From patchwork Fri Dec 22 02:45:18 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Stanley X-Patchwork-Id: 10128699 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 262756038F for ; Fri, 22 Dec 2017 02:45:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1685E2916D for ; Fri, 22 Dec 2017 02:45:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0B376291BC; Fri, 22 Dec 2017 02:45:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0657E2916D for ; Fri, 22 Dec 2017 02:45:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754859AbdLVCpw (ORCPT ); Thu, 21 Dec 2017 21:45:52 -0500 Received: from mail-pf0-f195.google.com ([209.85.192.195]:46590 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755891AbdLVCps (ORCPT ); Thu, 21 Dec 2017 21:45:48 -0500 Received: by mail-pf0-f195.google.com with SMTP id c204so14759920pfc.13; Thu, 21 Dec 2017 18:45:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=ikq1O6sKIQWceAZ3BytSz0CjURSvlBviz43X3na9U/k=; b=Wa9hb74SJV/6VXjnlgkkuRXo62LeqFA/DNRZLkosXtGU9uiea0yDZj6IwZay/40nEf XCM6DnyeikB14uQaH6Zt7jCLLquoVtvL19YGDyEUa78QKDFpdwJ/fzDKG6q5F02Q/Q7K DW8wfknH1wEMAv47m3wKIBUK5mo1n0YEMIuZUtvHA7EmIO5iXwZ3iofSzCCwrKhhgOEV P9g+T5N72BdXTgx2D2cbjzI0ZyKigGrVZrq4WE+uRBa5rYUe/RFz6okhsFjTDO6alcHh vxpUVNN0Bnu67X5rGLxFXfW7kYISjrWbdd7tcv+XMEbjN3thwNnSlFcPXM7IP3R8TSl0 ukaw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=ikq1O6sKIQWceAZ3BytSz0CjURSvlBviz43X3na9U/k=; b=ophPVAT6QdCAIfo6mOyXRf+jXeyfq1ZOjwMMMK0pjbrwhtd9paSTFMw9o1PXik+JWG bYvgbYHvJgjHxcWxPZPeN0NusewHZ7e/LRApL3spx8b+8my0vBTu6ojo/lQnQRA2csFD AUK7SDfklA0dJMnGQ03BuUS0DJ+UcjrZPVZATP4sFhkFt/TGD4s+zuF2xi8tytNrSN9/ LUy57DwR4MLGsywcpygwMBvArr1WsoebISk9+/8ryrRDJPY5TGyR9OivuzEIzIcu4SmP I2ueEoFbPOcetRCdTmvZa20GOso0lyblTzCeAg404Lc3kvknVuU+a2DkD2bTMXCJA3Oy HJig== X-Gm-Message-State: AKGB3mLMO3xLMX49AgTrtjTMo3OUIB7YWQelQyB4oAZHiQLP48yqTNNs 5asookww8Q3x8hHwhTOx1Kg= X-Google-Smtp-Source: ACJfBouZv/qKfv+HxD/S38fwclYmpvp8cT9rhyONwCOKw8xjL239RcPP0u/FEop3RfOGrCU4OhRdkw== X-Received: by 10.99.125.27 with SMTP id y27mr9063646pgc.233.1513910747581; Thu, 21 Dec 2017 18:45:47 -0800 (PST) Received: from aurora.jms.id.au ([203.0.153.9]) by smtp.gmail.com with ESMTPSA id u67sm42107501pfd.162.2017.12.21.18.45.41 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 21 Dec 2017 18:45:46 -0800 (PST) Received: by aurora.jms.id.au (sSMTP sendmail emulation); Fri, 22 Dec 2017 13:15:38 +1030 From: Joel Stanley To: Lee Jones , Michael Turquette , Stephen Boyd Cc: linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Andrew Jeffery , Benjamin Herrenschmidt , Jeremy Kerr , Rick Altherr , Ryan Chen , Arnd Bergmann Subject: [PATCH v7 1/5] clk: Add clock driver for ASPEED BMC SoCs Date: Fri, 22 Dec 2017 13:15:18 +1030 Message-Id: <20171222024522.10362-2-joel@jms.id.au> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20171222024522.10362-1-joel@jms.id.au> References: <20171222024522.10362-1-joel@jms.id.au> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This adds the stub of a driver for the ASPEED SoCs. The clocks are defined and the static registration is set up. Reviewed-by: Andrew Jeffery Signed-off-by: Joel Stanley Reviewed-by: Benjamin Herrenschmidt --- v7: - Rebase on dt-bindings patch - Add ASPEED_NUM_CLKS as it no longer lives in the header v6: - Add SPDX copyright notices v5: - Add Andrew's reviewed-by - Make aspeed_gates not initconst to avoid section mismatch warning v3: - use named initlisers for aspeed_gates table - fix clocks typo - Move ASPEED_NUM_CLKS to the bottom of the list - Put gates at the start of the list, so we can use them to initalise the aspeed_gates table - Add ASPEED_CLK_SELECTION_2 - Set parent of network MAC gates --- drivers/clk/Kconfig | 12 ++++ drivers/clk/Makefile | 1 + drivers/clk/clk-aspeed.c | 141 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 154 insertions(+) create mode 100644 drivers/clk/clk-aspeed.c diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 1c4e1aa6767e..9abe063ef8d2 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -142,6 +142,18 @@ config COMMON_CLK_GEMINI This driver supports the SoC clocks on the Cortina Systems Gemini platform, also known as SL3516 or CS3516. +config COMMON_CLK_ASPEED + bool "Clock driver for Aspeed BMC SoCs" + depends on ARCH_ASPEED || COMPILE_TEST + default ARCH_ASPEED + select MFD_SYSCON + select RESET_CONTROLLER + ---help--- + This driver supports the SoC clocks on the Aspeed BMC platforms. + + The G4 and G5 series, including the ast2400 and ast2500, are supported + by this driver. + config COMMON_CLK_S2MPS11 tristate "Clock driver for S2MPS1X/S5M8767 MFD" depends on MFD_SEC_CORE || COMPILE_TEST diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index f7f761b02bed..d260da4809f8 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_ARCH_CLPS711X) += clk-clps711x.o obj-$(CONFIG_COMMON_CLK_CS2000_CP) += clk-cs2000-cp.o obj-$(CONFIG_ARCH_EFM32) += clk-efm32gg.o obj-$(CONFIG_COMMON_CLK_GEMINI) += clk-gemini.o +obj-$(CONFIG_COMMON_CLK_ASPEED) += clk-aspeed.o obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o obj-$(CONFIG_CLK_HSDK) += clk-hsdk-pll.o obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o diff --git a/drivers/clk/clk-aspeed.c b/drivers/clk/clk-aspeed.c new file mode 100644 index 000000000000..7a86ee08ea4f --- /dev/null +++ b/drivers/clk/clk-aspeed.c @@ -0,0 +1,141 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#define pr_fmt(fmt) "clk-aspeed: " fmt + +#include +#include +#include +#include +#include +#include + +#include + +#define ASPEED_NUM_CLKS 35 + +#define ASPEED_STRAP 0x70 + +/* Keeps track of all clocks */ +static struct clk_hw_onecell_data *aspeed_clk_data; + +static void __iomem *scu_base; + +/** + * struct aspeed_gate_data - Aspeed gated clocks + * @clock_idx: bit used to gate this clock in the clock register + * @reset_idx: bit used to reset this IP in the reset register. -1 if no + * reset is required when enabling the clock + * @name: the clock name + * @parent_name: the name of the parent clock + * @flags: standard clock framework flags + */ +struct aspeed_gate_data { + u8 clock_idx; + s8 reset_idx; + const char *name; + const char *parent_name; + unsigned long flags; +}; + +/** + * struct aspeed_clk_gate - Aspeed specific clk_gate structure + * @hw: handle between common and hardware-specific interfaces + * @reg: register controlling gate + * @clock_idx: bit used to gate this clock in the clock register + * @reset_idx: bit used to reset this IP in the reset register. -1 if no + * reset is required when enabling the clock + * @flags: hardware-specific flags + * @lock: register lock + * + * Some of the clocks in the Aspeed SoC must be put in reset before enabling. + * This modified version of clk_gate allows an optional reset bit to be + * specified. + */ +struct aspeed_clk_gate { + struct clk_hw hw; + struct regmap *map; + u8 clock_idx; + s8 reset_idx; + u8 flags; + spinlock_t *lock; +}; + +#define to_aspeed_clk_gate(_hw) container_of(_hw, struct aspeed_clk_gate, hw) + +/* TODO: ask Aspeed about the actual parent data */ +static const struct aspeed_gate_data aspeed_gates[] = { + /* clk rst name parent flags */ + [ASPEED_CLK_GATE_ECLK] = { 0, -1, "eclk-gate", "eclk", 0 }, /* Video Engine */ + [ASPEED_CLK_GATE_GCLK] = { 1, 7, "gclk-gate", NULL, 0 }, /* 2D engine */ + [ASPEED_CLK_GATE_MCLK] = { 2, -1, "mclk-gate", "mpll", CLK_IS_CRITICAL }, /* SDRAM */ + [ASPEED_CLK_GATE_VCLK] = { 3, 6, "vclk-gate", NULL, 0 }, /* Video Capture */ + [ASPEED_CLK_GATE_BCLK] = { 4, 10, "bclk-gate", "bclk", 0 }, /* PCIe/PCI */ + [ASPEED_CLK_GATE_DCLK] = { 5, -1, "dclk-gate", NULL, 0 }, /* DAC */ + [ASPEED_CLK_GATE_REFCLK] = { 6, -1, "refclk-gate", "clkin", CLK_IS_CRITICAL }, + [ASPEED_CLK_GATE_USBPORT2CLK] = { 7, 3, "usb-port2-gate", NULL, 0 }, /* USB2.0 Host port 2 */ + [ASPEED_CLK_GATE_LCLK] = { 8, 5, "lclk-gate", NULL, 0 }, /* LPC */ + [ASPEED_CLK_GATE_USBUHCICLK] = { 9, 15, "usb-uhci-gate", NULL, 0 }, /* USB1.1 (requires port 2 enabled) */ + [ASPEED_CLK_GATE_D1CLK] = { 10, 13, "d1clk-gate", NULL, 0 }, /* GFX CRT */ + [ASPEED_CLK_GATE_YCLK] = { 13, 4, "yclk-gate", NULL, 0 }, /* HAC */ + [ASPEED_CLK_GATE_USBPORT1CLK] = { 14, 14, "usb-port1-gate", NULL, 0 }, /* USB2 hub/USB2 host port 1/USB1.1 dev */ + [ASPEED_CLK_GATE_UART1CLK] = { 15, -1, "uart1clk-gate", "uart", 0 }, /* UART1 */ + [ASPEED_CLK_GATE_UART2CLK] = { 16, -1, "uart2clk-gate", "uart", 0 }, /* UART2 */ + [ASPEED_CLK_GATE_UART5CLK] = { 17, -1, "uart5clk-gate", "uart", 0 }, /* UART5 */ + [ASPEED_CLK_GATE_ESPICLK] = { 19, -1, "espiclk-gate", NULL, 0 }, /* eSPI */ + [ASPEED_CLK_GATE_MAC1CLK] = { 20, 11, "mac1clk-gate", "mac", 0 }, /* MAC1 */ + [ASPEED_CLK_GATE_MAC2CLK] = { 21, 12, "mac2clk-gate", "mac", 0 }, /* MAC2 */ + [ASPEED_CLK_GATE_RSACLK] = { 24, -1, "rsaclk-gate", NULL, 0 }, /* RSA */ + [ASPEED_CLK_GATE_UART3CLK] = { 25, -1, "uart3clk-gate", "uart", 0 }, /* UART3 */ + [ASPEED_CLK_GATE_UART4CLK] = { 26, -1, "uart4clk-gate", "uart", 0 }, /* UART4 */ + [ASPEED_CLK_GATE_SDCLKCLK] = { 27, 16, "sdclk-gate", NULL, 0 }, /* SDIO/SD */ + [ASPEED_CLK_GATE_LHCCLK] = { 28, -1, "lhclk-gate", "lhclk", 0 }, /* LPC master/LPC+ */ +}; + +static void __init aspeed_cc_init(struct device_node *np) +{ + struct regmap *map; + u32 val; + int ret; + int i; + + scu_base = of_iomap(np, 0); + if (IS_ERR(scu_base)) + return; + + aspeed_clk_data = kzalloc(sizeof(*aspeed_clk_data) + + sizeof(*aspeed_clk_data->hws) * ASPEED_NUM_CLKS, + GFP_KERNEL); + if (!aspeed_clk_data) + return; + + /* + * This way all clocks fetched before the platform device probes, + * except those we assign here for early use, will be deferred. + */ + for (i = 0; i < ASPEED_NUM_CLKS; i++) + aspeed_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER); + + map = syscon_node_to_regmap(np); + if (IS_ERR(map)) { + pr_err("no syscon regmap\n"); + return; + } + /* + * We check that the regmap works on this very first access, + * but as this is an MMIO-backed regmap, subsequent regmap + * access is not going to fail and we skip error checks from + * this point. + */ + ret = regmap_read(map, ASPEED_STRAP, &val); + if (ret) { + pr_err("failed to read strapping register\n"); + return; + } + + aspeed_clk_data->num = ASPEED_NUM_CLKS; + ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, aspeed_clk_data); + if (ret) + pr_err("failed to add DT provider: %d\n", ret); +}; +CLK_OF_DECLARE_DRIVER(aspeed_cc_g5, "aspeed,ast2500-scu", aspeed_cc_init); +CLK_OF_DECLARE_DRIVER(aspeed_cc_g4, "aspeed,ast2400-scu", aspeed_cc_init);