BMC/Intel-BMC/linux.git/Documentation/devicetree, branch dev-5.14-intel

Add AST2500 eSPI driver

2021-10-19T22:10:36+00:00

When PCH works under eSPI mode, the PMC (Power Management Controller) in PCH is waiting for SUS_ACK from BMC after it alerts SUS_WARN. It is in dead loop if no SUS_ACK assert. This is the basic requirement for the BMC works as eSPI slave. Also for the host power on / off actions, from BMC side, the following VW (Virtual Wire) messages are done in firmware: 1. SLAVE_BOOT_LOAD_DONE / SLAVE_BOOT_LOAD_STATUS 2. SUS_ACK 3. OOB_RESET_ACK 4. HOST_RESET_ACK Also, it provides monitoring interface of PLTRST_N signal through /dev/espi-pltrstn Signed-off-by: Haiyue Wang Signed-off-by: Jae Hyun Yoo Signed-off-by: James Feist Signed-off-by: Vernon Mauery

arm: dts: aspeed-g6: Add ast2600-mctp node

2021-10-19T22:10:33+00:00

AST2600 provides MCTP over PCIe controller allowing BMC to communicate with devices on host PCIe bus. We are also adding syscon node describing PCIe Host controller device which can be used to gather information on PCIe enumeration (and assigned address). Signed-off-by: Iwona Winiarska

i2c: aspeed: add general call support

2021-10-19T22:10:32+00:00

This commit adds general call support into Aspeed I2C driver. This is downstream only customization so it should not go into upstream. Signed-off-by: Jae Hyun Yoo

i2c: aspeed: add DMA mode transfer support

2021-10-19T22:10:32+00:00

This commit adds DMA mode transfer support. Only AST2500 supports DMA mode under some limitations: I2C is sharing the DMA H/W with UHCI host controller and MCTP controller. Since those controllers operate with DMA mode only, I2C has to use buffer mode or byte mode instead if one of those controllers is enabled. Also make sure that if SD/eMMC or Port80 snoop uses DMA mode instead of PIO or FIFO respectively, I2C can't use DMA mode. Signed-off-by: Jae Hyun Yoo

dt-binding: jtag: Aspeed 24/25/2600 series

2021-10-19T22:10:31+00:00

Aspeed AST2400, AST2500 and AST2600 JTAG master controller driver. Signed-off-by: Oleksandr Shamray Signed-off-by: Jiri Pirko Signed-off-by: Ernesto Corona Acked-by: Rob Herring Cc: Jonathan Corbet Cc: Mauro Carvalho Chehab Cc: Alexandre Belloni Cc: "Theodore Ts'o" Cc: Arnd Bergmann Cc: Eric Biggers Cc: Mark Rutland Cc: Joel Stanley Cc: Andrew Jeffery Cc: Steven Filary Cc: Vadim Pasternak Cc: Amithash Prasad Cc: Patrick Williams Cc: Rgrs

char: ipmi: Add clock control logic into Aspeed LPC KCS driver

2021-10-19T22:10:31+00:00

If LPC KCS driver is registered ahead of lpc-ctrl module, LPC KCS block will be enabled without heart beating of LCLK until lpc-ctrl enables the LCLK. This issue causes improper handling on host interrupts when the host sends interrupt in that time frame. Then kernel eventually forcibly disables the interrupt with dumping stack and printing a 'nobody cared this irq' message out. To prevent this issue, all LPC sub-nodes should enable LCLK individually so this patch adds clock control logic into the LPC KCS driver. Signed-off-by: Jae Hyun Yoo Signed-off-by: Vernon Mauery

char: ipmi: Add clock control logic into Aspeed LPC BT driver

2021-10-19T22:10:30+00:00

If LPC BT driver is registered ahead of lpc-ctrl module, LPC BT block will be enabled without heart beating of LCLK until lpc-ctrl enables the LCLK. This issue causes improper handling on host interrupts when the host sends interrupt in that time frame. Then kernel eventually forcibly disables the interrupt with dumping stack and printing a 'nobody cared this irq' message out. To prevent this issue, all LPC sub-nodes should enable LCLK individually so this patch adds clock control logic into the LPC BT driver. Signed-off-by: Jae Hyun Yoo Signed-off-by: Vernon Mauery

Add bus-timeout-ms and #retries device tree properties

2021-10-19T22:10:30+00:00

BMC uses I2C bus 7 as a PMBus channel to communicate with PSUs, also ME uses this bus as SMLink to control PSUs so this bus is managed by multi-masters. In this use case, some arbitration errors are expected so we need to add retry logic. And PMBus subsystem uses I2C bus in kernel internally so retry logic should be supported in kernel level. To support the use case, this commit adds 'bus-timeout-ms' and '#retries' device tree properties to set the bus specific parameters at kernel boot time without using any additional ioctls from user space. This patch would not be accepted by I2C maintainer in linux upstream because he doesn't like adding these legacy properties into device tree, so keep it only in downstream. Signed-off-by: Jae Hyun Yoo

Implement a memory driver share memory

2021-10-19T22:10:30+00:00

Implement a memory driver for BMC to access VGA share memory. The driver is used by MDRV2. In MDRV2 BIOS will send whole SMBIOS table to VGA memory and BMC can get the table from VGA memory through this driver. Signed-off-by: Cheng C Yang

Aspeed LPC SIO driver

2021-10-19T22:10:30+00:00

Add lpc sio device driver for AST2500/2400 Signed-off-by: Yong Li Signed-off-by: Jae Hyun Yoo