[PATCH] clk: ls1b200: add clk driver for loongson 1b

[Antony Pavlov]

On Wed, 28 Oct 2020 19:49:52 +0800
Du Huanpeng <u74147 at gmail.com> wrote:

> add "pll" and "oscillator" node to devicetree.
> 
> Signed-off-by: Du Huanpeng <u74147 at gmail.com>

...

> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
> index 7a8f010..0aceed3 100644
> --- a/arch/mips/Kconfig
> +++ b/arch/mips/Kconfig
> @@ -118,6 +118,15 @@ config MACH_MIPS_BCM47XX
>  
>  config MACH_MIPS_LOONGSON
>  	bool "Loongson-based boards"
> +	select SYS_HAS_CPU_MIPS32_R2
> +	select SYS_SUPPORTS_32BIT_KERNEL
> +	select CSRC_R4K_LIB
> +	select HAS_DEBUG_LL
> +	select COMMON_CLK
> +	select COMMON_CLK_OF_PROVIDER
> +	select CLKDEV_LOOKUP
> +	select OFTREE
> +	select GPIOLIB

I suppose that arch/mips/ changes should go to a separate patch.
E.g.:

  * PATCH 001: clk: ls1b200: add clk driver for loongson 1b
  * PATCH 002: MIPS: ls1b200: use clk driver


>  
>  config MACH_MIPS_XBURST
>  	bool "Ingenic XBurst-based boards"
> diff --git a/arch/mips/dts/loongson-ls1b.dts b/arch/mips/dts/loongson-ls1b.dts
> index 6b53311..89cce56 100644
> --- a/arch/mips/dts/loongson-ls1b.dts
> +++ b/arch/mips/dts/loongson-ls1b.dts
> @@ -6,6 +6,12 @@
>  	model = "Loongson Tech LS1B Demo Board";
>  	compatible = "loongson,ls1b";
>  
> +	oscillator: oscillator {
> +			#clock-cells = <0>;
> +			compatible = "fixed-clock";
> +			clock-frequency = <33000000>;
> +	};
> +
>  	memory at 0 {
>  		device_type = "memory";
>  		reg = <0x00000000 0x4000000>;
> diff --git a/arch/mips/dts/ls1b.dtsi b/arch/mips/dts/ls1b.dtsi
> index cb85814..8b772af 100644
> --- a/arch/mips/dts/ls1b.dtsi
> +++ b/arch/mips/dts/ls1b.dtsi
> @@ -1,3 +1,5 @@
> +#include <dt-bindings/clock/ls1b-clk.h>
> +
>  / {
>  	#address-cells = <1>;
>  	#size-cells = <1>;
> @@ -40,5 +42,12 @@
>  			clock-frequency = <83000000>;
>  			status = "disabled";
>  		};
> +
> +		pll: pll at 1fe78030 {
> +			compatible = "loongson,ls1b-pll";
> +			#clock-cells = <1>;
> +			reg = <0x1fe78030 0x8>;
> +			clocks = <&oscillator>;
> +		};
>  	};
>  };
> diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
> index 0903274..04c797e 100644
> --- a/drivers/clk/Makefile
> +++ b/drivers/clk/Makefile
> @@ -19,4 +19,5 @@ obj-$(CONFIG_ARCH_IMX)		+= imx/
>  obj-$(CONFIG_COMMON_CLK_AT91)	+= at91/
>  obj-$(CONFIG_ARCH_STM32MP)	+= clk-stm32mp1.o
>  obj-$(CONFIG_MACH_VEXPRESS)	+= vexpress/
> +obj-$(CONFIG_MACH_MIPS_LOONGSON)+= loongson/
>  obj-$(CONFIG_ARCH_LAYERSCAPE)	+= clk-qoric.o
> diff --git a/drivers/clk/loongson/Makefile b/drivers/clk/loongson/Makefile
> new file mode 100644
> index 0000000..dd76b25
> --- /dev/null
> +++ b/drivers/clk/loongson/Makefile
> @@ -0,0 +1,2 @@
> +obj-$(CONFIG_BOARD_LOONGSON_TECH_LS1B) += clk-ls1b200.o
> +
> diff --git a/drivers/clk/loongson/clk-ls1b200.c b/drivers/clk/loongson/clk-ls1b200.c
> new file mode 100644
> index 0000000..f5fabd4
> --- /dev/null
> +++ b/drivers/clk/loongson/clk-ls1b200.c
> @@ -0,0 +1,154 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2014 Antony Pavlov <antonynpavlov at gmail.com>
> + * Copyright (C) 2020 Du Huanpeng <u74147 at gmail.com>
> + *
> + * Based on the Linux ath79 clock code

Thanks for mentioning me, but I have not contributed to clk-ls1b200.c :)
Could you please remove my copyright and just write "Based on the ath79 clock code by Antony Pavlov...".


-- 
Best regards,
  Antony Pavlov