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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 /drivers
parentf2c73464d7b399cf4e0c601c1c7d7b079080fa52 (diff)
parent6373bb71875b3f9f73f375952f92e68140b75657 (diff)
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 'drivers')
-rw-r--r--drivers/Makefile2
-rw-r--r--drivers/clocksource/Makefile2
-rw-r--r--drivers/irqchip/Kconfig4
-rw-r--r--drivers/irqchip/Makefile1
-rw-r--r--drivers/irqchip/irq-dw-apb-ictl.c150
-rw-r--r--drivers/reset/Makefile1
-rw-r--r--drivers/reset/reset-sunxi.c175
7 files changed, 333 insertions, 2 deletions
diff --git a/drivers/Makefile b/drivers/Makefile
index 3cc8214f9b26..8e3b8b06c0b2 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -118,7 +118,7 @@ obj-$(CONFIG_SGI_SN) += sn/
obj-y += firmware/
obj-$(CONFIG_CRYPTO) += crypto/
obj-$(CONFIG_SUPERH) += sh/
-obj-$(CONFIG_ARCH_SHMOBILE) += sh/
+obj-$(CONFIG_ARCH_SHMOBILE_LEGACY) += sh/
ifndef CONFIG_ARCH_USES_GETTIMEOFFSET
obj-y += clocksource/
endif
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 358358d87b6d..c7ca50a9c232 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -26,7 +26,7 @@ obj-$(CONFIG_SUN5I_HSTIMER) += timer-sun5i.o
obj-$(CONFIG_ARCH_TEGRA) += tegra20_timer.o
obj-$(CONFIG_VT8500_TIMER) += vt8500_timer.o
obj-$(CONFIG_ARCH_NSPIRE) += zevio-timer.o
-obj-$(CONFIG_ARCH_BCM) += bcm_kona_timer.o
+obj-$(CONFIG_ARCH_BCM_MOBILE) += bcm_kona_timer.o
obj-$(CONFIG_CADENCE_TTC_TIMER) += cadence_ttc_timer.o
obj-$(CONFIG_CLKSRC_EFM32) += time-efm32.o
obj-$(CONFIG_CLKSRC_EXYNOS_MCT) += exynos_mct.o
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 3792a1aa52b8..940638ddc982 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -30,6 +30,10 @@ config ARM_VIC_NR
The maximum number of VICs available in the system, for
power management.
+config DW_APB_ICTL
+ bool
+ select IRQ_DOMAIN
+
config IMGPDC_IRQ
bool
select GENERIC_IRQ_CHIP
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index c60b9010b152..6427323af4c3 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_ARCH_MMP) += irq-mmp.o
obj-$(CONFIG_ARCH_MVEBU) += irq-armada-370-xp.o
obj-$(CONFIG_ARCH_MXS) += irq-mxs.o
obj-$(CONFIG_ARCH_S3C24XX) += irq-s3c24xx.o
+obj-$(CONFIG_DW_APB_ICTL) += irq-dw-apb-ictl.o
obj-$(CONFIG_METAG) += irq-metag-ext.o
obj-$(CONFIG_METAG_PERFCOUNTER_IRQS) += irq-metag.o
obj-$(CONFIG_ARCH_MOXART) += irq-moxart.o
diff --git a/drivers/irqchip/irq-dw-apb-ictl.c b/drivers/irqchip/irq-dw-apb-ictl.c
new file mode 100644
index 000000000000..31e231e1f566
--- /dev/null
+++ b/drivers/irqchip/irq-dw-apb-ictl.c
@@ -0,0 +1,150 @@
+/*
+ * Synopsys DW APB ICTL irqchip driver.
+ *
+ * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+ *
+ * based on GPL'ed 2.6 kernel sources
+ * (c) Marvell International 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/io.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#include "irqchip.h"
+
+#define APB_INT_ENABLE_L 0x00
+#define APB_INT_ENABLE_H 0x04
+#define APB_INT_MASK_L 0x08
+#define APB_INT_MASK_H 0x0c
+#define APB_INT_FINALSTATUS_L 0x30
+#define APB_INT_FINALSTATUS_H 0x34
+
+static void dw_apb_ictl_handler(unsigned int irq, struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_get_chip(irq);
+ struct irq_chip_generic *gc = irq_get_handler_data(irq);
+ struct irq_domain *d = gc->private;
+ u32 stat;
+ int n;
+
+ chained_irq_enter(chip, desc);
+
+ for (n = 0; n < gc->num_ct; n++) {
+ stat = readl_relaxed(gc->reg_base +
+ APB_INT_FINALSTATUS_L + 4 * n);
+ while (stat) {
+ u32 hwirq = ffs(stat) - 1;
+ generic_handle_irq(irq_find_mapping(d,
+ gc->irq_base + hwirq + 32 * n));
+ stat &= ~(1 << hwirq);
+ }
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static int __init dw_apb_ictl_init(struct device_node *np,
+ struct device_node *parent)
+{
+ unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
+ struct resource r;
+ struct irq_domain *domain;
+ struct irq_chip_generic *gc;
+ void __iomem *iobase;
+ int ret, nrirqs, irq;
+ u32 reg;
+
+ /* Map the parent interrupt for the chained handler */
+ irq = irq_of_parse_and_map(np, 0);
+ if (irq <= 0) {
+ pr_err("%s: unable to parse irq\n", np->full_name);
+ return -EINVAL;
+ }
+
+ ret = of_address_to_resource(np, 0, &r);
+ if (ret) {
+ pr_err("%s: unable to get resource\n", np->full_name);
+ return ret;
+ }
+
+ if (!request_mem_region(r.start, resource_size(&r), np->full_name)) {
+ pr_err("%s: unable to request mem region\n", np->full_name);
+ return -ENOMEM;
+ }
+
+ iobase = ioremap(r.start, resource_size(&r));
+ if (!iobase) {
+ pr_err("%s: unable to map resource\n", np->full_name);
+ ret = -ENOMEM;
+ goto err_release;
+ }
+
+ /*
+ * DW IP can be configured to allow 2-64 irqs. We can determine
+ * the number of irqs supported by writing into enable register
+ * and look for bits not set, as corresponding flip-flops will
+ * have been removed by sythesis tool.
+ */
+
+ /* mask and enable all interrupts */
+ writel(~0, iobase + APB_INT_MASK_L);
+ writel(~0, iobase + APB_INT_MASK_H);
+ writel(~0, iobase + APB_INT_ENABLE_L);
+ writel(~0, iobase + APB_INT_ENABLE_H);
+
+ reg = readl(iobase + APB_INT_ENABLE_H);
+ if (reg)
+ nrirqs = 32 + fls(reg);
+ else
+ nrirqs = fls(readl(iobase + APB_INT_ENABLE_L));
+
+ domain = irq_domain_add_linear(np, nrirqs,
+ &irq_generic_chip_ops, NULL);
+ if (!domain) {
+ pr_err("%s: unable to add irq domain\n", np->full_name);
+ ret = -ENOMEM;
+ goto err_unmap;
+ }
+
+ ret = irq_alloc_domain_generic_chips(domain, 32, (nrirqs > 32) ? 2 : 1,
+ np->name, handle_level_irq, clr, 0,
+ IRQ_GC_INIT_MASK_CACHE);
+ if (ret) {
+ pr_err("%s: unable to alloc irq domain gc\n", np->full_name);
+ goto err_unmap;
+ }
+
+ gc = irq_get_domain_generic_chip(domain, 0);
+ gc->private = domain;
+ gc->reg_base = iobase;
+
+ gc->chip_types[0].regs.mask = APB_INT_MASK_L;
+ gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit;
+ gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit;
+
+ if (nrirqs > 32) {
+ gc->chip_types[1].regs.mask = APB_INT_MASK_H;
+ gc->chip_types[1].chip.irq_mask = irq_gc_mask_set_bit;
+ gc->chip_types[1].chip.irq_unmask = irq_gc_mask_clr_bit;
+ }
+
+ irq_set_handler_data(irq, gc);
+ irq_set_chained_handler(irq, dw_apb_ictl_handler);
+
+ return 0;
+
+err_unmap:
+ iounmap(iobase);
+err_release:
+ release_mem_region(r.start, resource_size(&r));
+ return ret;
+}
+IRQCHIP_DECLARE(dw_apb_ictl,
+ "snps,dw-apb-ictl", dw_apb_ictl_init);
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index 1e2d83f2b995..cc29832c9638 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_RESET_CONTROLLER) += core.o
+obj-$(CONFIG_ARCH_SUNXI) += reset-sunxi.o
diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c
new file mode 100644
index 000000000000..695bd3496eba
--- /dev/null
+++ b/drivers/reset/reset-sunxi.c
@@ -0,0 +1,175 @@
+/*
+ * Allwinner SoCs Reset Controller driver
+ *
+ * Copyright 2013 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+struct sunxi_reset_data {
+ spinlock_t lock;
+ void __iomem *membase;
+ struct reset_controller_dev rcdev;
+};
+
+static int sunxi_reset_assert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct sunxi_reset_data *data = container_of(rcdev,
+ struct sunxi_reset_data,
+ rcdev);
+ int bank = id / BITS_PER_LONG;
+ int offset = id % BITS_PER_LONG;
+ unsigned long flags;
+ u32 reg;
+
+ spin_lock_irqsave(&data->lock, flags);
+
+ reg = readl(data->membase + (bank * 4));
+ writel(reg & ~BIT(offset), data->membase + (bank * 4));
+
+ spin_unlock_irqrestore(&data->lock, flags);
+
+ return 0;
+}
+
+static int sunxi_reset_deassert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct sunxi_reset_data *data = container_of(rcdev,
+ struct sunxi_reset_data,
+ rcdev);
+ int bank = id / BITS_PER_LONG;
+ int offset = id % BITS_PER_LONG;
+ unsigned long flags;
+ u32 reg;
+
+ spin_lock_irqsave(&data->lock, flags);
+
+ reg = readl(data->membase + (bank * 4));
+ writel(reg | BIT(offset), data->membase + (bank * 4));
+
+ spin_unlock_irqrestore(&data->lock, flags);
+
+ return 0;
+}
+
+static struct reset_control_ops sunxi_reset_ops = {
+ .assert = sunxi_reset_assert,
+ .deassert = sunxi_reset_deassert,
+};
+
+static int sunxi_reset_init(struct device_node *np)
+{
+ struct sunxi_reset_data *data;
+ struct resource res;
+ resource_size_t size;
+ int ret;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ ret = of_address_to_resource(np, 0, &res);
+ if (ret)
+ goto err_alloc;
+
+ size = resource_size(&res);
+ if (!request_mem_region(res.start, size, np->name)) {
+ ret = -EBUSY;
+ goto err_alloc;
+ }
+
+ data->membase = ioremap(res.start, size);
+ if (!data->membase) {
+ ret = -ENOMEM;
+ goto err_alloc;
+ }
+
+ data->rcdev.owner = THIS_MODULE;
+ data->rcdev.nr_resets = size * 32;
+ data->rcdev.ops = &sunxi_reset_ops;
+ data->rcdev.of_node = np;
+ reset_controller_register(&data->rcdev);
+
+ return 0;
+
+err_alloc:
+ kfree(data);
+ return ret;
+};
+
+/*
+ * These are the reset controller we need to initialize early on in
+ * our system, before we can even think of using a regular device
+ * driver for it.
+ */
+static const struct of_device_id sunxi_early_reset_dt_ids[] __initdata = {
+ { .compatible = "allwinner,sun6i-a31-ahb1-reset", },
+ { /* sentinel */ },
+};
+
+void __init sun6i_reset_init(void)
+{
+ struct device_node *np;
+
+ for_each_matching_node(np, sunxi_early_reset_dt_ids)
+ sunxi_reset_init(np);
+}
+
+/*
+ * And these are the controllers we can register through the regular
+ * device model.
+ */
+static const struct of_device_id sunxi_reset_dt_ids[] = {
+ { .compatible = "allwinner,sun6i-a31-clock-reset", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sunxi_reset_dt_ids);
+
+static int sunxi_reset_probe(struct platform_device *pdev)
+{
+ return sunxi_reset_init(pdev->dev.of_node);
+}
+
+static int sunxi_reset_remove(struct platform_device *pdev)
+{
+ struct sunxi_reset_data *data = platform_get_drvdata(pdev);
+
+ reset_controller_unregister(&data->rcdev);
+ iounmap(data->membase);
+ kfree(data);
+
+ return 0;
+}
+
+static struct platform_driver sunxi_reset_driver = {
+ .probe = sunxi_reset_probe,
+ .remove = sunxi_reset_remove,
+ .driver = {
+ .name = "sunxi-reset",
+ .owner = THIS_MODULE,
+ .of_match_table = sunxi_reset_dt_ids,
+ },
+};
+module_platform_driver(sunxi_reset_driver);
+
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com");
+MODULE_DESCRIPTION("Allwinner SoCs Reset Controller Driver");
+MODULE_LICENSE("GPL");