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authorLinus Walleij <linus.walleij@linaro.org>2012-11-02 01:20:43 +0100
committerLinus Walleij <linus.walleij@linaro.org>2012-11-16 22:26:07 +0100
commit64100a03ad0b94a45ed2753632d9dd68379ad3ac (patch)
tree2311102288e54bee4810cd435441ea4264e2344f /arch/arm
parente67ae6be734de909954e20317c38472af983b92c (diff)
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ARM: integrator: hook the CP into the SoC bus
This hooks the Integrator/CP into the SoC bus when booting from device tree, by mapping the CP controller registers first, then registering the SoC device, and then populating the device tree with the SoC device as parent. Cc: Lee Jones <lee.jones@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/boot/dts/integratorcp.dts5
-rw-r--r--arch/arm/mach-integrator/Kconfig1
-rw-r--r--arch/arm/mach-integrator/integrator_cp.c57
3 files changed, 61 insertions, 2 deletions
diff --git a/arch/arm/boot/dts/integratorcp.dts b/arch/arm/boot/dts/integratorcp.dts
index 2dd5e4e48481..8b119399025a 100644
--- a/arch/arm/boot/dts/integratorcp.dts
+++ b/arch/arm/boot/dts/integratorcp.dts
@@ -18,6 +18,11 @@
bootargs = "root=/dev/ram0 console=ttyAMA0,38400n8 earlyprintk";
};
+ cpcon {
+ /* CP controller registers */
+ reg = <0xcb000000 0x100>;
+ };
+
timer0: timer@13000000 {
compatible = "arm,sp804", "arm,primecell";
};
diff --git a/arch/arm/mach-integrator/Kconfig b/arch/arm/mach-integrator/Kconfig
index 3961942c9e11..abeff25532ab 100644
--- a/arch/arm/mach-integrator/Kconfig
+++ b/arch/arm/mach-integrator/Kconfig
@@ -20,6 +20,7 @@ config ARCH_INTEGRATOR_CP
select PLAT_VERSATILE_CLCD
select SERIAL_AMBA_PL011
select SERIAL_AMBA_PL011_CONSOLE
+ select SOC_BUS
help
Include support for the ARM(R) Integrator CP platform.
diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c
index 5b08e8e4cc83..9194a4f3339c 100644
--- a/arch/arm/mach-integrator/integrator_cp.c
+++ b/arch/arm/mach-integrator/integrator_cp.c
@@ -26,6 +26,7 @@
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
+#include <linux/sys_soc.h>
#include <mach/hardware.h>
#include <mach/platform.h>
@@ -336,10 +337,62 @@ static struct of_dev_auxdata intcp_auxdata_lookup[] __initdata = {
{ /* sentinel */ },
};
+/* Base address to the CP controller */
+static void __iomem *intcp_con_base;
+
static void __init intcp_init_of(void)
{
- of_platform_populate(NULL, of_default_bus_match_table,
- intcp_auxdata_lookup, NULL);
+ struct device_node *root;
+ struct device_node *cpcon;
+ struct device *parent;
+ struct soc_device *soc_dev;
+ struct soc_device_attribute *soc_dev_attr;
+ u32 intcp_sc_id;
+ int err;
+
+ /* Here we create an SoC device for the root node */
+ root = of_find_node_by_path("/");
+ if (!root)
+ return;
+ cpcon = of_find_node_by_path("/cpcon");
+ if (!cpcon)
+ return;
+
+ intcp_con_base = of_iomap(cpcon, 0);
+ if (!intcp_con_base)
+ return;
+
+ intcp_sc_id = readl(intcp_con_base);
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return;
+
+ err = of_property_read_string(root, "compatible",
+ &soc_dev_attr->soc_id);
+ if (err)
+ return;
+ err = of_property_read_string(root, "model", &soc_dev_attr->machine);
+ if (err)
+ return;
+ soc_dev_attr->family = "Integrator";
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c",
+ 'A' + (intcp_sc_id & 0x0f));
+
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR_OR_NULL(soc_dev)) {
+ kfree(soc_dev_attr->revision);
+ kfree(soc_dev_attr);
+ return;
+ }
+
+ parent = soc_device_to_device(soc_dev);
+
+ if (!IS_ERR_OR_NULL(parent))
+ integrator_init_sysfs(parent, intcp_sc_id);
+
+ of_platform_populate(root, of_default_bus_match_table,
+ intcp_auxdata_lookup, parent);
}
static const char * intcp_dt_board_compat[] = {