diff options
Diffstat (limited to 'drivers/clk/mediatek/clk-mt6795-pericfg.c')
| -rw-r--r-- | drivers/clk/mediatek/clk-mt6795-pericfg.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/drivers/clk/mediatek/clk-mt6795-pericfg.c b/drivers/clk/mediatek/clk-mt6795-pericfg.c new file mode 100644 index 000000000..cb28d35da --- /dev/null +++ b/drivers/clk/mediatek/clk-mt6795-pericfg.c @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022 Collabora Ltd. + * Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> + */ + +#include <dt-bindings/clock/mediatek,mt6795-clk.h> +#include <dt-bindings/reset/mediatek,mt6795-resets.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include "clk-gate.h" +#include "clk-mtk.h" +#include "reset.h" + +#define GATE_PERI(_id, _name, _parent, _shift) \ + GATE_MTK(_id, _name, _parent, &peri_cg_regs, \ + _shift, &mtk_clk_gate_ops_setclr) + +static DEFINE_SPINLOCK(mt6795_peri_clk_lock); + +static const struct mtk_gate_regs peri_cg_regs = { + .set_ofs = 0x0008, + .clr_ofs = 0x0010, + .sta_ofs = 0x0018, +}; + +static const char * const uart_ck_sel_parents[] = { + "clk26m", + "uart_sel", +}; + +static const struct mtk_composite peri_clks[] = { + MUX(CLK_PERI_UART0_SEL, "uart0_ck_sel", uart_ck_sel_parents, 0x40c, 0, 1), + MUX(CLK_PERI_UART1_SEL, "uart1_ck_sel", uart_ck_sel_parents, 0x40c, 1, 1), + MUX(CLK_PERI_UART2_SEL, "uart2_ck_sel", uart_ck_sel_parents, 0x40c, 2, 1), + MUX(CLK_PERI_UART3_SEL, "uart3_ck_sel", uart_ck_sel_parents, 0x40c, 3, 1), +}; + +static const struct mtk_gate peri_gates[] = { + GATE_PERI(CLK_PERI_NFI, "peri_nfi", "axi_sel", 0), + GATE_PERI(CLK_PERI_THERM, "peri_therm", "axi_sel", 1), + GATE_PERI(CLK_PERI_PWM1, "peri_pwm1", "axi_sel", 2), + GATE_PERI(CLK_PERI_PWM2, "peri_pwm2", "axi_sel", 3), + GATE_PERI(CLK_PERI_PWM3, "peri_pwm3", "axi_sel", 4), + GATE_PERI(CLK_PERI_PWM4, "peri_pwm4", "axi_sel", 5), + GATE_PERI(CLK_PERI_PWM5, "peri_pwm5", "axi_sel", 6), + GATE_PERI(CLK_PERI_PWM6, "peri_pwm6", "axi_sel", 7), + GATE_PERI(CLK_PERI_PWM7, "peri_pwm7", "axi_sel", 8), + GATE_PERI(CLK_PERI_PWM, "peri_pwm", "axi_sel", 9), + GATE_PERI(CLK_PERI_USB0, "peri_usb0", "usb30_sel", 10), + GATE_PERI(CLK_PERI_USB1, "peri_usb1", "usb20_sel", 11), + GATE_PERI(CLK_PERI_AP_DMA, "peri_ap_dma", "axi_sel", 12), + GATE_PERI(CLK_PERI_MSDC30_0, "peri_msdc30_0", "msdc50_0_sel", 13), + GATE_PERI(CLK_PERI_MSDC30_1, "peri_msdc30_1", "msdc30_1_sel", 14), + GATE_PERI(CLK_PERI_MSDC30_2, "peri_msdc30_2", "msdc30_2_sel", 15), + GATE_PERI(CLK_PERI_MSDC30_3, "peri_msdc30_3", "msdc30_3_sel", 16), + GATE_PERI(CLK_PERI_NLI_ARB, "peri_nli_arb", "axi_sel", 17), + GATE_PERI(CLK_PERI_IRDA, "peri_irda", "irda_sel", 18), + GATE_PERI(CLK_PERI_UART0, "peri_uart0", "axi_sel", 19), + GATE_PERI(CLK_PERI_UART1, "peri_uart1", "axi_sel", 20), + GATE_PERI(CLK_PERI_UART2, "peri_uart2", "axi_sel", 21), + GATE_PERI(CLK_PERI_UART3, "peri_uart3", "axi_sel", 22), + GATE_PERI(CLK_PERI_I2C0, "peri_i2c0", "axi_sel", 23), + GATE_PERI(CLK_PERI_I2C1, "peri_i2c1", "axi_sel", 24), + GATE_PERI(CLK_PERI_I2C2, "peri_i2c2", "axi_sel", 25), + GATE_PERI(CLK_PERI_I2C3, "peri_i2c3", "axi_sel", 26), + GATE_PERI(CLK_PERI_I2C4, "peri_i2c4", "axi_sel", 27), + GATE_PERI(CLK_PERI_AUXADC, "peri_auxadc", "clk26m", 28), + GATE_PERI(CLK_PERI_SPI0, "peri_spi0", "spi_sel", 29), +}; + +static u16 peri_rst_ofs[] = { 0x0 }; + +static u16 peri_idx_map[] = { + [MT6795_PERI_NFI_SW_RST] = 14, + [MT6795_PERI_THERM_SW_RST] = 16, + [MT6795_PERI_MSDC1_SW_RST] = 20, +}; + +static const struct mtk_clk_rst_desc clk_rst_desc = { + .version = MTK_RST_SIMPLE, + .rst_bank_ofs = peri_rst_ofs, + .rst_bank_nr = ARRAY_SIZE(peri_rst_ofs), + .rst_idx_map = peri_idx_map, + .rst_idx_map_nr = ARRAY_SIZE(peri_idx_map), +}; + +static const struct of_device_id of_match_clk_mt6795_pericfg[] = { + { .compatible = "mediatek,mt6795-pericfg" }, + { /* sentinel */ } +}; + +static int clk_mt6795_pericfg_probe(struct platform_device *pdev) +{ + struct clk_hw_onecell_data *clk_data; + struct device_node *node = pdev->dev.of_node; + void __iomem *base; + int ret; + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + clk_data = mtk_alloc_clk_data(CLK_PERI_NR_CLK); + if (!clk_data) + return -ENOMEM; + + ret = mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc); + if (ret) + goto free_clk_data; + + ret = mtk_clk_register_gates(node, peri_gates, ARRAY_SIZE(peri_gates), clk_data); + if (ret) + goto free_clk_data; + + ret = mtk_clk_register_composites(peri_clks, ARRAY_SIZE(peri_clks), base, + &mt6795_peri_clk_lock, clk_data); + if (ret) + goto unregister_gates; + + ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data); + if (ret) + goto unregister_composites; + + return 0; + +unregister_composites: + mtk_clk_unregister_composites(peri_clks, ARRAY_SIZE(peri_clks), clk_data); +unregister_gates: + mtk_clk_unregister_gates(peri_gates, ARRAY_SIZE(peri_gates), clk_data); +free_clk_data: + mtk_free_clk_data(clk_data); + return ret; +} + +static int clk_mt6795_pericfg_remove(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev); + + of_clk_del_provider(node); + mtk_clk_unregister_composites(peri_clks, ARRAY_SIZE(peri_clks), clk_data); + mtk_clk_unregister_gates(peri_gates, ARRAY_SIZE(peri_gates), clk_data); + mtk_free_clk_data(clk_data); + + return 0; +} + +static struct platform_driver clk_mt6795_pericfg_drv = { + .driver = { + .name = "clk-mt6795-pericfg", + .of_match_table = of_match_clk_mt6795_pericfg, + }, + .probe = clk_mt6795_pericfg_probe, + .remove = clk_mt6795_pericfg_remove, +}; +module_platform_driver(clk_mt6795_pericfg_drv); + +MODULE_DESCRIPTION("MediaTek MT6795 pericfg clocks driver"); +MODULE_LICENSE("GPL"); |