linux-kernel - [PATCH 3/3] extcon: max77693: Force using UART path for jig

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Date:	Fri, 04 Jul 2014 15:51:26 +0300
From:	Dmitry Kasatkin <d.kasatkin@...sung.com>
To:	cw00.choi@...sung.com
Cc:	linux-kernel@...r.kernel.org,
	Dmitry Kasatkin <d.kasatkin@...sung.com>,
	Jonghwa Lee <jonghwa3.lee@...sung.com>,
	MyungJoo Ham <myungjoo.ham@...sung.com>
Subject: [PATCH 3/3] extcon: max77693: Force using UART path for jig

When USB cable is connected to jig, device disables console.
This patch forces using UART when jig cable is connected.
It allows to charge the device, which also prevents it from sleeping.

Signed-off-by: Dmitry Kasatkin <d.kasatkin@...sung.com>
Signed-off-by: Jonghwa Lee <jonghwa3.lee@...sung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@...sung.com>
---
 drivers/extcon/extcon-max77693.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
index 1b194b3..862d68f 100644
--- a/drivers/extcon/extcon-max77693.c
+++ b/drivers/extcon/extcon-max77693.c
@@ -296,10 +296,18 @@ static int max77693_muic_set_path(struct max77693_muic_info *info,
 		return ret;
 	}
 
-	if (attached)
-		ctrl1 = val;
-	else
+	if (attached) {
+		if (info->prev_cable_type ==
+		    MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF) {
+			/* if cable_type is jig, then force UART */
+			dev_info(info->dev, "For jig force using UART path\n");
+			ctrl1 = CONTROL1_SW_UART;
+		} else {
+			ctrl1 = val;
+		}
+	} else {
 		ctrl1 = CONTROL1_SW_OPEN;
+	}
 
 	ret = max77693_update_reg(info->max77693->regmap_muic,
 			MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK);
-- 
1.9.1

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