diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/rtc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/rtc/qpnp-rtc.c | 714 |
3 files changed, 724 insertions, 0 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 2a524244afec..da25ffeb520d 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1591,6 +1591,15 @@ config RTC_DRV_MOXART This driver can also be built as a module. If so, the module will be called rtc-moxart +config RTC_DRV_QPNP + tristate "Qualcomm QPNP PMIC RTC" + depends on (SPMI || MSM_SPMI) && OF_SPMI && MSM_QPNP_INT + help + Say Y here if you want to support the Qualcomm QPNP PMIC RTC. + + To compile this driver as a module, choose M here: the + module will be called qpnp-rtc. + config RTC_DRV_MT6397 tristate "Mediatek Real Time Clock driver" depends on MFD_MT6397 || COMPILE_TEST diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 231f76451615..f264c343e6e9 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -118,6 +118,7 @@ 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 +obj-$(CONFIG_RTC_DRV_QPNP) += qpnp-rtc.o obj-$(CONFIG_RTC_DRV_R9701) += rtc-r9701.o obj-$(CONFIG_RTC_DRV_RC5T583) += rtc-rc5t583.o obj-$(CONFIG_RTC_DRV_RK808) += rtc-rk808.o diff --git a/drivers/rtc/qpnp-rtc.c b/drivers/rtc/qpnp-rtc.c new file mode 100644 index 000000000000..bb69b892d5e6 --- /dev/null +++ b/drivers/rtc/qpnp-rtc.c @@ -0,0 +1,714 @@ +/* Copyright (c) 2012-2015, The Linux Foundation. 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/idr.h> +#include <linux/of_device.h> +#include <linux/spmi.h> +#include <linux/spinlock.h> +#include <linux/spmi.h> +#include <linux/alarmtimer.h> + +/* RTC/ALARM Register offsets */ +#define REG_OFFSET_ALARM_RW 0x40 +#define REG_OFFSET_ALARM_CTRL1 0x46 +#define REG_OFFSET_ALARM_CTRL2 0x48 +#define REG_OFFSET_RTC_WRITE 0x40 +#define REG_OFFSET_RTC_CTRL 0x46 +#define REG_OFFSET_RTC_READ 0x48 +#define REG_OFFSET_PERP_SUBTYPE 0x05 + +/* RTC_CTRL register bit fields */ +#define BIT_RTC_ENABLE BIT(7) +#define BIT_RTC_ALARM_ENABLE BIT(7) +#define BIT_RTC_ABORT_ENABLE BIT(0) +#define BIT_RTC_ALARM_CLEAR BIT(0) + +/* RTC/ALARM peripheral subtype values */ +#define RTC_PERPH_SUBTYPE 0x1 +#define ALARM_PERPH_SUBTYPE 0x3 + +#define NUM_8_BIT_RTC_REGS 0x4 + +#define TO_SECS(arr) (arr[0] | (arr[1] << 8) | (arr[2] << 16) | \ + (arr[3] << 24)) + +/* Module parameter to control power-on-alarm */ +bool poweron_alarm; +module_param(poweron_alarm, bool, 0644); +MODULE_PARM_DESC(poweron_alarm, "Enable/Disable power-on alarm"); +EXPORT_SYMBOL(poweron_alarm); + +/* rtc driver internal structure */ +struct qpnp_rtc { + u8 rtc_ctrl_reg; + u8 alarm_ctrl_reg1; + u16 rtc_base; + u16 alarm_base; + u32 rtc_write_enable; + u32 rtc_alarm_powerup; + int rtc_alarm_irq; + struct device *rtc_dev; + struct rtc_device *rtc; + struct spmi_device *spmi; + spinlock_t alarm_ctrl_lock; +}; + +static int qpnp_read_wrapper(struct qpnp_rtc *rtc_dd, u8 *rtc_val, + u16 base, int count) +{ + int rc; + struct spmi_device *spmi = rtc_dd->spmi; + + rc = spmi_ext_register_readl(spmi->ctrl, spmi->sid, base, rtc_val, + count); + if (rc) { + dev_err(rtc_dd->rtc_dev, "SPMI read failed\n"); + return rc; + } + return 0; +} + +static int qpnp_write_wrapper(struct qpnp_rtc *rtc_dd, u8 *rtc_val, + u16 base, int count) +{ + int rc; + struct spmi_device *spmi = rtc_dd->spmi; + + rc = spmi_ext_register_writel(spmi->ctrl, spmi->sid, base, rtc_val, + count); + if (rc) { + dev_err(rtc_dd->rtc_dev, "SPMI write failed\n"); + return rc; + } + + return 0; +} + +static int +qpnp_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + int rc; + unsigned long secs, irq_flags; + u8 value[4], reg = 0, alarm_enabled = 0, ctrl_reg; + u8 rtc_disabled = 0, rtc_ctrl_reg; + struct qpnp_rtc *rtc_dd = dev_get_drvdata(dev); + + rtc_tm_to_time(tm, &secs); + + value[0] = secs & 0xFF; + value[1] = (secs >> 8) & 0xFF; + value[2] = (secs >> 16) & 0xFF; + value[3] = (secs >> 24) & 0xFF; + + dev_dbg(dev, "Seconds value to be written to RTC = %lu\n", secs); + + spin_lock_irqsave(&rtc_dd->alarm_ctrl_lock, irq_flags); + ctrl_reg = rtc_dd->alarm_ctrl_reg1; + + if (ctrl_reg & BIT_RTC_ALARM_ENABLE) { + alarm_enabled = 1; + ctrl_reg &= ~BIT_RTC_ALARM_ENABLE; + rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, + rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); + if (rc) { + dev_err(dev, "Write to ALARM ctrl reg failed\n"); + goto rtc_rw_fail; + } + } else + spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); + + /* + * 32 bit seconds value is coverted to four 8 bit values + * |<------ 32 bit time value in seconds ------>| + * <- 8 bit ->|<- 8 bit ->|<- 8 bit ->|<- 8 bit ->| + * ---------------------------------------------- + * | BYTE[3] | BYTE[2] | BYTE[1] | BYTE[0] | + * ---------------------------------------------- + * + * RTC has four 8 bit registers for writting time in seconds: + * WDATA[3], WDATA[2], WDATA[1], WDATA[0] + * + * Write to the RTC registers should be done in following order + * Clear WDATA[0] register + * + * Write BYTE[1], BYTE[2] and BYTE[3] of time to + * RTC WDATA[3], WDATA[2], WDATA[1] registers + * + * Write BYTE[0] of time to RTC WDATA[0] register + * + * Clearing BYTE[0] and writting in the end will prevent any + * unintentional overflow from WDATA[0] to higher bytes during the + * write operation + */ + + /* Disable RTC H/w before writing on RTC register*/ + rtc_ctrl_reg = rtc_dd->rtc_ctrl_reg; + if (rtc_ctrl_reg & BIT_RTC_ENABLE) { + rtc_disabled = 1; + rtc_ctrl_reg &= ~BIT_RTC_ENABLE; + rc = qpnp_write_wrapper(rtc_dd, &rtc_ctrl_reg, + rtc_dd->rtc_base + REG_OFFSET_RTC_CTRL, 1); + if (rc) { + dev_err(dev, + "Disabling of RTC control reg failed" + " with error:%d\n", rc); + goto rtc_rw_fail; + } + rtc_dd->rtc_ctrl_reg = rtc_ctrl_reg; + } + + /* Clear WDATA[0] */ + reg = 0x0; + rc = qpnp_write_wrapper(rtc_dd, ®, + rtc_dd->rtc_base + REG_OFFSET_RTC_WRITE, 1); + if (rc) { + dev_err(dev, "Write to RTC reg failed\n"); + goto rtc_rw_fail; + } + + /* Write to WDATA[3], WDATA[2] and WDATA[1] */ + rc = qpnp_write_wrapper(rtc_dd, &value[1], + rtc_dd->rtc_base + REG_OFFSET_RTC_WRITE + 1, 3); + if (rc) { + dev_err(dev, "Write to RTC reg failed\n"); + goto rtc_rw_fail; + } + + /* Write to WDATA[0] */ + rc = qpnp_write_wrapper(rtc_dd, value, + rtc_dd->rtc_base + REG_OFFSET_RTC_WRITE, 1); + if (rc) { + dev_err(dev, "Write to RTC reg failed\n"); + goto rtc_rw_fail; + } + + /* Enable RTC H/w after writing on RTC register*/ + if (rtc_disabled) { + rtc_ctrl_reg |= BIT_RTC_ENABLE; + rc = qpnp_write_wrapper(rtc_dd, &rtc_ctrl_reg, + rtc_dd->rtc_base + REG_OFFSET_RTC_CTRL, 1); + if (rc) { + dev_err(dev, + "Enabling of RTC control reg failed" + " with error:%d\n", rc); + goto rtc_rw_fail; + } + rtc_dd->rtc_ctrl_reg = rtc_ctrl_reg; + } + + if (alarm_enabled) { + ctrl_reg |= BIT_RTC_ALARM_ENABLE; + rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, + rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); + if (rc) { + dev_err(dev, "Write to ALARM ctrl reg failed\n"); + goto rtc_rw_fail; + } + } + + rtc_dd->alarm_ctrl_reg1 = ctrl_reg; + +rtc_rw_fail: + if (alarm_enabled) + spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); + + return rc; +} + +static int +qpnp_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + int rc; + u8 value[4], reg; + unsigned long secs; + struct qpnp_rtc *rtc_dd = dev_get_drvdata(dev); + + rc = qpnp_read_wrapper(rtc_dd, value, + rtc_dd->rtc_base + REG_OFFSET_RTC_READ, + NUM_8_BIT_RTC_REGS); + if (rc) { + dev_err(dev, "Read from RTC reg 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 = qpnp_read_wrapper(rtc_dd, ®, + rtc_dd->rtc_base + REG_OFFSET_RTC_READ, 1); + if (rc) { + dev_err(dev, "Read from RTC reg failed\n"); + return rc; + } + + if (reg < value[0]) { + rc = qpnp_read_wrapper(rtc_dd, value, + rtc_dd->rtc_base + REG_OFFSET_RTC_READ, + NUM_8_BIT_RTC_REGS); + if (rc) { + dev_err(dev, "Read from RTC reg failed\n"); + return rc; + } + } + + secs = TO_SECS(value); + + rtc_time_to_tm(secs, tm); + + rc = rtc_valid_tm(tm); + if (rc) { + 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 +qpnp_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + int rc; + u8 value[4], ctrl_reg; + unsigned long secs, secs_rtc, irq_flags; + struct qpnp_rtc *rtc_dd = dev_get_drvdata(dev); + struct rtc_time rtc_tm; + + rtc_tm_to_time(&alarm->time, &secs); + + /* + * Read the current RTC time and verify if the alarm time is in the + * past. If yes, return invalid + */ + rc = qpnp_rtc_read_time(dev, &rtc_tm); + if (rc) { + dev_err(dev, "Unable to read RTC time\n"); + return -EINVAL; + } + + rtc_tm_to_time(&rtc_tm, &secs_rtc); + if (secs < secs_rtc) { + dev_err(dev, "Trying to set alarm in the past\n"); + return -EINVAL; + } + + value[0] = secs & 0xFF; + value[1] = (secs >> 8) & 0xFF; + value[2] = (secs >> 16) & 0xFF; + value[3] = (secs >> 24) & 0xFF; + + spin_lock_irqsave(&rtc_dd->alarm_ctrl_lock, irq_flags); + + rc = qpnp_write_wrapper(rtc_dd, value, + rtc_dd->alarm_base + REG_OFFSET_ALARM_RW, + NUM_8_BIT_RTC_REGS); + if (rc) { + dev_err(dev, "Write to ALARM reg failed\n"); + goto rtc_rw_fail; + } + + ctrl_reg = (alarm->enabled) ? + (rtc_dd->alarm_ctrl_reg1 | BIT_RTC_ALARM_ENABLE) : + (rtc_dd->alarm_ctrl_reg1 & ~BIT_RTC_ALARM_ENABLE); + + rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, + rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); + if (rc) { + dev_err(dev, "Write to ALARM cntrol reg failed\n"); + goto rtc_rw_fail; + } + + rtc_dd->alarm_ctrl_reg1 = 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->alarm_ctrl_lock, irq_flags); + return rc; +} + +static int +qpnp_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + int rc; + u8 value[4]; + unsigned long secs; + struct qpnp_rtc *rtc_dd = dev_get_drvdata(dev); + + rc = qpnp_read_wrapper(rtc_dd, value, + rtc_dd->alarm_base + REG_OFFSET_ALARM_RW, + NUM_8_BIT_RTC_REGS); + if (rc) { + dev_err(dev, "Read from ALARM reg failed\n"); + return rc; + } + + secs = TO_SECS(value); + rtc_time_to_tm(secs, &alarm->time); + + rc = rtc_valid_tm(&alarm->time); + if (rc) { + dev_err(dev, "Invalid 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 +qpnp_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + int rc; + unsigned long irq_flags; + struct qpnp_rtc *rtc_dd = dev_get_drvdata(dev); + u8 ctrl_reg; + u8 value[4] = {0}; + + spin_lock_irqsave(&rtc_dd->alarm_ctrl_lock, irq_flags); + ctrl_reg = rtc_dd->alarm_ctrl_reg1; + ctrl_reg = enabled ? (ctrl_reg | BIT_RTC_ALARM_ENABLE) : + (ctrl_reg & ~BIT_RTC_ALARM_ENABLE); + + rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, + rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); + if (rc) { + dev_err(dev, "Write to ALARM control reg failed\n"); + goto rtc_rw_fail; + } + + rtc_dd->alarm_ctrl_reg1 = ctrl_reg; + + /* Clear Alarm register */ + if (!enabled) { + rc = qpnp_write_wrapper(rtc_dd, value, + rtc_dd->alarm_base + REG_OFFSET_ALARM_RW, + NUM_8_BIT_RTC_REGS); + if (rc) + dev_err(dev, "Clear ALARM value reg failed\n"); + } + +rtc_rw_fail: + spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); + return rc; +} + +static struct rtc_class_ops qpnp_rtc_ops = { + .read_time = qpnp_rtc_read_time, + .set_alarm = qpnp_rtc_set_alarm, + .read_alarm = qpnp_rtc_read_alarm, + .alarm_irq_enable = qpnp_rtc_alarm_irq_enable, +}; + +static irqreturn_t qpnp_alarm_trigger(int irq, void *dev_id) +{ + struct qpnp_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->alarm_ctrl_lock, irq_flags); + + /* Clear the alarm enable bit */ + ctrl_reg = rtc_dd->alarm_ctrl_reg1; + ctrl_reg &= ~BIT_RTC_ALARM_ENABLE; + + rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, + rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); + if (rc) { + spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); + dev_err(rtc_dd->rtc_dev, + "Write to ALARM control reg failed\n"); + goto rtc_alarm_handled; + } + + rtc_dd->alarm_ctrl_reg1 = ctrl_reg; + spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); + + /* Set ALARM_CLR bit */ + ctrl_reg = 0x1; + rc = qpnp_write_wrapper(rtc_dd, &ctrl_reg, + rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL2, 1); + if (rc) + dev_err(rtc_dd->rtc_dev, + "Write to ALARM control reg failed\n"); + +rtc_alarm_handled: + return IRQ_HANDLED; +} + +static int qpnp_rtc_probe(struct spmi_device *spmi) +{ + int rc; + u8 subtype; + struct qpnp_rtc *rtc_dd; + struct resource *resource; + struct spmi_resource *spmi_resource; + + rtc_dd = devm_kzalloc(&spmi->dev, sizeof(*rtc_dd), GFP_KERNEL); + if (rtc_dd == NULL) { + dev_err(&spmi->dev, "Unable to allocate memory!\n"); + return -ENOMEM; + } + + /* Get the rtc write property */ + rc = of_property_read_u32(spmi->dev.of_node, "qcom,qpnp-rtc-write", + &rtc_dd->rtc_write_enable); + if (rc && rc != -EINVAL) { + dev_err(&spmi->dev, + "Error reading rtc_write_enable property %d\n", rc); + return rc; + } + + rc = of_property_read_u32(spmi->dev.of_node, + "qcom,qpnp-rtc-alarm-pwrup", + &rtc_dd->rtc_alarm_powerup); + if (rc && rc != -EINVAL) { + dev_err(&spmi->dev, + "Error reading rtc_alarm_powerup property %d\n", rc); + return rc; + } + + /* Initialise spinlock to protect RTC control register */ + spin_lock_init(&rtc_dd->alarm_ctrl_lock); + + rtc_dd->rtc_dev = &(spmi->dev); + rtc_dd->spmi = spmi; + + /* Get RTC/ALARM resources */ + spmi_for_each_container_dev(spmi_resource, spmi) { + if (!spmi_resource) { + dev_err(&spmi->dev, + "%s: rtc_alarm: spmi resource absent!\n", + __func__); + rc = -ENXIO; + goto fail_rtc_enable; + } + + resource = spmi_get_resource(spmi, spmi_resource, + IORESOURCE_MEM, 0); + if (!(resource && resource->start)) { + dev_err(&spmi->dev, + "%s: node %s IO resource absent!\n", + __func__, spmi->dev.of_node->full_name); + rc = -ENXIO; + goto fail_rtc_enable; + } + + rc = qpnp_read_wrapper(rtc_dd, &subtype, + resource->start + REG_OFFSET_PERP_SUBTYPE, 1); + if (rc) { + dev_err(&spmi->dev, + "Peripheral subtype read failed\n"); + goto fail_rtc_enable; + } + + switch (subtype) { + case RTC_PERPH_SUBTYPE: + rtc_dd->rtc_base = resource->start; + break; + case ALARM_PERPH_SUBTYPE: + rtc_dd->alarm_base = resource->start; + rtc_dd->rtc_alarm_irq = + spmi_get_irq(spmi, spmi_resource, 0); + if (rtc_dd->rtc_alarm_irq < 0) { + dev_err(&spmi->dev, "ALARM IRQ absent\n"); + rc = -ENXIO; + goto fail_rtc_enable; + } + break; + default: + dev_err(&spmi->dev, "Invalid peripheral subtype\n"); + rc = -EINVAL; + goto fail_rtc_enable; + } + } + + rc = qpnp_read_wrapper(rtc_dd, &rtc_dd->rtc_ctrl_reg, + rtc_dd->rtc_base + REG_OFFSET_RTC_CTRL, 1); + if (rc) { + dev_err(&spmi->dev, + "Read from RTC control reg failed\n"); + goto fail_rtc_enable; + } + + if (!(rtc_dd->rtc_ctrl_reg & BIT_RTC_ENABLE)) { + dev_err(&spmi->dev, + "RTC h/w disabled, rtc not registered\n"); + goto fail_rtc_enable; + } + + rc = qpnp_read_wrapper(rtc_dd, &rtc_dd->alarm_ctrl_reg1, + rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); + if (rc) { + dev_err(&spmi->dev, + "Read from Alarm control reg failed\n"); + goto fail_rtc_enable; + } + /* Enable abort enable feature */ + rtc_dd->alarm_ctrl_reg1 |= BIT_RTC_ABORT_ENABLE; + rc = qpnp_write_wrapper(rtc_dd, &rtc_dd->alarm_ctrl_reg1, + rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); + if (rc) { + dev_err(&spmi->dev, "SPMI write failed!\n"); + goto fail_rtc_enable; + } + + if (rtc_dd->rtc_write_enable == true) + qpnp_rtc_ops.set_time = qpnp_rtc_set_time; + + dev_set_drvdata(&spmi->dev, rtc_dd); + + /* Register the RTC device */ + rtc_dd->rtc = rtc_device_register("qpnp_rtc", &spmi->dev, + &qpnp_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc_dd->rtc)) { + dev_err(&spmi->dev, "%s: RTC registration failed (%ld)\n", + __func__, PTR_ERR(rtc_dd->rtc)); + rc = PTR_ERR(rtc_dd->rtc); + goto fail_rtc_enable; + } + + /* Init power_on_alarm after adding rtc device */ + power_on_alarm_init(); + + /* Request the alarm IRQ */ + rc = request_any_context_irq(rtc_dd->rtc_alarm_irq, + qpnp_alarm_trigger, IRQF_TRIGGER_RISING, + "qpnp_rtc_alarm", rtc_dd); + if (rc) { + dev_err(&spmi->dev, "Request IRQ failed (%d)\n", rc); + goto fail_req_irq; + } + + device_init_wakeup(&spmi->dev, 1); + enable_irq_wake(rtc_dd->rtc_alarm_irq); + + dev_dbg(&spmi->dev, "Probe success !!\n"); + + return 0; + +fail_req_irq: + rtc_device_unregister(rtc_dd->rtc); +fail_rtc_enable: + dev_set_drvdata(&spmi->dev, NULL); + + return rc; +} + +static int qpnp_rtc_remove(struct spmi_device *spmi) +{ + struct qpnp_rtc *rtc_dd = dev_get_drvdata(&spmi->dev); + + device_init_wakeup(&spmi->dev, 0); + free_irq(rtc_dd->rtc_alarm_irq, rtc_dd); + rtc_device_unregister(rtc_dd->rtc); + dev_set_drvdata(&spmi->dev, NULL); + + return 0; +} + +static void qpnp_rtc_shutdown(struct spmi_device *spmi) +{ + u8 value[4] = {0}; + u8 reg; + int rc; + unsigned long irq_flags; + struct qpnp_rtc *rtc_dd; + bool rtc_alarm_powerup; + + if (!spmi) { + pr_err("qpnp-rtc: spmi device not found\n"); + return; + } + rtc_dd = dev_get_drvdata(&spmi->dev); + if (!rtc_dd) { + pr_err("qpnp-rtc: rtc driver data not found\n"); + return; + } + rtc_alarm_powerup = rtc_dd->rtc_alarm_powerup; + if (!rtc_alarm_powerup && !poweron_alarm) { + spin_lock_irqsave(&rtc_dd->alarm_ctrl_lock, irq_flags); + dev_dbg(&spmi->dev, "Disabling alarm interrupts\n"); + + /* Disable RTC alarms */ + reg = rtc_dd->alarm_ctrl_reg1; + reg &= ~BIT_RTC_ALARM_ENABLE; + rc = qpnp_write_wrapper(rtc_dd, ®, + rtc_dd->alarm_base + REG_OFFSET_ALARM_CTRL1, 1); + if (rc) { + dev_err(rtc_dd->rtc_dev, "SPMI write failed\n"); + goto fail_alarm_disable; + } + + /* Clear Alarm register */ + rc = qpnp_write_wrapper(rtc_dd, value, + rtc_dd->alarm_base + REG_OFFSET_ALARM_RW, + NUM_8_BIT_RTC_REGS); + if (rc) + dev_err(rtc_dd->rtc_dev, "SPMI write failed\n"); + +fail_alarm_disable: + spin_unlock_irqrestore(&rtc_dd->alarm_ctrl_lock, irq_flags); + } +} + +static struct of_device_id spmi_match_table[] = { + { + .compatible = "qcom,qpnp-rtc", + }, + {} +}; + +static struct spmi_driver qpnp_rtc_driver = { + .probe = qpnp_rtc_probe, + .remove = qpnp_rtc_remove, + .shutdown = qpnp_rtc_shutdown, + .driver = { + .name = "qcom,qpnp-rtc", + .owner = THIS_MODULE, + .of_match_table = spmi_match_table, + }, +}; + +static int __init qpnp_rtc_init(void) +{ + return spmi_driver_register(&qpnp_rtc_driver); +} +module_init(qpnp_rtc_init); + +static void __exit qpnp_rtc_exit(void) +{ + spmi_driver_unregister(&qpnp_rtc_driver); +} +module_exit(qpnp_rtc_exit); + +MODULE_DESCRIPTION("SMPI PMIC RTC driver"); +MODULE_LICENSE("GPL V2"); |