CLOCKSOURCE: Add Pistachio clocksource-only driver

The Pistachio SoC provides four general purpose timers, and allow
to implement a clocksource driver.

This driver can be used as a replacement for the MIPS GIC and MIPS R4K
clocksources and sched clocks, which are clocked from the CPU clock.

Given the general purpose timers are clocked from an independent clock,
this new clocksource driver will be useful to introduce CPUFreq support
for Pistachio machines.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Signed-off-by: Govindraj Raja <govindraj.raja@imgtec.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: James Hartley <James.Hartley@imgtec.com>
Cc: Damien Horsley <Damien.Horsley@imgtec.com>
Cc: James Hogan <James.Hogan@imgtec.com>
Cc: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/10899/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 4e57730e0be4e919203e21e070fb43666bb7b61d..74e002e80fd3c91919ec60f0cb37882befad5005 100644 (file)
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -111,6 +111,10 @@ config CLKSRC_LPC32XX
        select CLKSRC_MMIO
        select CLKSRC_OF
 
+config CLKSRC_PISTACHIO
+       bool
+       select CLKSRC_OF
+
 config CLKSRC_STM32
        bool "Clocksource for STM32 SoCs" if !ARCH_STM32
        depends on OF && ARM && (ARCH_STM32 || COMPILE_TEST)

diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index f228354961ca6f853a193f39b0a5fa2a63e47cd4..066337e247379dad08f05353f08645fa00bc93e1 100644 (file)
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -44,6 +44,7 @@ obj-$(CONFIG_FSL_FTM_TIMER)   += fsl_ftm_timer.o
 obj-$(CONFIG_VF_PIT_TIMER)     += vf_pit_timer.o
 obj-$(CONFIG_CLKSRC_QCOM)      += qcom-timer.o
 obj-$(CONFIG_MTK_TIMER)                += mtk_timer.o
+obj-$(CONFIG_CLKSRC_PISTACHIO) += time-pistachio.o
 
 obj-$(CONFIG_ARM_ARCH_TIMER)           += arm_arch_timer.o
 obj-$(CONFIG_ARM_GLOBAL_TIMER)         += arm_global_timer.o

diff --cc drivers/clocksource/time-pistachio.c
Simple merge