Re: [PATCH 1/9] pinctrl: sunxi: Support I/O bias voltage setting on A80

2019-02-13 Thread Chen-Yu Tsai
On Mon, Feb 11, 2019 at 4:21 PM Linus Walleij wrote: > > On Wed, Feb 6, 2019 at 4:32 AM Chen-Yu Tsai wrote: > > > 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

Re: [PATCH 1/9] pinctrl: sunxi: Support I/O bias voltage setting on A80

2019-02-11 Thread Linus Walleij
On Wed, Feb 6, 2019 at 4:32 AM Chen-Yu Tsai wrote: > 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

Re: [PATCH 1/9] pinctrl: sunxi: Support I/O bias voltage setting on A80

2019-02-06 Thread Maxime Ripard
On Wed, Feb 06, 2019 at 11:32:31AM +0800, Chen-Yu Tsai wrote: > 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.

Re: [linux-sunxi] Re: [PATCH 1/9] pinctrl: sunxi: Support I/O bias voltage setting on A80

2019-02-06 Thread Chen-Yu Tsai
On Wed, Feb 6, 2019 at 4:14 PM Linus Walleij wrote: > > On Wed, Feb 6, 2019 at 4:32 AM Chen-Yu Tsai wrote: > > > 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

Re: [PATCH 1/9] pinctrl: sunxi: Support I/O bias voltage setting on A80

2019-02-06 Thread Linus Walleij
On Wed, Feb 6, 2019 at 4:32 AM Chen-Yu Tsai wrote: > 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

[PATCH 1/9] pinctrl: sunxi: Support I/O bias voltage setting on A80

2019-02-05 Thread Chen-Yu Tsai
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