From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- drivers/rtc/rtc-goldfish.c | 207 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 207 insertions(+) create mode 100644 drivers/rtc/rtc-goldfish.c (limited to 'drivers/rtc/rtc-goldfish.c') diff --git a/drivers/rtc/rtc-goldfish.c b/drivers/rtc/rtc-goldfish.c new file mode 100644 index 000000000..53ec7173c --- /dev/null +++ b/drivers/rtc/rtc-goldfish.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: GPL-2.0 +/* drivers/rtc/rtc-goldfish.c + * + * Copyright (C) 2007 Google, Inc. + * Copyright (C) 2017 Imagination Technologies Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include + +struct goldfish_rtc { + void __iomem *base; + int irq; + struct rtc_device *rtc; +}; + +static int goldfish_rtc_read_alarm(struct device *dev, + struct rtc_wkalrm *alrm) +{ + u64 rtc_alarm; + u64 rtc_alarm_low; + u64 rtc_alarm_high; + void __iomem *base; + struct goldfish_rtc *rtcdrv; + + rtcdrv = dev_get_drvdata(dev); + base = rtcdrv->base; + + rtc_alarm_low = gf_ioread32(base + TIMER_ALARM_LOW); + rtc_alarm_high = gf_ioread32(base + TIMER_ALARM_HIGH); + rtc_alarm = (rtc_alarm_high << 32) | rtc_alarm_low; + + do_div(rtc_alarm, NSEC_PER_SEC); + memset(alrm, 0, sizeof(struct rtc_wkalrm)); + + rtc_time64_to_tm(rtc_alarm, &alrm->time); + + if (gf_ioread32(base + TIMER_ALARM_STATUS)) + alrm->enabled = 1; + else + alrm->enabled = 0; + + return 0; +} + +static int goldfish_rtc_set_alarm(struct device *dev, + struct rtc_wkalrm *alrm) +{ + struct goldfish_rtc *rtcdrv; + u64 rtc_alarm64; + u64 rtc_status_reg; + void __iomem *base; + + rtcdrv = dev_get_drvdata(dev); + base = rtcdrv->base; + + if (alrm->enabled) { + rtc_alarm64 = rtc_tm_to_time64(&alrm->time) * NSEC_PER_SEC; + gf_iowrite32((rtc_alarm64 >> 32), base + TIMER_ALARM_HIGH); + gf_iowrite32(rtc_alarm64, base + TIMER_ALARM_LOW); + gf_iowrite32(1, base + TIMER_IRQ_ENABLED); + } else { + /* + * if this function was called with enabled=0 + * then it could mean that the application is + * trying to cancel an ongoing alarm + */ + rtc_status_reg = gf_ioread32(base + TIMER_ALARM_STATUS); + if (rtc_status_reg) + gf_iowrite32(1, base + TIMER_CLEAR_ALARM); + } + + return 0; +} + +static int goldfish_rtc_alarm_irq_enable(struct device *dev, + unsigned int enabled) +{ + void __iomem *base; + struct goldfish_rtc *rtcdrv; + + rtcdrv = dev_get_drvdata(dev); + base = rtcdrv->base; + + if (enabled) + gf_iowrite32(1, base + TIMER_IRQ_ENABLED); + else + gf_iowrite32(0, base + TIMER_IRQ_ENABLED); + + return 0; +} + +static irqreturn_t goldfish_rtc_interrupt(int irq, void *dev_id) +{ + struct goldfish_rtc *rtcdrv = dev_id; + void __iomem *base = rtcdrv->base; + + gf_iowrite32(1, base + TIMER_CLEAR_INTERRUPT); + + rtc_update_irq(rtcdrv->rtc, 1, RTC_IRQF | RTC_AF); + + return IRQ_HANDLED; +} + +static int goldfish_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct goldfish_rtc *rtcdrv; + void __iomem *base; + u64 time_high; + u64 time_low; + u64 time; + + rtcdrv = dev_get_drvdata(dev); + base = rtcdrv->base; + + time_low = gf_ioread32(base + TIMER_TIME_LOW); + time_high = gf_ioread32(base + TIMER_TIME_HIGH); + time = (time_high << 32) | time_low; + + do_div(time, NSEC_PER_SEC); + + rtc_time64_to_tm(time, tm); + + return 0; +} + +static int goldfish_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct goldfish_rtc *rtcdrv; + void __iomem *base; + u64 now64; + + rtcdrv = dev_get_drvdata(dev); + base = rtcdrv->base; + + now64 = rtc_tm_to_time64(tm) * NSEC_PER_SEC; + gf_iowrite32((now64 >> 32), base + TIMER_TIME_HIGH); + gf_iowrite32(now64, base + TIMER_TIME_LOW); + + return 0; +} + +static const struct rtc_class_ops goldfish_rtc_ops = { + .read_time = goldfish_rtc_read_time, + .set_time = goldfish_rtc_set_time, + .read_alarm = goldfish_rtc_read_alarm, + .set_alarm = goldfish_rtc_set_alarm, + .alarm_irq_enable = goldfish_rtc_alarm_irq_enable +}; + +static int goldfish_rtc_probe(struct platform_device *pdev) +{ + struct goldfish_rtc *rtcdrv; + int err; + + rtcdrv = devm_kzalloc(&pdev->dev, sizeof(*rtcdrv), GFP_KERNEL); + if (!rtcdrv) + return -ENOMEM; + + platform_set_drvdata(pdev, rtcdrv); + rtcdrv->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(rtcdrv->base)) + return PTR_ERR(rtcdrv->base); + + rtcdrv->irq = platform_get_irq(pdev, 0); + if (rtcdrv->irq < 0) + return -ENODEV; + + rtcdrv->rtc = devm_rtc_allocate_device(&pdev->dev); + if (IS_ERR(rtcdrv->rtc)) + return PTR_ERR(rtcdrv->rtc); + + rtcdrv->rtc->ops = &goldfish_rtc_ops; + rtcdrv->rtc->range_max = U64_MAX / NSEC_PER_SEC; + + err = devm_request_irq(&pdev->dev, rtcdrv->irq, + goldfish_rtc_interrupt, + 0, pdev->name, rtcdrv); + if (err) + return err; + + return devm_rtc_register_device(rtcdrv->rtc); +} + +static const struct of_device_id goldfish_rtc_of_match[] = { + { .compatible = "google,goldfish-rtc", }, + {}, +}; +MODULE_DEVICE_TABLE(of, goldfish_rtc_of_match); + +static struct platform_driver goldfish_rtc = { + .probe = goldfish_rtc_probe, + .driver = { + .name = "goldfish_rtc", + .of_match_table = goldfish_rtc_of_match, + } +}; + +module_platform_driver(goldfish_rtc); + +MODULE_DESCRIPTION("Android Goldfish Real Time Clock driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.3.1