| /* |
| * SuperH On-Chip RTC Support |
| * |
| * Copyright (C) 2006 - 2009 Paul Mundt |
| * Copyright (C) 2006 Jamie Lenehan |
| * Copyright (C) 2008 Angelo Castello |
| * |
| * Based on the old arch/sh/kernel/cpu/rtc.c by: |
| * |
| * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org> |
| * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka |
| * |
| * 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. |
| */ |
| #include <linux/module.h> |
| #include <linux/mod_devicetable.h> |
| #include <linux/kernel.h> |
| #include <linux/bcd.h> |
| #include <linux/rtc.h> |
| #include <linux/init.h> |
| #include <linux/platform_device.h> |
| #include <linux/seq_file.h> |
| #include <linux/interrupt.h> |
| #include <linux/spinlock.h> |
| #include <linux/io.h> |
| #include <linux/log2.h> |
| #include <linux/clk.h> |
| #include <linux/slab.h> |
| #ifdef CONFIG_SUPERH |
| #include <asm/rtc.h> |
| #else |
| /* Default values for RZ/A RTC */ |
| #define rtc_reg_size sizeof(u16) |
| #define RTC_BIT_INVERTED 0 /* no chip bugs */ |
| #define RTC_CAP_4_DIGIT_YEAR (1 << 0) |
| #define RTC_DEF_CAPABILITIES RTC_CAP_4_DIGIT_YEAR |
| #endif |
| |
| #define DRV_NAME "sh-rtc" |
| |
| #define RTC_REG(r) ((r) * rtc_reg_size) |
| |
| #define R64CNT RTC_REG(0) |
| |
| #define RSECCNT RTC_REG(1) /* RTC sec */ |
| #define RMINCNT RTC_REG(2) /* RTC min */ |
| #define RHRCNT RTC_REG(3) /* RTC hour */ |
| #define RWKCNT RTC_REG(4) /* RTC week */ |
| #define RDAYCNT RTC_REG(5) /* RTC day */ |
| #define RMONCNT RTC_REG(6) /* RTC month */ |
| #define RYRCNT RTC_REG(7) /* RTC year */ |
| #define RSECAR RTC_REG(8) /* ALARM sec */ |
| #define RMINAR RTC_REG(9) /* ALARM min */ |
| #define RHRAR RTC_REG(10) /* ALARM hour */ |
| #define RWKAR RTC_REG(11) /* ALARM week */ |
| #define RDAYAR RTC_REG(12) /* ALARM day */ |
| #define RMONAR RTC_REG(13) /* ALARM month */ |
| #define RCR1 RTC_REG(14) /* Control */ |
| #define RCR2 RTC_REG(15) /* Control */ |
| |
| /* |
| * Note on RYRAR and RCR3: Up until this point most of the register |
| * definitions are consistent across all of the available parts. However, |
| * the placement of the optional RYRAR and RCR3 (the RYRAR control |
| * register used to control RYRCNT/RYRAR compare) varies considerably |
| * across various parts, occasionally being mapped in to a completely |
| * unrelated address space. For proper RYRAR support a separate resource |
| * would have to be handed off, but as this is purely optional in |
| * practice, we simply opt not to support it, thereby keeping the code |
| * quite a bit more simplified. |
| */ |
| |
| /* ALARM Bits - or with BCD encoded value */ |
| #define AR_ENB 0x80 /* Enable for alarm cmp */ |
| |
| /* Period Bits */ |
| #define PF_HP 0x100 /* Enable Half Period to support 8,32,128Hz */ |
| #define PF_COUNT 0x200 /* Half periodic counter */ |
| #define PF_OXS 0x400 /* Periodic One x Second */ |
| #define PF_KOU 0x800 /* Kernel or User periodic request 1=kernel */ |
| #define PF_MASK 0xf00 |
| |
| /* RCR1 Bits */ |
| #define RCR1_CF 0x80 /* Carry Flag */ |
| #define RCR1_CIE 0x10 /* Carry Interrupt Enable */ |
| #define RCR1_AIE 0x08 /* Alarm Interrupt Enable */ |
| #define RCR1_AF 0x01 /* Alarm Flag */ |
| |
| /* RCR2 Bits */ |
| #define RCR2_PEF 0x80 /* PEriodic interrupt Flag */ |
| #define RCR2_PESMASK 0x70 /* Periodic interrupt Set */ |
| #define RCR2_RTCEN 0x08 /* ENable RTC */ |
| #define RCR2_ADJ 0x04 /* ADJustment (30-second) */ |
| #define RCR2_RESET 0x02 /* Reset bit */ |
| #define RCR2_START 0x01 /* Start bit */ |
| |
| struct sh_rtc { |
| void __iomem *regbase; |
| unsigned long regsize; |
| struct resource *res; |
| int alarm_irq; |
| int periodic_irq; |
| int carry_irq; |
| struct clk *clk; |
| struct rtc_device *rtc_dev; |
| spinlock_t lock; |
| unsigned long capabilities; /* See asm/rtc.h for cap bits */ |
| unsigned short periodic_freq; |
| }; |
| |
| static int __sh_rtc_interrupt(struct sh_rtc *rtc) |
| { |
| unsigned int tmp, pending; |
| |
| tmp = readb(rtc->regbase + RCR1); |
| pending = tmp & RCR1_CF; |
| tmp &= ~RCR1_CF; |
| writeb(tmp, rtc->regbase + RCR1); |
| |
| /* Users have requested One x Second IRQ */ |
| if (pending && rtc->periodic_freq & PF_OXS) |
| rtc_update_irq(rtc->rtc_dev, 1, RTC_UF | RTC_IRQF); |
| |
| return pending; |
| } |
| |
| static int __sh_rtc_alarm(struct sh_rtc *rtc) |
| { |
| unsigned int tmp, pending; |
| |
| tmp = readb(rtc->regbase + RCR1); |
| pending = tmp & RCR1_AF; |
| tmp &= ~(RCR1_AF | RCR1_AIE); |
| writeb(tmp, rtc->regbase + RCR1); |
| |
| if (pending) |
| rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF); |
| |
| return pending; |
| } |
| |
| static int __sh_rtc_periodic(struct sh_rtc *rtc) |
| { |
| unsigned int tmp, pending; |
| |
| tmp = readb(rtc->regbase + RCR2); |
| pending = tmp & RCR2_PEF; |
| tmp &= ~RCR2_PEF; |
| writeb(tmp, rtc->regbase + RCR2); |
| |
| if (!pending) |
| return 0; |
| |
| /* Half period enabled than one skipped and the next notified */ |
| if ((rtc->periodic_freq & PF_HP) && (rtc->periodic_freq & PF_COUNT)) |
| rtc->periodic_freq &= ~PF_COUNT; |
| else { |
| if (rtc->periodic_freq & PF_HP) |
| rtc->periodic_freq |= PF_COUNT; |
| rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF); |
| } |
| |
| return pending; |
| } |
| |
| static irqreturn_t sh_rtc_interrupt(int irq, void *dev_id) |
| { |
| struct sh_rtc *rtc = dev_id; |
| int ret; |
| |
| spin_lock(&rtc->lock); |
| ret = __sh_rtc_interrupt(rtc); |
| spin_unlock(&rtc->lock); |
| |
| return IRQ_RETVAL(ret); |
| } |
| |
| static irqreturn_t sh_rtc_alarm(int irq, void *dev_id) |
| { |
| struct sh_rtc *rtc = dev_id; |
| int ret; |
| |
| spin_lock(&rtc->lock); |
| ret = __sh_rtc_alarm(rtc); |
| spin_unlock(&rtc->lock); |
| |
| return IRQ_RETVAL(ret); |
| } |
| |
| static irqreturn_t sh_rtc_periodic(int irq, void *dev_id) |
| { |
| struct sh_rtc *rtc = dev_id; |
| int ret; |
| |
| spin_lock(&rtc->lock); |
| ret = __sh_rtc_periodic(rtc); |
| spin_unlock(&rtc->lock); |
| |
| return IRQ_RETVAL(ret); |
| } |
| |
| static irqreturn_t sh_rtc_shared(int irq, void *dev_id) |
| { |
| struct sh_rtc *rtc = dev_id; |
| int ret; |
| |
| spin_lock(&rtc->lock); |
| ret = __sh_rtc_interrupt(rtc); |
| ret |= __sh_rtc_alarm(rtc); |
| ret |= __sh_rtc_periodic(rtc); |
| spin_unlock(&rtc->lock); |
| |
| return IRQ_RETVAL(ret); |
| } |
| |
| static inline void sh_rtc_setaie(struct device *dev, unsigned int enable) |
| { |
| struct sh_rtc *rtc = dev_get_drvdata(dev); |
| unsigned int tmp; |
| |
| spin_lock_irq(&rtc->lock); |
| |
| tmp = readb(rtc->regbase + RCR1); |
| |
| if (enable) |
| tmp |= RCR1_AIE; |
| else |
| tmp &= ~RCR1_AIE; |
| |
| writeb(tmp, rtc->regbase + RCR1); |
| |
| spin_unlock_irq(&rtc->lock); |
| } |
| |
| static int sh_rtc_proc(struct device *dev, struct seq_file *seq) |
| { |
| struct sh_rtc *rtc = dev_get_drvdata(dev); |
| unsigned int tmp; |
| |
| tmp = readb(rtc->regbase + RCR1); |
| seq_printf(seq, "carry_IRQ\t: %s\n", (tmp & RCR1_CIE) ? "yes" : "no"); |
| |
| tmp = readb(rtc->regbase + RCR2); |
| seq_printf(seq, "periodic_IRQ\t: %s\n", |
| (tmp & RCR2_PESMASK) ? "yes" : "no"); |
| |
| return 0; |
| } |
| |
| static inline void sh_rtc_setcie(struct device *dev, unsigned int enable) |
| { |
| struct sh_rtc *rtc = dev_get_drvdata(dev); |
| unsigned int tmp; |
| |
| spin_lock_irq(&rtc->lock); |
| |
| tmp = readb(rtc->regbase + RCR1); |
| |
| if (!enable) |
| tmp &= ~RCR1_CIE; |
| else |
| tmp |= RCR1_CIE; |
| |
| writeb(tmp, rtc->regbase + RCR1); |
| |
| spin_unlock_irq(&rtc->lock); |
| } |
| |
| static int sh_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) |
| { |
| sh_rtc_setaie(dev, enabled); |
| return 0; |
| } |
| |
| static int sh_rtc_read_time(struct device *dev, struct rtc_time *tm) |
| { |
| struct sh_rtc *rtc = dev_get_drvdata(dev); |
| unsigned int sec128, sec2, yr, yr100, cf_bit; |
| |
| do { |
| unsigned int tmp; |
| |
| spin_lock_irq(&rtc->lock); |
| |
| tmp = readb(rtc->regbase + RCR1); |
| tmp &= ~RCR1_CF; /* Clear CF-bit */ |
| tmp |= RCR1_CIE; |
| writeb(tmp, rtc->regbase + RCR1); |
| |
| sec128 = readb(rtc->regbase + R64CNT); |
| |
| tm->tm_sec = bcd2bin(readb(rtc->regbase + RSECCNT)); |
| tm->tm_min = bcd2bin(readb(rtc->regbase + RMINCNT)); |
| tm->tm_hour = bcd2bin(readb(rtc->regbase + RHRCNT)); |
| tm->tm_wday = bcd2bin(readb(rtc->regbase + RWKCNT)); |
| tm->tm_mday = bcd2bin(readb(rtc->regbase + RDAYCNT)); |
| tm->tm_mon = bcd2bin(readb(rtc->regbase + RMONCNT)) - 1; |
| |
| if (rtc->capabilities & RTC_CAP_4_DIGIT_YEAR) { |
| yr = readw(rtc->regbase + RYRCNT); |
| yr100 = bcd2bin(yr >> 8); |
| yr &= 0xff; |
| } else { |
| yr = readb(rtc->regbase + RYRCNT); |
| yr100 = bcd2bin((yr == 0x99) ? 0x19 : 0x20); |
| } |
| |
| tm->tm_year = (yr100 * 100 + bcd2bin(yr)) - 1900; |
| |
| sec2 = readb(rtc->regbase + R64CNT); |
| cf_bit = readb(rtc->regbase + RCR1) & RCR1_CF; |
| |
| spin_unlock_irq(&rtc->lock); |
| } while (cf_bit != 0 || ((sec128 ^ sec2) & RTC_BIT_INVERTED) != 0); |
| |
| #if RTC_BIT_INVERTED != 0 |
| if ((sec128 & RTC_BIT_INVERTED)) |
| tm->tm_sec--; |
| #endif |
| |
| /* only keep the carry interrupt enabled if UIE is on */ |
| if (!(rtc->periodic_freq & PF_OXS)) |
| sh_rtc_setcie(dev, 0); |
| |
| dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, " |
| "mday=%d, mon=%d, year=%d, wday=%d\n", |
| __func__, |
| tm->tm_sec, tm->tm_min, tm->tm_hour, |
| tm->tm_mday, tm->tm_mon + 1, tm->tm_year, tm->tm_wday); |
| |
| return 0; |
| } |
| |
| static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm) |
| { |
| struct sh_rtc *rtc = dev_get_drvdata(dev); |
| unsigned int tmp; |
| int year; |
| |
| spin_lock_irq(&rtc->lock); |
| |
| /* Reset pre-scaler & stop RTC */ |
| tmp = readb(rtc->regbase + RCR2); |
| tmp |= RCR2_RESET; |
| tmp &= ~RCR2_START; |
| writeb(tmp, rtc->regbase + RCR2); |
| |
| writeb(bin2bcd(tm->tm_sec), rtc->regbase + RSECCNT); |
| writeb(bin2bcd(tm->tm_min), rtc->regbase + RMINCNT); |
| writeb(bin2bcd(tm->tm_hour), rtc->regbase + RHRCNT); |
| writeb(bin2bcd(tm->tm_wday), rtc->regbase + RWKCNT); |
| writeb(bin2bcd(tm->tm_mday), rtc->regbase + RDAYCNT); |
| writeb(bin2bcd(tm->tm_mon + 1), rtc->regbase + RMONCNT); |
| |
| if (rtc->capabilities & RTC_CAP_4_DIGIT_YEAR) { |
| year = (bin2bcd((tm->tm_year + 1900) / 100) << 8) | |
| bin2bcd(tm->tm_year % 100); |
| writew(year, rtc->regbase + RYRCNT); |
| } else { |
| year = tm->tm_year % 100; |
| writeb(bin2bcd(year), rtc->regbase + RYRCNT); |
| } |
| |
| /* Start RTC */ |
| tmp = readb(rtc->regbase + RCR2); |
| tmp &= ~RCR2_RESET; |
| tmp |= RCR2_RTCEN | RCR2_START; |
| writeb(tmp, rtc->regbase + RCR2); |
| |
| spin_unlock_irq(&rtc->lock); |
| |
| return 0; |
| } |
| |
| static inline int sh_rtc_read_alarm_value(struct sh_rtc *rtc, int reg_off) |
| { |
| unsigned int byte; |
| int value = 0xff; /* return 0xff for ignored values */ |
| |
| byte = readb(rtc->regbase + reg_off); |
| if (byte & AR_ENB) { |
| byte &= ~AR_ENB; /* strip the enable bit */ |
| value = bcd2bin(byte); |
| } |
| |
| return value; |
| } |
| |
| static int sh_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) |
| { |
| struct sh_rtc *rtc = dev_get_drvdata(dev); |
| struct rtc_time *tm = &wkalrm->time; |
| |
| spin_lock_irq(&rtc->lock); |
| |
| tm->tm_sec = sh_rtc_read_alarm_value(rtc, RSECAR); |
| tm->tm_min = sh_rtc_read_alarm_value(rtc, RMINAR); |
| tm->tm_hour = sh_rtc_read_alarm_value(rtc, RHRAR); |
| tm->tm_wday = sh_rtc_read_alarm_value(rtc, RWKAR); |
| tm->tm_mday = sh_rtc_read_alarm_value(rtc, RDAYAR); |
| tm->tm_mon = sh_rtc_read_alarm_value(rtc, RMONAR); |
| if (tm->tm_mon > 0) |
| tm->tm_mon -= 1; /* RTC is 1-12, tm_mon is 0-11 */ |
| |
| wkalrm->enabled = (readb(rtc->regbase + RCR1) & RCR1_AIE) ? 1 : 0; |
| |
| spin_unlock_irq(&rtc->lock); |
| |
| return 0; |
| } |
| |
| static inline void sh_rtc_write_alarm_value(struct sh_rtc *rtc, |
| int value, int reg_off) |
| { |
| /* < 0 for a value that is ignored */ |
| if (value < 0) |
| writeb(0, rtc->regbase + reg_off); |
| else |
| writeb(bin2bcd(value) | AR_ENB, rtc->regbase + reg_off); |
| } |
| |
| static int sh_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) |
| { |
| struct sh_rtc *rtc = dev_get_drvdata(dev); |
| unsigned int rcr1; |
| struct rtc_time *tm = &wkalrm->time; |
| int mon; |
| |
| spin_lock_irq(&rtc->lock); |
| |
| /* disable alarm interrupt and clear the alarm flag */ |
| rcr1 = readb(rtc->regbase + RCR1); |
| rcr1 &= ~(RCR1_AF | RCR1_AIE); |
| writeb(rcr1, rtc->regbase + RCR1); |
| |
| /* set alarm time */ |
| sh_rtc_write_alarm_value(rtc, tm->tm_sec, RSECAR); |
| sh_rtc_write_alarm_value(rtc, tm->tm_min, RMINAR); |
| sh_rtc_write_alarm_value(rtc, tm->tm_hour, RHRAR); |
| sh_rtc_write_alarm_value(rtc, tm->tm_wday, RWKAR); |
| sh_rtc_write_alarm_value(rtc, tm->tm_mday, RDAYAR); |
| mon = tm->tm_mon; |
| if (mon >= 0) |
| mon += 1; |
| sh_rtc_write_alarm_value(rtc, mon, RMONAR); |
| |
| if (wkalrm->enabled) { |
| rcr1 |= RCR1_AIE; |
| writeb(rcr1, rtc->regbase + RCR1); |
| } |
| |
| spin_unlock_irq(&rtc->lock); |
| |
| return 0; |
| } |
| |
| static const struct rtc_class_ops sh_rtc_ops = { |
| .read_time = sh_rtc_read_time, |
| .set_time = sh_rtc_set_time, |
| .read_alarm = sh_rtc_read_alarm, |
| .set_alarm = sh_rtc_set_alarm, |
| .proc = sh_rtc_proc, |
| .alarm_irq_enable = sh_rtc_alarm_irq_enable, |
| }; |
| |
| static int __init sh_rtc_probe(struct platform_device *pdev) |
| { |
| struct sh_rtc *rtc; |
| struct resource *res; |
| struct rtc_time r; |
| char clk_name[6]; |
| int clk_id, ret; |
| |
| rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); |
| if (unlikely(!rtc)) |
| return -ENOMEM; |
| |
| spin_lock_init(&rtc->lock); |
| |
| /* get periodic/carry/alarm irqs */ |
| ret = platform_get_irq(pdev, 0); |
| if (unlikely(ret <= 0)) { |
| dev_err(&pdev->dev, "No IRQ resource\n"); |
| return -ENOENT; |
| } |
| |
| rtc->periodic_irq = ret; |
| rtc->carry_irq = platform_get_irq(pdev, 1); |
| rtc->alarm_irq = platform_get_irq(pdev, 2); |
| |
| res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| if (!res) |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (unlikely(res == NULL)) { |
| dev_err(&pdev->dev, "No IO resource\n"); |
| return -ENOENT; |
| } |
| |
| rtc->regsize = resource_size(res); |
| |
| rtc->res = devm_request_mem_region(&pdev->dev, res->start, |
| rtc->regsize, pdev->name); |
| if (unlikely(!rtc->res)) |
| return -EBUSY; |
| |
| rtc->regbase = devm_ioremap_nocache(&pdev->dev, rtc->res->start, |
| rtc->regsize); |
| if (unlikely(!rtc->regbase)) |
| return -EINVAL; |
| |
| if (!pdev->dev.of_node) { |
| clk_id = pdev->id; |
| /* With a single device, the clock id is still "rtc0" */ |
| if (clk_id < 0) |
| clk_id = 0; |
| |
| snprintf(clk_name, sizeof(clk_name), "rtc%d", clk_id); |
| } else |
| snprintf(clk_name, sizeof(clk_name), "fck"); |
| |
| rtc->clk = devm_clk_get(&pdev->dev, clk_name); |
| if (IS_ERR(rtc->clk)) { |
| /* |
| * No error handling for rtc->clk intentionally, not all |
| * platforms will have a unique clock for the RTC, and |
| * the clk API can handle the struct clk pointer being |
| * NULL. |
| */ |
| rtc->clk = NULL; |
| } |
| |
| clk_enable(rtc->clk); |
| |
| rtc->capabilities = RTC_DEF_CAPABILITIES; |
| |
| #ifdef CONFIG_SUPERH |
| if (dev_get_platdata(&pdev->dev)) { |
| struct sh_rtc_platform_info *pinfo = |
| dev_get_platdata(&pdev->dev); |
| |
| /* |
| * Some CPUs have special capabilities in addition to the |
| * default set. Add those in here. |
| */ |
| rtc->capabilities |= pinfo->capabilities; |
| } |
| #endif |
| |
| if (rtc->carry_irq <= 0) { |
| /* register shared periodic/carry/alarm irq */ |
| ret = devm_request_irq(&pdev->dev, rtc->periodic_irq, |
| sh_rtc_shared, 0, "sh-rtc", rtc); |
| if (unlikely(ret)) { |
| dev_err(&pdev->dev, |
| "request IRQ failed with %d, IRQ %d\n", ret, |
| rtc->periodic_irq); |
| goto err_unmap; |
| } |
| } else { |
| /* register periodic/carry/alarm irqs */ |
| ret = devm_request_irq(&pdev->dev, rtc->periodic_irq, |
| sh_rtc_periodic, 0, "sh-rtc period", rtc); |
| if (unlikely(ret)) { |
| dev_err(&pdev->dev, |
| "request period IRQ failed with %d, IRQ %d\n", |
| ret, rtc->periodic_irq); |
| goto err_unmap; |
| } |
| |
| ret = devm_request_irq(&pdev->dev, rtc->carry_irq, |
| sh_rtc_interrupt, 0, "sh-rtc carry", rtc); |
| if (unlikely(ret)) { |
| dev_err(&pdev->dev, |
| "request carry IRQ failed with %d, IRQ %d\n", |
| ret, rtc->carry_irq); |
| goto err_unmap; |
| } |
| |
| ret = devm_request_irq(&pdev->dev, rtc->alarm_irq, |
| sh_rtc_alarm, 0, "sh-rtc alarm", rtc); |
| if (unlikely(ret)) { |
| dev_err(&pdev->dev, |
| "request alarm IRQ failed with %d, IRQ %d\n", |
| ret, rtc->alarm_irq); |
| goto err_unmap; |
| } |
| } |
| |
| platform_set_drvdata(pdev, rtc); |
| |
| /* everything disabled by default */ |
| sh_rtc_setaie(&pdev->dev, 0); |
| sh_rtc_setcie(&pdev->dev, 0); |
| |
| rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, "sh", |
| &sh_rtc_ops, THIS_MODULE); |
| if (IS_ERR(rtc->rtc_dev)) { |
| ret = PTR_ERR(rtc->rtc_dev); |
| goto err_unmap; |
| } |
| |
| rtc->rtc_dev->max_user_freq = 256; |
| |
| /* reset rtc to epoch 0 if time is invalid */ |
| if (rtc_read_time(rtc->rtc_dev, &r) < 0) { |
| rtc_time_to_tm(0, &r); |
| rtc_set_time(rtc->rtc_dev, &r); |
| } |
| |
| device_init_wakeup(&pdev->dev, 1); |
| return 0; |
| |
| err_unmap: |
| clk_disable(rtc->clk); |
| |
| return ret; |
| } |
| |
| static int __exit sh_rtc_remove(struct platform_device *pdev) |
| { |
| struct sh_rtc *rtc = platform_get_drvdata(pdev); |
| |
| sh_rtc_setaie(&pdev->dev, 0); |
| sh_rtc_setcie(&pdev->dev, 0); |
| |
| clk_disable(rtc->clk); |
| |
| return 0; |
| } |
| |
| static void sh_rtc_set_irq_wake(struct device *dev, int enabled) |
| { |
| struct sh_rtc *rtc = dev_get_drvdata(dev); |
| |
| irq_set_irq_wake(rtc->periodic_irq, enabled); |
| |
| if (rtc->carry_irq > 0) { |
| irq_set_irq_wake(rtc->carry_irq, enabled); |
| irq_set_irq_wake(rtc->alarm_irq, enabled); |
| } |
| } |
| |
| static int __maybe_unused sh_rtc_suspend(struct device *dev) |
| { |
| if (device_may_wakeup(dev)) |
| sh_rtc_set_irq_wake(dev, 1); |
| |
| return 0; |
| } |
| |
| static int __maybe_unused sh_rtc_resume(struct device *dev) |
| { |
| if (device_may_wakeup(dev)) |
| sh_rtc_set_irq_wake(dev, 0); |
| |
| return 0; |
| } |
| |
| static SIMPLE_DEV_PM_OPS(sh_rtc_pm_ops, sh_rtc_suspend, sh_rtc_resume); |
| |
| static const struct of_device_id sh_rtc_of_match[] = { |
| { .compatible = "renesas,sh-rtc", }, |
| { /* sentinel */ } |
| }; |
| MODULE_DEVICE_TABLE(of, sh_rtc_of_match); |
| |
| static struct platform_driver sh_rtc_platform_driver = { |
| .driver = { |
| .name = DRV_NAME, |
| .pm = &sh_rtc_pm_ops, |
| .of_match_table = sh_rtc_of_match, |
| }, |
| .remove = __exit_p(sh_rtc_remove), |
| }; |
| |
| module_platform_driver_probe(sh_rtc_platform_driver, sh_rtc_probe); |
| |
| MODULE_DESCRIPTION("SuperH on-chip RTC driver"); |
| MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, " |
| "Jamie Lenehan <lenehan@twibble.org>, " |
| "Angelo Castello <angelo.castello@st.com>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:" DRV_NAME); |