[PATCH 4/4] ARM: nomadik: register clocksource from device tree

[plagnioj@jcrosoft.com (Jean-Christophe PLAGNIOL-VILLARD)]

On 16:09 Sat 20 Apr     , Linus Walleij wrote:
> This switches the Nomadik platform to also registering its
> clocksource from the device tree, removing unused support
> code as we go along.
> 
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>  arch/arm/boot/dts/ste-nomadik-stn8815.dtsi | 11 ++++++++---
>  arch/arm/mach-nomadik/Kconfig              |  1 +
>  arch/arm/mach-nomadik/cpu-8815.c           |  6 +++---
>  drivers/clk/clk-nomadik.c                  | 15 ---------------
>  4 files changed, 12 insertions(+), 21 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi b/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi
> index f0df948..51a33e0 100644
> --- a/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi
> +++ b/arch/arm/boot/dts/ste-nomadik-stn8815.dtsi
> @@ -21,18 +21,23 @@
>  		cache-level = <2>;
>  	};
>  
> -	mtu0 {
> +	mtu0: mtu at 101e2000 {
>  		/* Nomadik system timer */
> +		compatible = "st,nomadik-mtu";
>  		reg = <0x101e2000 0x1000>;
>  		interrupt-parent = <&vica>;
>  		interrupts = <4>;
> +		clocks = <&timclk>, <&pclk>;
> +		clock-names = "timclk", "apb_pclk";
>  	};
>  
> -	mtu1 {
> +	mtu1: mtu at 101e3000 {
>  		/* Secondary timer */
>  		reg = <0x101e3000 0x1000>;
>  		interrupt-parent = <&vica>;
>  		interrupts = <5>;
> +		clocks = <&timclk>, <&pclk>;
> +		clock-names = "timclk", "apb_pclk";
>  	};
>  
>  	gpio0: gpio at 101e4000 {
> @@ -101,7 +106,7 @@
>  			pclk: pclk at 0 {
>  				#clock-cells = <0>;
>  				compatible = "fixed-clock";
> -				clock-frequency = <2400000>;
> +				clock-frequency = <0>;
really 0?

IIRC it's 2.4Mhz
>  			};
>  			/*
>  			 * The 2.4 MHz TIMCLK reference clock is active at
> diff --git a/arch/arm/mach-nomadik/Kconfig b/arch/arm/mach-nomadik/Kconfig
> index 8c1ccd4..4eafec3 100644
> --- a/arch/arm/mach-nomadik/Kconfig
> +++ b/arch/arm/mach-nomadik/Kconfig
> @@ -6,6 +6,7 @@ config ARCH_NOMADIK
>  	select ARM_VIC
>  	select CLKSRC_NOMADIK_MTU
>  	select CLKSRC_NOMADIK_MTU_SCHED_CLOCK
> +	select CLKSRC_OF
>  	select COMMON_CLK
>  	select CPU_ARM926T
>  	select GENERIC_CLOCKEVENTS
> diff --git a/arch/arm/mach-nomadik/cpu-8815.c b/arch/arm/mach-nomadik/cpu-8815.c
> index 0e2c5e0..e73a71f7 100644
> --- a/arch/arm/mach-nomadik/cpu-8815.c
> +++ b/arch/arm/mach-nomadik/cpu-8815.c
> @@ -29,7 +29,7 @@
>  #include <linux/platform_data/clk-nomadik.h>
>  #include <linux/platform_data/pinctrl-nomadik.h>
>  #include <linux/pinctrl/machine.h>
> -#include <linux/platform_data/clocksource-nomadik-mtu.h>
> +#include <linux/clocksource.h>
>  #include <linux/of_irq.h>
>  #include <linux/of_gpio.h>
>  #include <linux/of_address.h>
> @@ -172,7 +172,7 @@ static void __init cpu8815_timer_init_of(void)
>  	/* We need this to be up now */
>  	nomadik_clk_init();
>  
> -	mtu = of_find_node_by_path("/mtu0");
> +	mtu = of_find_node_by_path("/mtu at 101e2000");
>  	if (!mtu)
>  		return;
>  	base = of_iomap(mtu, 0);
> @@ -188,7 +188,7 @@ static void __init cpu8815_timer_init_of(void)
>  	src_cr |= SRC_CR_INIT_VAL;
>  	writel(src_cr, base);
>  
> -	nmdk_timer_init(base, irq);
> +	clocksource_of_init();
>  }
>  
>  static struct fsmc_nand_timings cpu8815_nand_timings = {
> diff --git a/drivers/clk/clk-nomadik.c b/drivers/clk/clk-nomadik.c
> index 19f197c..4a1ab27 100644
> --- a/drivers/clk/clk-nomadik.c
> +++ b/drivers/clk/clk-nomadik.c
> @@ -17,20 +17,5 @@ static const __initconst struct of_device_id cpu8815_clk_match[] = {
>  
>  void __init nomadik_clk_init(void)
>  {
> -	struct clk *clk;
> -
> -	clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 0);
> -	clk_register_clkdev(clk, "apb_pclk", NULL);
> -
> -	/*
> -	 * The 2.4 MHz TIMCLK reference clock is active at boot time, this is
> -	 * actually the MXTALCLK @19.2 MHz divided by 8. This clock is used
> -	 * by the timers and watchdog. See page 105 ff.
> -	 */
> -	clk = clk_register_fixed_rate(NULL, "TIMCLK", NULL, CLK_IS_ROOT,
> -				      2400000);
> -	clk_register_clkdev(clk, NULL, "mtu0");
> -	clk_register_clkdev(clk, NULL, "mtu1");
> -
>  	of_clk_init(cpu8815_clk_match);
>  }
> -- 
> 1.8.1.4
> 
> 
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