[U-Boot] [PATCH 07/25] SPEAr: Add basic arch related support for SPEAr SoCs

[Stefan Roese <sr@denx.de>]

On Wednesday 07 March 2012 13:03:56 Amit Virdi wrote:
> From: Vipin KUMAR <vipin.kumar@st.com>
> 
> Earlier, architecture specific init code was mixed with board
> initialization code in board/spear/... This patch updates architecture
> support for SPEAr in latest u-boot.
> 
> It defines the following two flags for SPEAr3xx and SPEAr6xx SoCs
>  - CONFIG_DISPLAY_CPUINFO: Used to print the SoC information
>  - CONFIG_ARCH_CPU_INIT: compiles the architecture specific initialization
> code with arch/arm/spear/cpu.c
> 
> Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
> Signed-off-by: Amit Virdi <amit.virdi@st.com>
> ---
>  arch/arm/cpu/arm926ejs/spear/Makefile      |    3 +-
>  arch/arm/cpu/arm926ejs/spear/cpu.c         |   84
> ++++++++++++++++++++++++++++ arch/arm/include/asm/arch-spear/spr_misc.h | 
>   7 ++
>  include/configs/spear-common.h             |    2 +
>  4 files changed, 95 insertions(+), 1 deletions(-)
>  create mode 100644 arch/arm/cpu/arm926ejs/spear/cpu.c
> 
> diff --git a/arch/arm/cpu/arm926ejs/spear/Makefile
> b/arch/arm/cpu/arm926ejs/spear/Makefile index f32ec4c..46923a4 100644
> --- a/arch/arm/cpu/arm926ejs/spear/Makefile
> +++ b/arch/arm/cpu/arm926ejs/spear/Makefile
> @@ -25,7 +25,8 @@ include $(TOPDIR)/config.mk
> 
>  LIB	= $(obj)lib$(SOC).o
> 
> -COBJS	:= reset.o \
> +COBJS	:= cpu.o \
> +	   reset.o \
>  	   timer.o
>  SOBJS	:=
> 
> diff --git a/arch/arm/cpu/arm926ejs/spear/cpu.c
> b/arch/arm/cpu/arm926ejs/spear/cpu.c new file mode 100644
> index 0000000..4dc7d69
> --- /dev/null
> +++ b/arch/arm/cpu/arm926ejs/spear/cpu.c
> @@ -0,0 +1,84 @@
> +/*
> + * (C) Copyright 2010
> + * Vipin Kumar, ST Micoelectronics, vipin.kumar at st.com.
> + *
> + * See file CREDITS for list of people who contributed to this
> + * project.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of
> + * the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
> + * MA 02111-1307 USA
> + */
> +
> +#include <common.h>
> +#include <asm/io.h>
> +#include <asm/arch/hardware.h>
> +#include <asm/arch/spr_misc.h>
> +
> +#ifdef CONFIG_ARCH_CPU_INIT

Why not remove this #ifdef here and make compile it in unconditionally? It is 
needed for each SPEAr board, right?

> +int arch_cpu_init(void)
> +{
> +	struct misc_regs *const misc_p =
> +	    (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
> +	u32 periph1_clken;
> +
> +	periph1_clken = readl(&misc_p->periph1_clken);
> +
> +#if defined(CONFIG_SPEAR3XX)
> +	periph1_clken |= MISC_GPT2ENB;
> +#elif defined(CONFIG_SPEAR600)
> +	periph1_clken |= MISC_GPT3ENB;
> +#endif
> +
> +#if defined(CONFIG_PL011_SERIAL)
> +	periph1_clken |= MISC_UART0ENB;
> +#endif
> +#if defined(CONFIG_DESIGNWARE_ETH)
> +	periph1_clken |= MISC_ETHENB;
> +#endif
> +#if defined(CONFIG_DW_UDC)
> +	periph1_clken |= MISC_USBDENB;
> +#endif
> +#if defined(CONFIG_DW_I2C)
> +	periph1_clken |= MISC_I2CENB;
> +#endif
> +#if defined(CONFIG_ST_SMI)
> +	periph1_clken |= MISC_SMIENB;
> +#endif
> +#if defined(CONFIG_NAND_FSMC)
> +	periph1_clken |= MISC_FSMCENB;
> +#endif
> +
> +	writel(periph1_clken, &misc_p->periph1_clken);
> +	return 0;
> +}
> +#endif
> +
> +#ifdef CONFIG_DISPLAY_CPUINFO

Again, I would remove this #ifdef here. Make it unconditionally for all SPEAr 
boards. We have enough #ifdef's already. :)

> +int print_cpuinfo(void)
> +{
> +#ifdef CONFIG_SPEAR300
> +	printf("CPU:   SPEAr300\n");
> +#elif defined(CONFIG_SPEAR310)
> +	printf("CPU:   SPEAr310\n");
> +#elif defined(CONFIG_SPEAR320)
> +	printf("CPU:   SPEAr320\n");
> +#elif defined(CONFIG_SPEAR600)
> +	printf("CPU:   SPEAr600\n");
> +#else
> +#error CPU not supported in spear platform
> +#endif
> +	return 0;
> +}
> +#endif
> diff --git a/arch/arm/include/asm/arch-spear/spr_misc.h
> b/arch/arm/include/asm/arch-spear/spr_misc.h index 8b96d9b..b10c726 100644
> --- a/arch/arm/include/asm/arch-spear/spr_misc.h
> +++ b/arch/arm/include/asm/arch-spear/spr_misc.h
> @@ -126,5 +126,12 @@ struct misc_regs {
> 
>  /* PERIPH1_CLKEN, PERIPH1_RST value */
>  #define MISC_USBDENB			0x01000000
> +#define MISC_ETHENB			0x00800000
> +#define MISC_SMIENB			0x00200000
> +#define MISC_GPT3ENB			0x00010000
> +#define MISC_GPT2ENB			0x00000800
> +#define MISC_FSMCENB			0x00000200
> +#define MISC_I2CENB			0x00000080
> +#define MISC_UART0ENB			0x00000008
> 
>  #endif
> diff --git a/include/configs/spear-common.h
> b/include/configs/spear-common.h index 3f52442..5540630 100644
> --- a/include/configs/spear-common.h
> +++ b/include/configs/spear-common.h
> @@ -182,6 +182,8 @@
>  #define CONFIG_ENV_SIZE				0x02000
> 
>  /* Miscellaneous configurable options */
> +#define CONFIG_ARCH_CPU_INIT
> +#define CONFIG_DISPLAY_CPUINFO

Other than my comment above:

Acked-by: Stefan Roese <sr@denx.de>

Thanks,
Stefan

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