Add GC2395/CAMSS rear camera driver and fix audio, earpiece, micbias, and modem routing

src/leds-msm8905-torch/leds-msm8905-torch.c

@@ -188,20 +188,39 @@ static void msm8905_pon_lookup_regmap(void)
 {
   struct device_node *np;
   struct platform_device *pon_pdev;
+  struct platform_device *codec_pdev;
+  struct regmap *codec_regmap = NULL;
 
   np = of_find_compatible_node(NULL, NULL, "qcom,pm8916-pon");
-  if (!np)
-    return;
+  if (np) {
+    pon_pdev = of_find_device_by_node(np);
+    of_node_put(np);
+    if (pon_pdev) {
+      if (pon_pdev->dev.parent)
+        pon_regmap = dev_get_regmap(pon_pdev->dev.parent, NULL);
+      put_device(&pon_pdev->dev);
+    }
+  }
 
-  pon_pdev = of_find_device_by_node(np);
-  of_node_put(np);
-  if (!pon_pdev)
-    return;
-
-  if (pon_pdev->dev.parent)
-    pon_regmap = dev_get_regmap(pon_pdev->dev.parent, NULL);
-
-  put_device(&pon_pdev->dev);
+  /*
+   * Configure PM8909 WCD analog codec (USID 1):
+   * - CDC_A_MICB_1_VAL (0xf141) = 0x60 (2.8V micbias for internal MEMS mic)
+   * - CDC_A_RX_EAR_CTL (0xf1c0) |= 0x20 (+6 dB EAR PA gain for earpiece)
+   */
+  np = of_find_compatible_node(NULL, NULL, "qcom,pm8916-wcd-analog-codec");
+  if (np) {
+    codec_pdev = of_find_device_by_node(np);
+    of_node_put(np);
+    if (codec_pdev) {
+      if (codec_pdev->dev.parent)
+        codec_regmap = dev_get_regmap(codec_pdev->dev.parent, NULL);
+      put_device(&codec_pdev->dev);
+    }
+  }
+  if (codec_regmap) {
+    regmap_write(codec_regmap, 0xf141U, 0x60U);
+    regmap_update_bits(codec_regmap, 0xf1c0U, 0x20U, 0x20U);
+  }
 }
 
 static int __init msm8905_torch_init(void)

src/msm8905-cam/Makefile

@@ -0,0 +1,10 @@
+obj-m += msm8905-cam.o
+
+KDIR ?= /lib/modules/$(shell uname -r)/build
+PWD := $(shell pwd)
+
+all:
+	$(MAKE) -C $(KDIR) M=$(PWD) modules
+
+clean:
+	$(MAKE) -C $(KDIR) M=$(PWD) clean