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Date: Wed, 13 Feb 2013 18:35:16 +0900
From: Chanwoo Choi <cw00.choi@...sung.com>
To: gregkh@...uxfoundation.org, sameo@...ux.intel.com
Cc: linux-kernel@...r.kernel.org, myungjoo.ham@...sung.com,
kyungmin.park@...sung.com, Chanwoo Choi <cw00.choi@...sung.com>
Subject: [PATCH 5/9] extcon: max8997: Remove duplicate code related to set H/W
line path
Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>
---
drivers/extcon/extcon-max8997.c | 62 ++++++++++++++++++++++++++++++-------
include/linux/mfd/max8997-private.h | 19 +++++++++++-
2 files changed, 69 insertions(+), 12 deletions(-)
diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 0fb1d48..8739b50 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -94,16 +94,61 @@ static const char *max8997_extcon_cable[] = {
NULL,
};
+/*
+ * max8997_muic_set_path - Set hardware line according to attached cable
+ * @info: the instance including private data of max8997 MUIC
+ * @value: the path according to attached cable
+ * @attached: the state of cable (true:attached, false:detached)
+ *
+ * The max8997 MUIC device share outside H/W line among a varity of cables,
+ * so this function set internal path of H/W line according to the type of
+ * attached cable.
+ */
+static int max8997_muic_set_path(struct max8997_muic_info *info,
+ u8 val, bool attached)
+{
+ int ret = 0;
+ u8 ctrl1, ctrl2 = 0;
+
+ if (attached)
+ ctrl1 = val;
+ else
+ ctrl1 = CONTROL1_SW_OPEN;
+
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return -EAGAIN;
+ }
+
+ if (attached)
+ ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
+ else
+ ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
+
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL2, ctrl2,
+ CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ return -EAGAIN;
+ }
+
+ dev_info(info->dev,
+ "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
+ ctrl1, ctrl2, attached ? "attached" : "detached");
+
+ return 0;
+}
+
static int max8997_muic_handle_usb(struct max8997_muic_info *info,
enum max8997_muic_usb_type usb_type, bool attached)
{
int ret = 0;
if (usb_type == MAX8997_USB_HOST) {
- /* switch to USB */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? CONTROL1_SW_USB : CONTROL1_SW_OPEN,
- CONTROL1_SW_MASK);
+ ret = max8997_muic_set_path(info, CONTROL1_SW_USB, attached);
if (ret) {
dev_err(info->dev, "failed to update muic register\n");
goto out;
@@ -131,10 +176,7 @@ static int max8997_muic_handle_dock(struct max8997_muic_info *info,
{
int ret = 0;
- /* switch to AUDIO */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? CONTROL1_SW_AUDIO : CONTROL1_SW_OPEN,
- CONTROL1_SW_MASK);
+ ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
if (ret) {
dev_err(info->dev, "failed to update muic register\n");
goto out;
@@ -161,9 +203,7 @@ static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
int ret = 0;
/* switch to UART */
- ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
- attached ? CONTROL1_SW_UART : CONTROL1_SW_OPEN,
- CONTROL1_SW_MASK);
+ ret = max8997_muic_set_path(info, CONTROL1_SW_UART, attached);
if (ret) {
dev_err(info->dev, "failed to update muic register\n");
goto out;
diff --git a/include/linux/mfd/max8997-private.h b/include/linux/mfd/max8997-private.h
index acf42e9..010173a 100644
--- a/include/linux/mfd/max8997-private.h
+++ b/include/linux/mfd/max8997-private.h
@@ -223,7 +223,7 @@ enum max8997_muic_reg {
#define COMP2SW_SHIFT 3
#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
-#define CONTROL1_SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
+#define COMP_SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
#define CONTROL1_SW_USB ((1 << COMP2SW_SHIFT) \
| (1 << COMN1SW_SHIFT))
@@ -234,6 +234,23 @@ enum max8997_muic_reg {
#define CONTROL1_SW_OPEN ((0 << COMP2SW_SHIFT) \
| (0 << COMN1SW_SHIFT))
+#define CONTROL2_LOWPWR_SHIFT (0)
+#define CONTROL2_ADCEN_SHIFT (1)
+#define CONTROL2_CPEN_SHIFT (2)
+#define CONTROL2_SFOUTASRT_SHIFT (3)
+#define CONTROL2_SFOUTORD_SHIFT (4)
+#define CONTROL2_ACCDET_SHIFT (5)
+#define CONTROL2_USBCPINT_SHIFT (6)
+#define CONTROL2_RCPS_SHIFT (7)
+#define CONTROL2_LOWPWR_MASK (0x1 << CONTROL2_LOWPWR_SHIFT)
+#define CONTROL2_ADCEN_MASK (0x1 << CONTROL2_ADCEN_SHIFT)
+#define CONTROL2_CPEN_MASK (0x1 << CONTROL2_CPEN_SHIFT)
+#define CONTROL2_SFOUTASRT_MASK (0x1 << CONTROL2_SFOUTASRT_SHIFT)
+#define CONTROL2_SFOUTORD_MASK (0x1 << CONTROL2_SFOUTORD_SHIFT)
+#define CONTROL2_ACCDET_MASK (0x1 << CONTROL2_ACCDET_SHIFT)
+#define CONTROL2_USBCPINT_MASK (0x1 << CONTROL2_USBCPINT_SHIFT)
+#define CONTROL2_RCPS_MASK (0x1 << CONTROL2_RCPS_SHIFT)
+
#define MAX8997_ADC_GROUND 0x00
#define MAX8997_ADC_MHL 0x01
#define MAX8997_ADC_JIG_USB_1 0x18
--
1.8.0
--
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