[PATCH v3 3/5] hw/gpio: add PCA9536 i2c gpio expander

[Titus Rwantare <titusr@google.com>]

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: Philippe Mathieu-Daudé <philmd@linaro.org>
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 ++
 tests/lcitool/libvirt-ci       |  2 +-
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/hw/gpio/pca_i2c_gpio.c b/hw/gpio/pca_i2c_gpio.c
index 00ba343f95..14da58e5c4 100644
--- a/hw/gpio/pca_i2c_gpio.c
+++ b/hw/gpio/pca_i2c_gpio.c
@@ -337,6 +337,19 @@ static void pca9538_gpio_class_init(ObjectClass *klass, void *data)
     k->send = pca953x_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 = pca953x_recv;
+    k->send = pca953x_send;
+}
+
 static void pca_i2c_gpio_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -387,6 +400,11 @@ 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 a4220105e8..deb4528065 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;
@@ -63,5 +64,6 @@ OBJECT_DECLARE_TYPE(PCAGPIOState, PCAGPIOClass, PCA_I2C_GPIO)
 
 #define TYPE_PCA6416_GPIO "pca6416"
 #define TYPE_PCA9538_GPIO "pca9538"
+#define TYPE_PCA9536_GPIO "pca9536"
 
 #endif
diff --git a/tests/lcitool/libvirt-ci b/tests/lcitool/libvirt-ci
index e3eb28cf2e..232f41f160 160000
--- a/tests/lcitool/libvirt-ci
+++ b/tests/lcitool/libvirt-ci
@@ -1 +1 @@
-Subproject commit e3eb28cf2e17fbcf7fe7e19505ee432b8ec5bbb5
+Subproject commit 232f41f160d4567b8c82dd52aa96c2bc3a5b75c1
-- 
2.40.0.rc1.284.g88254d51c5-goog