mirror of
https://github.com/Ysurac/openmptcprouter.git
synced 2025-03-09 15:40:20 +00:00
119 lines
3.9 KiB
Diff
119 lines
3.9 KiB
Diff
From b02c8d4b8e4ef2bdb9b5610c4291beee3bcb4932 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Tue, 23 Jan 2018 16:52:45 +0000
|
|
Subject: [PATCH 032/432] irqchip: irq-bcm2836: Remove regmap and syscon use
|
|
|
|
The syscon node defines a register range that duplicates that used by
|
|
the local_intc node on bcm2836/7. Since irq-bcm2835 and irq-bcm2836 are
|
|
built in and always present together (both drivers are enabled by
|
|
CONFIG_ARCH_BCM2835), it is possible to replace the syscon usage with a
|
|
global variable that simplifies the code. Doing so does lose the
|
|
locking provided by regmap, but as only one side is using the regmap
|
|
interface (irq-bcm2835 uses readl and write) there is no loss of
|
|
atomicity.
|
|
|
|
See: https://github.com/raspberrypi/firmware/issues/926
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
|
|
---
|
|
drivers/irqchip/irq-bcm2835.c | 32 ++++++++++++--------------------
|
|
drivers/irqchip/irq-bcm2836.c | 5 +++++
|
|
2 files changed, 17 insertions(+), 20 deletions(-)
|
|
|
|
diff --git a/drivers/irqchip/irq-bcm2835.c b/drivers/irqchip/irq-bcm2835.c
|
|
index 13356d3b7bcd..7bdfc18dd976 100644
|
|
--- a/drivers/irqchip/irq-bcm2835.c
|
|
+++ b/drivers/irqchip/irq-bcm2835.c
|
|
@@ -50,8 +50,6 @@
|
|
#include <linux/of_irq.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/irqdomain.h>
|
|
-#include <linux/mfd/syscon.h>
|
|
-#include <linux/regmap.h>
|
|
|
|
#include <asm/exception.h>
|
|
#include <asm/mach/irq.h>
|
|
@@ -100,7 +98,7 @@ struct armctrl_ic {
|
|
void __iomem *enable[NR_BANKS];
|
|
void __iomem *disable[NR_BANKS];
|
|
struct irq_domain *domain;
|
|
- struct regmap *local_regmap;
|
|
+ void __iomem *local_base;
|
|
};
|
|
|
|
static struct armctrl_ic intc __read_mostly;
|
|
@@ -137,24 +135,20 @@ static void armctrl_unmask_irq(struct irq_data *d)
|
|
if (d->hwirq >= NUMBER_IRQS) {
|
|
if (num_online_cpus() > 1) {
|
|
unsigned int data;
|
|
- int ret;
|
|
|
|
- if (!intc.local_regmap) {
|
|
- pr_err("FIQ is disabled due to missing regmap\n");
|
|
+ if (!intc.local_base) {
|
|
+ pr_err("FIQ is disabled due to missing arm_local_intc\n");
|
|
return;
|
|
}
|
|
|
|
- ret = regmap_read(intc.local_regmap,
|
|
- ARM_LOCAL_GPU_INT_ROUTING, &data);
|
|
- if (ret) {
|
|
- pr_err("Failed to read int routing %d\n", ret);
|
|
- return;
|
|
- }
|
|
+ data = readl_relaxed(intc.local_base +
|
|
+ ARM_LOCAL_GPU_INT_ROUTING);
|
|
|
|
data &= ~0xc;
|
|
data |= (1 << 2);
|
|
- regmap_write(intc.local_regmap,
|
|
- ARM_LOCAL_GPU_INT_ROUTING, data);
|
|
+ writel_relaxed(data,
|
|
+ intc.local_base +
|
|
+ ARM_LOCAL_GPU_INT_ROUTING);
|
|
}
|
|
|
|
writel_relaxed(REG_FIQ_ENABLE | hwirq_to_fiq(d->hwirq),
|
|
@@ -240,12 +234,10 @@ static int __init armctrl_of_init(struct device_node *node,
|
|
}
|
|
|
|
if (is_2836) {
|
|
- intc.local_regmap =
|
|
- syscon_regmap_lookup_by_compatible("brcm,bcm2836-arm-local");
|
|
- if (IS_ERR(intc.local_regmap)) {
|
|
- pr_err("Failed to get local register map. FIQ is disabled for cpus > 1\n");
|
|
- intc.local_regmap = NULL;
|
|
- }
|
|
+ extern void __iomem * __attribute__((weak)) arm_local_intc;
|
|
+ intc.local_base = arm_local_intc;
|
|
+ if (!intc.local_base)
|
|
+ pr_err("Failed to get local intc base. FIQ is disabled for cpus > 1\n");
|
|
}
|
|
|
|
/* Make a duplicate irq range which is used to enable FIQ */
|
|
diff --git a/drivers/irqchip/irq-bcm2836.c b/drivers/irqchip/irq-bcm2836.c
|
|
index 9d0f221a1daa..39d05403835f 100644
|
|
--- a/drivers/irqchip/irq-bcm2836.c
|
|
+++ b/drivers/irqchip/irq-bcm2836.c
|
|
@@ -30,6 +30,9 @@ struct bcm2836_arm_irqchip_intc {
|
|
|
|
static struct bcm2836_arm_irqchip_intc intc __read_mostly;
|
|
|
|
+void __iomem *arm_local_intc;
|
|
+EXPORT_SYMBOL_GPL(arm_local_intc);
|
|
+
|
|
static void bcm2836_arm_irqchip_mask_per_cpu_irq(unsigned int reg_offset,
|
|
unsigned int bit,
|
|
int cpu)
|
|
@@ -234,6 +237,8 @@ static int __init bcm2836_arm_irqchip_l1_intc_of_init(struct device_node *node,
|
|
panic("%pOF: unable to map local interrupt registers\n", node);
|
|
}
|
|
|
|
+ arm_local_intc = intc.base;
|
|
+
|
|
bcm2835_init_local_timer_frequency();
|
|
|
|
intc.domain = irq_domain_add_linear(node, LAST_IRQ + 1,
|
|
--
|
|
2.19.1
|
|
|