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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-04 12:31:18 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-04 12:31:18 -0700 |
commit | 6fa52ed33bea997374a88dbacbba5bf8c7ac4fef (patch) | |
tree | a0904b78d66c9b99d6acf944cf58bcaa0cffc511 /arch/arm/mach-vt8500 | |
parent | 1db772216f48978d5146b858586f6178433aad38 (diff) | |
parent | bc8fd900c4d460b4e4bf785bb48bfced0ac9941b (diff) | |
download | kernel_goldelico_gta04-6fa52ed33bea997374a88dbacbba5bf8c7ac4fef.zip kernel_goldelico_gta04-6fa52ed33bea997374a88dbacbba5bf8c7ac4fef.tar.gz kernel_goldelico_gta04-6fa52ed33bea997374a88dbacbba5bf8c7ac4fef.tar.bz2 |
Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver changes from Olof Johansson:
"This is a rather large set of patches for device drivers that for one
reason or another the subsystem maintainer preferred to get merged
through the arm-soc tree. There are both new drivers as well as
existing drivers that are getting converted from platform-specific
code into standalone drivers using the appropriate subsystem specific
interfaces.
In particular, we can now have pinctrl, clk, clksource and irqchip
drivers in one file per driver, without the need to call into platform
specific interface, or to get called from platform specific code, as
long as all information about the hardware is provided through a
device tree.
Most of the drivers we touch this time are for clocksource. Since now
most of them are part of drivers/clocksource, I expect that we won't
have to touch these again from arm-soc and can let the clocksource
maintainers take care of these in the future.
Another larger part of this series is specific to the exynos platform,
which is seeing some significant effort in upstreaming and
modernization of its device drivers this time around, which
unfortunately is also the cause for the churn and a lot of the merge
conflicts.
There is one new subsystem that gets merged as part of this series:
the reset controller interface, which is a very simple interface for
taking devices on the SoC out of reset or back into reset. Patches to
use this interface on i.MX follow later in this merge window, and we
are going to have other platforms (at least tegra and sirf) get
converted in 3.11. This will let us get rid of platform specific
callbacks in a number of platform independent device drivers."
* tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (256 commits)
irqchip: s3c24xx: add missing __init annotations
ARM: dts: Disable the RTC by default on exynos5
clk: exynos5250: Fix parent clock for sclk_mmc{0,1,2,3}
ARM: exynos: restore mach/regs-clock.h for exynos5
clocksource: exynos_mct: fix build error on non-DT
pinctrl: vt8500: wmt: Fix checking return value of pinctrl_register()
irqchip: vt8500: Convert arch-vt8500 to new irqchip infrastructure
reset: NULL deref on allocation failure
reset: Add reset controller API
dt: describe base reset signal binding
ARM: EXYNOS: Add arm-pmu DT binding for exynos421x
ARM: EXYNOS: Add arm-pmu DT binding for exynos5250
ARM: EXYNOS: Enable PMUs for exynos4
irqchip: exynos-combiner: Correct combined IRQs for exynos4
irqchip: exynos-combiner: Add set_irq_affinity function for combiner_irq
ARM: EXYNOS: fix compilation error introduced due to common clock migration
clk: exynos5250: Fix divider values for sclk_mmc{0,1,2,3}
clk: exynos4: export clocks required for fimc-is
clk: samsung: Fix compilation error
clk: tegra: fix enum tegra114_clk to match binding
...
Diffstat (limited to 'arch/arm/mach-vt8500')
-rw-r--r-- | arch/arm/mach-vt8500/Kconfig | 1 | ||||
-rw-r--r-- | arch/arm/mach-vt8500/Makefile | 2 | ||||
-rw-r--r-- | arch/arm/mach-vt8500/common.h | 6 | ||||
-rw-r--r-- | arch/arm/mach-vt8500/irq.c | 253 | ||||
-rw-r--r-- | arch/arm/mach-vt8500/vt8500.c | 14 |
5 files changed, 4 insertions, 272 deletions
diff --git a/arch/arm/mach-vt8500/Kconfig b/arch/arm/mach-vt8500/Kconfig index e3e94b2..9b25293 100644 --- a/arch/arm/mach-vt8500/Kconfig +++ b/arch/arm/mach-vt8500/Kconfig @@ -7,6 +7,7 @@ config ARCH_VT8500 select GENERIC_CLOCKEVENTS select HAVE_CLK select VT8500_TIMER + select PINCTRL help Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip. diff --git a/arch/arm/mach-vt8500/Makefile b/arch/arm/mach-vt8500/Makefile index 92ceb24..4c8a846 100644 --- a/arch/arm/mach-vt8500/Makefile +++ b/arch/arm/mach-vt8500/Makefile @@ -1 +1 @@ -obj-$(CONFIG_ARCH_VT8500) += irq.o vt8500.o +obj-$(CONFIG_ARCH_VT8500) += vt8500.o diff --git a/arch/arm/mach-vt8500/common.h b/arch/arm/mach-vt8500/common.h index 77611a6..087787a 100644 --- a/arch/arm/mach-vt8500/common.h +++ b/arch/arm/mach-vt8500/common.h @@ -18,13 +18,7 @@ #include <linux/of.h> -int __init vt8500_irq_init(struct device_node *node, - struct device_node *parent); - /* defined in drivers/clk/clk-vt8500.c */ void __init vtwm_clk_init(void __iomem *pmc_base); -/* defined in irq.c */ -asmlinkage void vt8500_handle_irq(struct pt_regs *regs); - #endif diff --git a/arch/arm/mach-vt8500/irq.c b/arch/arm/mach-vt8500/irq.c deleted file mode 100644 index b9cf5ce..0000000 --- a/arch/arm/mach-vt8500/irq.c +++ /dev/null @@ -1,253 +0,0 @@ -/* - * arch/arm/mach-vt8500/irq.c - * - * Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz> - * Copyright (C) 2010 Alexey Charkov <alchark@gmail.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. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -/* - * This file is copied and modified from the original irq.c provided by - * Alexey Charkov. Minor changes have been made for Device Tree Support. - */ - -#include <linux/slab.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/irqdomain.h> -#include <linux/interrupt.h> -#include <linux/bitops.h> - -#include <linux/of.h> -#include <linux/of_irq.h> -#include <linux/of_address.h> - -#include <asm/irq.h> -#include <asm/exception.h> - -#define VT8500_ICPC_IRQ 0x20 -#define VT8500_ICPC_FIQ 0x24 -#define VT8500_ICDC 0x40 /* Destination Control 64*u32 */ -#define VT8500_ICIS 0x80 /* Interrupt status, 16*u32 */ - -/* ICPC */ -#define ICPC_MASK 0x3F -#define ICPC_ROTATE BIT(6) - -/* IC_DCTR */ -#define ICDC_IRQ 0x00 -#define ICDC_FIQ 0x01 -#define ICDC_DSS0 0x02 -#define ICDC_DSS1 0x03 -#define ICDC_DSS2 0x04 -#define ICDC_DSS3 0x05 -#define ICDC_DSS4 0x06 -#define ICDC_DSS5 0x07 - -#define VT8500_INT_DISABLE 0 -#define VT8500_INT_ENABLE BIT(3) - -#define VT8500_TRIGGER_HIGH 0 -#define VT8500_TRIGGER_RISING BIT(5) -#define VT8500_TRIGGER_FALLING BIT(6) -#define VT8500_EDGE ( VT8500_TRIGGER_RISING \ - | VT8500_TRIGGER_FALLING) - -/* vt8500 has 1 intc, wm8505 and wm8650 have 2 */ -#define VT8500_INTC_MAX 2 - -struct vt8500_irq_data { - void __iomem *base; /* IO Memory base address */ - struct irq_domain *domain; /* Domain for this controller */ -}; - -/* Global variable for accessing io-mem addresses */ -static struct vt8500_irq_data intc[VT8500_INTC_MAX]; -static u32 active_cnt = 0; - -static void vt8500_irq_mask(struct irq_data *d) -{ - struct vt8500_irq_data *priv = d->domain->host_data; - void __iomem *base = priv->base; - void __iomem *stat_reg = base + VT8500_ICIS + (d->hwirq < 32 ? 0 : 4); - u8 edge, dctr; - u32 status; - - edge = readb(base + VT8500_ICDC + d->hwirq) & VT8500_EDGE; - if (edge) { - status = readl(stat_reg); - - status |= (1 << (d->hwirq & 0x1f)); - writel(status, stat_reg); - } else { - dctr = readb(base + VT8500_ICDC + d->hwirq); - dctr &= ~VT8500_INT_ENABLE; - writeb(dctr, base + VT8500_ICDC + d->hwirq); - } -} - -static void vt8500_irq_unmask(struct irq_data *d) -{ - struct vt8500_irq_data *priv = d->domain->host_data; - void __iomem *base = priv->base; - u8 dctr; - - dctr = readb(base + VT8500_ICDC + d->hwirq); - dctr |= VT8500_INT_ENABLE; - writeb(dctr, base + VT8500_ICDC + d->hwirq); -} - -static int vt8500_irq_set_type(struct irq_data *d, unsigned int flow_type) -{ - struct vt8500_irq_data *priv = d->domain->host_data; - void __iomem *base = priv->base; - u8 dctr; - - dctr = readb(base + VT8500_ICDC + d->hwirq); - dctr &= ~VT8500_EDGE; - - switch (flow_type) { - case IRQF_TRIGGER_LOW: - return -EINVAL; - case IRQF_TRIGGER_HIGH: - dctr |= VT8500_TRIGGER_HIGH; - __irq_set_handler_locked(d->irq, handle_level_irq); - break; - case IRQF_TRIGGER_FALLING: - dctr |= VT8500_TRIGGER_FALLING; - __irq_set_handler_locked(d->irq, handle_edge_irq); - break; - case IRQF_TRIGGER_RISING: - dctr |= VT8500_TRIGGER_RISING; - __irq_set_handler_locked(d->irq, handle_edge_irq); - break; - } - writeb(dctr, base + VT8500_ICDC + d->hwirq); - - return 0; -} - -static struct irq_chip vt8500_irq_chip = { - .name = "vt8500", - .irq_ack = vt8500_irq_mask, - .irq_mask = vt8500_irq_mask, - .irq_unmask = vt8500_irq_unmask, - .irq_set_type = vt8500_irq_set_type, -}; - -static void __init vt8500_init_irq_hw(void __iomem *base) -{ - u32 i; - - /* Enable rotating priority for IRQ */ - writel(ICPC_ROTATE, base + VT8500_ICPC_IRQ); - writel(0x00, base + VT8500_ICPC_FIQ); - - /* Disable all interrupts and route them to IRQ */ - for (i = 0; i < 64; i++) - writeb(VT8500_INT_DISABLE | ICDC_IRQ, base + VT8500_ICDC + i); -} - -static int vt8500_irq_map(struct irq_domain *h, unsigned int virq, - irq_hw_number_t hw) -{ - irq_set_chip_and_handler(virq, &vt8500_irq_chip, handle_level_irq); - set_irq_flags(virq, IRQF_VALID); - - return 0; -} - -static struct irq_domain_ops vt8500_irq_domain_ops = { - .map = vt8500_irq_map, - .xlate = irq_domain_xlate_onecell, -}; - -asmlinkage void __exception_irq_entry vt8500_handle_irq(struct pt_regs *regs) -{ - u32 stat, i; - int irqnr, virq; - void __iomem *base; - - /* Loop through each active controller */ - for (i=0; i<active_cnt; i++) { - base = intc[i].base; - irqnr = readl_relaxed(base) & 0x3F; - /* - Highest Priority register default = 63, so check that this - is a real interrupt by checking the status register - */ - if (irqnr == 63) { - stat = readl_relaxed(base + VT8500_ICIS + 4); - if (!(stat & BIT(31))) - continue; - } - - virq = irq_find_mapping(intc[i].domain, irqnr); - handle_IRQ(virq, regs); - } -} - -int __init vt8500_irq_init(struct device_node *node, struct device_node *parent) -{ - int irq, i; - struct device_node *np = node; - - if (active_cnt == VT8500_INTC_MAX) { - pr_err("%s: Interrupt controllers > VT8500_INTC_MAX\n", - __func__); - goto out; - } - - intc[active_cnt].base = of_iomap(np, 0); - intc[active_cnt].domain = irq_domain_add_linear(node, 64, - &vt8500_irq_domain_ops, &intc[active_cnt]); - - if (!intc[active_cnt].base) { - pr_err("%s: Unable to map IO memory\n", __func__); - goto out; - } - - if (!intc[active_cnt].domain) { - pr_err("%s: Unable to add irq domain!\n", __func__); - goto out; - } - - vt8500_init_irq_hw(intc[active_cnt].base); - - pr_info("vt8500-irq: Added interrupt controller\n"); - - active_cnt++; - - /* check if this is a slaved controller */ - if (of_irq_count(np) != 0) { - /* check that we have the correct number of interrupts */ - if (of_irq_count(np) != 8) { - pr_err("%s: Incorrect IRQ map for slaved controller\n", - __func__); - return -EINVAL; - } - - for (i = 0; i < 8; i++) { - irq = irq_of_parse_and_map(np, i); - enable_irq(irq); - } - - pr_info("vt8500-irq: Enabled slave->parent interrupts\n"); - } -out: - return 0; -} - diff --git a/arch/arm/mach-vt8500/vt8500.c b/arch/arm/mach-vt8500/vt8500.c index 49e8005..1dd281e 100644 --- a/arch/arm/mach-vt8500/vt8500.c +++ b/arch/arm/mach-vt8500/vt8500.c @@ -20,6 +20,7 @@ #include <linux/clocksource.h> #include <linux/io.h> +#include <linux/irqchip.h> #include <linux/pm.h> #include <asm/mach-types.h> @@ -166,16 +167,6 @@ void __init vt8500_init(void) of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); } -static const struct of_device_id vt8500_irq_match[] __initconst = { - { .compatible = "via,vt8500-intc", .data = vt8500_irq_init, }, - { /* sentinel */ }, -}; - -static void __init vt8500_init_irq(void) -{ - of_irq_init(vt8500_irq_match); -}; - static const char * const vt8500_dt_compat[] = { "via,vt8500", "wm,wm8650", @@ -187,10 +178,9 @@ static const char * const vt8500_dt_compat[] = { DT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)") .dt_compat = vt8500_dt_compat, .map_io = vt8500_map_io, - .init_irq = vt8500_init_irq, + .init_irq = irqchip_init, .init_machine = vt8500_init, .init_time = clocksource_of_init, .restart = vt8500_restart, - .handle_irq = vt8500_handle_irq, MACHINE_END |