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/clocksource/timer-ralink.c | 157 +++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 drivers/clocksource/timer-ralink.c (limited to 'drivers/clocksource/timer-ralink.c') diff --git a/drivers/clocksource/timer-ralink.c b/drivers/clocksource/timer-ralink.c new file mode 100644 index 000000000..68434d9ed --- /dev/null +++ b/drivers/clocksource/timer-ralink.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Ralink System Tick Counter driver present on RT3352 and MT7620 SoCs. + * + * Copyright (C) 2013 by John Crispin + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SYSTICK_FREQ (50 * 1000) + +#define SYSTICK_CONFIG 0x00 +#define SYSTICK_COMPARE 0x04 +#define SYSTICK_COUNT 0x08 + +/* route systick irq to mips irq 7 instead of the r4k-timer */ +#define CFG_EXT_STK_EN 0x2 +/* enable the counter */ +#define CFG_CNT_EN 0x1 + +struct systick_device { + void __iomem *membase; + struct clock_event_device dev; + int irq_requested; + int freq_scale; +}; + +static int systick_set_oneshot(struct clock_event_device *evt); +static int systick_shutdown(struct clock_event_device *evt); + +static int systick_next_event(unsigned long delta, + struct clock_event_device *evt) +{ + struct systick_device *sdev; + u32 count; + + sdev = container_of(evt, struct systick_device, dev); + count = ioread32(sdev->membase + SYSTICK_COUNT); + count = (count + delta) % SYSTICK_FREQ; + iowrite32(count, sdev->membase + SYSTICK_COMPARE); + + return 0; +} + +static void systick_event_handler(struct clock_event_device *dev) +{ + /* noting to do here */ +} + +static irqreturn_t systick_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *dev = (struct clock_event_device *)dev_id; + + dev->event_handler(dev); + + return IRQ_HANDLED; +} + +static struct systick_device systick = { + .dev = { + /* + * cevt-r4k uses 300, make sure systick + * gets used if available + */ + .rating = 310, + .features = CLOCK_EVT_FEAT_ONESHOT, + .set_next_event = systick_next_event, + .set_state_shutdown = systick_shutdown, + .set_state_oneshot = systick_set_oneshot, + .event_handler = systick_event_handler, + }, +}; + +static int systick_shutdown(struct clock_event_device *evt) +{ + struct systick_device *sdev; + + sdev = container_of(evt, struct systick_device, dev); + + if (sdev->irq_requested) + free_irq(systick.dev.irq, &systick.dev); + sdev->irq_requested = 0; + iowrite32(0, systick.membase + SYSTICK_CONFIG); + + return 0; +} + +static int systick_set_oneshot(struct clock_event_device *evt) +{ + const char *name = systick.dev.name; + struct systick_device *sdev; + int irq = systick.dev.irq; + + sdev = container_of(evt, struct systick_device, dev); + + if (!sdev->irq_requested) { + if (request_irq(irq, systick_interrupt, + IRQF_PERCPU | IRQF_TIMER, name, &systick.dev)) + pr_err("Failed to request irq %d (%s)\n", irq, name); + } + sdev->irq_requested = 1; + iowrite32(CFG_EXT_STK_EN | CFG_CNT_EN, + systick.membase + SYSTICK_CONFIG); + + return 0; +} + +static int __init ralink_systick_init(struct device_node *np) +{ + int ret; + + systick.membase = of_iomap(np, 0); + if (!systick.membase) + return -ENXIO; + + systick.dev.name = np->name; + clockevents_calc_mult_shift(&systick.dev, SYSTICK_FREQ, 60); + systick.dev.max_delta_ns = clockevent_delta2ns(0x7fff, &systick.dev); + systick.dev.max_delta_ticks = 0x7fff; + systick.dev.min_delta_ns = clockevent_delta2ns(0x3, &systick.dev); + systick.dev.min_delta_ticks = 0x3; + systick.dev.irq = irq_of_parse_and_map(np, 0); + if (!systick.dev.irq) { + pr_err("%pOFn: request_irq failed", np); + ret = -EINVAL; + goto err_iounmap; + } + + ret = clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name, + SYSTICK_FREQ, 301, 16, + clocksource_mmio_readl_up); + if (ret) + goto err_free_irq; + + clockevents_register_device(&systick.dev); + + pr_info("%pOFn: running - mult: %d, shift: %d\n", + np, systick.dev.mult, systick.dev.shift); + + return 0; + +err_free_irq: + irq_dispose_mapping(systick.dev.irq); +err_iounmap: + iounmap(systick.membase); + return ret; +} + +TIMER_OF_DECLARE(systick, "ralink,cevt-systick", ralink_systick_init); -- cgit v1.3.1