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authorShawn Guo <shawn.guo@linaro.org>2011-09-06 14:39:44 +0800
committerArnd Bergmann <arnd@arndb.de>2011-10-31 14:26:23 +0100
commit9fbbe6890c88aa332efe61d5894108dd8b932530 (patch)
treeb27bedc317d68e969e9220cb93de8bc9fc5c62e8 /arch/arm/mach-imx/src.c
parent1103643c266ae45c7098e0f7f3ee0b68e3e7c7cc (diff)
downloadop-kernel-dev-9fbbe6890c88aa332efe61d5894108dd8b932530.zip
op-kernel-dev-9fbbe6890c88aa332efe61d5894108dd8b932530.tar.gz
arm/imx6q: add core drivers clock, gpc, mmdc and src
It adds a number of core drivers support for imx6q, including clock, General Power Controller (gpc), Multi Mode DDR Controller(mmdc) and System Reset Controller (src). Signed-off-by: Ranjani Vaidyanathan <ra5478@freescale.com> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Diffstat (limited to 'arch/arm/mach-imx/src.c')
-rw-r--r--arch/arm/mach-imx/src.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/src.c b/arch/arm/mach-imx/src.c
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+++ b/arch/arm/mach-imx/src.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ * Copyright 2011 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <asm/unified.h>
+
+#define SRC_SCR 0x000
+#define SRC_GPR1 0x020
+#define BP_SRC_SCR_CORE1_RST 14
+#define BP_SRC_SCR_CORE1_ENABLE 22
+
+static void __iomem *src_base;
+
+void imx_enable_cpu(int cpu, bool enable)
+{
+ u32 mask, val;
+
+ mask = 1 << (BP_SRC_SCR_CORE1_ENABLE + cpu - 1);
+ val = readl_relaxed(src_base + SRC_SCR);
+ val = enable ? val | mask : val & ~mask;
+ writel_relaxed(val, src_base + SRC_SCR);
+}
+
+void imx_set_cpu_jump(int cpu, void *jump_addr)
+{
+ writel_relaxed(BSYM(virt_to_phys(jump_addr)),
+ src_base + SRC_GPR1 + cpu * 8);
+}
+
+void __init imx_src_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-src");
+ src_base = of_iomap(np, 0);
+ WARN_ON(!src_base);
+}
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