From 7cc378edee91c3f5c76cbb90953ba9ed2a57cb11 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Thu, 28 Jan 2021 11:41:27 +0000 Subject: [PATCH] hw/timer/cmsdk-apb-timer: Add Clock input MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit As the first step in converting the CMSDK_APB_TIMER device to the Clock framework, add a Clock input. For the moment we do nothing with this clock; we will change the behaviour from using the pclk-frq property to using the Clock once all the users of this device have been converted to wire up the Clock. Since the device doesn't already have a doc comment for its "QEMU interface", we add one including the new Clock. This is a migration compatibility break for machines mps2-an505, mps2-an521, musca-a, musca-b1. Signed-off-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Luc Michel Tested-by: Philippe Mathieu-Daudé Message-id: 20210128114145.20536-8-peter.maydell@linaro.org Message-id: 20210121190622.22000-8-peter.maydell@linaro.org --- hw/timer/cmsdk-apb-timer.c | 7 +++++-- include/hw/timer/cmsdk-apb-timer.h | 9 +++++++++ 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/hw/timer/cmsdk-apb-timer.c b/hw/timer/cmsdk-apb-timer.c index ae9c542254..c63145ff55 100644 --- a/hw/timer/cmsdk-apb-timer.c +++ b/hw/timer/cmsdk-apb-timer.c @@ -35,6 +35,7 @@ #include "hw/sysbus.h" #include "hw/irq.h" #include "hw/registerfields.h" +#include "hw/qdev-clock.h" #include "hw/timer/cmsdk-apb-timer.h" #include "migration/vmstate.h" @@ -212,6 +213,7 @@ static void cmsdk_apb_timer_init(Object *obj) s, "cmsdk-apb-timer", 0x1000); sysbus_init_mmio(sbd, &s->iomem); sysbus_init_irq(sbd, &s->timerint); + s->pclk = qdev_init_clock_in(DEVICE(s), "pclk", NULL, NULL); } static void cmsdk_apb_timer_realize(DeviceState *dev, Error **errp) @@ -236,10 +238,11 @@ static void cmsdk_apb_timer_realize(DeviceState *dev, Error **errp) static const VMStateDescription cmsdk_apb_timer_vmstate = { .name = "cmsdk-apb-timer", - .version_id = 1, - .minimum_version_id = 1, + .version_id = 2, + .minimum_version_id = 2, .fields = (VMStateField[]) { VMSTATE_PTIMER(timer, CMSDKAPBTimer), + VMSTATE_CLOCK(pclk, CMSDKAPBTimer), VMSTATE_UINT32(ctrl, CMSDKAPBTimer), VMSTATE_UINT32(value, CMSDKAPBTimer), VMSTATE_UINT32(reload, CMSDKAPBTimer), diff --git a/include/hw/timer/cmsdk-apb-timer.h b/include/hw/timer/cmsdk-apb-timer.h index baa009bb2d..fc2aa97aca 100644 --- a/include/hw/timer/cmsdk-apb-timer.h +++ b/include/hw/timer/cmsdk-apb-timer.h @@ -15,11 +15,19 @@ #include "hw/qdev-properties.h" #include "hw/sysbus.h" #include "hw/ptimer.h" +#include "hw/clock.h" #include "qom/object.h" #define TYPE_CMSDK_APB_TIMER "cmsdk-apb-timer" OBJECT_DECLARE_SIMPLE_TYPE(CMSDKAPBTimer, CMSDK_APB_TIMER) +/* + * QEMU interface: + * + QOM property "pclk-frq": frequency at which the timer is clocked + * + Clock input "pclk": clock for the timer + * + sysbus MMIO region 0: the register bank + * + sysbus IRQ 0: timer interrupt TIMERINT + */ struct CMSDKAPBTimer { /*< private >*/ SysBusDevice parent_obj; @@ -29,6 +37,7 @@ struct CMSDKAPBTimer { qemu_irq timerint; uint32_t pclk_frq; struct ptimer_state *timer; + Clock *pclk; uint32_t ctrl; uint32_t value;