From patchwork Tue Aug 4 08:16:57 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Liao X-Patchwork-Id: 6935011 Return-Path: X-Original-To: patchwork-linux-mediatek@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E62F4C05AC for ; Tue, 4 Aug 2015 08:20:49 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BC29120445 for ; Tue, 4 Aug 2015 08:20:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 975B120634 for ; Tue, 4 Aug 2015 08:20:47 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZMXSo-0006lZ-RK; Tue, 04 Aug 2015 08:20:46 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZMXQ8-0003Hw-Lg; Tue, 04 Aug 2015 08:18:06 +0000 X-Listener-Flag: 11101 Received: from mtkhts09.mediatek.inc [(172.21.101.70)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 766517873; Tue, 04 Aug 2015 16:17:36 +0800 Received: from mtksdtcf04.mediatek.inc (10.21.12.144) by mtkhts09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.181.6; Tue, 4 Aug 2015 16:17:35 +0800 From: James Liao To: Matthias Brugger , Mike Turquette , Stephen Boyd , Heiko Stubner Subject: [PATCH v6 8/9] clk: mediatek: Add USB clock support in MT8173 APMIXEDSYS Date: Tue, 4 Aug 2015 16:16:57 +0800 Message-ID: <1438676218-11310-9-git-send-email-jamesjj.liao@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1438676218-11310-1-git-send-email-jamesjj.liao@mediatek.com> References: <1438676218-11310-1-git-send-email-jamesjj.liao@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150804_011801_350686_9F41D588 X-CRM114-Status: GOOD ( 23.87 ) X-Spam-Score: -1.1 (-) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, srv_heupstream@mediatek.com, James Liao , linux-kernel@vger.kernel.org, Ricky Liang , Rob Herring , linux-mediatek@lists.infradead.org, Sascha Hauer , linux-arm-kernel@lists.infradead.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add REF2USB_TX clock support into MT8173 APMIXEDSYS. This clock is needed by USB 3.0. Signed-off-by: James Liao --- drivers/clk/mediatek/Makefile | 2 +- drivers/clk/mediatek/clk-apmixed.c | 107 +++++++++++++++++++++++++++++++++ drivers/clk/mediatek/clk-mt8173.c | 47 +++++++++++++++ drivers/clk/mediatek/clk-mtk.h | 3 + drivers/clk/mediatek/clk-pll.c | 7 +-- include/dt-bindings/clock/mt8173-clk.h | 3 +- 6 files changed, 161 insertions(+), 8 deletions(-) create mode 100644 drivers/clk/mediatek/clk-apmixed.c diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile index 8e4b2a4..95fdfac 100644 --- a/drivers/clk/mediatek/Makefile +++ b/drivers/clk/mediatek/Makefile @@ -1,4 +1,4 @@ -obj-y += clk-mtk.o clk-pll.o clk-gate.o +obj-y += clk-mtk.o clk-pll.o clk-gate.o clk-apmixed.o obj-$(CONFIG_RESET_CONTROLLER) += reset.o obj-y += clk-mt8135.o obj-y += clk-mt8173.o diff --git a/drivers/clk/mediatek/clk-apmixed.c b/drivers/clk/mediatek/clk-apmixed.c new file mode 100644 index 0000000..5303c59 --- /dev/null +++ b/drivers/clk/mediatek/clk-apmixed.c @@ -0,0 +1,107 @@ +/* + * Copyright (c) 2015 MediaTek Inc. + * Author: James Liao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include + +#include "clk-mtk.h" + +#define REF2USB_TX_EN BIT(0) +#define REF2USB_TX_LPF_EN BIT(1) +#define REF2USB_TX_OUT_EN BIT(2) +#define REF2USB_EN_MASK (REF2USB_TX_EN | REF2USB_TX_LPF_EN | \ + REF2USB_TX_OUT_EN) + +struct mtk_ref2usb_tx { + struct clk_hw hw; + void __iomem *base_addr; +}; + +static inline struct mtk_ref2usb_tx *to_mtk_ref2usb_tx(struct clk_hw *hw) +{ + return container_of(hw, struct mtk_ref2usb_tx, hw); +} + +static int mtk_ref2usb_tx_is_prepared(struct clk_hw *hw) +{ + struct mtk_ref2usb_tx *tx = to_mtk_ref2usb_tx(hw); + + return (readl(tx->base_addr) & REF2USB_EN_MASK) == REF2USB_EN_MASK; +} + +static int mtk_ref2usb_tx_prepare(struct clk_hw *hw) +{ + struct mtk_ref2usb_tx *tx = to_mtk_ref2usb_tx(hw); + u32 val; + + val = readl(tx->base_addr); + + val |= REF2USB_TX_EN; + writel(val, tx->base_addr); + udelay(100); + + val |= REF2USB_TX_LPF_EN; + writel(val, tx->base_addr); + + val |= REF2USB_TX_OUT_EN; + writel(val, tx->base_addr); + + return 0; +} + +static void mtk_ref2usb_tx_unprepare(struct clk_hw *hw) +{ + struct mtk_ref2usb_tx *tx = to_mtk_ref2usb_tx(hw); + u32 val; + + val = readl(tx->base_addr); + val &= ~REF2USB_EN_MASK; + writel(val, tx->base_addr); +} + +static const struct clk_ops mtk_ref2usb_tx_ops = { + .is_prepared = mtk_ref2usb_tx_is_prepared, + .prepare = mtk_ref2usb_tx_prepare, + .unprepare = mtk_ref2usb_tx_unprepare, +}; + +struct clk * __init mtk_clk_register_ref2usb_tx(const char *name, + const char *parent_name, void __iomem *reg) +{ + struct mtk_ref2usb_tx *tx; + struct clk_init_data init = {}; + struct clk *clk; + + tx = kzalloc(sizeof(*tx), GFP_KERNEL); + if (!tx) + return ERR_PTR(-ENOMEM); + + tx->base_addr = reg; + tx->hw.init = &init; + + init.name = name; + init.ops = &mtk_ref2usb_tx_ops; + init.parent_names = &parent_name; + init.num_parents = 1; + + clk = clk_register(NULL, &tx->hw); + + if (IS_ERR(clk)) { + pr_err("Failed to register clk %s: %ld\n", name, PTR_ERR(clk)); + kfree(tx); + } + + return clk; +} diff --git a/drivers/clk/mediatek/clk-mt8173.c b/drivers/clk/mediatek/clk-mt8173.c index 05335e5..63662d0 100644 --- a/drivers/clk/mediatek/clk-mt8173.c +++ b/drivers/clk/mediatek/clk-mt8173.c @@ -969,6 +969,24 @@ static void __init mtk_pericfg_init(struct device_node *node) } CLK_OF_DECLARE(mtk_pericfg, "mediatek,mt8173-pericfg", mtk_pericfg_init); +struct mtk_clk_usb { + int id; + const char *name; + const char *parent; + u32 reg_ofs; +}; + +#define APMIXED_USB(_id, _name, _parent, _reg_ofs) { \ + .id = _id, \ + .name = _name, \ + .parent = _parent, \ + .reg_ofs = _reg_ofs, \ + } + +static const struct mtk_clk_usb apmixed_usb[] __initconst = { + APMIXED_USB(CLK_APMIXED_REF2USB_TX, "ref2usb_tx", "clk26m", 0x8), +}; + #define MT8173_PLL_FMAX (3000UL * MHZ) #define CON0_MT8173_RST_BAR BIT(24) @@ -1011,6 +1029,15 @@ static const struct mtk_pll_data plls[] = { static void __init mtk_apmixedsys_init(struct device_node *node) { struct clk_onecell_data *clk_data; + void __iomem *base; + struct clk *clk; + int r, i; + + base = of_iomap(node, 0); + if (!base) { + pr_err("%s(): ioremap failed\n", __func__); + return; + } mt8173_pll_clk_data = clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK); if (!clk_data) @@ -1018,6 +1045,26 @@ static void __init mtk_apmixedsys_init(struct device_node *node) mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls), clk_data); + for (i = 0; i < ARRAY_SIZE(apmixed_usb); i++) { + const struct mtk_clk_usb *cku = &apmixed_usb[i]; + + clk = mtk_clk_register_ref2usb_tx(cku->name, cku->parent, + base + cku->reg_ofs); + + if (IS_ERR(clk)) { + pr_err("Failed to register clk %s: %ld\n", cku->name, + PTR_ERR(clk)); + continue; + } + + clk_data->clks[cku->id] = clk; + } + + r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); + if (r) + pr_err("%s(): could not register clock provider: %d\n", + __func__, r); + mtk_clk_enable_critical(); } CLK_OF_DECLARE(mtk_apmixedsys, "mediatek,mt8173-apmixedsys", diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h index 32d4f55..cf19363 100644 --- a/drivers/clk/mediatek/clk-mtk.h +++ b/drivers/clk/mediatek/clk-mtk.h @@ -173,6 +173,9 @@ void mtk_clk_register_plls(struct device_node *node, const struct mtk_pll_data *plls, int num_plls, struct clk_onecell_data *clk_data); +struct clk *mtk_clk_register_ref2usb_tx(const char *name, + const char *parent_name, void __iomem *reg); + #ifdef CONFIG_RESET_CONTROLLER void mtk_register_reset_controller(struct device_node *np, unsigned int num_regs, int regofs); diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c index 44409e9..813f0c7 100644 --- a/drivers/clk/mediatek/clk-pll.c +++ b/drivers/clk/mediatek/clk-pll.c @@ -302,7 +302,7 @@ void __init mtk_clk_register_plls(struct device_node *node, const struct mtk_pll_data *plls, int num_plls, struct clk_onecell_data *clk_data) { void __iomem *base; - int r, i; + int i; struct clk *clk; base = of_iomap(node, 0); @@ -324,9 +324,4 @@ void __init mtk_clk_register_plls(struct device_node *node, clk_data->clks[pll->id] = clk; } - - r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); - if (r) - pr_err("%s(): could not register clock provider: %d\n", - __func__, r); } diff --git a/include/dt-bindings/clock/mt8173-clk.h b/include/dt-bindings/clock/mt8173-clk.h index 87820ee..e3db63a 100644 --- a/include/dt-bindings/clock/mt8173-clk.h +++ b/include/dt-bindings/clock/mt8173-clk.h @@ -175,7 +175,8 @@ #define CLK_APMIXED_APLL2 12 #define CLK_APMIXED_LVDSPLL 13 #define CLK_APMIXED_MSDCPLL2 14 -#define CLK_APMIXED_NR_CLK 15 +#define CLK_APMIXED_REF2USB_TX 15 +#define CLK_APMIXED_NR_CLK 16 /* INFRA_SYS */