On 06/29/2016 05:25 PM, Arnd Bergmann wrote:

On Saturday, June 25, 2016 6:37:19 PM CEST Wan Zongshun wrote:

quoted

This patch is to add nuc970 clocksource driver support.

Signed-off-by: Wan Zongshun <redacted>
---
  .../mach-w90x900/include/mach/nuc970-regs-timer.h  |  44 +++++
  drivers/clocksource/Kconfig                        |   8 +
  drivers/clocksource/Makefile                       |   1 +
  drivers/clocksource/timer-nuc900.c                 | 207 +++++++++++++++++++++
  4 files changed, 260 insertions(+)
  create mode 100644 arch/arm/mach-w90x900/include/mach/nuc970-regs-timer.h
  create mode 100644 drivers/clocksource/timer-nuc900.c

diff --git a/arch/arm/mach-w90x900/include/mach/nuc970-regs-timer.h b/arch/arm/mach-w90x900/include/mach/nuc970-regs-timer.h
new file mode 100644
index 0000000..43d7e8b
--- /dev/null
+++ b/arch/arm/mach-w90x900/include/mach/nuc970-regs-timer.h

Please move the contents of the header file into the driver. We try to not
have any new mach/*.h headers.

quoted

+
+static unsigned int timer0_load;
+static void __iomem *tmr_base;
+
+static int nuc970_clockevent_set_oneshot(struct clock_event_device *evt)
+{
+	unsigned int val;
+
+	val = __raw_readl(tmr_base + REG_TMR_TCSR0);
+	val &= ~(0x03 << 27);
+
+	val |= (ONESHOT | COUNTEN | INTEN | PRESCALE);
+
+	__raw_writel(val, tmr_base + REG_TMR_TCSR0);
+	return 0;
+}
+

writel() instead of __raw_writel()

Wan Zongshun,

FYI : https://lkml.org/lkml/2015/12/18/422

Not sure it does a noticeable difference on arm926.

Thanks Arnd for the clarification.

   -- Daniel


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