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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/arm/mach-mediatek
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/arm/mach-mediatek')
-rw-r--r--kernel/arch/arm/mach-mediatek/Kconfig1
-rw-r--r--kernel/arch/arm/mach-mediatek/Makefile3
-rw-r--r--kernel/arch/arm/mach-mediatek/mediatek.c27
-rw-r--r--kernel/arch/arm/mach-mediatek/platsmp.c141
4 files changed, 172 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-mediatek/Kconfig b/kernel/arch/arm/mach-mediatek/Kconfig
index 9f59e58da..aeece17e5 100644
--- a/kernel/arch/arm/mach-mediatek/Kconfig
+++ b/kernel/arch/arm/mach-mediatek/Kconfig
@@ -3,6 +3,7 @@ menuconfig ARCH_MEDIATEK
select ARM_GIC
select PINCTRL
select MTK_TIMER
+ select MFD_SYSCON
help
Support for Mediatek MT65xx & MT81xx SoCs
diff --git a/kernel/arch/arm/mach-mediatek/Makefile b/kernel/arch/arm/mach-mediatek/Makefile
index 43e619f56..21164605b 100644
--- a/kernel/arch/arm/mach-mediatek/Makefile
+++ b/kernel/arch/arm/mach-mediatek/Makefile
@@ -1 +1,4 @@
+ifeq ($(CONFIG_SMP),y)
+obj-$(CONFIG_ARCH_MEDIATEK) += platsmp.o
+endif
obj-$(CONFIG_ARCH_MEDIATEK) += mediatek.o
diff --git a/kernel/arch/arm/mach-mediatek/mediatek.c b/kernel/arch/arm/mach-mediatek/mediatek.c
index a95490050..d019a080a 100644
--- a/kernel/arch/arm/mach-mediatek/mediatek.c
+++ b/kernel/arch/arm/mach-mediatek/mediatek.c
@@ -16,6 +16,32 @@
*/
#include <linux/init.h>
#include <asm/mach/arch.h>
+#include <linux/of.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+
+
+#define GPT6_CON_MT65xx 0x10008060
+#define GPT_ENABLE 0x31
+
+static void __init mediatek_timer_init(void)
+{
+ void __iomem *gpt_base;
+
+ if (of_machine_is_compatible("mediatek,mt6589") ||
+ of_machine_is_compatible("mediatek,mt8135") ||
+ of_machine_is_compatible("mediatek,mt8127")) {
+ /* turn on GPT6 which ungates arch timer clocks */
+ gpt_base = ioremap(GPT6_CON_MT65xx, 0x04);
+
+ /* enable clock and set to free-run */
+ writel(GPT_ENABLE, gpt_base);
+ iounmap(gpt_base);
+ }
+
+ of_clk_init(NULL);
+ clocksource_probe();
+};
static const char * const mediatek_board_dt_compat[] = {
"mediatek,mt6589",
@@ -27,4 +53,5 @@ static const char * const mediatek_board_dt_compat[] = {
DT_MACHINE_START(MEDIATEK_DT, "Mediatek Cortex-A7 (Device Tree)")
.dt_compat = mediatek_board_dt_compat,
+ .init_time = mediatek_timer_init,
MACHINE_END
diff --git a/kernel/arch/arm/mach-mediatek/platsmp.c b/kernel/arch/arm/mach-mediatek/platsmp.c
new file mode 100644
index 000000000..8141f3f8a
--- /dev/null
+++ b/kernel/arch/arm/mach-mediatek/platsmp.c
@@ -0,0 +1,141 @@
+/*
+ * arch/arm/mach-mediatek/platsmp.c
+ *
+ * Copyright (c) 2014 Mediatek Inc.
+ * Author: Shunli Wang <shunli.wang@mediatek.com>
+ * Yingjoe Chen <yingjoe.chen@mediatek.com>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#include <linux/io.h>
+#include <linux/memblock.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/string.h>
+#include <linux/threads.h>
+
+#define MTK_MAX_CPU 8
+#define MTK_SMP_REG_SIZE 0x1000
+
+struct mtk_smp_boot_info {
+ unsigned long smp_base;
+ unsigned int jump_reg;
+ unsigned int core_keys[MTK_MAX_CPU - 1];
+ unsigned int core_regs[MTK_MAX_CPU - 1];
+};
+
+static const struct mtk_smp_boot_info mtk_mt8135_tz_boot = {
+ 0x80002000, 0x3fc,
+ { 0x534c4131, 0x4c415332, 0x41534c33 },
+ { 0x3f8, 0x3f8, 0x3f8 },
+};
+
+static const struct mtk_smp_boot_info mtk_mt6589_boot = {
+ 0x10002000, 0x34,
+ { 0x534c4131, 0x4c415332, 0x41534c33 },
+ { 0x38, 0x3c, 0x40 },
+};
+
+static const struct of_device_id mtk_tz_smp_boot_infos[] __initconst = {
+ { .compatible = "mediatek,mt8135", .data = &mtk_mt8135_tz_boot },
+ { .compatible = "mediatek,mt8127", .data = &mtk_mt8135_tz_boot },
+};
+
+static const struct of_device_id mtk_smp_boot_infos[] __initconst = {
+ { .compatible = "mediatek,mt6589", .data = &mtk_mt6589_boot },
+};
+
+static void __iomem *mtk_smp_base;
+static const struct mtk_smp_boot_info *mtk_smp_info;
+
+static int mtk_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ if (!mtk_smp_base)
+ return -EINVAL;
+
+ if (!mtk_smp_info->core_keys[cpu-1])
+ return -EINVAL;
+
+ writel_relaxed(mtk_smp_info->core_keys[cpu-1],
+ mtk_smp_base + mtk_smp_info->core_regs[cpu-1]);
+
+ arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+
+ return 0;
+}
+
+static void __init __mtk_smp_prepare_cpus(unsigned int max_cpus, int trustzone)
+{
+ int i, num;
+ const struct of_device_id *infos;
+
+ if (trustzone) {
+ num = ARRAY_SIZE(mtk_tz_smp_boot_infos);
+ infos = mtk_tz_smp_boot_infos;
+ } else {
+ num = ARRAY_SIZE(mtk_smp_boot_infos);
+ infos = mtk_smp_boot_infos;
+ }
+
+ /* Find smp boot info for this SoC */
+ for (i = 0; i < num; i++) {
+ if (of_machine_is_compatible(infos[i].compatible)) {
+ mtk_smp_info = infos[i].data;
+ break;
+ }
+ }
+
+ if (!mtk_smp_info) {
+ pr_err("%s: Device is not supported\n", __func__);
+ return;
+ }
+
+ if (trustzone) {
+ /* smp_base(trustzone-bootinfo) is reserved by device tree */
+ mtk_smp_base = phys_to_virt(mtk_smp_info->smp_base);
+ } else {
+ mtk_smp_base = ioremap(mtk_smp_info->smp_base, MTK_SMP_REG_SIZE);
+ if (!mtk_smp_base) {
+ pr_err("%s: Can't remap %lx\n", __func__,
+ mtk_smp_info->smp_base);
+ return;
+ }
+ }
+
+ /*
+ * write the address of slave startup address into the system-wide
+ * jump register
+ */
+ writel_relaxed(virt_to_phys(secondary_startup_arm),
+ mtk_smp_base + mtk_smp_info->jump_reg);
+}
+
+static void __init mtk_tz_smp_prepare_cpus(unsigned int max_cpus)
+{
+ __mtk_smp_prepare_cpus(max_cpus, 1);
+}
+
+static void __init mtk_smp_prepare_cpus(unsigned int max_cpus)
+{
+ __mtk_smp_prepare_cpus(max_cpus, 0);
+}
+
+static struct smp_operations mt81xx_tz_smp_ops __initdata = {
+ .smp_prepare_cpus = mtk_tz_smp_prepare_cpus,
+ .smp_boot_secondary = mtk_boot_secondary,
+};
+CPU_METHOD_OF_DECLARE(mt81xx_tz_smp, "mediatek,mt81xx-tz-smp", &mt81xx_tz_smp_ops);
+
+static struct smp_operations mt6589_smp_ops __initdata = {
+ .smp_prepare_cpus = mtk_smp_prepare_cpus,
+ .smp_boot_secondary = mtk_boot_secondary,
+};
+CPU_METHOD_OF_DECLARE(mt6589_smp, "mediatek,mt6589-smp", &mt6589_smp_ops);