Re: [PATCH 06/24] hw/misc/mps2-fpgaio: Support SWITCH register

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

On 2/12/21 2:45 PM, Peter Maydell wrote:
> On Fri, 5 Feb 2021 at 17:00, Peter Maydell <peter.maydell@linaro.org> wrote:
>>
>> MPS3 boards have an extra SWITCH register in the FPGAIO block which
>> reports the value of some switches.  Implement this, governed by a
>> property the board code can use to specify whether whether it exists.
>>
>> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
>> ---
>>  include/hw/misc/mps2-fpgaio.h |  1 +
>>  hw/misc/mps2-fpgaio.c         | 10 ++++++++++
>>  2 files changed, 11 insertions(+)
> 
> I changed my mind about the property/struct field name here, I think
> "has" is what we tend to use rather than "have". Trivial change
> to squash into this patch:

What about "use-switches"?

use-x: 12 occurences
has-x: 9.

Is there a difference in the meaning? Maybe have refers to
something internal, while use to something external?

$ git grep -F 'DEFINE_PROP_BOOL("use-'
hw/audio/hda-codec.c:848:    DEFINE_PROP_BOOL("use-timer",
HDAAudioState, use_timer,  true),
hw/block/nvme.c:4556:    DEFINE_PROP_BOOL("use-intel-id", NvmeCtrl,
params.use_intel_id, false),
hw/intc/ppc-uic.c:278:    DEFINE_PROP_BOOL("use-vectors", PPCUIC,
use_vectors, true),
hw/ppc/spapr_rng.c:135:    DEFINE_PROP_BOOL("use-kvm", SpaprRngState,
use_kvm, false),
hw/virtio/virtio.c:3722:    DEFINE_PROP_BOOL("use-started",
VirtIODevice, use_started, true),
hw/virtio/virtio.c:3723:    DEFINE_PROP_BOOL("use-disabled-flag",
VirtIODevice, use_disabled_flag, true),
target/microblaze/cpu.c:292:    DEFINE_PROP_BOOL("use-stack-protection",
MicroBlazeCPU, cfg.stackprot,
target/microblaze/cpu.c:311:    DEFINE_PROP_BOOL("use-barrel",
MicroBlazeCPU, cfg.use_barrel, true),
target/microblaze/cpu.c:312:    DEFINE_PROP_BOOL("use-div",
MicroBlazeCPU, cfg.use_div, true),
target/microblaze/cpu.c:313:    DEFINE_PROP_BOOL("use-msr-instr",
MicroBlazeCPU, cfg.use_msr_instr, true),
target/microblaze/cpu.c:314:    DEFINE_PROP_BOOL("use-pcmp-instr",
MicroBlazeCPU, cfg.use_pcmp_instr, true),
target/microblaze/cpu.c:315:    DEFINE_PROP_BOOL("use-mmu",
MicroBlazeCPU, cfg.use_mmu, true),

$ git grep -F 'DEFINE_PROP_BOOL("has-'
hw/gpio/imx_gpio.c:295:    DEFINE_PROP_BOOL("has-edge-sel",
IMXGPIOState, has_edge_sel, true),
hw/gpio/imx_gpio.c:296:    DEFINE_PROP_BOOL("has-upper-pin-irq",
IMXGPIOState, has_upper_pin_irq,
hw/intc/arm_gic_common.c:357:
DEFINE_PROP_BOOL("has-security-extensions", GICState, security_extn, 0),
hw/intc/arm_gic_common.c:359:
DEFINE_PROP_BOOL("has-virtualization-extensions", GICState, virt_extn, 0),
hw/intc/arm_gicv3_common.c:497:
DEFINE_PROP_BOOL("has-security-extensions", GICv3State, security_extn, 0),
hw/misc/macio/macio.c:430:    DEFINE_PROP_BOOL("has-pmu",
NewWorldMacIOState, has_pmu, false),
hw/misc/macio/macio.c:431:    DEFINE_PROP_BOOL("has-adb",
NewWorldMacIOState, has_adb, false),
hw/misc/macio/pmu.c:782:    DEFINE_PROP_BOOL("has-adb", PMUState,
has_adb, true),
target/arm/cpu.c:1110:            DEFINE_PROP_BOOL("has-mpu", ARMCPU,
has_mpu, true);