Mule is an MCU that emulates a set of I2C devices which are reachable
through an I2C-mux that is implemented in a different patch-series[1].
Device #2 on the mux is an emulation of NVRAM (PCF8570 I2C interface)
with a size of 8 bytes.
Device #3 on the mux is an emulation of a read-only NVRAM (PCF8570 I2C
interface) with a size of 32 bytes. This memory contains information
relevant to the Mule firmware.
+-----------------------------------------------+
| Mule |
| +---------------+ |
----+----->|Config register| |
| | +--------|------+ |
| | | |
| | V |
| | __ +--------------+ |
| | | \-------->| amc6821 | |
| | | | +--------------+ |
| | | M |-------->| PWM over I2C | |
| +------------->| U | +--------------+ |
| | X |-------->| NVRAM | |
| | | +--------------+ |
| | /-------->| ROM | |
| |__/ +--------------+ |
+-----------------------------------------------+
This patch-series adds support for the NVRAM and ROM on rk3399-puma-haikou,
px30-ringneck-haikou, rk3588-tiger-haikou and rk3588-jaguar boards.
This patch-series can only be merged after [1].
[1] https://lore.kernel.org/lkml/20240506-dev-mule-i2c-mux-v2-0-a91c954f65d7@xxxxxxxxx/
Signed-off-by: Farouk Bouabid <farouk.bouabid@xxxxxxxxx>
---
Farouk Bouabid (4):
arm64: dts: rockchip: add mule nvram/rom to rk3399-puma
arm64: dts: rockchip: add mule nvram/rom to px30-ringneck
arm64: dts: rockchip: add mule nvram/rom to rk3588-tiger
arm64: dts: rockchip: add mule nvram/rom to rk3588-jaguar
arch/arm64/boot/dts/rockchip/px30-ringneck.dtsi | 45 +++++++++++++++++++++++++
arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi | 45 +++++++++++++++++++++++++
arch/arm64/boot/dts/rockchip/rk3588-jaguar.dts | 45 +++++++++++++++++++++++++
arch/arm64/boot/dts/rockchip/rk3588-tiger.dtsi | 45 +++++++++++++++++++++++++
4 files changed, 180 insertions(+)
---
base-commit: 2917aef27decdfc367f37f599a613255c98c2c26
change-id: 20240531-nvmem-fd2902430de5
Best regards,
--
Farouk Bouabid <farouk.bouabid@xxxxxxxxx>
