From patchwork Fri Jun 30 16:58:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neil Armstrong X-Patchwork-Id: 698261 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5398EB64DA for ; Fri, 30 Jun 2023 16:58:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232584AbjF3Q6z (ORCPT ); Fri, 30 Jun 2023 12:58:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54362 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232641AbjF3Q6q (ORCPT ); Fri, 30 Jun 2023 12:58:46 -0400 Received: from mail-wm1-x336.google.com (mail-wm1-x336.google.com [IPv6:2a00:1450:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D7BCE3C17 for ; Fri, 30 Jun 2023 09:58:42 -0700 (PDT) Received: by mail-wm1-x336.google.com with SMTP id 5b1f17b1804b1-3fbc1218262so19147195e9.3 for ; Fri, 30 Jun 2023 09:58:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1688144321; x=1690736321; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=dmOMajD2YZSE+eel7VcvLzIVOnwOse/rnS6+x3C70yU=; b=FyShIEE8ur0fhetXt5zPzBSidrR54AJP5/e2Lw//yreQyw4erZQfmV8a+V/FjlusBq w8I0pbS/rPj775Mz6f2JIvefOIDOXJ5nZDkbsxuiYNYm82CliA0Fe4T5CMTPe+4pj6m9 H0RAW3JW8o5zTswmguMhgLlexP1RDfrlWXQvTK9/l5rWtLXfmNBGk/eb2PqgKRI0y1Bt KCdEqNdhgr5mUpeFZvuyZyhqWLRO8uV6NbbCtwYx3KtXO1iaFUnjCWu61m0zQLORIRua P4sHQFpSstj8NE5tkZ8I6XQnGgrW5O+J2M1Pnmihjo/DOXizWAgltrSKlRNBjh2vtCdu RD/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688144321; x=1690736321; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=dmOMajD2YZSE+eel7VcvLzIVOnwOse/rnS6+x3C70yU=; b=DN5rSiFxKNyhMhyZJBGstpsrBQy3ydyMd5cfINcfD87IwYFdPHBxQu/PlMzrLChWnY rvcX0Dw45ikuTjxGlCA/bjgEqnQ7v5FPF9FurSHCk9fIWg76bpFNt913LVMREtkKHYqU 5/ldtiZ9X0jFF42K08/RHPELJBeHToPpkan0rDK1jdr5+AMw10qRJLBvjJtbronk5s90 yQTJky8CsU4tT++I6G6I7yExHAr4Y/KqBkRx633x7FFKR0qXDCtfDsP0t3rcOvN8YoOV dVizsaqQ9qdVj4JLNPYJHHkj+4wyjUfG2bGhJAkOuRy1qk8g7Cq5/BO5qW/8VpP46/Wl TRcg== X-Gm-Message-State: ABy/qLY/6Ws9GGoeGzgUaQuDgTyNQbzBWderm/xhz59dQ9e/G/FpJaVM 65C3YavxMAf6sAUpMBmRGN8giw== X-Google-Smtp-Source: APBJJlH+WLO58Dsl5GTbdy9kidf6z2vq4lgBCLoHMljM4mx0veKMawVUIe+m9zc/05aH2be2DXGCOw== X-Received: by 2002:adf:dc84:0:b0:313:e591:94ec with SMTP id r4-20020adfdc84000000b00313e59194ecmr2412436wrj.67.1688144320967; Fri, 30 Jun 2023 09:58:40 -0700 (PDT) Received: from arrakeen.starnux.net ([2a01:e0a:982:cbb0:52eb:f6ff:feb3:451a]) by smtp.gmail.com with ESMTPSA id u14-20020adfdb8e000000b003112ab916cdsm18913772wri.73.2023.06.30.09.58.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Jun 2023 09:58:40 -0700 (PDT) From: Neil Armstrong Date: Fri, 30 Jun 2023 18:58:28 +0200 Subject: [PATCH v2 03/15] clksource: timer-oxnas-rps: remove obsolete timer driver MIME-Version: 1.0 Message-Id: <20230630-topic-oxnas-upstream-remove-v2-3-fb6ab3dea87c@linaro.org> References: <20230630-topic-oxnas-upstream-remove-v2-0-fb6ab3dea87c@linaro.org> In-Reply-To: <20230630-topic-oxnas-upstream-remove-v2-0-fb6ab3dea87c@linaro.org> To: Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Daniel Lezcano , Thomas Gleixner , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Linus Walleij , Bartosz Golaszewski , Andy Shevchenko , Sebastian Reichel , Marc Zyngier Cc: linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-mtd@lists.infradead.org, netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, linux-pm@vger.kernel.org, linux-oxnas@groups.io, Neil Armstrong , Arnd Bergmann , Daniel Golle X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=9387; i=neil.armstrong@linaro.org; h=from:subject:message-id; bh=OS+eBvSlx7DwBmhrfLY6QF+vMfbdyLJj8rLmG2ne3WQ=; b=owEBbQKS/ZANAwAKAXfc29rIyEnRAcsmYgBknwm1abamxIw9Q1cu56fLZ7ZrcsS8fTUVPjdmIPHm 8tI36nqJAjMEAAEKAB0WIQQ9U8YmyFYF/h30LIt33NvayMhJ0QUCZJ8JtQAKCRB33NvayMhJ0Ug+D/ 9iCGhYuRWDonKOcmDlJ5tRofvt7eO4c5xe+WnpQD0GlxL98f4NbqpB+vI+jQ0hBN6gP5apCF2fNze+ DbTRJZ1XVv44EbFpJ60Hcf95zAF3x4aYpNv0hBC4M/bNZ3FILAkVhPxVxWIIZuaTBNxRmycnLTB10r S81L9sUzDXhmHUSjM9XiDMsNf76LOSt6o2/VMz6becHzPBhy27MptVdUdET3CBa2ZSZHSKs32LBE0k 6L9UJ7QiX3RnZ25PrfUucLceECUeCutDAvoJXB1FMm1tsBBzLK0aQCXLk+b351leW4VJNBoIjgPmj6 2q0HkmSwAhnLgzEZGQZ/ISzLHj+hrc2fNxfx2Bvxk/mKHDsllz0u9s0FBVI77cGxhoza3yxLv48XZp vAw3m46ZiOzFBiaHsnNSCwvP3Y8q6rcTHgHJgUQDV7LkCt6UnNvT9BCXeo/GMHbzthYPIQPlKvTavN pP6uCdH3OvGh6d7Z3+k51mL6s0aEEypFNT6RRHnRbWjDLpt9MthqUiJcq9LUIL+0CjKYq8mRR2tTlx DCgE0wddZ2pIKF1LpncBc+TiRHtVT/lCOWqwQFb9NeDF49v3HlG9A4jK1oRH7AKsswGD9TluRtbIDi euhdRsyZH+fi+P7TeyHZlj5EGlr3kc/MHtKW2fXGj269nr0qVt8PuO2FURyQ== X-Developer-Key: i=neil.armstrong@linaro.org; a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Due to lack of maintenance and stall of development for a few years now, and since no new features will ever be added upstream, remove support for OX810 and OX820 timer. Acked-by: Linus Walleij Acked-by: Arnd Bergmann Acked-by: Daniel Golle Signed-off-by: Neil Armstrong --- drivers/clocksource/Kconfig | 7 - drivers/clocksource/Makefile | 1 - drivers/clocksource/timer-oxnas-rps.c | 288 ---------------------------------- 3 files changed, 296 deletions(-) diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index c4d671a5a13d..0ba0dc4ecf06 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -461,13 +461,6 @@ config VF_PIT_TIMER help Support for Periodic Interrupt Timer on Freescale Vybrid Family SoCs. -config OXNAS_RPS_TIMER - bool "Oxford Semiconductor OXNAS RPS Timers driver" if COMPILE_TEST - select TIMER_OF - select CLKSRC_MMIO - help - This enables support for the Oxford Semiconductor OXNAS RPS timers. - config SYS_SUPPORTS_SH_CMT bool diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index 5d93c9e3fc55..368c3461dab8 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -54,7 +54,6 @@ obj-$(CONFIG_MTK_TIMER) += timer-mediatek.o obj-$(CONFIG_MTK_CPUX_TIMER) += timer-mediatek-cpux.o obj-$(CONFIG_CLKSRC_PISTACHIO) += timer-pistachio.o obj-$(CONFIG_CLKSRC_TI_32K) += timer-ti-32k.o -obj-$(CONFIG_OXNAS_RPS_TIMER) += timer-oxnas-rps.o obj-$(CONFIG_OWL_TIMER) += timer-owl.o obj-$(CONFIG_MILBEAUT_TIMER) += timer-milbeaut.o obj-$(CONFIG_SPRD_TIMER) += timer-sprd.o diff --git a/drivers/clocksource/timer-oxnas-rps.c b/drivers/clocksource/timer-oxnas-rps.c deleted file mode 100644 index d514b44e67dd..000000000000 --- a/drivers/clocksource/timer-oxnas-rps.c +++ /dev/null @@ -1,288 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * drivers/clocksource/timer-oxnas-rps.c - * - * Copyright (C) 2009 Oxford Semiconductor Ltd - * Copyright (C) 2013 Ma Haijun - * Copyright (C) 2016 Neil Armstrong - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* TIMER1 used as tick - * TIMER2 used as clocksource - */ - -/* Registers definitions */ - -#define TIMER_LOAD_REG 0x0 -#define TIMER_CURR_REG 0x4 -#define TIMER_CTRL_REG 0x8 -#define TIMER_CLRINT_REG 0xC - -#define TIMER_BITS 24 - -#define TIMER_MAX_VAL (BIT(TIMER_BITS) - 1) - -#define TIMER_PERIODIC BIT(6) -#define TIMER_ENABLE BIT(7) - -#define TIMER_DIV1 (0) -#define TIMER_DIV16 (1 << 2) -#define TIMER_DIV256 (2 << 2) - -#define TIMER1_REG_OFFSET 0 -#define TIMER2_REG_OFFSET 0x20 - -/* Clockevent & Clocksource data */ - -struct oxnas_rps_timer { - struct clock_event_device clkevent; - void __iomem *clksrc_base; - void __iomem *clkevt_base; - unsigned long timer_period; - unsigned int timer_prescaler; - struct clk *clk; - int irq; -}; - -static irqreturn_t oxnas_rps_timer_irq(int irq, void *dev_id) -{ - struct oxnas_rps_timer *rps = dev_id; - - writel_relaxed(0, rps->clkevt_base + TIMER_CLRINT_REG); - - rps->clkevent.event_handler(&rps->clkevent); - - return IRQ_HANDLED; -} - -static void oxnas_rps_timer_config(struct oxnas_rps_timer *rps, - unsigned long period, - unsigned int periodic) -{ - uint32_t cfg = rps->timer_prescaler; - - if (period) - cfg |= TIMER_ENABLE; - - if (periodic) - cfg |= TIMER_PERIODIC; - - writel_relaxed(period, rps->clkevt_base + TIMER_LOAD_REG); - writel_relaxed(cfg, rps->clkevt_base + TIMER_CTRL_REG); -} - -static int oxnas_rps_timer_shutdown(struct clock_event_device *evt) -{ - struct oxnas_rps_timer *rps = - container_of(evt, struct oxnas_rps_timer, clkevent); - - oxnas_rps_timer_config(rps, 0, 0); - - return 0; -} - -static int oxnas_rps_timer_set_periodic(struct clock_event_device *evt) -{ - struct oxnas_rps_timer *rps = - container_of(evt, struct oxnas_rps_timer, clkevent); - - oxnas_rps_timer_config(rps, rps->timer_period, 1); - - return 0; -} - -static int oxnas_rps_timer_set_oneshot(struct clock_event_device *evt) -{ - struct oxnas_rps_timer *rps = - container_of(evt, struct oxnas_rps_timer, clkevent); - - oxnas_rps_timer_config(rps, rps->timer_period, 0); - - return 0; -} - -static int oxnas_rps_timer_next_event(unsigned long delta, - struct clock_event_device *evt) -{ - struct oxnas_rps_timer *rps = - container_of(evt, struct oxnas_rps_timer, clkevent); - - oxnas_rps_timer_config(rps, delta, 0); - - return 0; -} - -static int __init oxnas_rps_clockevent_init(struct oxnas_rps_timer *rps) -{ - ulong clk_rate = clk_get_rate(rps->clk); - ulong timer_rate; - - /* Start with prescaler 1 */ - rps->timer_prescaler = TIMER_DIV1; - rps->timer_period = DIV_ROUND_UP(clk_rate, HZ); - timer_rate = clk_rate; - - if (rps->timer_period > TIMER_MAX_VAL) { - rps->timer_prescaler = TIMER_DIV16; - timer_rate = clk_rate / 16; - rps->timer_period = DIV_ROUND_UP(timer_rate, HZ); - } - if (rps->timer_period > TIMER_MAX_VAL) { - rps->timer_prescaler = TIMER_DIV256; - timer_rate = clk_rate / 256; - rps->timer_period = DIV_ROUND_UP(timer_rate, HZ); - } - - rps->clkevent.name = "oxnas-rps"; - rps->clkevent.features = CLOCK_EVT_FEAT_PERIODIC | - CLOCK_EVT_FEAT_ONESHOT | - CLOCK_EVT_FEAT_DYNIRQ; - rps->clkevent.tick_resume = oxnas_rps_timer_shutdown; - rps->clkevent.set_state_shutdown = oxnas_rps_timer_shutdown; - rps->clkevent.set_state_periodic = oxnas_rps_timer_set_periodic; - rps->clkevent.set_state_oneshot = oxnas_rps_timer_set_oneshot; - rps->clkevent.set_next_event = oxnas_rps_timer_next_event; - rps->clkevent.rating = 200; - rps->clkevent.cpumask = cpu_possible_mask; - rps->clkevent.irq = rps->irq; - clockevents_config_and_register(&rps->clkevent, - timer_rate, - 1, - TIMER_MAX_VAL); - - pr_info("Registered clock event rate %luHz prescaler %x period %lu\n", - clk_rate, - rps->timer_prescaler, - rps->timer_period); - - return 0; -} - -/* Clocksource */ - -static void __iomem *timer_sched_base; - -static u64 notrace oxnas_rps_read_sched_clock(void) -{ - return ~readl_relaxed(timer_sched_base); -} - -static int __init oxnas_rps_clocksource_init(struct oxnas_rps_timer *rps) -{ - ulong clk_rate = clk_get_rate(rps->clk); - int ret; - - /* use prescale 16 */ - clk_rate = clk_rate / 16; - - writel_relaxed(TIMER_MAX_VAL, rps->clksrc_base + TIMER_LOAD_REG); - writel_relaxed(TIMER_PERIODIC | TIMER_ENABLE | TIMER_DIV16, - rps->clksrc_base + TIMER_CTRL_REG); - - timer_sched_base = rps->clksrc_base + TIMER_CURR_REG; - sched_clock_register(oxnas_rps_read_sched_clock, - TIMER_BITS, clk_rate); - ret = clocksource_mmio_init(timer_sched_base, - "oxnas_rps_clocksource_timer", - clk_rate, 250, TIMER_BITS, - clocksource_mmio_readl_down); - if (WARN_ON(ret)) { - pr_err("can't register clocksource\n"); - return ret; - } - - pr_info("Registered clocksource rate %luHz\n", clk_rate); - - return 0; -} - -static int __init oxnas_rps_timer_init(struct device_node *np) -{ - struct oxnas_rps_timer *rps; - void __iomem *base; - int ret; - - rps = kzalloc(sizeof(*rps), GFP_KERNEL); - if (!rps) - return -ENOMEM; - - rps->clk = of_clk_get(np, 0); - if (IS_ERR(rps->clk)) { - ret = PTR_ERR(rps->clk); - goto err_alloc; - } - - ret = clk_prepare_enable(rps->clk); - if (ret) - goto err_clk; - - base = of_iomap(np, 0); - if (!base) { - ret = -ENXIO; - goto err_clk_prepare; - } - - rps->irq = irq_of_parse_and_map(np, 0); - if (!rps->irq) { - ret = -EINVAL; - goto err_iomap; - } - - rps->clkevt_base = base + TIMER1_REG_OFFSET; - rps->clksrc_base = base + TIMER2_REG_OFFSET; - - /* Disable timers */ - writel_relaxed(0, rps->clkevt_base + TIMER_CTRL_REG); - writel_relaxed(0, rps->clksrc_base + TIMER_CTRL_REG); - writel_relaxed(0, rps->clkevt_base + TIMER_LOAD_REG); - writel_relaxed(0, rps->clksrc_base + TIMER_LOAD_REG); - writel_relaxed(0, rps->clkevt_base + TIMER_CLRINT_REG); - writel_relaxed(0, rps->clksrc_base + TIMER_CLRINT_REG); - - ret = request_irq(rps->irq, oxnas_rps_timer_irq, - IRQF_TIMER | IRQF_IRQPOLL, - "rps-timer", rps); - if (ret) - goto err_iomap; - - ret = oxnas_rps_clocksource_init(rps); - if (ret) - goto err_irqreq; - - ret = oxnas_rps_clockevent_init(rps); - if (ret) - goto err_irqreq; - - return 0; - -err_irqreq: - free_irq(rps->irq, rps); -err_iomap: - iounmap(base); -err_clk_prepare: - clk_disable_unprepare(rps->clk); -err_clk: - clk_put(rps->clk); -err_alloc: - kfree(rps); - - return ret; -} - -TIMER_OF_DECLARE(ox810se_rps, - "oxsemi,ox810se-rps-timer", oxnas_rps_timer_init); -TIMER_OF_DECLARE(ox820_rps, - "oxsemi,ox820-rps-timer", oxnas_rps_timer_init);