From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.rapiddevelopmentkit.de ([217.6.246.34] helo=root.phytec.de) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bcXer-0005Ec-HN for barebox@lists.infradead.org; Wed, 24 Aug 2016 12:51:56 +0000 Received: from idefix.phytec.de (idefix.phytec.de [172.16.0.10]) by root.phytec.de (Postfix) with ESMTP id 48E64A00259 for ; Wed, 24 Aug 2016 14:51:37 +0200 (CEST) From: Wadim Egorov Date: Wed, 24 Aug 2016 14:49:24 +0200 Message-Id: <1472042970-35151-2-git-send-email-w.egorov@phytec.de> In-Reply-To: <1472042970-35151-1-git-send-email-w.egorov@phytec.de> References: <1472042970-35151-1-git-send-email-w.egorov@phytec.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 2/8] clocksource: Add rk3288 timer driver To: barebox@lists.infradead.org This driver comes from the u-boot (v2016.01). Signed-off-by: Wadim Egorov --- Changes since v1: - moved rk_timer to drivers/clocksource - rk_timer now binds against a DT node --- arch/arm/mach-rockchip/Kconfig | 5 ++ arch/arm/mach-rockchip/include/mach/timer.h | 19 ++++++++ drivers/clocksource/Kconfig | 4 ++ drivers/clocksource/Makefile | 1 + drivers/clocksource/rk_timer.c | 73 +++++++++++++++++++++++++++++ 5 files changed, 102 insertions(+) create mode 100644 arch/arm/mach-rockchip/include/mach/timer.h create mode 100644 drivers/clocksource/rk_timer.c diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig index e027fae..71fcbe7 100644 --- a/arch/arm/mach-rockchip/Kconfig +++ b/arch/arm/mach-rockchip/Kconfig @@ -7,6 +7,10 @@ config ARCH_TEXT_BASE default 0x68000000 if ARCH_RK3188 default 0x0 if ARCH_RK3288 +config RK_TIMER + hex + default 1 + choice prompt "Select Rockchip SoC" @@ -15,6 +19,7 @@ config ARCH_RK3188 config ARCH_RK3288 bool "Rockchip RK3288 SoCs" + select CLOCKSOURCE_ROCKCHIP endchoice comment "select Rockchip boards:" diff --git a/arch/arm/mach-rockchip/include/mach/timer.h b/arch/arm/mach-rockchip/include/mach/timer.h new file mode 100644 index 0000000..e6ed0e4 --- /dev/null +++ b/arch/arm/mach-rockchip/include/mach/timer.h @@ -0,0 +1,19 @@ +/* + * (C) Copyright 2015 Rockchip Electronics Co., Ltd + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _ASM_ARCH_TIMER_H +#define _ASM_ARCH_TIMER_H + +struct rk_timer { + unsigned int timer_load_count0; + unsigned int timer_load_count1; + unsigned int timer_curr_value0; + unsigned int timer_curr_value1; + unsigned int timer_ctrl_reg; + unsigned int timer_int_status; +}; + +#endif diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 3fb09fb..f1ab554 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -49,3 +49,7 @@ config CLOCKSOURCE_ORION config CLOCKSOURCE_UEMD bool depends on ARCH_UEMD + +config CLOCKSOURCE_ROCKCHIP + bool + depends on ARCH_ROCKCHIP diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index 4eb1656..39982ff 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_CLOCKSOURCE_MVEBU) += mvebu.o obj-$(CONFIG_CLOCKSOURCE_NOMADIK) += nomadik.o obj-$(CONFIG_CLOCKSOURCE_ORION) += orion.o obj-$(CONFIG_CLOCKSOURCE_UEMD) += uemd.o +obj-$(CONFIG_CLOCKSOURCE_ROCKCHIP)+= rk_timer.o diff --git a/drivers/clocksource/rk_timer.c b/drivers/clocksource/rk_timer.c new file mode 100644 index 0000000..baa517c --- /dev/null +++ b/drivers/clocksource/rk_timer.c @@ -0,0 +1,73 @@ +/* + * (C) Copyright 2015 Rockchip Electronics Co., Ltd + * + * (C) Copyright 2016 PHYTEC Messtechnik GmbH + * Author: Wadim Egorov + + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +struct rk_timer *timer_ptr; + +static uint64_t rockchip_get_ticks(void) +{ + uint64_t timebase_h, timebase_l; + + timebase_l = readl(&timer_ptr->timer_curr_value0); + timebase_h = readl(&timer_ptr->timer_curr_value1); + + return timebase_h << 32 | timebase_l; +} + +static struct clocksource rkcs = { + .read = rockchip_get_ticks, + .mask = CLOCKSOURCE_MASK(32), + .shift = 10, +}; + +static int rockchip_timer_probe(struct device_d *dev) +{ + struct resource *iores; + + iores = dev_request_mem_resource(dev, 0); + if (IS_ERR(iores)) + return PTR_ERR(iores); + timer_ptr = IOMEM(iores->start) + 0x20 * CONFIG_RK_TIMER; + + rkcs.mult = clocksource_hz2mult(OSC_HZ, rkcs.shift); + + writel(0xffffffff, &timer_ptr->timer_load_count0); + writel(0xffffffff, &timer_ptr->timer_load_count1); + writel(1, &timer_ptr->timer_ctrl_reg); + + return init_clock(&rkcs); +} + +static __maybe_unused struct of_device_id rktimer_dt_ids[] = { + { + .compatible = "rockchip,rk3288-timer", + }, { + /* sentinel */ + } +}; + +static struct driver_d rktimer_driver = { + .name = "rockchip-timer", + .probe = rockchip_timer_probe, + .of_compatible = DRV_OF_COMPAT(rktimer_dt_ids), +}; + +static int rktimer_init(void) +{ + return platform_driver_register(&rktimer_driver); +} +core_initcall(rktimer_init); -- 1.9.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox