projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 701190fd MW |
1 | /* |
| 2 | * Intel Lynxpoint LPSS clocks. | |
| 3 | * | |
| 4 | * Copyright (C) 2013, Intel Corporation | |
| 5 | * Authors: Mika Westerberg <mika.westerberg@linux.intel.com> | |
| 6 | * Heikki Krogerus <heikki.krogerus@linux.intel.com> | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/acpi.h> | |
| 14 | #include <linux/clk.h> | |
| 15 | #include <linux/clkdev.h> | |
| 16 | #include <linux/clk-provider.h> | |
| 17 | #include <linux/err.h> | |
| 18 | #include <linux/module.h> | |
| 19 | #include <linux/platform_device.h> | |
| 20 | ||
| 21 | #include "clk-lpss.h" | |
| 22 | ||
| 23 | #define PRV_CLOCK_PARAMS 0x800 | |
| 24 | ||
| 25 | static int lpt_clk_probe(struct platform_device *pdev) | |
| 26 | { | |
| 27 | struct clk *clk; | |
| 28 | ||
| 29 | /* LPSS free running clock */ | |
| 30 | clk = clk_register_fixed_rate(&pdev->dev, "lpss_clk", NULL, CLK_IS_ROOT, | |
| 31 | 100000000); | |
| 32 | if (IS_ERR(clk)) | |
| 33 | return PTR_ERR(clk); | |
| 34 | ||
| 35 | /* Shared DMA clock */ | |
| 36 | clk_register_clkdev(clk, "hclk", "INTL9C60.0.auto"); | |
| 37 | ||
| 38 | /* SPI clocks */ | |
| 39 | clk = clk_register_lpss_gate("spi0_clk", "lpss_clk", "INT33C0", NULL, | |
| 40 | PRV_CLOCK_PARAMS); | |
| 41 | if (!IS_ERR(clk)) | |
| 42 | clk_register_clkdev(clk, NULL, "INT33C0:00"); | |
| 43 | ||
| 44 | clk = clk_register_lpss_gate("spi1_clk", "lpss_clk", "INT33C1", NULL, | |
| 45 | PRV_CLOCK_PARAMS); | |
| 46 | if (!IS_ERR(clk)) | |
| 47 | clk_register_clkdev(clk, NULL, "INT33C1:00"); | |
| 48 | ||
| 49 | /* I2C clocks */ | |
| 50 | clk = clk_register_lpss_gate("i2c0_clk", "lpss_clk", "INT33C2", NULL, | |
| 51 | PRV_CLOCK_PARAMS); | |
| 52 | if (!IS_ERR(clk)) | |
| 53 | clk_register_clkdev(clk, NULL, "INT33C2:00"); | |
| 54 | ||
| 55 | clk = clk_register_lpss_gate("i2c1_clk", "lpss_clk", "INT33C3", NULL, | |
| 56 | PRV_CLOCK_PARAMS); | |
| 57 | if (!IS_ERR(clk)) | |
| 58 | clk_register_clkdev(clk, NULL, "INT33C3:00"); | |
| 59 | ||
| 60 | /* UART clocks */ | |
| 61 | clk = clk_register_lpss_gate("uart0_clk", "lpss_clk", "INT33C4", NULL, | |
| 62 | PRV_CLOCK_PARAMS); | |
| 63 | if (!IS_ERR(clk)) | |
| 64 | clk_register_clkdev(clk, NULL, "INT33C4:00"); | |
| 65 | ||
| 66 | clk = clk_register_lpss_gate("uart1_clk", "lpss_clk", "INT33C5", NULL, | |
| 67 | PRV_CLOCK_PARAMS); | |
| 68 | if (!IS_ERR(clk)) | |
| 69 | clk_register_clkdev(clk, NULL, "INT33C5:00"); | |
| 70 | ||
| 71 | return 0; | |
| 72 | } | |
| 73 | ||
| 74 | static struct platform_driver lpt_clk_driver = { | |
| 75 | .driver = { | |
| 76 | .name = "clk-lpt", | |
| 77 | .owner = THIS_MODULE, | |
| 78 | }, | |
| 79 | .probe = lpt_clk_probe, | |
| 80 | }; | |
| 81 | ||
| 82 | static int __init lpt_clk_init(void) | |
| 83 | { | |
| 84 | return platform_driver_register(&lpt_clk_driver); | |
| 85 | } | |
| 86 | arch_initcall(lpt_clk_init); |