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[139.178.88.99]) by mx.google.com with ESMTPS id a5-20020a170902ecc500b001dbc4b86950si8440383plh.391.2024.02.21.10.23.55 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Feb 2024 10:23:55 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-75274-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99; Authentication-Results: mx.google.com; dkim=pass header.i=@bootlin.com header.s=gm1 header.b="QqjjysG/"; arc=pass (i=1 spf=pass spfdomain=bootlin.com dkim=pass dkdomain=bootlin.com dmarc=pass fromdomain=bootlin.com); spf=pass (google.com: domain of linux-kernel+bounces-75274-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-75274-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=bootlin.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id EE38C2857A1 for ; Wed, 21 Feb 2024 18:23:54 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id B1E1C86AFE; Wed, 21 Feb 2024 18:22:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="QqjjysG/" Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1A7688594C; Wed, 21 Feb 2024 18:22:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708539743; cv=none; b=JooZGqc1C4EGqi3EWtOJU/y8hbR3FRd4agEvIShGCfEqFHvg6hTqkeFUMc7QjQVWvo1z/toumgr3JPBKORPMa7jQDm7bLuYZToYitwNr/28yy/5v84BwFuwdafPRhWSL2t6uVGvma6M1sOjC13SnjGZ9HuOWkXHL6s6b0Gao06c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708539743; c=relaxed/simple; bh=sihxUJTDQsuJsmzeLS2foB9IYSxjbyoyjsoB1SQ7NqU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=dfu+PjsUSJl1xTlBljMfn+OimZa0zWBpqB2cBZJToCnHY/hkA/FrFNhNbz9ghI7eIG72DVhRwxaYxuQD26GQ1W6eyiwBfPix3ybNVN+g4yytEQNmZI0UqPrYu77xO6eEcihkqK0pBn9wq09rhbSSWlOED1CqCbY9YY3iaoCdnjk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=QqjjysG/; arc=none smtp.client-ip=217.70.183.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Received: by mail.gandi.net (Postfix) with ESMTPSA id 76A521C0011; Wed, 21 Feb 2024 18:22:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708539738; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RMsyyu5pRiHOx1QBrjfjwnJh4I/8aPUzWqHwYQNyeU4=; b=QqjjysG/j9cPeFRiD2gJrBY+iTFiDL+LfBLAHl2XL6+mlYdK8hMHIXwD/mfHPEoLUE8TQd yFePpkdiEIuVetzq533TFG97asB4fSGfPD8shw0HHmlrgoIcnROwqDx2ddt742aqbP3sFo U41d0uerZQdxOMi0O5Dmi85w2Zu7t1I1S7mkQGa5zG+2Tq5kn7Vimw2H4CTSgFoUXiCAt9 zlxCzuSOmonI8ErRxwPgC5SFBlg+OE6LHu7v6cE3PFqD/kZEUof7aOnq2dpe6xS95Ka7jL koshROUeH0f2BpcWqp+drI05O31RKTNEiBag0gZ1zwnDsQLDCWnmzID9f6aXew== From: =?utf-8?q?Th=C3=A9o_Lebrun?= Date: Wed, 21 Feb 2024 19:22:15 +0100 Subject: [PATCH v7 07/14] clk: eyeq5: add platform driver, and init routine at of_clk_init() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20240221-mbly-clk-v7-7-31d4ce3630c3@bootlin.com> References: <20240221-mbly-clk-v7-0-31d4ce3630c3@bootlin.com> In-Reply-To: <20240221-mbly-clk-v7-0-31d4ce3630c3@bootlin.com> To: Gregory CLEMENT , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Bogendoerfer , Linus Walleij , =?utf-8?q?Rafa=C5=82_Mi=C5=82ecki?= , Philipp Zabel Cc: Vladimir Kondratiev , linux-mips@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni , Tawfik Bayouk , linux-gpio@vger.kernel.org, =?utf-8?q?Th=C3=A9o_Lebrun?= X-Mailer: b4 0.13.0 X-GND-Sasl: theo.lebrun@bootlin.com Add the Mobileye EyeQ5 clock controller driver. It might grow to add support for other platforms from Mobileye. It handles 10 read-only PLLs derived from the main crystal on board. It exposes a table-based divider clock used for OSPI. Other platform clocks are not configurable and therefore kept as fixed-factor devicetree nodes. Two PLLs are required early on and are therefore registered at of_clk_init(). Those are pll-cpu for the GIC timer and pll-per for the UARTs. Signed-off-by: Théo Lebrun --- drivers/clk/Kconfig | 11 ++ drivers/clk/Makefile | 1 + drivers/clk/clk-eyeq5.c | 289 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 301 insertions(+) diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 50af5fc7f570..d5043ce2a75c 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -218,6 +218,17 @@ config COMMON_CLK_EN7523 This driver provides the fixed clocks and gates present on Airoha ARM silicon. +config COMMON_CLK_EYEQ5 + bool "Clock driver for the Mobileye EyeQ5 platform" + depends on OF + depends on MACH_EYEQ5 || COMPILE_TEST + default MACH_EYEQ5 + help + This driver provides the clocks found on the Mobileye EyeQ5 SoC. Its + registers live in a shared register region called OLB. It provides 10 + read-only PLLs derived from the main crystal clock which must be constant + and one divider clock based on one PLL. + config COMMON_CLK_FSL_FLEXSPI tristate "Clock driver for FlexSPI on Layerscape SoCs" depends on ARCH_LAYERSCAPE || COMPILE_TEST diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 14fa8d4ecc1f..81c4d11ca437 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -32,6 +32,7 @@ obj-$(CONFIG_ARCH_CLPS711X) += clk-clps711x.o obj-$(CONFIG_COMMON_CLK_CS2000_CP) += clk-cs2000-cp.o obj-$(CONFIG_ARCH_SPARX5) += clk-sparx5.o obj-$(CONFIG_COMMON_CLK_EN7523) += clk-en7523.o +obj-$(CONFIG_COMMON_CLK_EYEQ5) += clk-eyeq5.o obj-$(CONFIG_COMMON_CLK_FIXED_MMIO) += clk-fixed-mmio.o obj-$(CONFIG_COMMON_CLK_FSL_FLEXSPI) += clk-fsl-flexspi.o obj-$(CONFIG_COMMON_CLK_FSL_SAI) += clk-fsl-sai.o diff --git a/drivers/clk/clk-eyeq5.c b/drivers/clk/clk-eyeq5.c new file mode 100644 index 000000000000..9598139e0383 --- /dev/null +++ b/drivers/clk/clk-eyeq5.c @@ -0,0 +1,289 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * PLL clock driver for the Mobileye EyeQ5 platform. + * + * This controller handles 10 read-only PLLs, all derived from the same main + * crystal clock. It also exposes one divider clock, a child of one of the + * PLLs. The parent clock is expected to be constant. This driver's registers + * live in a shared region called OLB. Two PLLs must be initialized by + * of_clk_init(). + * + * We use eq5c_ as prefix, as-in "EyeQ5 Clock", but way shorter. + * + * Copyright (C) 2024 Mobileye Vision Technologies Ltd. + */ + +#define pr_fmt(fmt) "clk-eyeq5: " fmt + +#include +#include +#include +#include +#include +#include + +#include + +/* In frac mode, it enables fractional noise canceling DAC. Else, no function. */ +#define PCSR0_DAC_EN BIT(0) +/* Fractional or integer mode */ +#define PCSR0_DSM_EN BIT(1) +#define PCSR0_PLL_EN BIT(2) +/* All clocks output held at 0 */ +#define PCSR0_FOUTPOSTDIV_EN BIT(3) +#define PCSR0_POST_DIV1 GENMASK(6, 4) +#define PCSR0_POST_DIV2 GENMASK(9, 7) +#define PCSR0_REF_DIV GENMASK(15, 10) +#define PCSR0_INTIN GENMASK(27, 16) +#define PCSR0_BYPASS BIT(28) +/* Bits 30..29 are reserved */ +#define PCSR0_PLL_LOCKED BIT(31) + +#define PCSR1_RESET BIT(0) +#define PCSR1_SSGC_DIV GENMASK(4, 1) +/* Spread amplitude (% = 0.1 * SPREAD[4:0]) */ +#define PCSR1_SPREAD GENMASK(9, 5) +#define PCSR1_DIS_SSCG BIT(10) +/* Down-spread or center-spread */ +#define PCSR1_DOWN_SPREAD BIT(11) +#define PCSR1_FRAC_IN GENMASK(31, 12) + +static struct clk_hw_onecell_data *eq5c_clk_data; + +struct eq5c_pll { + int index; + const char *name; + u32 reg; /* next 8 bytes are r0 and r1 */ +}; + +/* Required early for the GIC timer (pll-cpu) and UARTs (pll-per). */ +static const struct eq5c_pll eq5c_early_plls[] = { + { .index = EQ5C_PLL_CPU, .name = "pll-cpu", .reg = 0x00, }, + { .index = EQ5C_PLL_PER, .name = "pll-per", .reg = 0x30, }, +}; + +static const struct eq5c_pll eq5c_plls[] = { + { .index = EQ5C_PLL_VMP, .name = "pll-vmp", .reg = 0x08, }, + { .index = EQ5C_PLL_PMA, .name = "pll-pma", .reg = 0x10, }, + { .index = EQ5C_PLL_VDI, .name = "pll-vdi", .reg = 0x18, }, + { .index = EQ5C_PLL_DDR0, .name = "pll-ddr0", .reg = 0x20, }, + { .index = EQ5C_PLL_PCI, .name = "pll-pci", .reg = 0x28, }, + { .index = EQ5C_PLL_PMAC, .name = "pll-pmac", .reg = 0x38, }, + { .index = EQ5C_PLL_MPC, .name = "pll-mpc", .reg = 0x40, }, + { .index = EQ5C_PLL_DDR1, .name = "pll-ddr1", .reg = 0x48, }, +}; + +#define EQ5C_OSPI_DIV_CLK_NAME "div-ospi" +#define EQ5C_OSPI_DIV_WIDTH 4 + +#define EQ5C_NB_CLKS (ARRAY_SIZE(eq5c_early_plls) + ARRAY_SIZE(eq5c_plls) + 1) + +static const struct clk_div_table eq5c_ospi_div_table[] = { + { .val = 0, .div = 2 }, + { .val = 1, .div = 4 }, + { .val = 2, .div = 6 }, + { .val = 3, .div = 8 }, + { .val = 4, .div = 10 }, + { .val = 5, .div = 12 }, + { .val = 6, .div = 14 }, + { .val = 7, .div = 16 }, + {} /* sentinel */ +}; + +static int eq5c_pll_parse_registers(u32 r0, u32 r1, unsigned long *mult, + unsigned long *div, unsigned long *acc) +{ + if (r0 & PCSR0_BYPASS) { + *mult = 1; + *div = 1; + *acc = 0; + return 0; + } + + if (!(r0 & PCSR0_PLL_LOCKED)) + return -EINVAL; + + *mult = FIELD_GET(PCSR0_INTIN, r0); + *div = FIELD_GET(PCSR0_REF_DIV, r0); + if (r0 & PCSR0_FOUTPOSTDIV_EN) + *div *= FIELD_GET(PCSR0_POST_DIV1, r0) * + FIELD_GET(PCSR0_POST_DIV2, r0); + + /* Fractional mode, in 2^20 (0x100000) parts. */ + if (r0 & PCSR0_DSM_EN) { + *div *= 0x100000; + *mult = *mult * 0x100000 + FIELD_GET(PCSR1_FRAC_IN, r1); + } + + if (!*mult || !*div) + return -EINVAL; + + /* Spread spectrum. */ + if (!(r1 & (PCSR1_RESET | PCSR1_DIS_SSCG))) { + /* + * Spread is 1/1000 parts of frequency, accuracy is half of + * that. To get accuracy, convert to ppb (parts per billion). + */ + u32 spread = FIELD_GET(PCSR1_SPREAD, r1); + *acc = spread * 500000; + if (r1 & PCSR1_DOWN_SPREAD) { + /* + * Downspreading: the central frequency is half a + * spread lower. + */ + *mult *= 2000 - spread; + *div *= 2000; + } + } else { + *acc = 0; + } + + return 0; +} + +static int eq5c_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + void __iomem *base_plls, *base_ospi; + struct clk_hw *hw; + int i; + + if (IS_ERR(eq5c_clk_data)) + return PTR_ERR(eq5c_clk_data); + else if (!eq5c_clk_data) + return -EINVAL; + + base_plls = devm_platform_ioremap_resource_byname(pdev, "plls"); + base_ospi = devm_platform_ioremap_resource_byname(pdev, "ospi"); + if (!base_plls || !base_ospi) + return -ENODEV; + + for (i = 0; i < ARRAY_SIZE(eq5c_plls); i++) { + const struct eq5c_pll *pll = &eq5c_plls[i]; + unsigned long mult, div, acc; + u32 r0, r1; + int ret; + + r0 = readl(base_plls + pll->reg); + r1 = readl(base_plls + pll->reg + sizeof(r0)); + + ret = eq5c_pll_parse_registers(r0, r1, &mult, &div, &acc); + if (ret) { + dev_warn(dev, "failed parsing state of %s\n", pll->name); + continue; + } + + hw = clk_hw_register_fixed_factor_with_accuracy_fwname(dev, np, + pll->name, "ref", 0, mult, div, acc); + eq5c_clk_data->hws[pll->index] = hw; + if (IS_ERR(hw)) { + dev_err(dev, "failed registering %s: %ld\n", + pll->name, PTR_ERR(hw)); + } + } + + hw = clk_hw_register_divider_table_parent_hw(dev, EQ5C_OSPI_DIV_CLK_NAME, + eq5c_clk_data->hws[EQ5C_PLL_PER], 0, + base_ospi, 0, EQ5C_OSPI_DIV_WIDTH, 0, + eq5c_ospi_div_table, NULL); + eq5c_clk_data->hws[EQ5C_DIV_OSPI] = hw; + if (IS_ERR(hw)) { + dev_err(dev, "failed registering %s: %ld\n", + EQ5C_OSPI_DIV_CLK_NAME, PTR_ERR(hw)); + } + + return 0; +} + +static const struct of_device_id eq5c_match_table[] = { + { .compatible = "mobileye,eyeq5-clk" }, + {} +}; +MODULE_DEVICE_TABLE(of, eq5c_match_table); + +static struct platform_driver eq5c_driver = { + .probe = eq5c_probe, + .driver = { + .name = "clk-eyeq5", + .of_match_table = eq5c_match_table, + }, +}; + +builtin_platform_driver(eq5c_driver); + +static void __init eq5c_init(struct device_node *np) +{ + void __iomem *base_plls, *base_ospi; + int index_plls, index_ospi; + int i, ret; + + eq5c_clk_data = kzalloc(struct_size(eq5c_clk_data, hws, EQ5C_NB_CLKS), + GFP_KERNEL); + if (!eq5c_clk_data) { + ret = -ENOMEM; + goto err; + } + + eq5c_clk_data->num = EQ5C_NB_CLKS; + + /* + * Mark all clocks as deferred. We register some now and others at + * platform device probe. + */ + for (i = 0; i < EQ5C_NB_CLKS; i++) + eq5c_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER); + + index_plls = of_property_match_string(np, "reg-names", "plls"); + index_ospi = of_property_match_string(np, "reg-names", "ospi"); + if (index_plls < 0 || index_ospi < 0) { + ret = -ENODEV; + goto err; + } + + base_plls = of_iomap(np, index_plls); + base_ospi = of_iomap(np, index_ospi); + if (!base_plls || !base_ospi) { + ret = -ENODEV; + goto err; + } + + for (i = 0; i < ARRAY_SIZE(eq5c_early_plls); i++) { + const struct eq5c_pll *pll = &eq5c_early_plls[i]; + unsigned long mult, div, acc; + struct clk_hw *hw; + u32 r0, r1; + + r0 = readl(base_plls + pll->reg); + r1 = readl(base_plls + pll->reg + sizeof(r0)); + + ret = eq5c_pll_parse_registers(r0, r1, &mult, &div, &acc); + if (ret) { + pr_warn("failed parsing state of %s\n", pll->name); + continue; + } + + hw = clk_hw_register_fixed_factor_with_accuracy_fwname(NULL, + np, pll->name, "ref", 0, mult, div, acc); + eq5c_clk_data->hws[pll->index] = hw; + if (IS_ERR(hw)) { + pr_err("failed registering %s: %ld\n", + pll->name, PTR_ERR(hw)); + } + } + + ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, eq5c_clk_data); + if (ret) { + pr_err("failed registering clk provider: %d\n", ret); + goto err; + } + + return; + +err: + kfree(eq5c_clk_data); + /* Signal to platform driver probe that we failed init. */ + eq5c_clk_data = ERR_PTR(ret); +} + +CLK_OF_DECLARE_DRIVER(eq5c, "mobileye,eyeq5-clk", eq5c_init); -- 2.43.2