diff options
Diffstat (limited to 'drivers/clk/mediatek/clk-mt8195-apusys_pll.c')
| -rw-r--r-- | drivers/clk/mediatek/clk-mt8195-apusys_pll.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/drivers/clk/mediatek/clk-mt8195-apusys_pll.c b/drivers/clk/mediatek/clk-mt8195-apusys_pll.c new file mode 100644 index 0000000000..79762bc85c --- /dev/null +++ b/drivers/clk/mediatek/clk-mt8195-apusys_pll.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Copyright (c) 2021 MediaTek Inc. +// Author: Chun-Jie Chen <chun-jie.chen@mediatek.com> + +#include "clk-mtk.h" +#include "clk-pll.h" + +#include <dt-bindings/clock/mt8195-clk.h> +#include <linux/clk-provider.h> +#include <linux/platform_device.h> + +#define MT8195_PLL_FMAX (3800UL * MHZ) +#define MT8195_PLL_FMIN (1500UL * MHZ) +#define MT8195_INTEGER_BITS (8) +#define MT8195_PCW_BITS (22) +#define MT8195_POSDIV_SHIFT (24) +#define MT8195_PLL_EN_BIT (0) +#define MT8195_PCW_SHIFT (0) + +/* + * The "en_reg" and "pcw_chg_reg" fields are standard offset register compared + * with "reg" field, so set zero to imply it. + * No tuner control in apu pll, so set "tuner_XXX" as zero to imply it. + * No rst or post divider enable in apu pll, so set "rst_bar_mask" and "en_mask" + * as zero to imply it. + */ +#define PLL(_id, _name, _reg, _pwr_reg, _pd_reg, _pcw_reg) { \ + .id = _id, \ + .name = _name, \ + .reg = _reg, \ + .pwr_reg = _pwr_reg, \ + .en_mask = 0, \ + .flags = 0, \ + .rst_bar_mask = 0, \ + .fmax = MT8195_PLL_FMAX, \ + .fmin = MT8195_PLL_FMIN, \ + .pcwbits = MT8195_PCW_BITS, \ + .pcwibits = MT8195_INTEGER_BITS, \ + .pd_reg = _pd_reg, \ + .pd_shift = MT8195_POSDIV_SHIFT, \ + .tuner_reg = 0, \ + .tuner_en_reg = 0, \ + .tuner_en_bit = 0, \ + .pcw_reg = _pcw_reg, \ + .pcw_shift = MT8195_PCW_SHIFT, \ + .pcw_chg_reg = 0, \ + .en_reg = 0, \ + .pll_en_bit = MT8195_PLL_EN_BIT, \ + } + +static const struct mtk_pll_data apusys_plls[] = { + PLL(CLK_APUSYS_PLL_APUPLL, "apusys_pll_apupll", 0x008, 0x014, 0x00c, 0x00c), + PLL(CLK_APUSYS_PLL_NPUPLL, "apusys_pll_npupll", 0x018, 0x024, 0x01c, 0x01c), + PLL(CLK_APUSYS_PLL_APUPLL1, "apusys_pll_apupll1", 0x028, 0x034, 0x02c, 0x02c), + PLL(CLK_APUSYS_PLL_APUPLL2, "apusys_pll_apupll2", 0x038, 0x044, 0x03c, 0x03c), +}; + +static int clk_mt8195_apusys_pll_probe(struct platform_device *pdev) +{ + struct clk_hw_onecell_data *clk_data; + struct device_node *node = pdev->dev.of_node; + int r; + + clk_data = mtk_alloc_clk_data(CLK_APUSYS_PLL_NR_CLK); + if (!clk_data) + return -ENOMEM; + + r = mtk_clk_register_plls(node, apusys_plls, ARRAY_SIZE(apusys_plls), clk_data); + if (r) + goto free_apusys_pll_data; + + r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data); + if (r) + goto unregister_plls; + + platform_set_drvdata(pdev, clk_data); + + return r; + +unregister_plls: + mtk_clk_unregister_plls(apusys_plls, ARRAY_SIZE(apusys_plls), clk_data); +free_apusys_pll_data: + mtk_free_clk_data(clk_data); + return r; +} + +static void clk_mt8195_apusys_pll_remove(struct platform_device *pdev) +{ + struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev); + struct device_node *node = pdev->dev.of_node; + + of_clk_del_provider(node); + mtk_clk_unregister_plls(apusys_plls, ARRAY_SIZE(apusys_plls), clk_data); + mtk_free_clk_data(clk_data); +} + +static const struct of_device_id of_match_clk_mt8195_apusys_pll[] = { + { .compatible = "mediatek,mt8195-apusys_pll", }, + {} +}; +MODULE_DEVICE_TABLE(of, of_match_clk_mt8195_apusys_pll); + +static struct platform_driver clk_mt8195_apusys_pll_drv = { + .probe = clk_mt8195_apusys_pll_probe, + .remove_new = clk_mt8195_apusys_pll_remove, + .driver = { + .name = "clk-mt8195-apusys_pll", + .of_match_table = of_match_clk_mt8195_apusys_pll, + }, +}; +module_platform_driver(clk_mt8195_apusys_pll_drv); +MODULE_LICENSE("GPL"); |