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hw/timer/cmsdk-apb-timer: Add Clock input

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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 <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20210128114145.20536-8-peter.maydell@linaro.org
Message-id: 20210121190622.22000-8-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2021-01-28 11:41:27 +00:00
parent b56d351e25
commit 7cc378edee
2 changed files with 14 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

9
include/hw/timer/cmsdk-apb-timer.h
View file

@ -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;