diff options
Diffstat (limited to 'Documentation/getting_started')
| -rw-r--r-- | Documentation/getting_started/gpio.md | 81 |
1 files changed, 55 insertions, 26 deletions
diff --git a/Documentation/getting_started/gpio.md b/Documentation/getting_started/gpio.md index 5f30ea7c38df..216ba5d3bb61 100644 --- a/Documentation/getting_started/gpio.md +++ b/Documentation/getting_started/gpio.md @@ -167,32 +167,61 @@ could cause catastrophic failures, up to and including your mainboard! As per Intel Platform Controller Hub (PCH) EDS since Skylake, a GPIO PAD register supports four different types of GPIO reset as: -| PAD Reset Config | Platform Reset | GPP | GPD | -|-------------------------------------------------|----------------|-----|-----| -| 00 - Power Good (GPP: RSMRST, GPD: DSW_PWROK) | Warm Reset | N | N | -| | Cold Reset | N | N | -| | S3/S4/S5 | N | N | -| | Global Reset | N | N | -| | Deep Sx | Y | N | -| | G3 | Y | N | -| 01 - Deep | Warm Reset | Y | Y | -| | Cold Reset | Y | Y | -| | S3/S4/S5 | N | N | -| | Global Reset | Y | Y | -| | Deep Sx | Y | Y | -| | G3 | Y | Y | -| 10 - Host Reset/PLTRST | Warm Reset | Y | Y | -| | Cold Reset | Y | Y | -| | S3/S4/S5 | Y | Y | -| | Global Reset | Y | Y | -| | Deep Sx | Y | Y | -| | G3 | Y | Y | -| 11 - Resume Reset (GPP: Reserved, GPD: RSMRST) | Warm Reset | - | N | -| | Cold Reset | - | N | -| | S3/S4/S5 | - | N | -| | Global Reset | - | N | -| | Deep Sx | - | Y | -| | G3 | - | Y | +```eval_rst ++------------------------+----------------+-------------+-------------+ +| | | PAD Reset ? | ++ PAD Reset Config + Platform Reset +-------------+-------------+ +| | | GPP | GPD | ++========================+================+=============+=============+ +| | 00 - Power Good | Warm Reset | N | N | +| | (GPP: RSMRST, +----------------+-------------+-------------+ +| | GPD: DSW_PWROK) | Cold Reset | N | N | +| |----------------+-------------+-------------+ +| | S3/S4/S5 | N | N | +| +----------------+-------------+-------------+ +| | Global Reset | N | N | +| +----------------+-------------+-------------+ +| | Deep Sx | Y | N | +| +----------------+-------------+-------------+ +| | G3 | Y | Y | ++------------------------+----------------+-------------+-------------+ +| 01 - Deep | Warm Reset | Y | Y | +| +----------------+-------------+-------------+ +| | Cold Reset | Y | Y | +| +----------------+-------------+-------------+ +| | S3/S4/S5 | N | N | +| +----------------+-------------+-------------+ +| | Global Reset | Y | Y | +| +----------------+-------------+-------------+ +| | Deep Sx | Y | Y | +| +----------------+-------------+-------------+ +| | G3 | Y | Y | ++------------------------+----------------+-------------+-------------+ +| 10 - Host Reset/PLTRST | Warm Reset | Y | Y | +| +----------------+-------------+-------------+ +| | Cold Reset | Y | Y | +| +----------------+-------------+-------------+ +| | S3/S4/S5 | Y | Y | +| +----------------+-------------+-------------+ +| | Global Reset | Y | Y | +| +----------------+-------------+-------------+ +| | Deep Sx | Y | Y | +| +----------------+-------------+-------------+ +| | G3 | Y | Y | ++------------------------+----------------+-------------+-------------+ +| | 11 - Resume Reset | Warm Reset | - | N | +| | (GPP: Reserved, +----------------+-------------+-------------+ +| | GPD: RSMRST) | Cold Reset | - | N | +| +----------------+-------------+-------------+ +| | S3/S4/S5 | - | N | +| +----------------+-------------+-------------+ +| | Global Reset | - | N | +| +----------------+-------------+-------------+ +| | Deep Sx | - | Y | +| +----------------+-------------+-------------+ +| | G3 | - | Y | ++------------------------+----------------+-------------+-------------+ +``` Each GPIO Community has a Pad Configuration Lock register for a GPP allowing locking specific register fields in the PAD configuration register. |