kernel/arch/powerpc/boot/dts/microwatt.dts, branch linux-6.2.y

powerpc/microwatt: Add litesd

2022-11-24T12:31:48Z

This is the register layout of the litesd peripheral for the fusesoc based Microwatt SoC. It requires a description of the system clock, which is hardcoded to 100MHz. Signed-off-by: Joel Stanley Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220930065012.2860577-1-joel@jms.id.au

powerpc/microwatt: Add mmu bits to device tree

2022-05-22T05:59:54Z

In commit 5402e239d09f ("powerpc/64s: Get LPID bit width from device tree") the kernel tried to determine the pid and lpid bits from the device tree. If they are not found, there is a fallback, but Microwatt wasn't covered as it has the unusual configuration of being both !HV and bare metal. Set the values in the device tree to avoid having to add a special case. The lpid value is the only one required, but add both for completeness. Fixes: 5402e239d09f ("powerpc/64s: Get LPID bit width from device tree") Signed-off-by: Joel Stanley Acked-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220519125706.593532-1-joel@jms.id.au

powerpc/microwatt: Add Ethernet to device tree

2021-08-26T14:56:53Z

The liteeth network device is used in the Microwatt soc. Signed-off-by: Joel Stanley Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210826122653.3236867-2-joel@jms.id.au

powerpc/microwatt: Use standard 16550 UART for console

2021-06-21T11:16:31Z

This adds support to the Microwatt platform to use the standard 16550-style UART which available in the standalone Microwatt FPGA. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras Reviewed-by: Segher Boessenkool Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/YMwXGCTzedpQje7r@thinks.paulus.ozlabs.org

powerpc/xics: Add a native ICS backend for microwatt

2021-06-21T11:15:58Z

This is a simple native ICS backend that matches the layout of the Microwatt implementation of ICS. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras Reviewed-by: Segher Boessenkool [mpe: Add empty ics_native_init() to unbreak non-microwatt builds] Signed-off-by: Michael Ellerman fixup-ics Link: https://lore.kernel.org/r/YMwW8cxrwB2W5EUN@thinks.paulus.ozlabs.org

powerpc/microwatt: Populate platform bus from device-tree

2021-06-21T11:15:26Z

Just like any other embedded platform. Add an empty soc node. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras Reviewed-by: Segher Boessenkool Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/YMwWx98+PMibZq/G@thinks.paulus.ozlabs.org

powerpc: Add Microwatt device tree

2021-06-21T11:15:26Z

Microwatt currently runs with MSR[HV] = 0, hence the usable-privilege properties don't have bit 2 (for HV support) set, and we need the /chosen/ibm,architecture-vec-5 property. Signed-off-by: Paul Mackerras Reviewed-by: Segher Boessenkool Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/YMwWkPcXlGDSQ9Q3@thinks.paulus.ozlabs.org