[PATCH v1 03/10] clk: add Microchip LAN966X / LAN969X generic clock controller driver

[Sascha Hauer]

On 2026-06-12 07:59, Oleksij Rempel wrote:
> Port the Microchip LAN966X Generic Clock Controller (GCK) driver from
> the Linux kernel. GCK generates and supplies clocks to peripherals on
> the LAN966X and LAN969X switch SoCs (UART, SDHCI, QSPI, SGPIO, ...).
> 
> Ported from Linux drivers/clk/clk-lan966x.c at tag v7.1-rc7
> Barebox-specific deltas:
> - probe() takes `struct device *` instead of `platform_device`
> - no devm_* - explicit kfree on probe failure
> - clk_parent_data carries both `.fw_name` (for Linux source-compat) and
>   `.name` (used by barebox at register time, since barebox's clk
>   framework does not resolve `fw_name` via clock-names).
> - Linux's `.determine_rate` is implemented here as `.round_rate`.
> 
> Signed-off-by: Oleksij Rempel <o.rempel at pengutronix.de>
> ---
>  drivers/clk/Kconfig       |   9 ++
>  drivers/clk/Makefile      |   1 +
>  drivers/clk/clk-lan966x.c | 325 ++++++++++++++++++++++++++++++++++++++
>  3 files changed, 335 insertions(+)
>  create mode 100644 drivers/clk/clk-lan966x.c
> 
> diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
> index d2a61329e125..fe7056f8971b 100644
> --- a/drivers/clk/Kconfig
> +++ b/drivers/clk/Kconfig
> @@ -84,4 +84,13 @@ config COMMON_CLK_GPIO
>  
>  source "drivers/clk/sifive/Kconfig"
>  
> +config COMMON_CLK_LAN966X
> +	bool "Generic Clock Controller driver for LAN966X SoC"
> +	depends on OFDEVICE
> +	depends on COMMON_CLK
> +	help
> +	  Microchip LAN966X and LAN969X SoC Generic Clock Controller (GCK).
> +	  GCK generates and supplies clocks to various peripherals within the
> +	  SoC.
> +
>  endif
> diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
> index 4fda2c1e0dd3..d7e06de04230 100644
> --- a/drivers/clk/Makefile
> +++ b/drivers/clk/Makefile
> @@ -33,3 +33,4 @@ obj-$(CONFIG_COMMON_CLK_SCMI)	+= clk-scmi.o
>  obj-$(CONFIG_COMMON_CLK_GPIO)   += clk-gpio.o
>  obj-$(CONFIG_TI_SCI_CLK)	+= ti-sci-clk.o
>  obj-$(CONFIG_ARCH_K3)		+= k3/
> +obj-$(CONFIG_COMMON_CLK_LAN966X)	+= clk-lan966x.o
> diff --git a/drivers/clk/clk-lan966x.c b/drivers/clk/clk-lan966x.c
> new file mode 100644
> index 000000000000..a2f43b2f8dce
> --- /dev/null
> +++ b/drivers/clk/clk-lan966x.c
> @@ -0,0 +1,325 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Microchip LAN966x SoC Clock driver.
> + *
> + * Copyright (C) 2021 Microchip Technology, Inc. and its subsidiaries
> + *
> + * Author: Kavyasree Kotagiri <kavyasree.kotagiri at microchip.com>
> + *
> + * Ported from Linux drivers/clk/clk-lan966x.c. Structure and identifiers
> + * are kept aligned with Linux so future fixes can be backported with
> + * minimal context churn.

We have a new // SPDX-Comment: Origin-URL: tag which you could use here
and other code you are adding from Linux.

Sascha

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