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authorLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 18:40:49 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 18:40:49 -0800
commitdfd10e7ae60c6c1b24b5d601744b4fd1ecab2f31 (patch)
tree59fc5ee5877a4dcb4bd56d2e0d0272089496dba1 /arch/arm/mach-sunxi
parentf2c73464d7b399cf4e0c601c1c7d7b079080fa52 (diff)
parent6373bb71875b3f9f73f375952f92e68140b75657 (diff)
downloadlinux-dfd10e7ae60c6c1b24b5d601744b4fd1ecab2f31.tar.bz2
Merge tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform changes from Olof Johansson: "New core SoC-specific changes. New platforms: * Introduction of a vendor, Hisilicon, and one of their SoCs with some random numerical product name. * Introduction of EFM32, embedded platform from Silicon Labs (ARMv7m, i.e. !MMU). * Marvell Berlin series of SoCs, which include the one in Chromecast. * MOXA platform support, ARM9-based platform used mostly in industrial products * Support for Freescale's i.MX50 SoC. Other work: * Renesas work for new platforms and drivers, and conversion over to more multiplatform-friendly device registration schemes. * SMP support for Allwinner sunxi platforms. * ... plus a bunch of other stuff across various platforms" * tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (201 commits) ARM: tegra: fix tegra_powergate_sequence_power_up() inline ARM: msm_defconfig: Update for multi-platform ARM: msm: Move MSM's DT based hardware to multi-platform support ARM: msm: Only build timer.c if required ARM: msm: Only build clock.c on proc_comm based platforms ARM: ux500: Enable system suspend with WFI support ARM: ux500: turn on PRINTK_TIME in u8500_defconfig ARM: shmobile: r8a7790: Fix I2C controller names ARM: msm: Simplify ARCH_MSM_DT config ARM: msm: Add support for MSM8974 SoC ARM: sunxi: select ARM_PSCI MAINTAINERS: Update Allwinner sunXi maintainer files ARM: sunxi: Select RESET_CONTROLLER ARM: imx: improve the comment of CCM lpm SW workaround ARM: imx: improve status check of clock gate ARM: imx: add necessary interface for pfd ARM: imx_v6_v7_defconfig: Select CONFIG_REGULATOR_PFUZE100 ARM: imx_v6_v7_defconfig: Select MX35 and MX50 device tree support ARM: imx: Add cpu frequency scaling support ARM i.MX35: Add devicetree support. ...
Diffstat (limited to 'arch/arm/mach-sunxi')
-rw-r--r--arch/arm/mach-sunxi/Kconfig3
-rw-r--r--arch/arm/mach-sunxi/Makefile1
-rw-r--r--arch/arm/mach-sunxi/common.h19
-rw-r--r--arch/arm/mach-sunxi/headsmp.S9
-rw-r--r--arch/arm/mach-sunxi/platsmp.c124
-rw-r--r--arch/arm/mach-sunxi/sunxi.c14
6 files changed, 170 insertions, 0 deletions
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index bce0d4277f71..b9d6cad8669b 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -1,7 +1,9 @@
config ARCH_SUNXI
bool "Allwinner A1X SOCs" if ARCH_MULTI_V7
+ select ARCH_HAS_RESET_CONTROLLER
select ARCH_REQUIRE_GPIOLIB
select ARM_GIC
+ select ARM_PSCI
select CLKSRC_MMIO
select CLKSRC_OF
select COMMON_CLK
@@ -10,6 +12,7 @@ config ARCH_SUNXI
select HAVE_SMP
select PINCTRL
select PINCTRL_SUNXI
+ select RESET_CONTROLLER
select SPARSE_IRQ
select SUN4I_TIMER
select SUN5I_HSTIMER
diff --git a/arch/arm/mach-sunxi/Makefile b/arch/arm/mach-sunxi/Makefile
index 93bebfc3ff9f..d9397202d6ec 100644
--- a/arch/arm/mach-sunxi/Makefile
+++ b/arch/arm/mach-sunxi/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_ARCH_SUNXI) += sunxi.o
+obj-$(CONFIG_SMP) += platsmp.o headsmp.o
diff --git a/arch/arm/mach-sunxi/common.h b/arch/arm/mach-sunxi/common.h
new file mode 100644
index 000000000000..9e5ac4756cbb
--- /dev/null
+++ b/arch/arm/mach-sunxi/common.h
@@ -0,0 +1,19 @@
+/*
+ * Core functions for Allwinner SoCs
+ *
+ * Copyright (C) 2013 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __ARCH_SUNXI_COMMON_H_
+#define __ARCH_SUNXI_COMMON_H_
+
+void sun6i_secondary_startup(void);
+extern struct smp_operations sun6i_smp_ops;
+
+#endif /* __ARCH_SUNXI_COMMON_H_ */
diff --git a/arch/arm/mach-sunxi/headsmp.S b/arch/arm/mach-sunxi/headsmp.S
new file mode 100644
index 000000000000..a10d494fb37b
--- /dev/null
+++ b/arch/arm/mach-sunxi/headsmp.S
@@ -0,0 +1,9 @@
+#include <linux/linkage.h>
+#include <linux/init.h>
+
+ .section ".text.head", "ax"
+
+ENTRY(sun6i_secondary_startup)
+ msr cpsr_fsxc, #0xd3
+ b secondary_startup
+ENDPROC(sun6i_secondary_startup)
diff --git a/arch/arm/mach-sunxi/platsmp.c b/arch/arm/mach-sunxi/platsmp.c
new file mode 100644
index 000000000000..7b141d8342a1
--- /dev/null
+++ b/arch/arm/mach-sunxi/platsmp.c
@@ -0,0 +1,124 @@
+/*
+ * SMP support for Allwinner SoCs
+ *
+ * Copyright (C) 2013 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * Based on code
+ * Copyright (C) 2012-2013 Allwinner Ltd.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/memory.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/smp.h>
+
+#include "common.h"
+
+#define CPUCFG_CPU_PWR_CLAMP_STATUS_REG(cpu) ((cpu) * 0x40 + 0x64)
+#define CPUCFG_CPU_RST_CTRL_REG(cpu) (((cpu) + 1) * 0x40)
+#define CPUCFG_CPU_CTRL_REG(cpu) (((cpu) + 1) * 0x40 + 0x04)
+#define CPUCFG_CPU_STATUS_REG(cpu) (((cpu) + 1) * 0x40 + 0x08)
+#define CPUCFG_GEN_CTRL_REG 0x184
+#define CPUCFG_PRIVATE0_REG 0x1a4
+#define CPUCFG_PRIVATE1_REG 0x1a8
+#define CPUCFG_DBG_CTL0_REG 0x1e0
+#define CPUCFG_DBG_CTL1_REG 0x1e4
+
+#define PRCM_CPU_PWROFF_REG 0x100
+#define PRCM_CPU_PWR_CLAMP_REG(cpu) (((cpu) * 4) + 0x140)
+
+static void __iomem *cpucfg_membase;
+static void __iomem *prcm_membase;
+
+static DEFINE_SPINLOCK(cpu_lock);
+
+static void __init sun6i_smp_prepare_cpus(unsigned int max_cpus)
+{
+ struct device_node *node;
+
+ node = of_find_compatible_node(NULL, NULL, "allwinner,sun6i-a31-prcm");
+ if (!node) {
+ pr_err("Missing A31 PRCM node in the device tree\n");
+ return;
+ }
+
+ prcm_membase = of_iomap(node, 0);
+ if (!prcm_membase) {
+ pr_err("Couldn't map A31 PRCM registers\n");
+ return;
+ }
+
+ node = of_find_compatible_node(NULL, NULL,
+ "allwinner,sun6i-a31-cpuconfig");
+ if (!node) {
+ pr_err("Missing A31 CPU config node in the device tree\n");
+ return;
+ }
+
+ cpucfg_membase = of_iomap(node, 0);
+ if (!cpucfg_membase)
+ pr_err("Couldn't map A31 CPU config registers\n");
+
+}
+
+static int sun6i_smp_boot_secondary(unsigned int cpu,
+ struct task_struct *idle)
+{
+ u32 reg;
+ int i;
+
+ if (!(prcm_membase && cpucfg_membase))
+ return -EFAULT;
+
+ spin_lock(&cpu_lock);
+
+ /* Set CPU boot address */
+ writel(virt_to_phys(sun6i_secondary_startup),
+ cpucfg_membase + CPUCFG_PRIVATE0_REG);
+
+ /* Assert the CPU core in reset */
+ writel(0, cpucfg_membase + CPUCFG_CPU_RST_CTRL_REG(cpu));
+
+ /* Assert the L1 cache in reset */
+ reg = readl(cpucfg_membase + CPUCFG_GEN_CTRL_REG);
+ writel(reg & ~BIT(cpu), cpucfg_membase + CPUCFG_GEN_CTRL_REG);
+
+ /* Disable external debug access */
+ reg = readl(cpucfg_membase + CPUCFG_DBG_CTL1_REG);
+ writel(reg & ~BIT(cpu), cpucfg_membase + CPUCFG_DBG_CTL1_REG);
+
+ /* Power up the CPU */
+ for (i = 0; i <= 8; i++)
+ writel(0xff >> i, prcm_membase + PRCM_CPU_PWR_CLAMP_REG(cpu));
+ mdelay(10);
+
+ /* Clear CPU power-off gating */
+ reg = readl(prcm_membase + PRCM_CPU_PWROFF_REG);
+ writel(reg & ~BIT(cpu), prcm_membase + PRCM_CPU_PWROFF_REG);
+ mdelay(1);
+
+ /* Deassert the CPU core reset */
+ writel(3, cpucfg_membase + CPUCFG_CPU_RST_CTRL_REG(cpu));
+
+ /* Enable back the external debug accesses */
+ reg = readl(cpucfg_membase + CPUCFG_DBG_CTL1_REG);
+ writel(reg | BIT(cpu), cpucfg_membase + CPUCFG_DBG_CTL1_REG);
+
+ spin_unlock(&cpu_lock);
+
+ return 0;
+}
+
+struct smp_operations sun6i_smp_ops __initdata = {
+ .smp_prepare_cpus = sun6i_smp_prepare_cpus,
+ .smp_boot_secondary = sun6i_smp_boot_secondary,
+};
diff --git a/arch/arm/mach-sunxi/sunxi.c b/arch/arm/mach-sunxi/sunxi.c
index 61d3a387f01c..aeea6ceea725 100644
--- a/arch/arm/mach-sunxi/sunxi.c
+++ b/arch/arm/mach-sunxi/sunxi.c
@@ -10,6 +10,8 @@
* warranty of any kind, whether express or implied.
*/
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/init.h>
@@ -23,6 +25,8 @@
#include <asm/mach/map.h>
#include <asm/system_misc.h>
+#include "common.h"
+
#define SUN4I_WATCHDOG_CTRL_REG 0x00
#define SUN4I_WATCHDOG_CTRL_RESTART BIT(0)
#define SUN4I_WATCHDOG_MODE_REG 0x04
@@ -132,10 +136,20 @@ static const char * const sun6i_board_dt_compat[] = {
NULL,
};
+extern void __init sun6i_reset_init(void);
+static void __init sun6i_timer_init(void)
+{
+ of_clk_init(NULL);
+ sun6i_reset_init();
+ clocksource_of_init();
+}
+
DT_MACHINE_START(SUN6I_DT, "Allwinner sun6i (A31) Family")
.init_machine = sunxi_dt_init,
+ .init_time = sun6i_timer_init,
.dt_compat = sun6i_board_dt_compat,
.restart = sun6i_restart,
+ .smp = smp_ops(sun6i_smp_ops),
MACHINE_END
static const char * const sun7i_board_dt_compat[] = {