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authorLars Persson <lars.persson@axis.com>2016-02-11 17:06:19 +0100
committerOlof Johansson <olof@lixom.net>2016-02-24 22:55:47 +0100
commit590b460c3e1399ca50c8f1b23f041e88cf9644d5 (patch)
treee2b58dd8b1b83e634481525583aafc3a21f51aa6 /arch/arm/mach-artpec
parentMerge tag 'stm32-soc-for-v4.6-1' of git://git.kernel.org/pub/scm/linux/kernel... (diff)
downloadlinux-590b460c3e1399ca50c8f1b23f041e88cf9644d5.tar.xz
linux-590b460c3e1399ca50c8f1b23f041e88cf9644d5.zip
arm: initial machine port for artpec-6 SoC
Basic machine port for the Artpec-6 SoC from Axis Communications. Signed-off-by: Lars Persson <larper@axis.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/mach-artpec')
-rw-r--r--arch/arm/mach-artpec/Kconfig20
-rw-r--r--arch/arm/mach-artpec/Makefile1
-rw-r--r--arch/arm/mach-artpec/board-artpec6.c72
3 files changed, 93 insertions, 0 deletions
diff --git a/arch/arm/mach-artpec/Kconfig b/arch/arm/mach-artpec/Kconfig
new file mode 100644
index 000000000000..6cbe5a2eabab
--- /dev/null
+++ b/arch/arm/mach-artpec/Kconfig
@@ -0,0 +1,20 @@
+menuconfig ARCH_ARTPEC
+ bool "Axis Communications ARM based ARTPEC SoCs"
+ depends on ARCH_MULTI_V7
+
+if ARCH_ARTPEC
+
+config MACH_ARTPEC6
+ bool "Axis ARTPEC-6 ARM Cortex A9 Platform"
+ depends on ARCH_MULTI_V7
+ select ARM_AMBA
+ select ARM_GIC
+ select ARM_GLOBAL_TIMER
+ select ARM_PSCI
+ select HAVE_ARM_ARCH_TIMER
+ select HAVE_ARM_SCU
+ select HAVE_ARM_TWD if SMP
+ help
+ Support for Axis ARTPEC-6 ARM Cortex A9 Platform
+
+endif
diff --git a/arch/arm/mach-artpec/Makefile b/arch/arm/mach-artpec/Makefile
new file mode 100644
index 000000000000..78325f0c859c
--- /dev/null
+++ b/arch/arm/mach-artpec/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_MACH_ARTPEC6) := board-artpec6.o
diff --git a/arch/arm/mach-artpec/board-artpec6.c b/arch/arm/mach-artpec/board-artpec6.c
new file mode 100644
index 000000000000..71513df3374e
--- /dev/null
+++ b/arch/arm/mach-artpec/board-artpec6.c
@@ -0,0 +1,72 @@
+/*
+ * ARTPEC-6 device support.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/amba/bus.h>
+#include <linux/clocksource.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/arm-gic.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_platform.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/clk-provider.h>
+#include <linux/regmap.h>
+#include <linux/smp.h>
+#include <asm/smp_scu.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/psci.h>
+#include <linux/arm-smccc.h>
+
+
+#define ARTPEC6_DMACFG_REGNUM 0x10
+#define ARTPEC6_DMACFG_UARTS_BURST 0xff
+
+#define SECURE_OP_L2C_WRITEREG 0xb4000001
+
+static void __init artpec6_init_machine(void)
+{
+ struct regmap *regmap;
+
+ regmap = syscon_regmap_lookup_by_compatible("axis,artpec6-syscon");
+
+ if (!IS_ERR(regmap)) {
+ /* Use PL011 DMA Burst Request signal instead of DMA
+ * Single Request
+ */
+ regmap_write(regmap, ARTPEC6_DMACFG_REGNUM,
+ ARTPEC6_DMACFG_UARTS_BURST);
+ };
+
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static void artpec6_l2c310_write_sec(unsigned long val, unsigned reg)
+{
+ struct arm_smccc_res res;
+
+ arm_smccc_smc(SECURE_OP_L2C_WRITEREG, reg, val, 0,
+ 0, 0, 0, 0, &res);
+
+ WARN_ON(res.a0);
+}
+
+static const char * const artpec6_dt_match[] = {
+ "axis,artpec6",
+ NULL
+};
+
+DT_MACHINE_START(ARTPEC6, "Axis ARTPEC-6 Platform")
+ .l2c_aux_val = 0x0C000000,
+ .l2c_aux_mask = 0xF3FFFFFF,
+ .l2c_write_sec = artpec6_l2c310_write_sec,
+ .init_machine = artpec6_init_machine,
+ .dt_compat = artpec6_dt_match,
+MACHINE_END