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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2014-04-23 01:26:27 +0400
committerJason Cooper <jason@lakedaemon.net>2014-04-26 23:45:07 +0400
commitab5ab9dbe6bd480d17f23b3a33510ae33e6ab280 (patch)
tree875a6ac95218ff54015970f7222b5da81f8f06cc /arch/arm/mach-orion5x
parentdeac3d874ea1e1ef50604cec33ddfb01edb0c976 (diff)
downloadlinux-ab5ab9dbe6bd480d17f23b3a33510ae33e6ab280.tar.xz
ARM: orion5x: switch to DT interrupts and timer
This commit switches the Orion5x platforms described through DT to use a DT-defined interrupt controller and timer. This involves: * Describing in the DT the bridge interrupt controller, which is a child interrupt controller to the main one, which is used for timer and watchdog interrupts. * Describing in the DT the timer. * Adding in the DT the interrupt specifications for the watchdog. * Selecting the ORION_IRQCHIP and ORION_TIMER drivers to be compiled. * Change board-dt.c to no longer have an ->init_time() callback, since the default callback will work fine: it calls clocksource_of_init() and of_clk_init(), as needed. * Implement a multi-IRQ handler for non-DT platforms in mach-orion5x/irq.c. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Link: https://lkml.kernel.org/r/1398202002-28530-24-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'arch/arm/mach-orion5x')
-rw-r--r--arch/arm/mach-orion5x/Kconfig2
-rw-r--r--arch/arm/mach-orion5x/board-dt.c15
-rw-r--r--arch/arm/mach-orion5x/irq.c28
3 files changed, 31 insertions, 14 deletions
diff --git a/arch/arm/mach-orion5x/Kconfig b/arch/arm/mach-orion5x/Kconfig
index 4f5113279352..bd65872f5e04 100644
--- a/arch/arm/mach-orion5x/Kconfig
+++ b/arch/arm/mach-orion5x/Kconfig
@@ -6,6 +6,8 @@ config ARCH_ORION5X_DT
bool "Marvell Orion5x Flattened Device Tree"
select USE_OF
select ORION_CLK
+ select ORION_IRQCHIP
+ select ORION_TIMER
help
Say 'Y' here if you want your kernel to support the
Marvell Orion5x using flattened device tree.
diff --git a/arch/arm/mach-orion5x/board-dt.c b/arch/arm/mach-orion5x/board-dt.c
index 34286ef16320..6dc4846519ec 100644
--- a/arch/arm/mach-orion5x/board-dt.c
+++ b/arch/arm/mach-orion5x/board-dt.c
@@ -17,6 +17,7 @@
#include <linux/cpu.h>
#include <linux/mbus.h>
#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
#include <asm/system_misc.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
@@ -36,17 +37,6 @@ static struct of_dev_auxdata orion5x_auxdata_lookup[] __initdata = {
{},
};
-static void orion5x_dt_init_early(void)
-{
- orion_time_set_base(TIMER_VIRT_BASE);
-}
-
-static void orion5x_dt_init_time(void)
-{
- orion5x_timer_init();
- of_clk_init(NULL);
-}
-
static void __init orion5x_dt_init(void)
{
char *dev_name;
@@ -86,9 +76,6 @@ static const char *orion5x_dt_compat[] = {
DT_MACHINE_START(ORION5X_DT, "Marvell Orion5x (Flattened Device Tree)")
/* Maintainer: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> */
.map_io = orion5x_map_io,
- .init_early = orion5x_dt_init_early,
- .init_irq = orion_dt_init_irq,
- .init_time = orion5x_dt_init_time,
.init_machine = orion5x_dt_init,
.restart = orion5x_restart,
.dt_compat = orion5x_dt_compat,
diff --git a/arch/arm/mach-orion5x/irq.c b/arch/arm/mach-orion5x/irq.c
index 9654b0cc5892..cd4bac4d7e43 100644
--- a/arch/arm/mach-orion5x/irq.c
+++ b/arch/arm/mach-orion5x/irq.c
@@ -16,6 +16,7 @@
#include <mach/bridge-regs.h>
#include <plat/orion-gpio.h>
#include <plat/irq.h>
+#include <asm/exception.h>
#include "common.h"
static int __initdata gpio0_irqs[4] = {
@@ -25,10 +26,37 @@ static int __initdata gpio0_irqs[4] = {
IRQ_ORION5X_GPIO_24_31,
};
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+/*
+ * Compiling with both non-DT and DT support enabled, will
+ * break asm irq handler used by non-DT boards. Therefore,
+ * we provide a C-style irq handler even for non-DT boards,
+ * if MULTI_IRQ_HANDLER is set.
+ */
+
+asmlinkage void
+__exception_irq_entry orion5x_legacy_handle_irq(struct pt_regs *regs)
+{
+ u32 stat;
+
+ stat = readl_relaxed(MAIN_IRQ_CAUSE);
+ stat &= readl_relaxed(MAIN_IRQ_MASK);
+ if (stat) {
+ unsigned int hwirq = __fls(stat);
+ handle_IRQ(hwirq, regs);
+ return;
+ }
+}
+#endif
+
void __init orion5x_init_irq(void)
{
orion_irq_init(0, MAIN_IRQ_MASK);
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+ set_handle_irq(orion5x_legacy_handle_irq);
+#endif
+
/*
* Initialize gpiolib for GPIOs 0-31.
*/