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hw/misc/pca9552: Model qdev output GPIOs 

The PCA9552 has 16 GPIOs which can be used as input,
output or PWM mode. QEMU models the output GPIO with
the qemu_irq type. Let the device expose the 16 GPIOs
to allow us to later connect LEDs to these outputs.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20200623072723.6324-10-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2020-06-23 09:27:23 +02:00 committed by Peter Maydell
parent d82ab2931d
commit 586f495b1e
2 changed files with 7 additions and 0 deletions
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6
hw/misc/pca9552.c
View File

@ -17,6 +17,7 @@
#include "hw/qdev-properties.h"
#include "hw/misc/pca9552.h"
#include "hw/misc/pca9552_regs.h"
#include "hw/irq.h"
#include "migration/vmstate.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
@ -111,9 +112,11 @@ static void pca955x_update_pin_input(PCA955xState *s)
switch (config) {
case PCA9552_LED_ON:
qemu_set_irq(s->gpio[i], 1);
s->regs[input_reg] |= 1 << input_shift;
break;
case PCA9552_LED_OFF:
qemu_set_irq(s->gpio[i], 0);
s->regs[input_reg] &= ~(1 << input_shift);
break;
case PCA9552_LED_PWM0:
@ -374,11 +377,14 @@ static void pca955x_initfn(Object *obj)
static void pca955x_realize(DeviceState *dev, Error **errp)
{
PCA955xClass *k = PCA955X_GET_CLASS(dev);
PCA955xState *s = PCA955X(dev);
if (!s->description) {
s->description = g_strdup("pca-unspecified");
}
qdev_init_gpio_out(dev, s->gpio, k->pin_count);
}
static Property pca955x_properties[] = {

1
include/hw/misc/pca9552.h
View File

@ -27,6 +27,7 @@ typedef struct PCA955xState {
uint8_t pointer;
uint8_t regs[PCA955X_NR_REGS];
qemu_irq gpio[PCA955X_PIN_COUNT_MAX];
char *description; /* For debugging purpose only */
} PCA955xState;