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28b05a64e4
The io-domain registers on RK3568 SoCs have three separated bits to enable/disable the 1.8v/2.5v/3.3v power. This patch make the write to be a operation, allow rk3568 uses a private register set function. Since the 2.5v mode hasn't been fully validated yet, the driver only sets 1.8v [enable] + 3.3v [disable] for 1.8v mode 1.8v [disable] + 3.3v [enable] for 3.3v mode There is not register order requirement which has been cleared by our IC team. For future reference the full usage matrix including the 2.5V setting is: case V33 V25 V18 result 0 0 0 0 IO safe, but cannot work 1 0 0 1 IO require 1.8V, should < 1.98V, otherwise IO may damage 2 0 1 0 IO require 2.5V, should < 2.75V, otherwise IO may damage 3 0 1 1 Invalid state, should avoid 4 1 0 0 IO require 3.3V, should < 3.63V, otherwise IO may damage 5 1 0 1 IO require 1.8V, should < 1.98V, otherwise IO may damage 6 1 1 0 IO require 2.5V, should < 2.75V, otherwise IO may damage 7 1 1 1 Invalid state, should avoid Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com> Tested-by: Peter Geis <pgwipeout@gmail.com> [added mode clarification from Jay] Link: https://lore.kernel.org/r/20210805120107.27007-3-michael.riesch@wolfvision.net Signed-off-by: Heiko Stuebner <heiko@sntech.de> |
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| aspeed | ||
| atmel | ||
| bcm | ||
| canaan | ||
| dove | ||
| fsl | ||
| gemini | ||
| imx | ||
| ixp4xx | ||
| lantiq | ||
| litex | ||
| mediatek | ||
| qcom | ||
| renesas | ||
| rockchip | ||
| samsung | ||
| sifive | ||
| sunxi | ||
| tegra | ||
| ti | ||
| ux500 | ||
| versatile | ||
| xilinx | ||
| Kconfig | ||
| Makefile | ||