From 54e632b72e80101cf733c47ad1c419d23a8b78e7 Mon Sep 17 00:00:00 2001 From: Anup Patel Date: Wed, 7 Aug 2024 10:47:18 +0530 Subject: lib: utils: Add simple FDT based CPPC driver framework The generic platform can have multiple CPPC drivers so add a simple FDT based CPPC driver framework. Signed-off-by: Anup Patel --- lib/utils/cppc/Kconfig | 10 ++++++++++ lib/utils/cppc/fdt_cppc.c | 22 ++++++++++++++++++++++ lib/utils/cppc/fdt_cppc_drivers.carray | 3 +++ lib/utils/cppc/objects.mk | 11 +++++++++++ 4 files changed, 46 insertions(+) create mode 100644 lib/utils/cppc/Kconfig create mode 100644 lib/utils/cppc/fdt_cppc.c create mode 100644 lib/utils/cppc/fdt_cppc_drivers.carray create mode 100644 lib/utils/cppc/objects.mk (limited to 'lib/utils/cppc') diff --git a/lib/utils/cppc/Kconfig b/lib/utils/cppc/Kconfig new file mode 100644 index 0000000..08d1c97 --- /dev/null +++ b/lib/utils/cppc/Kconfig @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: BSD-2-Clause + +menu "CPPC Device Support" + +config FDT_CPPC + bool "FDT based CPPC drivers" + depends on FDT + default n + +endmenu diff --git a/lib/utils/cppc/fdt_cppc.c b/lib/utils/cppc/fdt_cppc.c new file mode 100644 index 0000000..0e1ecb2 --- /dev/null +++ b/lib/utils/cppc/fdt_cppc.c @@ -0,0 +1,22 @@ +/* + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2024 Ventana Micro Systems Inc. + * + * Authors: + * Anup Patel + */ + +#include + +/* List of FDT CPPC drivers generated at compile time */ +extern const struct fdt_driver *const fdt_cppc_drivers[]; + +void fdt_cppc_init(const void *fdt) +{ + /* + * Platforms might have multiple CPPC devices or might + * not have any so probe all and don't fail. + */ + fdt_driver_init_all(fdt, fdt_cppc_drivers); +} diff --git a/lib/utils/cppc/fdt_cppc_drivers.carray b/lib/utils/cppc/fdt_cppc_drivers.carray new file mode 100644 index 0000000..b25c788 --- /dev/null +++ b/lib/utils/cppc/fdt_cppc_drivers.carray @@ -0,0 +1,3 @@ +HEADER: sbi_utils/cppc/fdt_cppc.h +TYPE: const struct fdt_driver +NAME: fdt_cppc_drivers diff --git a/lib/utils/cppc/objects.mk b/lib/utils/cppc/objects.mk new file mode 100644 index 0000000..fb37478 --- /dev/null +++ b/lib/utils/cppc/objects.mk @@ -0,0 +1,11 @@ +# +# SPDX-License-Identifier: BSD-2-Clause +# +# Copyright (c) 2024 Ventana Micro Systems Inc. +# +# Authors: +# Anup Patel +# + +libsbiutils-objs-$(CONFIG_FDT_CPPC) += cppc/fdt_cppc.o +libsbiutils-objs-$(CONFIG_FDT_CPPC) += cppc/fdt_cppc_drivers.carray.o -- cgit v1.1