linux-kernel - [PATCH v10 26/55] Input: atmel_mxt_ts - refactor code to enter bootloader into separate func

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Message-ID: <20200331105051.58896-27-jiada_wang@mentor.com>
Date:   Tue, 31 Mar 2020 03:50:22 -0700
From:   Jiada Wang <jiada_wang@...tor.com>
To:     <nick@...anahar.org>, <dmitry.torokhov@...il.com>,
        <jikos@...nel.org>, <benjamin.tissoires@...hat.com>,
        <bsz@...ihalf.com>
CC:     <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <erosca@...adit-jv.com>, <Andrew_Gabbasov@...tor.com>,
        <jiada_wang@...tor.com>
Subject: [PATCH v10 26/55] Input: atmel_mxt_ts - refactor code to enter bootloader into separate func

From: Nick Dyer <nick.dyer@...ev.co.uk>

Refactor code to enter bootloader into separate func

Signed-off-by: Nick Dyer <nick.dyer@...ev.co.uk>
(cherry picked from ndyer/linux/for-upstream commit bedd706a32522b946467e15f4f4f24de86a1b4d7)
[gdavis: Resolve forward port conflicts due to applying upstream
	 commit 96a938aa214e ("Input: atmel_mxt_ts - remove platform
	 data support").]
Signed-off-by: George G. Davis <george_davis@...tor.com>
[jiada: Squash change from ndyer/linux/for-upstream commit d691d3ee6c6de84b38464a42
3207b3e23cb9dc3a
	- Input: atmel_mxt_ts - check firmware format before entering bootloader
	Add commit description]
Signed-off-by: Jiada Wang <jiada_wang@...tor.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 43 +++++++++++++++---------
 1 file changed, 27 insertions(+), 16 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 2c4b68802bc3..11b2f133e6be 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -3257,23 +3257,10 @@ static int mxt_check_firmware_format(struct device *dev,
 	return -EINVAL;
 }
 
-static int mxt_load_fw(struct device *dev)
+static int mxt_enter_bootloader(struct mxt_data *data)
 {
-	struct mxt_data *data = dev_get_drvdata(dev);
-	struct mxt_flash f = { 0, };
 	int ret;
 
-	ret = request_firmware(&f.fw, data->fw_name, dev);
-	if (ret) {
-		dev_err(dev, "Unable to open firmware %s\n", data->fw_name);
-		return ret;
-	}
-
-	/* Check for incorrect enc file */
-	ret = mxt_check_firmware_format(dev, f.fw);
-	if (ret)
-		goto release_firmware;
-
 	if (data->suspended) {
 		if (data->suspend_mode == MXT_SUSPEND_REGULATOR)
 			mxt_regulator_enable(data);
@@ -3291,14 +3278,14 @@ static int mxt_load_fw(struct device *dev)
 		ret = mxt_t6_command(data, MXT_COMMAND_RESET,
 				     MXT_BOOT_VALUE, false);
 		if (ret)
-			goto release_firmware;
+			return ret;
 
 		msleep(MXT_RESET_TIME);
 
 		/* Do not need to scan since we know family ID */
 		ret = mxt_lookup_bootloader_address(data, 0);
 		if (ret)
-			goto release_firmware;
+			return ret;
 
 		mxt_sysfs_remove(data);
 		mxt_free_input_device(data);
@@ -3309,6 +3296,30 @@ static int mxt_load_fw(struct device *dev)
 
 	reinit_completion(&data->bl_completion);
 
+	return 0;
+}
+
+static int mxt_load_fw(struct device *dev)
+{
+	struct mxt_data *data = dev_get_drvdata(dev);
+	struct mxt_flash f = { 0, };
+	int ret;
+
+	ret = request_firmware(&f.fw, data->fw_name, dev);
+	if (ret) {
+		dev_err(dev, "Unable to open firmware %s\n", data->fw_name);
+		return ret;
+	}
+
+	/* Check for incorrect enc file */
+	ret = mxt_check_firmware_format(dev, f.fw);
+	if (ret)
+		goto release_firmware;
+
+	ret = mxt_enter_bootloader(data);
+	if (ret)
+		goto release_firmware;
+
 	ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false);
 	if (ret) {
 		/* Bootloader may still be unlocked from previous attempt */
-- 
2.17.1