Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753917AbbF3C7c (ORCPT ); Mon, 29 Jun 2015 22:59:32 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:41632 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753878AbbF3C7U (ORCPT ); Mon, 29 Jun 2015 22:59:20 -0400 X-Listener-Flag: 11101 From: James Liao To: Matthias Brugger , Mike Turquette , Stephen Boyd CC: , Daniel Kurtz , Ricky Liang , Rob Herring , Sascha Hauer , , , , , James Liao Subject: [PATCH v2 4/4] clk: mediatek: Add USB clock support in MT8173 APMIXEDSYS Date: Tue, 30 Jun 2015 10:58:47 +0800 Message-ID: <1435633127-31952-5-git-send-email-jamesjj.liao@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1435633127-31952-1-git-send-email-jamesjj.liao@mediatek.com> References: <1435633127-31952-1-git-send-email-jamesjj.liao@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6050 Lines: 229 Add REF2USB_TX clock support into MT8173 APMIXEDSYS. This clock is needed by USB 3.0. Signed-off-by: James Liao --- drivers/clk/mediatek/clk-mt8173.c | 143 +++++++++++++++++++++++++++++++++ drivers/clk/mediatek/clk-pll.c | 7 +- include/dt-bindings/clock/mt8173-clk.h | 3 +- 3 files changed, 146 insertions(+), 7 deletions(-) diff --git a/drivers/clk/mediatek/clk-mt8173.c b/drivers/clk/mediatek/clk-mt8173.c index 75be757..333b6af 100644 --- a/drivers/clk/mediatek/clk-mt8173.c +++ b/drivers/clk/mediatek/clk-mt8173.c @@ -12,6 +12,7 @@ * GNU General Public License for more details. */ +#include #include #include #include @@ -968,6 +969,141 @@ static void __init mtk_pericfg_init(struct device_node *node) } CLK_OF_DECLARE(mtk_pericfg, "mediatek,mt8173-pericfg", mtk_pericfg_init); +#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, +}; + +static struct clk *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; +} + +struct mtk_apmixed_ex { + int id; + const char *name; + const char *parent; + u32 reg_ofs; +}; + +#define APMIXED_EX(_id, _name, _parent, _reg_ofs) { \ + .id = _id, \ + .name = _name, \ + .parent = _parent, \ + .reg_ofs = _reg_ofs, \ + } + +static const struct mtk_apmixed_ex apmixed_ex[] = { + APMIXED_EX(CLK_APMIXED_REF2USB_TX, "ref2usb_tx", "clk26m", 0x8), +}; + +static void __init mtk_clk_register_apmixedsys_special(struct device_node *node, + struct clk_onecell_data *clk_data) +{ + void __iomem *base; + struct clk *clk; + int i; + + base = of_iomap(node, 0); + if (!base) { + pr_err("%s(): ioremap failed\n", __func__); + return; + } + + for (i = 0; i < ARRAY_SIZE(apmixed_ex); i++) { + const struct mtk_apmixed_ex *ape = &apmixed_ex[i]; + + clk = mtk_clk_register_ref2usb_tx(ape->name, ape->parent, + base + ape->reg_ofs); + + if (IS_ERR(clk)) { + pr_err("Failed to register clk %s: %ld\n", ape->name, + PTR_ERR(clk)); + continue; + } + + clk_data->clks[CLK_APMIXED_REF2USB_TX] = clk; + } +} + #define MT8173_PLL_FMAX (3000UL * MHZ) #define CON0_MT8173_RST_BAR BIT(24) @@ -1010,12 +1146,19 @@ static const struct mtk_pll_data plls[] = { static void __init mtk_apmixedsys_init(struct device_node *node) { struct clk_onecell_data *clk_data; + int r; mt8173_pll_clk_data = clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK); if (!clk_data) return; mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls), clk_data); + mtk_clk_register_apmixedsys_special(node, clk_data); + + 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(); } 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 6ce88bf..7b7c555 100644 --- a/include/dt-bindings/clock/mt8173-clk.h +++ b/include/dt-bindings/clock/mt8173-clk.h @@ -172,7 +172,8 @@ #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 */ -- 1.8.1.1.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/