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-pl030.c | 174 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 174 insertions(+) create mode 100644 drivers/rtc/rtc-pl030.c (limited to 'drivers/rtc/rtc-pl030.c') diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c new file mode 100644 index 000000000..5caaa714f --- /dev/null +++ b/drivers/rtc/rtc-pl030.c @@ -0,0 +1,174 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/rtc/rtc-pl030.c + * + * Copyright (C) 2000-2001 Deep Blue Solutions Ltd. + */ +#include +#include +#include +#include +#include +#include +#include + +#define RTC_DR (0) +#define RTC_MR (4) +#define RTC_STAT (8) +#define RTC_EOI (8) +#define RTC_LR (12) +#define RTC_CR (16) +#define RTC_CR_MIE (1 << 0) + +struct pl030_rtc { + void __iomem *base; +}; + +static irqreturn_t pl030_interrupt(int irq, void *dev_id) +{ + struct pl030_rtc *rtc = dev_id; + writel(0, rtc->base + RTC_EOI); + return IRQ_HANDLED; +} + +static int pl030_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pl030_rtc *rtc = dev_get_drvdata(dev); + + rtc_time64_to_tm(readl(rtc->base + RTC_MR), &alrm->time); + return 0; +} + +static int pl030_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) +{ + struct pl030_rtc *rtc = dev_get_drvdata(dev); + + writel(rtc_tm_to_time64(&alrm->time), rtc->base + RTC_MR); + + return 0; +} + +static int pl030_read_time(struct device *dev, struct rtc_time *tm) +{ + struct pl030_rtc *rtc = dev_get_drvdata(dev); + + rtc_time64_to_tm(readl(rtc->base + RTC_DR), tm); + + return 0; +} + +/* + * Set the RTC time. Unfortunately, we can't accurately set + * the point at which the counter updates. + * + * Also, since RTC_LR is transferred to RTC_CR on next rising + * edge of the 1Hz clock, we must write the time one second + * in advance. + */ +static int pl030_set_time(struct device *dev, struct rtc_time *tm) +{ + struct pl030_rtc *rtc = dev_get_drvdata(dev); + + writel(rtc_tm_to_time64(tm) + 1, rtc->base + RTC_LR); + + return 0; +} + +static const struct rtc_class_ops pl030_ops = { + .read_time = pl030_read_time, + .set_time = pl030_set_time, + .read_alarm = pl030_read_alarm, + .set_alarm = pl030_set_alarm, +}; + +static int pl030_probe(struct amba_device *dev, const struct amba_id *id) +{ + struct pl030_rtc *rtc; + int ret; + struct rtc_device *rtc_dev; + + ret = amba_request_regions(dev, NULL); + if (ret) + goto err_req; + + rtc = devm_kzalloc(&dev->dev, sizeof(*rtc), GFP_KERNEL); + if (!rtc) { + ret = -ENOMEM; + goto err_rtc; + } + + rtc_dev = devm_rtc_allocate_device(&dev->dev); + if (IS_ERR(rtc_dev)) { + ret = PTR_ERR(rtc_dev); + goto err_rtc; + } + + rtc_dev->ops = &pl030_ops; + rtc_dev->range_max = U32_MAX; + rtc->base = ioremap(dev->res.start, resource_size(&dev->res)); + if (!rtc->base) { + ret = -ENOMEM; + goto err_rtc; + } + + __raw_writel(0, rtc->base + RTC_CR); + __raw_writel(0, rtc->base + RTC_EOI); + + amba_set_drvdata(dev, rtc); + + ret = request_irq(dev->irq[0], pl030_interrupt, 0, + "rtc-pl030", rtc); + if (ret) + goto err_irq; + + ret = devm_rtc_register_device(rtc_dev); + if (ret) + goto err_reg; + + return 0; + + err_reg: + free_irq(dev->irq[0], rtc); + err_irq: + iounmap(rtc->base); + err_rtc: + amba_release_regions(dev); + err_req: + return ret; +} + +static void pl030_remove(struct amba_device *dev) +{ + struct pl030_rtc *rtc = amba_get_drvdata(dev); + + writel(0, rtc->base + RTC_CR); + + free_irq(dev->irq[0], rtc); + iounmap(rtc->base); + amba_release_regions(dev); +} + +static const struct amba_id pl030_ids[] = { + { + .id = 0x00041030, + .mask = 0x000fffff, + }, + { 0, 0 }, +}; + +MODULE_DEVICE_TABLE(amba, pl030_ids); + +static struct amba_driver pl030_driver = { + .drv = { + .name = "rtc-pl030", + }, + .probe = pl030_probe, + .remove = pl030_remove, + .id_table = pl030_ids, +}; + +module_amba_driver(pl030_driver); + +MODULE_AUTHOR("Russell King "); +MODULE_DESCRIPTION("ARM AMBA PL030 RTC Driver"); +MODULE_LICENSE("GPL"); -- cgit v1.3.1