[PATCH v3 15/15] ARM: vexpress/dcscb: probe via device tree
Rob Herring
robherring2 at gmail.com
Tue Jan 29 16:01:33 EST 2013
On 01/29/2013 01:51 AM, Nicolas Pitre wrote:
> This allows for the DCSCB support to be compiled in and selected
> at run time.
Shouldn't this just be rolled into the commit creating dcscb.c?
> Signed-off-by: Nicolas Pitre <nico at linaro.org>
> ---
> arch/arm/mach-vexpress/dcscb.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/mach-vexpress/dcscb.c b/arch/arm/mach-vexpress/dcscb.c
> index 58051ffafb..a724507cbc 100644
> --- a/arch/arm/mach-vexpress/dcscb.c
> +++ b/arch/arm/mach-vexpress/dcscb.c
> @@ -14,6 +14,7 @@
> #include <linux/io.h>
> #include <linux/spinlock.h>
> #include <linux/errno.h>
> +#include <linux/of_address.h>
> #include <linux/vexpress.h>
> #include <linux/arm-cci.h>
>
> @@ -24,8 +25,6 @@
> #include <asm/cp15.h>
>
>
> -#define DCSCB_PHYS_BASE 0x60000000
> -
> #define RST_HOLD0 0x0
> #define RST_HOLD1 0x4
> #define SYS_SWRESET 0x8
> @@ -215,10 +214,14 @@ extern void dcscb_power_up_setup(unsigned int affinity_level);
>
> static int __init dcscb_init(void)
> {
> + struct device_node *node;
> unsigned int cfg;
> int ret;
>
> - dcscb_base = ioremap(DCSCB_PHYS_BASE, 0x1000);
> + node = of_find_compatible_node(NULL, NULL, "arm,dcscb");
This needs binding documentation and should be a more specific name. Not
knowing what dcscb is, I don't have a suggestion. Perhaps should include
vexpress or specific core tile name it is part of.
Rob
> + if (!node)
> + return -ENODEV;
> + dcscb_base= of_iomap(node, 0);
> if (!dcscb_base)
> return -EADDRNOTAVAIL;
> cfg = readl_relaxed(dcscb_base + DCS_CFG_R);
>
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