[PATCH 13/29] ARM: orion5x: switch to use the clock driver for DT platforms

[sebastian.hesselbarth@gmail.com (Sebastian Hesselbarth)]

On 04/13/2014 04:39 PM, Thomas Petazzoni wrote:
> This commit moves the Orion5x platforms using the Device Tree to use
> the recently introduced clock driver for Orion5x. To achieve that, it:
>
>   * Adds the necessary DT description of the clock.
>
>   * Selects ORION_CLK to enable the compilation of the clock driver.
>
>   * Call of_clk_init() instead of the Orion5x-specific clock
>     initialization function.
>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

I guess either this or a follow-up patch should introduce the
clocks = <&reference-to-tclk> properties mentioned earlier.

Otherwise,

Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

> ---
>   arch/arm/boot/dts/orion5x-mv88f5182.dtsi | 6 ++++++
>   arch/arm/mach-orion5x/Kconfig            | 1 +
>   arch/arm/mach-orion5x/board-dt.c         | 5 ++---
>   3 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/boot/dts/orion5x-mv88f5182.dtsi b/arch/arm/boot/dts/orion5x-mv88f5182.dtsi
> index ddfb4d1..a56f9c8 100644
> --- a/arch/arm/boot/dts/orion5x-mv88f5182.dtsi
> +++ b/arch/arm/boot/dts/orion5x-mv88f5182.dtsi
> @@ -15,6 +15,12 @@
>   		compatible = "marvell,orion5x-88f5182-mbus", "simple-bus";
>
>   		internal-regs {
> +			core_clk: core-clocks at 10030 {
> +				compatible = "marvell,mv88f5182-core-clock";
> +				reg = <0x10010 0x4>;
> +				#clock-cells = <1>;
> +			};
> +
>   			mbusc: mbus-controller at 20000 {
>   				compatible = "marvell,mbus-controller";
>   				reg = <0x20000 0x100>, <0x1500 0x20>;
> diff --git a/arch/arm/mach-orion5x/Kconfig b/arch/arm/mach-orion5x/Kconfig
> index 14f2cae..4f51132 100644
> --- a/arch/arm/mach-orion5x/Kconfig
> +++ b/arch/arm/mach-orion5x/Kconfig
> @@ -5,6 +5,7 @@ menu "Orion Implementations"
>   config ARCH_ORION5X_DT
>   	bool "Marvell Orion5x Flattened Device Tree"
>   	select USE_OF
> +	select ORION_CLK
>   	help
>   	  Say 'Y' here if you want your kernel to support the
>   	  Marvell Orion5x using flattened device tree.
> diff --git a/arch/arm/mach-orion5x/board-dt.c b/arch/arm/mach-orion5x/board-dt.c
> index f6a388a..c489661 100644
> --- a/arch/arm/mach-orion5x/board-dt.c
> +++ b/arch/arm/mach-orion5x/board-dt.c
> @@ -16,6 +16,7 @@
>   #include <linux/of_platform.h>
>   #include <linux/cpu.h>
>   #include <linux/mbus.h>
> +#include <linux/clk-provider.h>
>   #include <asm/system_misc.h>
>   #include <asm/mach/arch.h>
>   #include <asm/mach/map.h>
> @@ -43,6 +44,7 @@ static void orion5x_dt_init_early(void)
>   static void orion5x_dt_init_time(void)
>   {
>   	orion5x_timer_init();
> +	of_clk_init(NULL);
>   	BUG_ON(mvebu_mbus_dt_init());
>   }
>
> @@ -59,9 +61,6 @@ static void __init orion5x_dt_init(void)
>   	 */
>   	orion5x_setup_wins();
>
> -	/* Setup root of clk tree */
> -	clk_init();
> -
>   	/*
>   	 * Don't issue "Wait for Interrupt" instruction if we are
>   	 * running on D0 5281 silicon.
>