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a65615df5b
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is (mostly) ignored and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Trivially convert all mediatek clk drivers from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20230430190233.878921-4-u.kleine-koenig@pengutronix.de Signed-off-by: Stephen Boyd <sboyd@kernel.org>
103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2014 MediaTek Inc.
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* James Liao <jamesjj.liao@mediatek.com>
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* Copyright (c) 2023 Collabora, Ltd.
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* AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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*/
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#include <dt-bindings/clock/mt8135-clk.h>
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#include <linux/clk.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include "clk-mtk.h"
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#include "clk-pll.h"
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#define MT8135_PLL_FMAX (2000 * MHZ)
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#define CON0_MT8135_RST_BAR BIT(27)
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#define PLL(_id, _name, _reg, _pwr_reg, _en_mask, _flags, _pcwbits, _pd_reg, _pd_shift, _tuner_reg, _pcw_reg, _pcw_shift) { \
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.id = _id, \
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.name = _name, \
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.reg = _reg, \
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.pwr_reg = _pwr_reg, \
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.en_mask = _en_mask, \
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.flags = _flags, \
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.rst_bar_mask = CON0_MT8135_RST_BAR, \
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.fmax = MT8135_PLL_FMAX, \
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.pcwbits = _pcwbits, \
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.pd_reg = _pd_reg, \
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.pd_shift = _pd_shift, \
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.tuner_reg = _tuner_reg, \
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.pcw_reg = _pcw_reg, \
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.pcw_shift = _pcw_shift, \
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}
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static const struct mtk_pll_data plls[] = {
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PLL(CLK_APMIXED_ARMPLL1, "armpll1", 0x200, 0x218, 0x80000000, 0, 21, 0x204, 24, 0x0, 0x204, 0),
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PLL(CLK_APMIXED_ARMPLL2, "armpll2", 0x2cc, 0x2e4, 0x80000000, 0, 21, 0x2d0, 24, 0x0, 0x2d0, 0),
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PLL(CLK_APMIXED_MAINPLL, "mainpll", 0x21c, 0x234, 0xf0000000, HAVE_RST_BAR, 21, 0x21c, 6, 0x0, 0x220, 0),
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PLL(CLK_APMIXED_UNIVPLL, "univpll", 0x238, 0x250, 0xf3000000, HAVE_RST_BAR, 7, 0x238, 6, 0x0, 0x238, 9),
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PLL(CLK_APMIXED_MMPLL, "mmpll", 0x254, 0x26c, 0xf0000000, HAVE_RST_BAR, 21, 0x254, 6, 0x0, 0x258, 0),
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PLL(CLK_APMIXED_MSDCPLL, "msdcpll", 0x278, 0x290, 0x80000000, 0, 21, 0x278, 6, 0x0, 0x27c, 0),
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PLL(CLK_APMIXED_TVDPLL, "tvdpll", 0x294, 0x2ac, 0x80000000, 0, 31, 0x294, 6, 0x0, 0x298, 0),
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PLL(CLK_APMIXED_LVDSPLL, "lvdspll", 0x2b0, 0x2c8, 0x80000000, 0, 21, 0x2b0, 6, 0x0, 0x2b4, 0),
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PLL(CLK_APMIXED_AUDPLL, "audpll", 0x2e8, 0x300, 0x80000000, 0, 31, 0x2e8, 6, 0x2f8, 0x2ec, 0),
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PLL(CLK_APMIXED_VDECPLL, "vdecpll", 0x304, 0x31c, 0x80000000, 0, 21, 0x2b0, 6, 0x0, 0x308, 0),
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};
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static int clk_mt8135_apmixed_probe(struct platform_device *pdev)
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{
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struct clk_hw_onecell_data *clk_data;
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struct device_node *node = pdev->dev.of_node;
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int ret;
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clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK);
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if (!clk_data)
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return -ENOMEM;
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ret = mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls), clk_data);
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if (ret)
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return ret;
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ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
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if (ret)
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goto unregister_plls;
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return 0;
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unregister_plls:
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mtk_clk_unregister_plls(plls, ARRAY_SIZE(plls), clk_data);
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return ret;
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}
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static void clk_mt8135_apmixed_remove(struct platform_device *pdev)
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{
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struct device_node *node = pdev->dev.of_node;
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struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
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of_clk_del_provider(node);
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mtk_clk_unregister_plls(plls, ARRAY_SIZE(plls), clk_data);
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mtk_free_clk_data(clk_data);
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}
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static const struct of_device_id of_match_clk_mt8135_apmixed[] = {
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{ .compatible = "mediatek,mt8135-apmixedsys" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, of_match_clk_mt8135_apmixed);
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static struct platform_driver clk_mt8135_apmixed_drv = {
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.probe = clk_mt8135_apmixed_probe,
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.remove_new = clk_mt8135_apmixed_remove,
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.driver = {
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.name = "clk-mt8135-apmixed",
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.of_match_table = of_match_clk_mt8135_apmixed,
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},
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};
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module_platform_driver(clk_mt8135_apmixed_drv)
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MODULE_DESCRIPTION("MediaTek MT8135 apmixedsys clocks driver");
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MODULE_LICENSE("GPL");
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