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authorZhen Lei <thunder.leizhen@huawei.com>2020-09-18 16:22:35 +0300
committerDaniel Lezcano <daniel.lezcano@linaro.org>2020-09-24 11:51:04 +0300
commitbd5a1936ffa2b69032815775fa54fc1c422d49d5 (patch)
tree55db2b06065ca6c0cb783282dd71d390899f3559 /drivers/clocksource
parent23c788cd48db9e2646fb5455f004e4a5626e4230 (diff)
downloadlinux-bd5a1936ffa2b69032815775fa54fc1c422d49d5.tar.xz
clocksource/drivers/sp804: Add support for Hisilicon sp804 timer
The ARM SP804 supports a maximum of 32-bit counter, but Hisilicon extends it to 64-bit. That means, the registers: TimerXload, TimerXValue and TimerXBGLoad are 64bits, all other registers are the same as those in the SP804. The driver code can be completely reused except that the register offset is different. Use compatible = "hisilicon,sp804" mark as Hisilicon sp804 timer. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200918132237.3552-8-thunder.leizhen@huawei.com
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/timer-sp804.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/clocksource/timer-sp804.c b/drivers/clocksource/timer-sp804.c
index 5f4f979a8ef2..f0783d19522f 100644
--- a/drivers/clocksource/timer-sp804.c
+++ b/drivers/clocksource/timer-sp804.c
@@ -20,6 +20,18 @@
#include "timer-sp.h"
+/* Hisilicon 64-bit timer(a variant of ARM SP804) */
+#define HISI_TIMER_1_BASE 0x00
+#define HISI_TIMER_2_BASE 0x40
+#define HISI_TIMER_LOAD 0x00
+#define HISI_TIMER_VALUE 0x08
+#define HISI_TIMER_CTRL 0x10
+#define HISI_TIMER_INTCLR 0x14
+#define HISI_TIMER_RIS 0x18
+#define HISI_TIMER_MIS 0x1c
+#define HISI_TIMER_BGLOAD 0x20
+
+
struct sp804_timer __initdata arm_sp804_timer = {
.load = TIMER_LOAD,
.value = TIMER_VALUE,
@@ -29,6 +41,15 @@ struct sp804_timer __initdata arm_sp804_timer = {
.width = 32,
};
+struct sp804_timer __initdata hisi_sp804_timer = {
+ .load = HISI_TIMER_LOAD,
+ .value = HISI_TIMER_VALUE,
+ .ctrl = HISI_TIMER_CTRL,
+ .intclr = HISI_TIMER_INTCLR,
+ .timer_base = {HISI_TIMER_1_BASE, HISI_TIMER_2_BASE},
+ .width = 64,
+};
+
static struct sp804_clkevt sp804_clkevt[NR_TIMERS];
static long __init sp804_get_clock_rate(struct clk *clk, const char *name)
@@ -315,6 +336,12 @@ static int __init arm_sp804_of_init(struct device_node *np)
}
TIMER_OF_DECLARE(sp804, "arm,sp804", arm_sp804_of_init);
+static int __init hisi_sp804_of_init(struct device_node *np)
+{
+ return sp804_of_init(np, &hisi_sp804_timer);
+}
+TIMER_OF_DECLARE(hisi_sp804, "hisilicon,sp804", hisi_sp804_of_init);
+
static int __init integrator_cp_of_init(struct device_node *np)
{
static int init_count = 0;