diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/rtc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/rtc/rtc-mpc5121.c | 81 | ||||
| -rw-r--r-- | drivers/rtc/rtc-pm8xxx.c | 550 | ||||
| -rw-r--r-- | drivers/rtc/rtc-s3c.c | 27 | ||||
| -rw-r--r-- | drivers/rtc/rtc-tegra.c | 2 | ||||
| -rw-r--r-- | drivers/rtc/rtc-twl.c | 2 |
7 files changed, 664 insertions, 13 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index dcb61e23b98..5a538fc1cc8 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1006,10 +1006,10 @@ config RTC_DRV_MC13XXX config RTC_DRV_MPC5121 tristate "Freescale MPC5121 built-in RTC" - depends on PPC_MPC512x && RTC_CLASS + depends on PPC_MPC512x || PPC_MPC52xx help If you say yes here you will get support for the - built-in RTC MPC5121. + built-in RTC on MPC5121 or on MPC5200. This driver can also be built as a module. If so, the module will be called rtc-mpc5121. @@ -1034,6 +1034,16 @@ config RTC_DRV_LPC32XX This driver can also be buillt as a module. If so, the module will be called rtc-lpc32xx. +config RTC_DRV_PM8XXX + tristate "Qualcomm PMIC8XXX RTC" + depends on MFD_PM8XXX + help + If you say yes here you get support for the + Qualcomm PMIC8XXX RTC. + + To compile this driver as a module, choose M here: the + module will be called rtc-pm8xxx. + config RTC_DRV_TEGRA tristate "NVIDIA Tegra Internal RTC driver" depends on RTC_CLASS && ARCH_TEGRA diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 0ffefe877bf..6e6982335c1 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -77,6 +77,7 @@ obj-$(CONFIG_RTC_DRV_PCF2123) += rtc-pcf2123.o obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o obj-$(CONFIG_RTC_DRV_PL030) += rtc-pl030.o obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o +obj-$(CONFIG_RTC_DRV_PM8XXX) += rtc-pm8xxx.o obj-$(CONFIG_RTC_DRV_PS3) += rtc-ps3.o obj-$(CONFIG_RTC_DRV_PUV3) += rtc-puv3.o obj-$(CONFIG_RTC_DRV_PXA) += rtc-pxa.o diff --git a/drivers/rtc/rtc-mpc5121.c b/drivers/rtc/rtc-mpc5121.c index 09ccd8d3ba2..da60915818b 100644 --- a/drivers/rtc/rtc-mpc5121.c +++ b/drivers/rtc/rtc-mpc5121.c @@ -3,6 +3,7 @@ * * Copyright 2007, Domen Puncer <domen.puncer@telargo.com> * Copyright 2008, Freescale Semiconductor, Inc. All rights reserved. + * Copyright 2011, Dmitry Eremin-Solenikov * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -145,6 +146,55 @@ static int mpc5121_rtc_set_time(struct device *dev, struct rtc_time *tm) return 0; } +static int mpc5200_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev); + struct mpc5121_rtc_regs __iomem *regs = rtc->regs; + int tmp; + + tm->tm_sec = in_8(®s->second); + tm->tm_min = in_8(®s->minute); + + /* 12 hour format? */ + if (in_8(®s->hour) & 0x20) + tm->tm_hour = (in_8(®s->hour) >> 1) + + (in_8(®s->hour) & 1 ? 12 : 0); + else + tm->tm_hour = in_8(®s->hour); + + tmp = in_8(®s->wday_mday); + tm->tm_mday = tmp & 0x1f; + tm->tm_mon = in_8(®s->month) - 1; + tm->tm_year = in_be16(®s->year) - 1900; + tm->tm_wday = (tmp >> 5) % 7; + tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year); + tm->tm_isdst = 0; + + return 0; +} + +static int mpc5200_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev); + struct mpc5121_rtc_regs __iomem *regs = rtc->regs; + + mpc5121_rtc_update_smh(regs, tm); + + /* date */ + out_8(®s->month_set, tm->tm_mon + 1); + out_8(®s->weekday_set, tm->tm_wday ? tm->tm_wday : 7); + out_8(®s->date_set, tm->tm_mday); + out_be16(®s->year_set, tm->tm_year + 1900); + + /* set date sequence */ + out_8(®s->set_date, 0x1); + out_8(®s->set_date, 0x3); + out_8(®s->set_date, 0x1); + out_8(®s->set_date, 0x0); + + return 0; +} + static int mpc5121_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) { struct mpc5121_rtc_data *rtc = dev_get_drvdata(dev); @@ -248,11 +298,18 @@ static const struct rtc_class_ops mpc5121_rtc_ops = { .alarm_irq_enable = mpc5121_rtc_alarm_irq_enable, }; +static const struct rtc_class_ops mpc5200_rtc_ops = { + .read_time = mpc5200_rtc_read_time, + .set_time = mpc5200_rtc_set_time, + .read_alarm = mpc5121_rtc_read_alarm, + .set_alarm = mpc5121_rtc_set_alarm, + .alarm_irq_enable = mpc5121_rtc_alarm_irq_enable, +}; + static int __devinit mpc5121_rtc_probe(struct platform_device *op) { struct mpc5121_rtc_data *rtc; int err = 0; - u32 ka; rtc = kzalloc(sizeof(*rtc), GFP_KERNEL); if (!rtc) @@ -287,15 +344,22 @@ static int __devinit mpc5121_rtc_probe(struct platform_device *op) goto out_dispose2; } - ka = in_be32(&rtc->regs->keep_alive); - if (ka & 0x02) { - dev_warn(&op->dev, - "mpc5121-rtc: Battery or oscillator failure!\n"); - out_be32(&rtc->regs->keep_alive, ka); + if (of_device_is_compatible(op->dev.of_node, "fsl,mpc5121-rtc")) { + u32 ka; + ka = in_be32(&rtc->regs->keep_alive); + if (ka & 0x02) { + dev_warn(&op->dev, + "mpc5121-rtc: Battery or oscillator failure!\n"); + out_be32(&rtc->regs->keep_alive, ka); + } + + rtc->rtc = rtc_device_register("mpc5121-rtc", &op->dev, + &mpc5121_rtc_ops, THIS_MODULE); + } else { + rtc->rtc = rtc_device_register("mpc5200-rtc", &op->dev, + &mpc5200_rtc_ops, THIS_MODULE); } - rtc->rtc = rtc_device_register("mpc5121-rtc", &op->dev, - &mpc5121_rtc_ops, THIS_MODULE); if (IS_ERR(rtc->rtc)) { err = PTR_ERR(rtc->rtc); goto out_free_irq; @@ -340,6 +404,7 @@ static int __devexit mpc5121_rtc_remove(struct platform_device *op) static struct of_device_id mpc5121_rtc_match[] __devinitdata = { { .compatible = "fsl,mpc5121-rtc", }, + { .compatible = "fsl,mpc5200-rtc", }, {}, }; diff --git a/drivers/rtc/rtc-pm8xxx.c b/drivers/rtc/rtc-pm8xxx.c new file mode 100644 index 00000000000..d420e9d877e --- /dev/null +++ b/drivers/rtc/rtc-pm8xxx.c @@ -0,0 +1,550 @@ +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/rtc.h> +#include <linux/pm.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +#include <linux/mfd/pm8xxx/core.h> +#include <linux/mfd/pm8xxx/rtc.h> + + +/* RTC Register offsets from RTC CTRL REG */ +#define PM8XXX_ALARM_CTRL_OFFSET 0x01 +#define PM8XXX_RTC_WRITE_OFFSET 0x02 +#define PM8XXX_RTC_READ_OFFSET 0x06 +#define PM8XXX_ALARM_RW_OFFSET 0x0A + +/* RTC_CTRL register bit fields */ +#define PM8xxx_RTC_ENABLE BIT(7) +#define PM8xxx_RTC_ALARM_ENABLE BIT(1) +#define PM8xxx_RTC_ALARM_CLEAR BIT(0) + +#define NUM_8_BIT_RTC_REGS 0x4 + +/** + * struct pm8xxx_rtc - rtc driver internal structure + * @rtc: rtc device for this driver. + * @rtc_alarm_irq: rtc alarm irq number. + * @rtc_base: address of rtc control register. + * @rtc_read_base: base address of read registers. + * @rtc_write_base: base address of write registers. + * @alarm_rw_base: base address of alarm registers. + * @ctrl_reg: rtc control register. + * @rtc_dev: device structure. + * @ctrl_reg_lock: spinlock protecting access to ctrl_reg. + */ +struct pm8xxx_rtc { + struct rtc_device *rtc; + int rtc_alarm_irq; + int rtc_base; + int rtc_read_base; + int rtc_write_base; + int alarm_rw_base; + u8 ctrl_reg; + struct device *rtc_dev; + spinlock_t ctrl_reg_lock; +}; + +/* + * The RTC registers need to be read/written one byte at a time. This is a + * hardware limitation. + */ +static int pm8xxx_read_wrapper(struct pm8xxx_rtc *rtc_dd, u8 *rtc_val, + int base, int count) +{ + int i, rc; + struct device *parent = rtc_dd->rtc_dev->parent; + + for (i = 0; i < count; i++) { + rc = pm8xxx_readb(parent, base + i, &rtc_val[i]); + if (rc < 0) { + dev_err(rtc_dd->rtc_dev, "PMIC read failed\n"); + return rc; + } + } + + return 0; +} + +static int pm8xxx_write_wrapper(struct pm8xxx_rtc *rtc_dd, u8 *rtc_val, + int base, int count) +{ + int i, rc; + struct device *parent = rtc_dd->rtc_dev->parent; + + for (i = 0; i < count; i++) { + rc = pm8xxx_writeb(parent, base + i, rtc_val[i]); + if (rc < 0) { + dev_err(rtc_dd->rtc_dev, "PMIC write failed\n"); + return rc; + } + } + + return 0; +} + +/* + * Steps to write the RTC registers. + * 1. Disable alarm if enabled. + * 2. Write 0x00 to LSB. + * 3. Write Byte[1], Byte[2], Byte[3] then Byte[0]. + * 4. Enable alarm if disabled in step 1. + */ +static int pm8xxx_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + int rc, i; + unsigned long secs, irq_flags; + u8 value[NUM_8_BIT_RTC_REGS], reg = 0, alarm_enabled = 0, ctrl_reg; + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + rtc_tm_to_time(tm, &secs); + + for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) { + value[i] = secs & 0xFF; + secs >>= 8; + } + + dev_dbg(dev, "Seconds value to be written to RTC = %lu\n", secs); + + spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); + ctrl_reg = rtc_dd->ctrl_reg; + + if (ctrl_reg & PM8xxx_RTC_ALARM_ENABLE) { + alarm_enabled = 1; + ctrl_reg &= ~PM8xxx_RTC_ALARM_ENABLE; + rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, + 1); + if (rc < 0) { + dev_err(dev, "Write to RTC control register " + "failed\n"); + goto rtc_rw_fail; + } + rtc_dd->ctrl_reg = ctrl_reg; + } else + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + + /* Write 0 to Byte[0] */ + reg = 0; + rc = pm8xxx_write_wrapper(rtc_dd, ®, rtc_dd->rtc_write_base, 1); + if (rc < 0) { + dev_err(dev, "Write to RTC write data register failed\n"); + goto rtc_rw_fail; + } + + /* Write Byte[1], Byte[2], Byte[3] */ + rc = pm8xxx_write_wrapper(rtc_dd, value + 1, + rtc_dd->rtc_write_base + 1, 3); + if (rc < 0) { + dev_err(dev, "Write to RTC write data register failed\n"); + goto rtc_rw_fail; + } + + /* Write Byte[0] */ + rc = pm8xxx_write_wrapper(rtc_dd, value, rtc_dd->rtc_write_base, 1); + if (rc < 0) { + dev_err(dev, "Write to RTC write data register failed\n"); + goto rtc_rw_fail; + } + + if (alarm_enabled) { + ctrl_reg |= PM8xxx_RTC_ALARM_ENABLE; + rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, + 1); + if (rc < 0) { + dev_err(dev, "Write to RTC control register " + "failed\n"); + goto rtc_rw_fail; + } + rtc_dd->ctrl_reg = ctrl_reg; + } + +rtc_rw_fail: + if (alarm_enabled) + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + + return rc; +} + +static int pm8xxx_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + int rc; + u8 value[NUM_8_BIT_RTC_REGS], reg; + unsigned long secs; + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + rc = pm8xxx_read_wrapper(rtc_dd, value, rtc_dd->rtc_read_base, + NUM_8_BIT_RTC_REGS); + if (rc < 0) { + dev_err(dev, "RTC read data register failed\n"); + return rc; + } + + /* + * Read the LSB again and check if there has been a carry over. + * If there is, redo the read operation. + */ + rc = pm8xxx_read_wrapper(rtc_dd, ®, rtc_dd->rtc_read_base, 1); + if (rc < 0) { + dev_err(dev, "RTC read data register failed\n"); + return rc; + } + + if (unlikely(reg < value[0])) { + rc = pm8xxx_read_wrapper(rtc_dd, value, + rtc_dd->rtc_read_base, NUM_8_BIT_RTC_REGS); + if (rc < 0) { + dev_err(dev, "RTC read data register failed\n"); + return rc; + } + } + + secs = value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24); + + rtc_time_to_tm(secs, tm); + + rc = rtc_valid_tm(tm); + if (rc < 0) { + dev_err(dev, "Invalid time read from RTC\n"); + return rc; + } + + dev_dbg(dev, "secs = %lu, h:m:s == %d:%d:%d, d/m/y = %d/%d/%d\n", + secs, tm->tm_hour, tm->tm_min, tm->tm_sec, + tm->tm_mday, tm->tm_mon, tm->tm_year); + + return 0; +} + +static int pm8xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + int rc, i; + u8 value[NUM_8_BIT_RTC_REGS], ctrl_reg; + unsigned long secs, irq_flags; + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + rtc_tm_to_time(&alarm->time, &secs); + + for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) { + value[i] = secs & 0xFF; + secs >>= 8; + } + + spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); + + rc = pm8xxx_write_wrapper(rtc_dd, value, rtc_dd->alarm_rw_base, + NUM_8_BIT_RTC_REGS); + if (rc < 0) { + dev_err(dev, "Write to RTC ALARM register failed\n"); + goto rtc_rw_fail; + } + + ctrl_reg = rtc_dd->ctrl_reg; + ctrl_reg = alarm->enabled ? (ctrl_reg | PM8xxx_RTC_ALARM_ENABLE) : + (ctrl_reg & ~PM8xxx_RTC_ALARM_ENABLE); + + rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, 1); + if (rc < 0) { + dev_err(dev, "Write to RTC control register failed\n"); + goto rtc_rw_fail; + } + + rtc_dd->ctrl_reg = ctrl_reg; + + dev_dbg(dev, "Alarm Set for h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n", + alarm->time.tm_hour, alarm->time.tm_min, + alarm->time.tm_sec, alarm->time.tm_mday, + alarm->time.tm_mon, alarm->time.tm_year); +rtc_rw_fail: + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + return rc; +} + +static int pm8xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + int rc; + u8 value[NUM_8_BIT_RTC_REGS]; + unsigned long secs; + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + rc = pm8xxx_read_wrapper(rtc_dd, value, rtc_dd->alarm_rw_base, + NUM_8_BIT_RTC_REGS); + if (rc < 0) { + dev_err(dev, "RTC alarm time read failed\n"); + return rc; + } + + secs = value[0] | (value[1] << 8) | (value[2] << 16) | (value[3] << 24); + + rtc_time_to_tm(secs, &alarm->time); + + rc = rtc_valid_tm(&alarm->time); + if (rc < 0) { + dev_err(dev, "Invalid alarm time read from RTC\n"); + return rc; + } + + dev_dbg(dev, "Alarm set for - h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n", + alarm->time.tm_hour, alarm->time.tm_min, + alarm->time.tm_sec, alarm->time.tm_mday, + alarm->time.tm_mon, alarm->time.tm_year); + + return 0; +} + +static int pm8xxx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) +{ + int rc; + unsigned long irq_flags; + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + u8 ctrl_reg; + + spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); + ctrl_reg = rtc_dd->ctrl_reg; + ctrl_reg = (enable) ? (ctrl_reg | PM8xxx_RTC_ALARM_ENABLE) : + (ctrl_reg & ~PM8xxx_RTC_ALARM_ENABLE); + + rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, 1); + if (rc < 0) { + dev_err(dev, "Write to RTC control register failed\n"); + goto rtc_rw_fail; + } + + rtc_dd->ctrl_reg = ctrl_reg; + +rtc_rw_fail: + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + return rc; +} + +static struct rtc_class_ops pm8xxx_rtc_ops = { + .read_time = pm8xxx_rtc_read_time, + .set_alarm = pm8xxx_rtc_set_alarm, + .read_alarm = pm8xxx_rtc_read_alarm, + .alarm_irq_enable = pm8xxx_rtc_alarm_irq_enable, +}; + +static irqreturn_t pm8xxx_alarm_trigger(int irq, void *dev_id) +{ + struct pm8xxx_rtc *rtc_dd = dev_id; + u8 ctrl_reg; + int rc; + unsigned long irq_flags; + + rtc_update_irq(rtc_dd->rtc, 1, RTC_IRQF | RTC_AF); + + spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); + + /* Clear the alarm enable bit */ + ctrl_reg = rtc_dd->ctrl_reg; + ctrl_reg &= ~PM8xxx_RTC_ALARM_ENABLE; + + rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, 1); + if (rc < 0) { + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + dev_err(rtc_dd->rtc_dev, "Write to RTC control register " + "failed\n"); + goto rtc_alarm_handled; + } + + rtc_dd->ctrl_reg = ctrl_reg; + spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags); + + /* Clear RTC alarm register */ + rc = pm8xxx_read_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base + + PM8XXX_ALARM_CTRL_OFFSET, 1); + if (rc < 0) { + dev_err(rtc_dd->rtc_dev, "RTC Alarm control register read " + "failed\n"); + goto rtc_alarm_handled; + } + + ctrl_reg &= ~PM8xxx_RTC_ALARM_CLEAR; + rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base + + PM8XXX_ALARM_CTRL_OFFSET, 1); + if (rc < 0) + dev_err(rtc_dd->rtc_dev, "Write to RTC Alarm control register" + " failed\n"); + +rtc_alarm_handled: + return IRQ_HANDLED; +} + +static int __devinit pm8xxx_rtc_probe(struct platform_device *pdev) +{ + int rc; + u8 ctrl_reg; + bool rtc_write_enable = false; + struct pm8xxx_rtc *rtc_dd; + struct resource *rtc_resource; + const struct pm8xxx_rtc_platform_data *pdata = + dev_get_platdata(&pdev->dev); + + if (pdata != NULL) + rtc_write_enable = pdata->rtc_write_enable; + + rtc_dd = kzalloc(sizeof(*rtc_dd), GFP_KERNEL); + if (rtc_dd == NULL) { + dev_err(&pdev->dev, "Unable to allocate memory!\n"); + return -ENOMEM; + } + + /* Initialise spinlock to protect RTC control register */ + spin_lock_init(&rtc_dd->ctrl_reg_lock); + + rtc_dd->rtc_alarm_irq = platform_get_irq(pdev, 0); + if (rtc_dd->rtc_alarm_irq < 0) { + dev_err(&pdev->dev, "Alarm IRQ resource absent!\n"); + rc = -ENXIO; + goto fail_rtc_enable; + } + + rtc_resource = platform_get_resource_byname(pdev, IORESOURCE_IO, + "pmic_rtc_base"); + if (!(rtc_resource && rtc_resource->start)) { + dev_err(&pdev->dev, "RTC IO resource absent!\n"); + rc = -ENXIO; + goto fail_rtc_enable; + } + + rtc_dd->rtc_base = rtc_resource->start; + + /* Setup RTC register addresses */ + rtc_dd->rtc_write_base = rtc_dd->rtc_base + PM8XXX_RTC_WRITE_OFFSET; + rtc_dd->rtc_read_base = rtc_dd->rtc_base + PM8XXX_RTC_READ_OFFSET; + rtc_dd->alarm_rw_base = rtc_dd->rtc_base + PM8XXX_ALARM_RW_OFFSET; + + rtc_dd->rtc_dev = &pdev->dev; + + /* Check if the RTC is on, else turn it on */ + rc = pm8xxx_read_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, 1); + if (rc < 0) { + dev_err(&pdev->dev, "RTC control register read failed!\n"); + goto fail_rtc_enable; + } + + if (!(ctrl_reg & PM8xxx_RTC_ENABLE)) { + ctrl_reg |= PM8xxx_RTC_ENABLE; + rc = pm8xxx_write_wrapper(rtc_dd, &ctrl_reg, rtc_dd->rtc_base, + 1); + if (rc < 0) { + dev_err(&pdev->dev, "Write to RTC control register " + "failed\n"); + goto fail_rtc_enable; + } + } + + rtc_dd->ctrl_reg = ctrl_reg; + if (rtc_write_enable == true) + pm8xxx_rtc_ops.set_time = pm8xxx_rtc_set_time; + + platform_set_drvdata(pdev, rtc_dd); + + /* Register the RTC device */ + rtc_dd->rtc = rtc_device_register("pm8xxx_rtc", &pdev->dev, + &pm8xxx_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc_dd->rtc)) { + dev_err(&pdev->dev, "%s: RTC registration failed (%ld)\n", + __func__, PTR_ERR(rtc_dd->rtc)); + rc = PTR_ERR(rtc_dd->rtc); + goto fail_rtc_enable; + } + + /* Request the alarm IRQ */ + rc = request_any_context_irq(rtc_dd->rtc_alarm_irq, + pm8xxx_alarm_trigger, IRQF_TRIGGER_RISING, + "pm8xxx_rtc_alarm", rtc_dd); + if (rc < 0) { + dev_err(&pdev->dev, "Request IRQ failed (%d)\n", rc); + goto fail_req_irq; + } + + device_init_wakeup(&pdev->dev, 1); + + dev_dbg(&pdev->dev, "Probe success !!\n"); + + return 0; + +fail_req_irq: + rtc_device_unregister(rtc_dd->rtc); +fail_rtc_enable: + platform_set_drvdata(pdev, NULL); + kfree(rtc_dd); + return rc; +} + +static int __devexit pm8xxx_rtc_remove(struct platform_device *pdev) +{ + struct pm8xxx_rtc *rtc_dd = platform_get_drvdata(pdev); + + device_init_wakeup(&pdev->dev, 0); + free_irq(rtc_dd->rtc_alarm_irq, rtc_dd); + rtc_device_unregister(rtc_dd->rtc); + platform_set_drvdata(pdev, NULL); + kfree(rtc_dd); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int pm8xxx_rtc_resume(struct device *dev) +{ + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(rtc_dd->rtc_alarm_irq); + + return 0; +} + +static int pm8xxx_rtc_suspend(struct device *dev) +{ + struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(rtc_dd->rtc_alarm_irq); + + return 0; +} +#endif + +SIMPLE_DEV_PM_OPS(pm8xxx_rtc_pm_ops, pm8xxx_rtc_suspend, pm8xxx_rtc_resume); + +static struct platform_driver pm8xxx_rtc_driver = { + .probe = pm8xxx_rtc_probe, + .remove = __devexit_p(pm8xxx_rtc_remove), + .driver = { + .name = PM8XXX_RTC_DEV_NAME, + .owner = THIS_MODULE, + .pm = &pm8xxx_rtc_pm_ops, + }, +}; + +static int __init pm8xxx_rtc_init(void) +{ + return platform_driver_register(&pm8xxx_rtc_driver); +} +module_init(pm8xxx_rtc_init); + +static void __exit pm8xxx_rtc_exit(void) +{ + platform_driver_unregister(&pm8xxx_rtc_driver); +} +module_exit(pm8xxx_rtc_exit); + +MODULE_ALIAS("platform:rtc-pm8xxx"); +MODULE_DESCRIPTION("PMIC8xxx RTC driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Anirudh Ghayal <aghayal@codeaurora.org>"); diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index 2a65e85e0f5..9329dbb9eba 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -57,11 +57,13 @@ static irqreturn_t s3c_rtc_alarmirq(int irq, void *id) { struct rtc_device *rdev = id; + clk_enable(rtc_clk); rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF); if (s3c_rtc_cpu_type == TYPE_S3C64XX) writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP); + clk_disable(rtc_clk); return IRQ_HANDLED; } @@ -69,11 +71,13 @@ static irqreturn_t s3c_rtc_tickirq(int irq, void *id) { struct rtc_device *rdev = id; + clk_enable(rtc_clk); rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF); if (s3c_rtc_cpu_type == TYPE_S3C64XX) writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP); + clk_disable(rtc_clk); return IRQ_HANDLED; } @@ -84,12 +88,14 @@ static int s3c_rtc_setaie(struct device *dev, unsigned int enabled) pr_debug("%s: aie=%d\n", __func__, enabled); + clk_enable(rtc_clk); tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN; if (enabled) tmp |= S3C2410_RTCALM_ALMEN; writeb(tmp, s3c_rtc_base + S3C2410_RTCALM); + clk_disable(rtc_clk); return 0; } @@ -103,6 +109,7 @@ static int s3c_rtc_setfreq(struct device *dev, int freq) if (!is_power_of_2(freq)) return -EINVAL; + clk_enable(rtc_clk); spin_lock_irq(&s3c_rtc_pie_lock); if (s3c_rtc_cpu_type == TYPE_S3C2410) { @@ -114,6 +121,7 @@ static int s3c_rtc_setfreq(struct device *dev, int freq) writel(tmp, s3c_rtc_base + S3C2410_TICNT); spin_unlock_irq(&s3c_rtc_pie_lock); + clk_disable(rtc_clk); return 0; } @@ -125,6 +133,7 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) unsigned int have_retried = 0; void __iomem *base = s3c_rtc_base; + clk_enable(rtc_clk); retry_get_time: rtc_tm->tm_min = readb(base + S3C2410_RTCMIN); rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR); @@ -157,6 +166,7 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) rtc_tm->tm_year += 100; rtc_tm->tm_mon -= 1; + clk_disable(rtc_clk); return rtc_valid_tm(rtc_tm); } @@ -165,6 +175,7 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm) void __iomem *base = s3c_rtc_base; int year = tm->tm_year - 100; + clk_enable(rtc_clk); pr_debug("set time %04d.%02d.%02d %02d:%02d:%02d\n", 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); @@ -182,6 +193,7 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm) writeb(bin2bcd(tm->tm_mday), base + S3C2410_RTCDATE); writeb(bin2bcd(tm->tm_mon + 1), base + S3C2410_RTCMON); writeb(bin2bcd(year), base + S3C2410_RTCYEAR); + clk_disable(rtc_clk); return 0; } @@ -192,6 +204,7 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) void __iomem *base = s3c_rtc_base; unsigned int alm_en; + clk_enable(rtc_clk); alm_tm->tm_sec = readb(base + S3C2410_ALMSEC); alm_tm->tm_min = readb(base + S3C2410_ALMMIN); alm_tm->tm_hour = readb(base + S3C2410_ALMHOUR); @@ -243,6 +256,7 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm) else alm_tm->tm_year = -1; + clk_disable(rtc_clk); return 0; } @@ -252,6 +266,7 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) void __iomem *base = s3c_rtc_base; unsigned int alrm_en; + clk_enable(rtc_clk); pr_debug("s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n", alrm->enabled, 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, @@ -282,6 +297,7 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) s3c_rtc_setaie(dev, alrm->enabled); + clk_disable(rtc_clk); return 0; } @@ -289,6 +305,7 @@ static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) { unsigned int ticnt; + clk_enable(rtc_clk); if (s3c_rtc_cpu_type == TYPE_S3C64XX) { ticnt = readw(s3c_rtc_base + S3C2410_RTCCON); ticnt &= S3C64XX_RTCCON_TICEN; @@ -298,6 +315,7 @@ static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) } seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no"); + clk_disable(rtc_clk); return 0; } @@ -360,6 +378,7 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en) if (s3c_rtc_base == NULL) return; + clk_enable(rtc_clk); if (!en) { tmp = readw(base + S3C2410_RTCCON); if (s3c_rtc_cpu_type == TYPE_S3C64XX) @@ -399,6 +418,7 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en) base + S3C2410_RTCCON); } } + clk_disable(rtc_clk); } static int __devexit s3c_rtc_remove(struct platform_device *dev) @@ -410,7 +430,6 @@ static int __devexit s3c_rtc_remove(struct platform_device *dev) s3c_rtc_setaie(&dev->dev, 0); - clk_disable(rtc_clk); clk_put(rtc_clk); rtc_clk = NULL; @@ -529,6 +548,8 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev) s3c_rtc_setfreq(&pdev->dev, 1); + clk_disable(rtc_clk); + return 0; err_nortc: @@ -554,6 +575,7 @@ static int ticnt_save, ticnt_en_save; static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state) { + clk_enable(rtc_clk); /* save TICNT for anyone using periodic interrupts */ ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT); if (s3c_rtc_cpu_type == TYPE_S3C64XX) { @@ -568,6 +590,7 @@ static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state) else dev_err(&pdev->dev, "enable_irq_wake failed\n"); } + clk_disable(rtc_clk); return 0; } @@ -576,6 +599,7 @@ static int s3c_rtc_resume(struct platform_device *pdev) { unsigned int tmp; + clk_enable(rtc_clk); s3c_rtc_enable(pdev, 1); writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT); if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) { @@ -587,6 +611,7 @@ static int s3c_rtc_resume(struct platform_device *pdev) disable_irq_wake(s3c_rtc_alarmno); wake_en = false; } + clk_disable(rtc_clk); return 0; } diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c index 2fc31aac3f4..75259fe3860 100644 --- a/drivers/rtc/rtc-tegra.c +++ b/drivers/rtc/rtc-tegra.c @@ -343,7 +343,7 @@ static int __devinit tegra_rtc_probe(struct platform_device *pdev) /* set context info. */ info->pdev = pdev; - info->tegra_rtc_lock = __SPIN_LOCK_UNLOCKED(info->tegra_rtc_lock); + spin_lock_init(&info->tegra_rtc_lock); platform_set_drvdata(pdev, info); diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c index f9a2799c44d..9a81f778d6b 100644 --- a/drivers/rtc/rtc-twl.c +++ b/drivers/rtc/rtc-twl.c @@ -275,7 +275,7 @@ static int twl_rtc_set_time(struct device *dev, struct rtc_time *tm) goto out; save_control &= ~BIT_RTC_CTRL_REG_STOP_RTC_M; - twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG); + ret = twl_rtc_write_u8(save_control, REG_RTC_CTRL_REG); if (ret < 0) goto out; |