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Message-ID: <1568123236-767-8-git-send-email-claudiu.beznea@microchip.com>
Date: Tue, 10 Sep 2019 16:47:16 +0300
From: Claudiu Beznea <claudiu.beznea@...rochip.com>
To: <daniel.lezcano@...aro.org>, <robh+dt@...nel.org>,
<mark.rutland@....com>, <linux@...linux.org.uk>, <nsekhar@...com>,
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CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mips@...r.kernel.org>, <nios2-dev@...ts.rocketboards.org>,
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"Claudiu Beznea" <claudiu.beznea@...rochip.com>
Subject: [PATCH 7/7] clocksource/drivers/integrator-ap: parse the chosen node
From: Alexandre Belloni <alexandre.belloni@...tlin.com>
The driver currently uses aliases to know whether the timer is the
clocksource or the clockevent. Add the /chosen/linux,clocksource and
/chosen/linux,clockevent parsing while keeping backward compatibility.
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
drivers/clocksource/Kconfig | 1 +
drivers/clocksource/timer-integrator-ap.c | 21 ++++++++++++++++++++-
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index a642c23b2fba..e1742c0abb03 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -240,6 +240,7 @@ config KEYSTONE_TIMER
config INTEGRATOR_AP_TIMER
bool "Integrator-ap timer driver" if COMPILE_TEST
select CLKSRC_MMIO
+ select TIMER_OF
help
Enables support for the Integrator-ap timer.
diff --git a/drivers/clocksource/timer-integrator-ap.c b/drivers/clocksource/timer-integrator-ap.c
index 8d6f814ace36..78af89e73125 100644
--- a/drivers/clocksource/timer-integrator-ap.c
+++ b/drivers/clocksource/timer-integrator-ap.c
@@ -14,6 +14,7 @@
#include <linux/interrupt.h>
#include <linux/sched_clock.h>
+#include "timer-of.h"
#include "timer-sp.h"
static void __iomem * sched_clk_base;
@@ -160,6 +161,12 @@ static int integrator_clockevent_init(unsigned long inrate,
return 0;
}
+static struct timer_of to[] = {
+ { .flags = TIMER_OF_TYPE_CS, },
+ { .flags = TIMER_OF_TYPE_CE, },
+ { /* sentinel */ }
+};
+
static int __init integrator_ap_timer_init_of(struct device_node *node)
{
const char *path;
@@ -169,6 +176,7 @@ static int __init integrator_ap_timer_init_of(struct device_node *node)
struct clk *clk;
unsigned long rate;
struct device_node *alias_node;
+ struct timer_of *to = node->data;
base = of_io_request_and_map(node, 0, "integrator-timer");
if (IS_ERR(base))
@@ -183,6 +191,17 @@ static int __init integrator_ap_timer_init_of(struct device_node *node)
rate = clk_get_rate(clk);
writel(0, base + TIMER_CTRL);
+ if (timer_of_is_clocksource(to))
+ /* The primary timer lacks IRQ, use as clocksource */
+ return integrator_clocksource_init(rate, base);
+
+ if (timer_of_is_clockevent(to)) {
+ /* The secondary timer will drive the clock event */
+ irq = irq_of_parse_and_map(node, 0);
+ return integrator_clockevent_init(rate, base, irq);
+ }
+
+ /* DT ABI compatibility below */
err = of_property_read_string(of_aliases,
"arm,timer-primary", &path);
if (err) {
@@ -227,4 +246,4 @@ static int __init integrator_ap_timer_init_of(struct device_node *node)
}
TIMER_OF_DECLARE(integrator_ap_timer, "arm,integrator-timer",
- integrator_ap_timer_init_of, NULL);
+ integrator_ap_timer_init_of, to);
--
2.7.4
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