extcon: max8997: Set default UART/USB path on probe

This patch set default H/W line path according to platfomr data.
The MAX8997 MUIC device can possibly set UART/USB or UART_AUX
/USB_AUX to internal H/W line path of MUIC device. Namely, only
one H/W line is used for two operation.

For example,
if H/W line path of MAX8997 device set UART/USB, micro usb cable
is connected to AP(Application Processor) and if H/W line path
set UART_AUX/USB_AUX, micro usb cable is connected to CP(Coprocessor).

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>

2 files changed, 33 insertions, 2 deletions

diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 35338a090c06..349f65f6a4a4 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -127,6 +127,13 @@ struct max8997_muic_info {
 
         struct max8997_muic_platform_data *muic_pdata;
         enum max8997_muic_charger_type pre_charger_type;
+
+        /*
+         * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+         * h/w path of COMP2/COMN1 on CONTROL1 register.
+         */
+        int path_usb;
+        int path_uart;
 };
 
 enum {
@@ -322,7 +329,7 @@ static int max8997_muic_handle_usb(struct max8997_muic_info *info,
         int ret = 0;
 
         if (usb_type == MAX8997_USB_HOST) {
-                ret = max8997_muic_set_path(info, CONTROL1_SW_USB, attached);
+                ret = max8997_muic_set_path(info, info->path_usb, attached);
                 if (ret < 0) {
                         dev_err(info->dev, "failed to update muic register\n");
                         return ret;
@@ -378,7 +385,7 @@ static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
         int ret = 0;
 
         /* switch to UART */
-        ret = max8997_muic_set_path(info, CONTROL1_SW_UART, attached);
+        ret = max8997_muic_set_path(info, info->path_uart, attached);
         if (ret) {
                 dev_err(info->dev, "failed to update muic register\n");
                 return -EINVAL;
@@ -694,6 +701,23 @@ static int max8997_muic_probe(struct platform_device *pdev)
                 }
         }
 
+        /*
+         * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+         * h/w path of COMP2/COMN1 on CONTROL1 register.
+         */
+        if (pdata->muic_pdata->path_uart)
+                info->path_uart = pdata->muic_pdata->path_uart;
+        else
+                info->path_uart = CONTROL1_SW_UART;
+
+        if (pdata->muic_pdata->path_usb)
+                info->path_usb = pdata->muic_pdata->path_usb;
+        else
+                info->path_usb = CONTROL1_SW_USB;
+
+        /* Set initial path for UART */
+         max8997_muic_set_path(info, info->path_uart, true);
+
         /* Set ADC debounce time */
         max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
 
diff --git a/include/linux/mfd/max8997.h b/include/linux/mfd/max8997.h
index 65f8d6a3a608..2d2d67b6a393 100644
--- a/include/linux/mfd/max8997.h
+++ b/include/linux/mfd/max8997.h
@@ -92,6 +92,13 @@ struct max8997_muic_reg_data {
 struct max8997_muic_platform_data {
         struct max8997_muic_reg_data *init_data;
         int num_init_data;
+
+        /*
+         * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
+         * h/w path of COMP2/COMN1 on CONTROL1 register.
+         */
+        int path_usb;
+        int path_uart;
 };
 
 enum max8997_haptic_motor_type {