From a1f267651f1f653c82f46bf1d7d108ad31926a10 Mon Sep 17 00:00:00 2001 From: Matthias Schwarzott Date: Thu, 2 Oct 2014 02:21:00 -0300 Subject: [media] cx231xx: remember status of i2c port_3 switch This is used later for is_tuner function that switches i2c behaviour for some tuners. [mchehab@osg.samsung.com: Fix CodingStyle on a multi-line comment] Signed-off-by: Matthias Schwarzott Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/cx231xx/cx231xx-avcore.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/media/usb/cx231xx/cx231xx-avcore.c') diff --git a/drivers/media/usb/cx231xx/cx231xx-avcore.c b/drivers/media/usb/cx231xx/cx231xx-avcore.c index 40a69879fc0a..0a5fec47c08c 100644 --- a/drivers/media/usb/cx231xx/cx231xx-avcore.c +++ b/drivers/media/usb/cx231xx/cx231xx-avcore.c @@ -1272,6 +1272,14 @@ int cx231xx_enable_i2c_port_3(struct cx231xx *dev, bool is_port_3) if (dev->board.dont_use_port_3) is_port_3 = false; + + /* + * Should this code check dev->port_3_switch_enabled first + * to skip unnecessary reading of the register? + * If yes, the flag dev->port_3_switch_enabled must be initialized + * correctly. + */ + status = cx231xx_read_ctrl_reg(dev, VRT_GET_REGISTER, PWR_CTL_EN, value, 4); if (status < 0) @@ -1294,6 +1302,10 @@ int cx231xx_enable_i2c_port_3(struct cx231xx *dev, bool is_port_3) status = cx231xx_write_ctrl_reg(dev, VRT_SET_REGISTER, PWR_CTL_EN, value, 4); + /* remember status of the switch for usage in is_tuner */ + if (status >= 0) + dev->port_3_switch_enabled = is_port_3; + return status; } -- cgit v1.2.3