Messages in this thread Patch in this message | | | From | Cristian Ciocaltea <> | Subject | [PATCH 1/1] ARM: owl: Add Actions Semi Owl S500 SoC machine | Date | Thu, 11 Mar 2021 21:19:58 +0200 |
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Add machine entry for the S500 variant of the Actions Semi Owl SoCs family.
For the moment the only purpose is to provide the system serial information which will be used by the Owl Ethernet MAC driver to generate a stable MAC address.
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com> --- arch/arm/mach-actions/Makefile | 1 + arch/arm/mach-actions/actions.c | 44 +++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) create mode 100644 arch/arm/mach-actions/actions.c
diff --git a/arch/arm/mach-actions/Makefile b/arch/arm/mach-actions/Makefile index 8eae9587fe82..31865c958d92 100644 --- a/arch/arm/mach-actions/Makefile +++ b/arch/arm/mach-actions/Makefile @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only +obj-${CONFIG_ARCH_ACTIONS} += actions.o obj-${CONFIG_SMP} += platsmp.o diff --git a/arch/arm/mach-actions/actions.c b/arch/arm/mach-actions/actions.c new file mode 100644 index 000000000000..306c6bb178fe --- /dev/null +++ b/arch/arm/mach-actions/actions.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Actions Semi Owl SoCs + * + * Copyright (c) 2012 Actions Semi Inc. + * Copyright (c) 2021 Cristian Ciocaltea <cristian.ciocaltea@gmail.com> + */ + +#include <linux/highmem.h> +#include <linux/of_platform.h> + +#include <asm/mach/arch.h> +#include <asm/system_info.h> + +#define OWL_S500_SERIAL_LOW_PAGE_OFF 0x800 +#define OWL_S500_SERIAL_HIGH_PAGE_OFF 0x804 + +static const char *const owl_s500_dt_compat[] __initconst = { + "actions,s500", + NULL, +}; + +static void __init owl_s500_get_system_serial(void) +{ + char *vddr = kmap_local_page(pfn_to_page(PFN_DOWN(0))); + + memcpy(&system_serial_low, vddr + OWL_S500_SERIAL_LOW_PAGE_OFF, + sizeof(system_serial_low)); + memcpy(&system_serial_high, vddr + OWL_S500_SERIAL_HIGH_PAGE_OFF, + sizeof(system_serial_high)); + + kunmap_local(vddr); +} + +static void __init owl_s500_init_early(void) + +{ + owl_s500_get_system_serial(); +} + +DT_MACHINE_START(ACTIONS, "Actions Semi Owl S500 SoC") + .dt_compat = owl_s500_dt_compat, + .init_early = owl_s500_init_early, +MACHINE_END -- 2.30.2
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