From patchwork Tue Jun 8 15:22:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 12307171 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B0A3C47082 for ; Tue, 8 Jun 2021 15:24:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E71C8613AB for ; Tue, 8 Jun 2021 15:24:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232000AbhFHP0S (ORCPT ); Tue, 8 Jun 2021 11:26:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:46478 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231796AbhFHP0F (ORCPT ); Tue, 8 Jun 2021 11:26:05 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BE71F6128E; Tue, 8 Jun 2021 15:24:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1623165852; bh=JI2j1dnjT5tafECrq0BoZAj5GouU6dhToW2nFUxvGQw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=P/iuvcRKuKl3uD/X3AvIgWpjaKOF8OXnssJcD/JJLU6giJAvdzBzYTXZHJuK75Ovq JvVw1eDB/8RK6kGN0N7cwnEBq0MRJUw78kb/UwtoiRZNQyzCrfNE3o+njxXJAKRywU AkymstBhRNZ4GbNwKa3LV7cVlXvJef2FcnBeC7o20fx6qodCMlSLdy5m07FjyFWzUY yj5PcWmNZOTumAyeGZ/t7hGfbPmPm/QUlAsTXKvkG48STvWB8LkaM2PxKGVf3gy8xa qj5IFD7B86Z/2H5A8gEJs+MW5KM+UkeZJK6VFtJB5I+k/uhimsX9+O7LywaB1+oN+k OKIZWyhVI9Vvw== From: Arnd Bergmann To: linux-clk@vger.kernel.org, Stephen Boyd Cc: Arnd Bergmann , Dmitry Osipenko , Florian Fainelli , Geert Uytterhoeven , Greg Ungerer , John Crispin , Jonas Gorski , Krzysztof Kozlowski , Michael Turquette , Russell King , Thomas Bogendoerfer , linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/7] mips: ar7: convert to CONFIG_COMMON_CLK Date: Tue, 8 Jun 2021 17:22:09 +0200 Message-Id: <20210608152214.1231666-3-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210608152214.1231666-1-arnd@kernel.org> References: <20210608152214.1231666-1-arnd@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org From: Arnd Bergmann Perform a minimal conversion of the ar7 clock implementation to the common clock framework. While the hardware can control the rates, this is left unchanged, and all clocks are registered as fixed-rate or fixed-divider clocks. Similarly, the clkdev lookup information is left unchanged but moved from the table format into individual allocations. There is a small increase in code size: text data bss dec hex filename 4757116 596640 91328 5445084 5315dc vmlinux-before 4806159 602360 91344 5499863 53ebd7 vmlinux-after Signed-off-by: Arnd Bergmann --- arch/mips/Kconfig | 3 +- arch/mips/ar7/clock.c | 102 ++++++++------------------- arch/mips/include/asm/mach-ar7/ar7.h | 4 -- 3 files changed, 29 insertions(+), 80 deletions(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 1cc03a7652a9..5dbc60adb2f0 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -201,6 +201,7 @@ config MIPS_ALCHEMY config AR7 bool "Texas Instruments AR7" select BOOT_ELF32 + select COMMON_CLK select DMA_NONCOHERENT select CEVT_R4K select CSRC_R4K @@ -215,8 +216,6 @@ config AR7 select SYS_SUPPORTS_ZBOOT_UART16550 select GPIOLIB select VLYNQ - select CLKDEV_LOOKUP - select HAVE_LEGACY_CLK help Support for the Texas Instruments AR7 System-on-a-Chip family: TNETD7100, 7200 and 7300. diff --git a/arch/mips/ar7/clock.c b/arch/mips/ar7/clock.c index e8648e3eb27b..c717acbc5506 100644 --- a/arch/mips/ar7/clock.c +++ b/arch/mips/ar7/clock.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -85,17 +86,17 @@ struct tnetd7200_clocks { struct tnetd7200_clock usb; }; -static struct clk bus_clk = { +struct clk_rate { + u32 rate; +}; +static struct clk_rate bus_clk = { .rate = 125000000, }; -static struct clk cpu_clk = { +static struct clk_rate cpu_clk = { .rate = 150000000, }; -static struct clk dsp_clk; -static struct clk vbus_clk; - static void approximate(int base, int target, int *prediv, int *postdiv, int *mul) { @@ -241,6 +242,8 @@ static void __init tnetd7300_init_clocks(void) struct tnetd7300_clocks *clocks = ioremap(UR8_REGS_CLOCKS, sizeof(struct tnetd7300_clocks)); + u32 dsp_clk; + struct clk *clk; bus_clk.rate = tnetd7300_get_clock(BUS_PLL_SOURCE_SHIFT, &clocks->bus, bootcr, AR7_AFE_CLOCK); @@ -251,12 +254,18 @@ static void __init tnetd7300_init_clocks(void) else cpu_clk.rate = bus_clk.rate; - if (dsp_clk.rate == 250000000) + dsp_clk = tnetd7300_dsp_clock(); + if (dsp_clk == 250000000) tnetd7300_set_clock(DSP_PLL_SOURCE_SHIFT, &clocks->dsp, - bootcr, dsp_clk.rate); + bootcr, dsp_clk); iounmap(clocks); iounmap(bootcr); + + clk = clk_register_fixed_rate(NULL, "cpu", NULL, 0, cpu_clk.rate); + clkdev_create(clk, "cpu", NULL); + clk = clk_register_fixed_rate(NULL, "dsp", NULL, 0, dsp_clk); + clkdev_create(clk, "dsp", NULL); } static void tnetd7200_set_clock(int base, struct tnetd7200_clock *clock, @@ -328,6 +337,7 @@ static void __init tnetd7200_init_clocks(void) int cpu_base, cpu_mul, cpu_prediv, cpu_postdiv; int dsp_base, dsp_mul, dsp_prediv, dsp_postdiv; int usb_base, usb_mul, usb_prediv, usb_postdiv; + struct clk *clk; cpu_base = tnetd7200_get_clock_base(TNETD7200_CLOCK_ID_CPU, bootcr); dsp_base = tnetd7200_get_clock_base(TNETD7200_CLOCK_ID_DSP, bootcr); @@ -396,90 +406,34 @@ static void __init tnetd7200_init_clocks(void) usb_prediv, usb_postdiv, -1, usb_mul, TNETD7200_DEF_USB_CLK); - dsp_clk.rate = cpu_clk.rate; - iounmap(clocks); iounmap(bootcr); -} - -/* - * Linux clock API - */ -int clk_enable(struct clk *clk) -{ - return 0; -} -EXPORT_SYMBOL(clk_enable); -void clk_disable(struct clk *clk) -{ + clk = clk_register_fixed_rate(NULL, "cpu", NULL, 0, cpu_clk.rate); + clkdev_create(clk, "cpu", NULL); + clkdev_create(clk, "dsp", NULL); } -EXPORT_SYMBOL(clk_disable); - -unsigned long clk_get_rate(struct clk *clk) -{ - if (!clk) - return 0; - - return clk->rate; -} -EXPORT_SYMBOL(clk_get_rate); - -static struct clk_lookup ar7_clkdev_table[] = { - CLKDEV_INIT(NULL, "bus", &bus_clk), - /* cpmac and vbus share the same rate */ - CLKDEV_INIT("cpmac.0", "cpmac", &vbus_clk), - CLKDEV_INIT("cpmac.1", "cpmac", &vbus_clk), - CLKDEV_INIT(NULL, "cpu", &cpu_clk), - CLKDEV_INIT(NULL, "dsp", &dsp_clk), - CLKDEV_INIT(NULL, "vbus", &vbus_clk), -}; void __init ar7_init_clocks(void) { + struct clk *clk; + switch (ar7_chip_id()) { case AR7_CHIP_7100: case AR7_CHIP_7200: tnetd7200_init_clocks(); break; case AR7_CHIP_7300: - dsp_clk.rate = tnetd7300_dsp_clock(); tnetd7300_init_clocks(); break; default: break; } + clk = clk_register_fixed_rate(NULL, "bus", NULL, 0, bus_clk.rate); + clkdev_create(clk, "bus", NULL); /* adjust vbus clock rate */ - vbus_clk.rate = bus_clk.rate / 2; - - clkdev_add_table(ar7_clkdev_table, ARRAY_SIZE(ar7_clkdev_table)); -} - -/* dummy functions, should not be called */ -long clk_round_rate(struct clk *clk, unsigned long rate) -{ - WARN_ON(clk); - return 0; -} -EXPORT_SYMBOL(clk_round_rate); - -int clk_set_rate(struct clk *clk, unsigned long rate) -{ - WARN_ON(clk); - return 0; -} -EXPORT_SYMBOL(clk_set_rate); - -int clk_set_parent(struct clk *clk, struct clk *parent) -{ - WARN_ON(clk); - return 0; -} -EXPORT_SYMBOL(clk_set_parent); - -struct clk *clk_get_parent(struct clk *clk) -{ - WARN_ON(clk); - return NULL; + clk = clk_register_fixed_factor(NULL, "vbus", "bus", 0, 1, 2); + clkdev_create(clk, "vbus", NULL); + clkdev_create(clk, "cpmac", "cpmac.1"); + clkdev_create(clk, "cpmac", "cpmac.1"); } -EXPORT_SYMBOL(clk_get_parent); diff --git a/arch/mips/include/asm/mach-ar7/ar7.h b/arch/mips/include/asm/mach-ar7/ar7.h index dd09c3bf0601..cbe75ade3277 100644 --- a/arch/mips/include/asm/mach-ar7/ar7.h +++ b/arch/mips/include/asm/mach-ar7/ar7.h @@ -131,10 +131,6 @@ static inline u8 ar7_chip_rev(void) 0x14))) >> 16) & 0xff; } -struct clk { - unsigned int rate; -}; - static inline int ar7_has_high_cpmac(void) { u16 chip_id = ar7_chip_id();