From 685dc9a7dbfede28cc4a0fe4e65804194ec04fa5 Mon Sep 17 00:00:00 2001 From: Chanwoo Choi Date: Wed, 13 Feb 2013 15:04:15 +0900 Subject: [PATCH] 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 Signed-off-by: Myungjoo Ham --- drivers/extcon/extcon-max8997.c | 28 ++++++++++++++++++++++++++-- include/linux/mfd/max8997.h | 7 +++++++ 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 {