From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greentime Hu Subject: [PATCH v7 0/3] clocksource/drivers/atcpit100: Add andestech atcpit100 timer Date: Tue, 13 Feb 2018 17:13:16 +0800 Message-ID: Return-path: Sender: linux-kernel-owner@vger.kernel.org To: greentime@andestech.com, linux-kernel@vger.kernel.org, arnd@arndb.de, linux-arch@vger.kernel.org, tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com, robh+dt@kernel.org, netdev@vger.kernel.org, deanbo422@gmail.com, devicetree@vger.kernel.org, viro@zeniv.linux.org.uk, dhowells@redhat.com, will.deacon@arm.com, daniel.lezcano@linaro.org, linux-serial@vger.kernel.org, geert.uytterhoeven@gmail.com, linus.walleij@linaro.org, mark.rutland@arm.com, greg@kroah.com, ren_guo@c-sky.com, rdunlap@infradead.org, davem@davemloft.net, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com Cc: green.hu@gmail.com List-Id: devicetree@vger.kernel.org Hi, all: ATCPIT100 is often used on the Andes architecture, This timer provide 4 PIT channels. Each PIT channel is a multi-function timer, can be configured as 32,16,8 bit timers or PWM as well. For system timer it will set channel 1 32-bit timer0 as clock source and count downwards until underflow and restart again. It also set channel 0 32-bit timer0 as clock event and count downwards until condition match. It will generate an interrupt for handling periodically. Changes in v7: - Fix atcpit100_clkevt_next_event(), before set reload register, clock source timer shall disable. And re-enable it after the setting. Without this modification, the test case 'clock_nanosleep02' of ltp_20170929 will fail. Changes in v6: - To select TIMER_OF in drivers/clocksource/Kconfig instead of arch/nds32/Kconfig - Refine Kconfig - Update license format to SPDX-License-Identifier Rick Chen (3): clocksource/drivers/atcpit100: Add andestech atcpit100 timer clocksource/drivers/atcpit100: VDSO support dt-bindings: timer: Add andestech atcpit100 timer binding doc .../bindings/timer/andestech,atcpit100-timer.txt | 33 +++ drivers/clocksource/Kconfig | 9 + drivers/clocksource/Makefile | 1 + drivers/clocksource/timer-atcpit100.c | 266 +++++++++++++++++++++ 4 files changed, 309 insertions(+) create mode 100644 Documentation/devicetree/bindings/timer/andestech,atcpit100-timer.txt create mode 100644 drivers/clocksource/timer-atcpit100.c -- 2.16.1