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e6431a0c0d
linux/drivers/media/usb
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Chuck Ritola e6431a0c0d media: dvb-frontends: a8293: fix LNB powerup failure in PCTV 461e 
Fixes a8293 failure to raise LNB voltage in PCTV 461e DVB-S2 Stick
affecting multiple users over several years as found here:

http://www.linuxquestions.org/questions/linux-hardware-18/pctv-dvb-s2-stick-461e-not-feeding-lnb-4175529374/
https://www.linuxtv.org/wiki/index.php/Pinnacle_PCTV_DVB-S2_Stick_(461e)
https://github.com/OpenELEC/OpenELEC.tv/issues/3731

Caused by vIN undervoltage lockout (status register bit 7) when raising LNB to 18V.
Addressed by using the higher-precision voltages available on the a8293 to gradually
increase (slew) the voltage when voltage increases are requested.

Adds volt_slew_nanos_per_mv to a8293_platform_data struct for specifying slew rate.
If value is <1 or non-sane (>1600), the original no-slew version for a8293_set_voltage is used.

Link: https://lore.kernel.org/linux-media/20211231035326.6759-1-cjritola@gmail.com
[mchehab: fixed some coding style issues]
Signed-off-by: Chuck Ritola <cjritola@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2022-11-25 09:55:55 +00:00
..
airspy media: airspy: fix memory leak in airspy probe 2022-08-30 07:31:42 +02:00
as102
au0828 media: vb2/au0828: move the v4l_vb2q_enable_media_source to the au0828 driver 2022-11-25 07:41:40 +00:00
b2c2 media: flexcop-usb: use usb_endpoint_maxp() 2022-09-26 10:59:25 +02:00
cx231xx media: avoid use of 'videobuf' 2022-08-29 16:27:18 +02:00
dvb-usb media: technisat-usb2: Fix comment typo 2022-08-29 15:32:14 +02:00
dvb-usb-v2 media: usb/dvb-usb-v2: fix repeated words in comments 2022-09-24 08:47:01 +02:00
em28xx media: dvb-frontends: a8293: fix LNB powerup failure in PCTV 461e 2022-11-25 09:55:55 +00:00
go7007 media: usb: go7007: s2250-board: Convert to i2c's .probe_new() 2022-11-21 11:04:46 +01:00
gspca media: gspca: Fix typo 'the the' in comment 2022-08-29 15:32:14 +02:00
hackrf media: Kconfig: cleanup VIDEO_DEV dependencies 2022-03-18 05:58:35 +01:00
hdpvr media: hdpvr: fix error value returns in hdpvr_read 2022-06-27 09:02:50 +01:00
msi2500 media: usb/msi2500: fix repeated words in comments 2022-09-24 08:46:38 +02:00
pvrusb2 media: avoid use of 'videobuf' 2022-08-29 16:27:18 +02:00
pwc media: Kconfig: cleanup VIDEO_DEV dependencies 2022-03-18 05:58:35 +01:00
s2255 media: Kconfig: cleanup VIDEO_DEV dependencies 2022-03-18 05:58:35 +01:00
siano media: siano: remove duplicate USB device IDs 2021-12-07 11:29:58 +01:00
stk1160 media: stk1160: use dma_alloc_noncontiguous API 2022-03-07 11:01:22 +01:00
ttusb-budget media: dvb-ttusb-budget: cleanup printk logic 2020-09-03 11:15:47 +02:00
ttusb-dec media: ttusb-dec: avoid release of non-acquired mutex 2021-09-30 10:07:40 +02:00
usbtv media: usbtv: Add PAL-Nc standard 2022-06-20 10:30:30 +01:00
uvc USB/Thunderbolt changes for 6.1-rc1 2022-10-07 16:48:26 -07:00
Kconfig media: tm6000: deprecate this driver 2022-08-29 16:43:00 +02:00
Makefile media: tm6000: deprecate this driver 2022-08-29 16:43:00 +02:00