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85b2181c28
Remove an unneeded __init annotation from the declaration of function mtk_clk_register_ref2usb_tx(): this avoids section mismatch warnings during modpost phase when called from functions that have no such annotation (useful when clocks are platform drivers). Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Miles Chen <miles.chen@mediatek.com> Link: https://lore.kernel.org/r/20220921091455.41327-6-angelogioacchino.delregno@collabora.com Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
103 lines
2.1 KiB
C
103 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2015 MediaTek Inc.
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* Author: James Liao <jamesjj.liao@mediatek.com>
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*/
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/slab.h>
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#include "clk-mtk.h"
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#define REF2USB_TX_EN BIT(0)
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#define REF2USB_TX_LPF_EN BIT(1)
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#define REF2USB_TX_OUT_EN BIT(2)
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#define REF2USB_EN_MASK (REF2USB_TX_EN | REF2USB_TX_LPF_EN | \
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REF2USB_TX_OUT_EN)
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struct mtk_ref2usb_tx {
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struct clk_hw hw;
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void __iomem *base_addr;
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};
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static inline struct mtk_ref2usb_tx *to_mtk_ref2usb_tx(struct clk_hw *hw)
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{
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return container_of(hw, struct mtk_ref2usb_tx, hw);
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}
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static int mtk_ref2usb_tx_is_prepared(struct clk_hw *hw)
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{
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struct mtk_ref2usb_tx *tx = to_mtk_ref2usb_tx(hw);
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return (readl(tx->base_addr) & REF2USB_EN_MASK) == REF2USB_EN_MASK;
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}
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static int mtk_ref2usb_tx_prepare(struct clk_hw *hw)
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{
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struct mtk_ref2usb_tx *tx = to_mtk_ref2usb_tx(hw);
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u32 val;
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val = readl(tx->base_addr);
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val |= REF2USB_TX_EN;
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writel(val, tx->base_addr);
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udelay(100);
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val |= REF2USB_TX_LPF_EN;
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writel(val, tx->base_addr);
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val |= REF2USB_TX_OUT_EN;
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writel(val, tx->base_addr);
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return 0;
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}
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static void mtk_ref2usb_tx_unprepare(struct clk_hw *hw)
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{
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struct mtk_ref2usb_tx *tx = to_mtk_ref2usb_tx(hw);
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u32 val;
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val = readl(tx->base_addr);
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val &= ~REF2USB_EN_MASK;
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writel(val, tx->base_addr);
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}
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static const struct clk_ops mtk_ref2usb_tx_ops = {
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.is_prepared = mtk_ref2usb_tx_is_prepared,
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.prepare = mtk_ref2usb_tx_prepare,
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.unprepare = mtk_ref2usb_tx_unprepare,
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};
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struct clk_hw *mtk_clk_register_ref2usb_tx(const char *name,
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const char *parent_name, void __iomem *reg)
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{
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struct mtk_ref2usb_tx *tx;
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struct clk_init_data init = {};
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int ret;
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tx = kzalloc(sizeof(*tx), GFP_KERNEL);
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if (!tx)
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return ERR_PTR(-ENOMEM);
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tx->base_addr = reg;
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tx->hw.init = &init;
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init.name = name;
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init.ops = &mtk_ref2usb_tx_ops;
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init.parent_names = &parent_name;
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init.num_parents = 1;
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ret = clk_hw_register(NULL, &tx->hw);
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if (ret) {
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kfree(tx);
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return ERR_PTR(ret);
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}
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return &tx->hw;
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}
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MODULE_LICENSE("GPL");
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