From mboxrd@z Thu Jan 1 00:00:00 1970 From: nicolas.pitre@linaro.org (Nicolas Pitre) Date: Wed, 09 Jan 2013 19:20:51 -0500 Subject: [PATCH 16/16] ARM: vexpress/dcscb: probe via device tree In-Reply-To: <1357777251-13541-1-git-send-email-nicolas.pitre@linaro.org> References: <1357777251-13541-1-git-send-email-nicolas.pitre@linaro.org> Message-ID: <1357777251-13541-17-git-send-email-nicolas.pitre@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This allows for the DCSCB support to be compiled in and selected at run time. Signed-off-by: Nicolas Pitre --- arch/arm/mach-vexpress/dcscb.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/arch/arm/mach-vexpress/dcscb.c b/arch/arm/mach-vexpress/dcscb.c index 95a2d0df20..5990f1ff25 100644 --- a/arch/arm/mach-vexpress/dcscb.c +++ b/arch/arm/mach-vexpress/dcscb.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -22,8 +23,6 @@ #include -#define DCSCB_PHYS_BASE 0x60000000 - #define RST_HOLD0 0x0 #define RST_HOLD1 0x4 #define SYS_SWRESET 0x8 @@ -223,12 +222,16 @@ extern void dcscb_power_up_setup(void); 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"); + if (!node) + return -ENODEV; + dcscb_base= of_iomap(node, 0); if (!dcscb_base) - return -ENOMEM; + return -EINVAL; cfg = readl_relaxed(dcscb_base + DCS_CFG_R); dcscb_cluster_cpu_mask[0] = (1 << (((cfg >> 16) >> (0 << 2)) & 0xf)) - 1; dcscb_cluster_cpu_mask[1] = (1 << (((cfg >> 16) >> (1 << 2)) & 0xf)) - 1; -- 1.8.0