| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Laxman Dewangan | 1459 | 93.05% | 1 | 6.25% |
| Alexandre Belloni | 55 | 3.51% | 3 | 18.75% |
| Jingoo Han | 14 | 0.89% | 3 | 18.75% |
| Dmitry Osipenko | 13 | 0.83% | 2 | 12.50% |
| Arnd Bergmann | 12 | 0.77% | 1 | 6.25% |
| Guenter Roeck | 8 | 0.51% | 1 | 6.25% |
| Uwe Kleine-König | 2 | 0.13% | 1 | 6.25% |
| Nobuhiro Iwamatsu | 2 | 0.13% | 1 | 6.25% |
| Bartosz Golaszewski | 1 | 0.06% | 1 | 6.25% |
| Sachin Kamat | 1 | 0.06% | 1 | 6.25% |
| Nicolas Chauvet | 1 | 0.06% | 1 | 6.25% |
| Total | 1568 | 16 |
// SPDX-License-Identifier: GPL-2.0-only /* * rtc-tps6586x.c: RTC driver for TI PMIC TPS6586X * * Copyright (c) 2012, NVIDIA Corporation. * * Author: Laxman Dewangan <ldewangan@nvidia.com> */ #include <linux/device.h> #include <linux/err.h> #include <linux/init.h> #include <linux/irq.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; }; 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 device *tps_dev = to_tps6586x_dev(dev); unsigned long long ticks = 0; time64_t 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; rtc_time64_to_tm(seconds, tm); return 0; } static int tps6586x_rtc_set_time(struct device *dev, struct rtc_time *tm) { struct device *tps_dev = to_tps6586x_dev(dev); unsigned long long ticks; time64_t seconds; u8 buff[5]; int ret; seconds = rtc_tm_to_time64(tm); 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 device *tps_dev = to_tps6586x_dev(dev); time64_t seconds; unsigned long ticks; unsigned long rtc_current_time; unsigned long long rticks = 0; u8 buff[3]; u8 rbuff[6]; int ret; int i; seconds = rtc_tm_to_time64(&alrm->time); 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; } 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 device *tps_dev = to_tps6586x_dev(dev); unsigned long ticks; time64_t 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; rtc_time64_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); /* 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; } device_init_wakeup(&pdev->dev, 1); platform_set_drvdata(pdev, rtc); rtc->rtc = devm_rtc_allocate_device(&pdev->dev); if (IS_ERR(rtc->rtc)) { ret = PTR_ERR(rtc->rtc); goto fail_rtc_register; } rtc->rtc->ops = &tps6586x_rtc_ops; rtc->rtc->range_max = (1ULL << 30) - 1; /* 30-bit seconds */ rtc->rtc->alarm_offset_max = ALM1_VALID_RANGE_IN_SEC; rtc->rtc->start_secs = mktime64(2009, 1, 1, 0, 0, 0); rtc->rtc->set_start_time = true; irq_set_status_flags(rtc->irq, IRQ_NOAUTOEN); ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL, tps6586x_rtc_irq, IRQF_ONESHOT, 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_rtc_register; } ret = devm_rtc_register_device(rtc->rtc); if (ret) goto fail_rtc_register; return 0; fail_rtc_register: tps6586x_update(tps_dev, RTC_CTRL, 0, RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK); return ret; }; static void tps6586x_rtc_remove(struct platform_device *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); } #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 SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_rtc_suspend, tps6586x_rtc_resume); static struct platform_driver tps6586x_rtc_driver = { .driver = { .name = "tps6586x-rtc", .pm = &tps6586x_pm_ops, }, .probe = tps6586x_rtc_probe, .remove_new = tps6586x_rtc_remove, }; module_platform_driver(tps6586x_rtc_driver); MODULE_ALIAS("platform:tps6586x-rtc"); MODULE_DESCRIPTION("TI TPS6586x RTC driver"); MODULE_AUTHOR("Laxman dewangan <ldewangan@nvidia.com>"); MODULE_LICENSE("GPL v2");
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