned long seconds; + u8 buff[6]; + int ret; + int i; + + ret = tps6586x_reads(tps_dev, RTC_COUNT4_DUMMYREAD, sizeof(buff), buff); + if (ret < 0) { + dev_err(dev, "read counter failed with err %d\n", ret); + return ret; + } + + for (i = 1; i < sizeof(buff); i++) { + ticks <<= 8; + ticks |= buff[i]; + } + + seconds = ticks >> 10; + seconds += rtc->epoch_start; + rtc_time_to_tm(seconds, tm); + return rtc_valid_tm(tm); +} + +static int tps6586x_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + struct device *tps_dev = to_tps6586x_dev(dev); + unsigned long long ticks; + unsigned long seconds; + u8 buff[5]; + int ret; + + rtc_tm_to_time(tm, &seconds); + if (seconds < rtc->epoch_start) { + dev_err(dev, "requested time unsupported\n"); + return -EINVAL; + } + seconds -= rtc->epoch_start; + + ticks = (unsigned long long)seconds << 10; + buff[0] = (ticks >> 32) & 0xff; + buff[1] = (ticks >> 24) & 0xff; + buff[2] = (ticks >> 16) & 0xff; + buff[3] = (ticks >> 8) & 0xff; + buff[4] = ticks & 0xff; + + /* Disable RTC before changing time */ + ret = tps6586x_clr_bits(tps_dev, RTC_CTRL, RTC_ENABLE); + if (ret < 0) { + dev_err(dev, "failed to clear RTC_ENABLE\n"); + return ret; + } + + ret = tps6586x_writes(tps_dev, RTC_COUNT4, sizeof(buff), buff); + if (ret < 0) { + dev_err(dev, "failed to program new time\n"); + return ret; + } + + /* Enable RTC */ + ret = tps6586x_set_bits(tps_dev, RTC_CTRL, RTC_ENABLE); + if (ret < 0) { + dev_err(dev, "failed to set RTC_ENABLE\n"); + return ret; + } + return 0; +} + +static int tps6586x_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + + if (enabled && !rtc->irq_en) { + enable_irq(rtc->irq); + rtc->irq_en = true; + } else if (!enabled && rtc->irq_en) { + disable_irq(rtc->irq); + rtc->irq_en = false; + } + return 0; +} + +static int tps6586x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + struct device *tps_dev = to_tps6586x_dev(dev); + unsigned long seconds; + unsigned long ticks; + unsigned long rtc_current_time; + unsigned long long rticks = 0; + u8 buff[3]; + u8 rbuff[6]; + int ret; + int i; + + rtc_tm_to_time(&alrm->time, &seconds); + + if (alrm->enabled && (seconds < rtc->epoch_start)) { + dev_err(dev, "can't set alarm to requested time\n"); + return -EINVAL; + } + + ret = tps6586x_rtc_alarm_irq_enable(dev, alrm->enabled); + if (ret < 0) { + dev_err(dev, "can't set alarm irq, err %d\n", ret); + return ret; + } + + seconds -= rtc->epoch_start; + ret = tps6586x_reads(tps_dev, RTC_COUNT4_DUMMYREAD, + sizeof(rbuff), rbuff); + if (ret < 0) { + dev_err(dev, "read counter failed with err %d\n", ret); + return ret; + } + + for (i = 1; i < sizeof(rbuff); i++) { + rticks <<= 8; + rticks |= rbuff[i]; + } + + rtc_current_time = rticks >> 10; + if ((seconds - rtc_current_time) > ALM1_VALID_RANGE_IN_SEC) + seconds = rtc_current_time - 1; + + ticks = (unsigned long long)seconds << 10; + buff[0] = (ticks >> 16) & 0xff; + buff[1] = (ticks >> 8) & 0xff; + buff[2] = ticks & 0xff; + + ret = tps6586x_writes(tps_dev, RTC_ALARM1_HI, sizeof(buff), buff); + if (ret) + dev_err(dev, "programming alarm failed with err %d\n", ret); + + return ret; +} + +static int tps6586x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + struct device *tps_dev = to_tps6586x_dev(dev); + unsigned long ticks; + unsigned long seconds; + u8 buff[3]; + int ret; + + ret = tps6586x_reads(tps_dev, RTC_ALARM1_HI, sizeof(buff), buff); + if (ret) { + dev_err(dev, "read RTC_ALARM1_HI failed with err %d\n", ret); + return ret; + } + + ticks = (buff[0] << 16) | (buff[1] << 8) | buff[2]; + seconds = ticks >> 10; + seconds += rtc->epoch_start; + + rtc_time_to_tm(seconds, &alrm->time); + return 0; +} + +static const struct rtc_class_ops tps6586x_rtc_ops = { + .read_time = tps6586x_rtc_read_time, + .set_time = tps6586x_rtc_set_time, + .set_alarm = tps6586x_rtc_set_alarm, + .read_alarm = tps6586x_rtc_read_alarm, + .alarm_irq_enable = tps6586x_rtc_alarm_irq_enable, +}; + +static irqreturn_t tps6586x_rtc_irq(int irq, void *data) +{ + struct tps6586x_rtc *rtc = data; + + rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF); + return IRQ_HANDLED; +} + +static int tps6586x_rtc_probe(struct platform_device *pdev) +{ + struct device *tps_dev = to_tps6586x_dev(&pdev->dev); + struct tps6586x_rtc *rtc; + int ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + rtc->dev = &pdev->dev; + rtc->irq = platform_get_irq(pdev, 0); + + /* Set epoch start as 00:00:00:01:01:2009 */ + rtc->epoch_start = mktime(2009, 1, 1, 0, 0, 0); + + /* 1 kHz tick mode, enable tick counting */ + ret = tps6586x_update(tps_dev, RTC_CTRL, + RTC_ENABLE | OSC_SRC_SEL | + ((TPS6586X_RTC_CL_SEL_1_5PF << CL_SEL_POS) & CL_SEL_MASK), + RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK); + if (ret < 0) { + dev_err(&pdev->dev, "unable to start counter\n"); + return ret; + } + + platform_set_drvdata(pdev, rtc); + rtc->rtc = rtc_device_register(dev_name(&pdev->dev), &pdev->dev, + &tps6586x_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc)) { + ret = PTR_ERR(rtc->rtc); + dev_err(&pdev->dev, "RTC device register: ret %d\n", ret); + goto fail_rtc_register; + } + + ret = request_threaded_irq(rtc->irq, NULL, tps6586x_rtc_irq, + IRQF_ONESHOT | IRQF_EARLY_RESUME, + dev_name(&pdev->dev), rtc); + if (ret < 0) { + dev_err(&pdev->dev, "request IRQ(%d) failed with ret %d\n", + rtc->irq, ret); + goto fail_req_irq; + } + disable_irq(rtc->irq); + device_set_wakeup_capable(&pdev->dev, 1); + return 0; + +fail_req_irq: + rtc_device_unregister(rtc->rtc); + +fail_rtc_register: + tps6586x_update(tps_dev, RTC_CTRL, 0, + RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK); + return ret; +}; + +static int tps6586x_rtc_remove(struct platform_device *pdev) +{ + struct tps6586x_rtc *rtc = platform_get_drvdata(pdev); + struct device *tps_dev = to_tps6586x_dev(&pdev->dev); + + tps6586x_update(tps_dev, RTC_CTRL, 0, + RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK); + rtc_device_unregister(rtc->rtc); + free_irq(rtc->irq, rtc); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int tps6586x_rtc_suspend(struct device *dev) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(rtc->irq); + return 0; +} + +static int tps6586x_rtc_resume(struct device *dev) +{ + struct tps6586x_rtc *rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(rtc->irq); + return 0; +} +#endif + +static const struct dev_pm_ops tps6586x_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(tps6586x_rtc_suspend, tps6586x_rtc_resume) +}; + +static struct platform_driver tps6586x_rtc_driver = { + .driver = { + .name = "tps6586x-rtc", + .owner = THIS_MODULE, + .pm = &tps6586x_pm_ops, + }, + .probe = tps6586x_rtc_probe, + .remove = tps6586x_rtc_remove, +}; +module_platform_driver(tps6586x_rtc_driver); + +MODULE_ALIAS("platform:rtc-tps6586x"); +MODULE_DESCRIPTION("TI TPS6586x RTC driver"); +MODULE_AUTHOR("Laxman dewangan <ldewangan@nvidia.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/rtc/rtc-vt8500.c b/drivers/rtc/rtc-vt8500.c index fd1418750ac..00c930f4b6f 100644 --- a/drivers/rtc/rtc-vt8500.c +++ b/drivers/rtc/rtc-vt8500.c @@ -70,7 +70,7 @@ | ALARM_SEC_BIT) #define VT8500_RTC_CR_ENABLE (1 << 0) /* Enable RTC */ -#define VT8500_RTC_CR_24H (1 << 1) /* 24h time format */ +#define VT8500_RTC_CR_12H (1 << 1) /* 12h time format */ #define VT8500_RTC_CR_SM_ENABLE (1 << 2) /* Enable periodic irqs */ #define VT8500_RTC_CR_SM_SEC (1 << 3) /* 0: 1Hz/60, 1: 1Hz */ #define VT8500_RTC_CR_CALIB (1 << 4) /* Enable calibration */ @@ -119,7 +119,7 @@ static int vt8500_rtc_read_time(struct device *dev, struct rtc_time *tm) tm->tm_min = bcd2bin((time & TIME_MIN_MASK) >> TIME_MIN_S); tm->tm_hour = bcd2bin((time & TIME_HOUR_MASK) >> TIME_HOUR_S); tm->tm_mday = bcd2bin(date & DATE_DAY_MASK); - tm->tm_mon = bcd2bin((date & DATE_MONTH_MASK) >> DATE_MONTH_S); + tm->tm_mon = bcd2bin((date & DATE_MONTH_MASK) >> DATE_MONTH_S) - 1; tm->tm_year = bcd2bin((date & DATE_YEAR_MASK) >> DATE_YEAR_S) + ((date >> DATE_CENTURY_S) & 1 ? 200 : 100); tm->tm_wday = (time & TIME_DOW_MASK) >> TIME_DOW_S; @@ -138,8 +138,9 @@ static int vt8500_rtc_set_time(struct device *dev, struct rtc_time *tm) } writel((bin2bcd(tm->tm_year - 100) << DATE_YEAR_S) - | (bin2bcd(tm->tm_mon) << DATE_MONTH_S) - | (bin2bcd(tm->tm_mday)), + | (bin2bcd(tm->tm_mon + 1) << DATE_MONTH_S) + | (bin2bcd(tm->tm_mday)) + | ((tm->tm_year >= 200) << DATE_CENTURY_S), vt8500_rtc->regbase + VT8500_RTC_DS); writel((bin2bcd(tm->tm_wday) << TIME_DOW_S) | (bin2bcd(tm->tm_hour) << TIME_HOUR_S) @@ -247,7 +248,7 @@ static int vt8500_rtc_probe(struct platform_device *pdev) } /* Enable RTC and set it to 24-hour mode */ - writel(VT8500_RTC_CR_ENABLE | VT8500_RTC_CR_24H, + writel(VT8500_RTC_CR_ENABLE, vt8500_rtc->regbase + VT8500_RTC_CR); vt8500_rtc->rtc = rtc_device_register("vt8500-rtc", &pdev->dev, |