linux/drivers/pinctrl/sunxi
Chen-Yu Tsai 402bfb3c13 pinctrl: sunxi: Support I/O bias voltage setting on A80
The A80 SoC has configuration registers for I/O bias voltage. Incorrect
settings would make the affected peripherals inoperable in some cases,
such as Ethernet RGMII signals biased at 2.5V with the settings still
at 3.3V. However low speed signals such as MDIO on the same group of
pins seem to be unaffected.

Previously there was no way to know what the actual voltage used was,
short of hard-coding a value in the device tree. With the new pin bank
regulator supply support in place, the driver can now query the
regulator for its voltage, and if it's valid (as opposed to being the
dummy regulator), set the bias voltage setting accordingly.

Add a quirk to denote the presence of the configuration registers, and
a function to set the correct setting based on the voltage read back
from the regulator.

This is only done when the regulator is first acquired and enabled.
While it would be nice to have a notifier on the regulator so that when
the voltage changes, the driver can update the setting, in practice no
board currently supports dynamic changing of the I/O voltages.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-02-11 09:20:58 +01:00
..
Kconfig pinctrl: sunxi: add support for suniv F1C100s (newer F-series SoCs) 2018-11-25 13:49:10 +01:00
Makefile pinctrl: sunxi: add support for suniv F1C100s (newer F-series SoCs) 2018-11-25 13:49:10 +01:00
pinctrl-sun4i-a10.c pinctrl: sunxi: fix a typo when merging A20 support to A10 driver 2017-12-28 15:06:01 +01:00
pinctrl-sun5i.c pinctrl: sunxi: Disable strict mode for old pinctrl drivers 2017-10-31 09:45:00 +01:00
pinctrl-sun6i-a31-r.c pinctrl: sunxi: Disable strict mode for old pinctrl drivers 2017-10-31 09:45:00 +01:00
pinctrl-sun6i-a31.c pinctrl: sunxi: Disable strict mode for old pinctrl drivers 2017-10-31 09:45:00 +01:00
pinctrl-sun8i-a23-r.c pinctrl: sunxi: Disable strict mode for old pinctrl drivers 2017-10-31 09:45:00 +01:00
pinctrl-sun8i-a23.c pinctrl: sunxi: Disable strict mode for old pinctrl drivers 2017-10-31 09:45:00 +01:00
pinctrl-sun8i-a33.c pinctrl: sunxi: change irq_bank_base to irq_bank_map 2018-03-27 15:07:49 +02:00
pinctrl-sun8i-a83t-r.c pinctrl: sunxi: Add support for A83T R_PIO 2017-06-09 11:20:32 +02:00
pinctrl-sun8i-a83t.c pinctrl: sunxi: a83t: Fix IRQ offset typo for PH11 2018-12-07 13:32:19 +01:00
pinctrl-sun8i-h3-r.c pinctrl: sunxi: Disable strict mode for old pinctrl drivers 2017-10-31 09:45:00 +01:00
pinctrl-sun8i-h3.c pinctrl: sunxi: Disable strict mode for old pinctrl drivers 2017-10-31 09:45:00 +01:00
pinctrl-sun8i-v3s.c pinctrl: sunxi: change irq_bank_base to irq_bank_map 2018-03-27 15:07:49 +02:00
pinctrl-sun9i-a80-r.c pinctrl: sunxi: Support I/O bias voltage setting on A80 2019-02-11 09:20:58 +01:00
pinctrl-sun9i-a80.c pinctrl: sunxi: Support I/O bias voltage setting on A80 2019-02-11 09:20:58 +01:00
pinctrl-sun50i-a64-r.c pinctrl: sunxi: Add A64 R_PIO controller support 2017-03-14 14:42:24 +01:00
pinctrl-sun50i-a64.c pinctrl: sunxi: a64: Rename function ts0 to ts 2018-12-07 13:29:28 +01:00
pinctrl-sun50i-h5.c pinctrl: sunxi: Disable strict mode for H5 driver 2017-11-30 16:50:43 +01:00
pinctrl-sun50i-h6-r.c pinctrl: sunxi: add support for H6 R_PIO pin controller 2018-05-16 14:19:13 +02:00
pinctrl-sun50i-h6.c pinctrl: sunxi: Correct number of IRQ banks on H6 main pin controller 2019-01-22 10:52:39 +01:00
pinctrl-suniv-f1c100s.c pinctrl: sunxi: add support for suniv F1C100s (newer F-series SoCs) 2018-11-25 13:49:10 +01:00
pinctrl-sunxi.c pinctrl: sunxi: Support I/O bias voltage setting on A80 2019-02-11 09:20:58 +01:00
pinctrl-sunxi.h pinctrl: sunxi: Support I/O bias voltage setting on A80 2019-02-11 09:20:58 +01:00