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path: root/hw/misc/aspeed_peci.c (follow)
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* qom: Have class_init() take a const data argumentPhilippe Mathieu-Daudé2025-04-251-1/+1
| | | | | | | | | | Mechanical change using gsed, then style manually adapted to pass checkpatch.pl script. Suggested-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20250424194905.82506-4-philmd@linaro.org>
* hw: Use device_class_set_legacy_reset() instead of opencodingPeter Maydell2024-09-131-1/+1
| | | | | | | | | | | | | Use device_class_set_legacy_reset() instead of opencoding an assignment to DeviceClass::reset. This change was produced with: spatch --macro-file scripts/cocci-macro-file.h \ --sp-file scripts/coccinelle/device-reset.cocci \ --keep-comments --smpl-spacing --in-place --dir hw Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20240830145812.1967042-8-peter.maydell@linaro.org
* hw/misc/aspeed: Add PECI controllerPeter Delevoryas2022-06-301-0/+152
This introduces a really basic PECI controller that responses to commands by always setting the response code to success and then raising an interrupt to indicate the command is done. This helps avoid getting hit with constant errors if the driver continuously attempts to send a command and keeps timing out. The AST2400 and AST2500 only included registers up to 0x5C, not 0xFC. They supported PECI 1.1, 2.0, and 3.0. The AST2600 and AST1030 support PECI 4.0, which includes more read/write buffer registers from 0x80 to 0xFC to support 64-byte mode. This patch doesn't attempt to handle that, or to create a different version of the controller for the different generations, since it's only implementing functionality that is common to all generations. The basic sequence of events is that the firmware will read and write to various registers and then trigger a command by setting the FIRE bit in the command register (similar to the I2C controller). Then the firmware waits for an interrupt from the PECI controller, expecting the interrupt status register to be filled in with info on what happened. If the command was transmitted and received successfully, then response codes from the host CPU will be found in the data buffer registers. Signed-off-by: Peter Delevoryas <pdel@fb.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Message-Id: <20220630045133.32251-12-me@pjd.dev> [ clg: s/sysbus_mmio_map/aspeed_mmio_map/ ] Signed-off-by: Cédric Le Goater <clg@kaod.org>