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[PULL,2/2] hw/i2c: add pca9543 i2c-mux switch

Message ID 20231207014148.3116889-3-minyard@acm.org (mailing list archive)
State New, archived
Headers show
Series Pull request for some I2C changes | expand

Commit Message

Corey Minyard Dec. 7, 2023, 1:41 a.m. UTC 
From: Potin Lai <potin.lai.pt@gmail.com>

Add pca9543 2-channel i2c-mux switch support.

Signed-off-by: Potin Lai <potin.lai.pt@gmail.com>
Reviewed-by: Patrick Venture <venture@google.com>
Message-Id: <20231113063156.2264941-1-potin.lai.pt@gmail.com>
Signed-off-by: Corey Minyard <minyard@acm.org>
---
 hw/i2c/i2c_mux_pca954x.c         | 12 ++++++++++++
 include/hw/i2c/i2c_mux_pca954x.h |  1 +
 2 files changed, 13 insertions(+)
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Patch

diff --git a/hw/i2c/i2c_mux_pca954x.c b/hw/i2c/i2c_mux_pca954x.c
index db5db956a6..6aace0fc47 100644
--- a/hw/i2c/i2c_mux_pca954x.c
+++ b/hw/i2c/i2c_mux_pca954x.c
@@ -30,6 +30,7 @@ 
 
 #define PCA9548_CHANNEL_COUNT 8
 #define PCA9546_CHANNEL_COUNT 4
+#define PCA9543_CHANNEL_COUNT 2
 
 /*
  * struct Pca954xState - The pca954x state object.
@@ -172,6 +173,12 @@  I2CBus *pca954x_i2c_get_bus(I2CSlave *mux, uint8_t channel)
     return pca954x->bus[channel];
 }
 
+static void pca9543_class_init(ObjectClass *klass, void *data)
+{
+    Pca954xClass *s = PCA954X_CLASS(klass);
+    s->nchans = PCA9543_CHANNEL_COUNT;
+}
+
 static void pca9546_class_init(ObjectClass *klass, void *data)
 {
     Pca954xClass *s = PCA954X_CLASS(klass);
@@ -246,6 +253,11 @@  static const TypeInfo pca954x_info[] = {
         .class_init    = pca954x_class_init,
         .abstract      = true,
     },
+    {
+        .name          = TYPE_PCA9543,
+        .parent        = TYPE_PCA954X,
+        .class_init    = pca9543_class_init,
+    },
     {
         .name          = TYPE_PCA9546,
         .parent        = TYPE_PCA954X,
diff --git a/include/hw/i2c/i2c_mux_pca954x.h b/include/hw/i2c/i2c_mux_pca954x.h
index 3dd25ec983..1da5508ed5 100644
--- a/include/hw/i2c/i2c_mux_pca954x.h
+++ b/include/hw/i2c/i2c_mux_pca954x.h
@@ -3,6 +3,7 @@ 
 
 #include "hw/i2c/i2c.h"
 
+#define TYPE_PCA9543 "pca9543"
 #define TYPE_PCA9546 "pca9546"
 #define TYPE_PCA9548 "pca9548"