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| author |   Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2021-09-21 21:25:57 +0200 |
|---|---|---|
| committer |   Bjorn Andersson <bjorn.andersson@linaro.org> | 2021-09-27 18:37:13 -0500 |
| commit | 6cb58ea897dd1d10b1a52c16b344f112102cf7d3 (patch) | |
| tree | d14fc9c24b2b0cedf42cfb1950b0c27bcd167c3d /drivers/remoteproc/Kconfig | |
| parent | dt-bindings: remoteproc: Add the documentation for Meson AO ARC rproc (diff) | |
| download | linux-dev-6cb58ea897dd1d10b1a52c16b344f112102cf7d3.tar.xz linux-dev-6cb58ea897dd1d10b1a52c16b344f112102cf7d3.zip | |
remoteproc: meson-mx-ao-arc: Add a driver for the AO ARC remote procesor
Amlogic Meson6, Meson8, Meson8b and Meson8m2 embed an ARC core in the
Always-On (AO) power-domain. This is typically used for waking up the
ARM cores after system suspend.
The configuration is spread across three different registers:
- AO_REMAP_REG0 which must be programmed to zero, it's actual purpose
is unknown. There is a second remap register which is not used in the
vendor kernel (which served as reference for this driver).
- AO_CPU_CNTL is used to start and stop the ARC core.
- AO_SECURE_REG0 in the SECBUS2 register area with unknown purpose.
To boot the ARC core we also need to enable it's gate clock and trigger
a reset.
The actual code for this ARC core can come from an ELF binary, for
example by building the Zephyr RTOS for an ARC EM4 core and then taking
"zephyr.elf" as firmware. This executable does not have any "rsc table"
so we are skipping rproc_elf_load_rsc_table (rproc_ops.parse_fw) and
rproc_elf_find_loaded_rsc_table (rproc_ops.find_loaded_rsc_table).
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20210921192557.1610709-3-martin.blumenstingl@googlemail.com
[Fixed header file order]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc/Kconfig')
| -rw-r--r-- | drivers/remoteproc/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index f30d00a3aabe..dcb87a366ec7 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -127,6 +127,17 @@ config KEYSTONE_REMOTEPROC It's safe to say N here if you're not interested in the Keystone DSPs or just want to use a bare minimum kernel. +config MESON_MX_AO_ARC_REMOTEPROC + tristate "Amlogic Meson6/8/8b/8m2 AO ARC remote processor support" + depends on HAS_IOMEM + depends on (ARM && ARCH_MESON) || COMPILE_TEST + select GENERIC_ALLOCATOR + help + Say m or y here to have support for the AO ARC remote processor + on Amlogic Meson6/Meson8/Meson8b/Meson8m2 SoCs. This is + typically used for system suspend. + If unsure say N. + config PRU_REMOTEPROC tristate "TI PRU remoteproc support" depends on TI_PRUSS |