[PATCH v2] ARM: cci driver need big endian fixes in asm code

[Nicolas Pitre]

On Tue, 15 Oct 2013, Victor Kamensky wrote:

> cci_enable_port_for_self written in asm and it works with h/w
> registers that are in little endian format. When run in big
> endian mode it needs byteswaped constants before/after it
> writes/reads to/from such registers
> 
> Signed-off-by: Victor Kamensky <victor.kamensky at linaro.org>
> Signed-off-by: Ben Dooks <ben.dooks at codethink.co.uk>

Acked-by: Nicolas Pitre <nico at linaro.org>

> ---
>  drivers/bus/arm-cci.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
> index 57b0bc6..4328c25 100644
> --- a/drivers/bus/arm-cci.c
> +++ b/drivers/bus/arm-cci.c
> @@ -872,7 +872,7 @@ asmlinkage void __naked cci_enable_port_for_self(void)
>  
>  	/* Enable the CCI port */
>  "	ldr	r0, [r0, %[offsetof_port_phys]] \n"
> -"	mov	r3, #"__stringify(CCI_ENABLE_REQ)" \n"
> +"	mov	r3, %[cci_enable_req]\n"		   
>  "	str	r3, [r0, #"__stringify(CCI_PORT_CTRL)"] \n"
>  
>  	/* poll the status reg for completion */
> @@ -880,7 +880,7 @@ asmlinkage void __naked cci_enable_port_for_self(void)
>  "	ldr	r0, [r1] \n"
>  "	ldr	r0, [r0, r1]		@ cci_ctrl_base \n"
>  "4:	ldr	r1, [r0, #"__stringify(CCI_CTRL_STATUS)"] \n"
> -"	tst	r1, #1 \n"
> +"	tst	r1, %[cci_control_status_bits] \n"			
>  "	bne	4b \n"
>  
>  "	mov	r0, #0 \n"
> @@ -893,6 +893,8 @@ asmlinkage void __naked cci_enable_port_for_self(void)
>  "7:	.word	cci_ctrl_phys - . \n"
>  	: :
>  	[sizeof_cpu_port] "i" (sizeof(cpu_port)),
> +	[cci_enable_req] "i" cpu_to_le32(CCI_ENABLE_REQ),
> +	[cci_control_status_bits] "i" cpu_to_le32(1),
>  #ifndef __ARMEB__
>  	[offsetof_cpu_port_mpidr_lsb] "i" (offsetof(struct cpu_port, mpidr)),
>  #else
> -- 
> 1.8.1.4
>