diff options
| author | Andrew Bresticker <abrestic@chromium.org> | 2014-10-20 12:03:49 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-11-24 07:44:57 +0100 |
| commit | 387904ff84caeeff5aa5aad43aef4d0e5ce4bb24 (patch) | |
| tree | 781cc604660fd8f0ac99e8e5fda26aee13691385 /drivers/irqchip/irq-mips-gic.c | |
| parent | 7d9ad5d8c3639113765a3a0ad78c18a736d9f494 (diff) | |
| download | linux-387904ff84caeeff5aa5aad43aef4d0e5ce4bb24.tar.bz2 | |
irqchip: mips-gic: Export function to read counter width
Export the function gic_get_count_width to read the width of
the GIC global counter from GIC_SH_CONFIG. Update the GIC
clocksource driver to use this new function.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8124/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'drivers/irqchip/irq-mips-gic.c')
| -rw-r--r-- | drivers/irqchip/irq-mips-gic.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c index e49a39a8c853..b5fad6377736 100644 --- a/drivers/irqchip/irq-mips-gic.c +++ b/drivers/irqchip/irq-mips-gic.c @@ -63,6 +63,17 @@ cycle_t gic_read_count(void) return (((cycle_t) hi) << 32) + lo; } +unsigned int gic_get_count_width(void) +{ + unsigned int bits, config; + + GICREAD(GIC_REG(SHARED, GIC_SH_CONFIG), config); + bits = 32 + 4 * ((config & GIC_SH_CONFIG_COUNTBITS_MSK) >> + GIC_SH_CONFIG_COUNTBITS_SHF); + + return bits; +} + void gic_write_compare(cycle_t cnt) { GICWRITE(GIC_REG(VPE_LOCAL, GIC_VPE_COMPARE_HI), |