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[PATCH v2 3/4] hw/gpio: add PCA9536 i2c gpio expander
From: |
Titus Rwantare |
Subject: |
[PATCH v2 3/4] hw/gpio: add PCA9536 i2c gpio expander |
Date: |
Wed, 8 Feb 2023 22:43:38 +0000 |
This device has the same register layout as the pca9538, but 4 fewer
gpio pins. This commit lowers the number of pins initialised, and reuses
the pca9538 logic.
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Signed-off-by: Titus Rwantare <titusr@google.com>
---
hw/gpio/pca_i2c_gpio.c | 18 ++++++++++++++++++
include/hw/gpio/pca_i2c_gpio.h | 2 ++
2 files changed, 20 insertions(+)
diff --git a/hw/gpio/pca_i2c_gpio.c b/hw/gpio/pca_i2c_gpio.c
index fa69523556..8e30064990 100644
--- a/hw/gpio/pca_i2c_gpio.c
+++ b/hw/gpio/pca_i2c_gpio.c
@@ -426,6 +426,19 @@ static void pca9538_gpio_class_init(ObjectClass *klass,
void *data)
k->send = pca9538_send;
}
+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";
+ pc->num_pins = PCA9536_NUM_PINS;
+
+ k->recv = pca9538_recv;
+ k->send = pca9538_send;
+}
+
static void pca_i2c_gpio_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@@ -477,6 +490,11 @@ 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 3ab7d19a97..6f8260a8c6 100644
--- a/include/hw/gpio/pca_i2c_gpio.h
+++ b/include/hw/gpio/pca_i2c_gpio.h
@@ -20,6 +20,7 @@
#define PCA_I2C_MAX_PINS 16
#define PCA6416_NUM_PINS 16
#define PCA9538_NUM_PINS 8
+#define PCA9536_NUM_PINS 4
typedef struct PCAGPIOClass {
I2CSlaveClass parent;
@@ -72,5 +73,6 @@ OBJECT_DECLARE_TYPE(PCAGPIOState, PCAGPIOClass, PCA_I2C_GPIO)
#define TYPE_PCA6416_GPIO "pca6416"
#define TYPE_PCA9538_GPIO "pca9538"
+#define TYPE_PCA9536_GPIO "pca9536"
#endif
--
2.39.1.581.gbfd45094c4-goog