From: Lubomir Rintel <lkundrak@v3.sk>
Date: Tue, 28 May 2019 09:07:27 +0000 (-0400)
Subject: media: marvell-ccic/mmp: enable clock before accessing registers
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=f12fb2849b11b4c571a32d31ec51eabd70ab8193;p=openwrt%2Fstaging%2Fblogic.git

media: marvell-ccic/mmp: enable clock before accessing registers

The access to REG_CLKCTRL or REG_CTRL1 without the clock enabled hangs
the machine. Enable the clock first.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
---

diff --git a/drivers/media/platform/marvell-ccic/mmp-driver.c b/drivers/media/platform/marvell-ccic/mmp-driver.c
index 25a4e2b580f4..bd2934a4d7ce 100644
--- a/drivers/media/platform/marvell-ccic/mmp-driver.c
+++ b/drivers/media/platform/marvell-ccic/mmp-driver.c
@@ -142,6 +142,7 @@ static int mmpcam_power_up(struct mcam_camera *mcam)
  * Turn on power and clocks to the controller.
  */
 	mmpcam_power_up_ctlr(cam);
+	mcam_clk_enable(mcam);
 /*
  * Provide power to the sensor.
  */
@@ -155,8 +156,6 @@ static int mmpcam_power_up(struct mcam_camera *mcam)
 	gpio_set_value(pdata->sensor_reset_gpio, 1); /* reset is active low */
 	mdelay(5);
 
-	mcam_clk_enable(mcam);
-
 	return 0;
 }