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[PATCH 3/3] hw/gpio: add PCA9536 i2c gpio expander
From: |
Titus Rwantare |
Subject: |
[PATCH 3/3] hw/gpio: add PCA9536 i2c gpio expander |
Date: |
Mon, 6 Feb 2023 19:49:36 +0000 |
This device has the same register layout as the pca9538, but 4 fewer
gpio pins. This commit lowers the number of pins intialised, and reuses
the pca9539 logic.
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Signed-off-by: Titus Rwantare <titusr@google.com>
---
hw/gpio/pca_i2c_gpio.c | 22 ++++++++++++++++++++++
include/hw/gpio/pca_i2c_gpio.h | 2 ++
2 files changed, 24 insertions(+)
diff --git a/hw/gpio/pca_i2c_gpio.c b/hw/gpio/pca_i2c_gpio.c
index f77d8d7e84..66dd1d3369 100644
--- a/hw/gpio/pca_i2c_gpio.c
+++ b/hw/gpio/pca_i2c_gpio.c
@@ -414,6 +414,23 @@ static void pca9538_gpio_class_init(ObjectClass *klass,
void *data)
pc->num_pins = PCA9538_NUM_PINS;
}
+static void pca9536_gpio_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
+ PCAGPIOClass *pc = PCA_I2C_GPIO_CLASS(klass);
+
+ dc->desc = "PCA9536 4-bit I/O expander";
+ dc->realize = pca_i2c_realize;
+ dc->vmsd = &vmstate_pca_i2c_gpio;
+
+ k->event = pca_i2c_event;
+ k->recv = pca9538_recv;
+ k->send = pca9538_send;
+
+ pc->num_pins = PCA9536_NUM_PINS;
+}
+
static void pca_i2c_gpio_init(Object *obj)
{
PCAGPIOState *ps = PCA_I2C_GPIO(obj);
@@ -455,6 +472,11 @@ static const TypeInfo pca_gpio_types[] = {
.parent = TYPE_PCA_I2C_GPIO,
.class_init = pca9538_gpio_class_init,
},
+ {
+ .name = TYPE_PCA9536_GPIO,
+ .parent = TYPE_PCA_I2C_GPIO,
+ .class_init = pca9536_gpio_class_init,
+ },
};
DEFINE_TYPES(pca_gpio_types);
diff --git a/include/hw/gpio/pca_i2c_gpio.h b/include/hw/gpio/pca_i2c_gpio.h
index 8cd268e8f0..3d2a88ba7b 100644
--- a/include/hw/gpio/pca_i2c_gpio.h
+++ b/include/hw/gpio/pca_i2c_gpio.h
@@ -19,6 +19,7 @@
#define PCA6416_NUM_PINS 16
#define PCA9538_NUM_PINS 8
+#define PCA9536_NUM_PINS 4
typedef struct PCAGPIOClass {
I2CSlaveClass parent;
@@ -75,5 +76,6 @@ OBJECT_DECLARE_TYPE(PCAGPIOState, PCAGPIOClass, PCA_I2C_GPIO)
#define TYPE_PCA6416_GPIO "pca6416"
#define TYPE_PCA9538_GPIO "pca9538"
+#define TYPE_PCA9536_GPIO "pca9536"
#endif
--
2.39.1.519.gcb327c4b5f-goog
- [PATCH 1/3] hw/gpio: add PCA6414 i2c GPIO expander, (continued)
- [PATCH 3/3] hw/gpio: add PCA9536 i2c gpio expander,
Titus Rwantare <=