Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | // SPDX-License-Identifier: GPL-2.0-only /* * * Copyright (C) 2012 ARM Limited */ #include <linux/gpio/driver.h> #include <linux/err.h> #include <linux/io.h> #include <linux/mfd/core.h> #include <linux/module.h> #include <linux/of_platform.h> #include <linux/platform_data/syscon.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/stat.h> #define SYS_ID 0x000 #define SYS_SW 0x004 #define SYS_LED 0x008 #define SYS_100HZ 0x024 #define SYS_FLAGSSET 0x030 #define SYS_FLAGSCLR 0x034 #define SYS_NVFLAGS 0x038 #define SYS_NVFLAGSSET 0x038 #define SYS_NVFLAGSCLR 0x03c #define SYS_MCI 0x048 #define SYS_FLASH 0x04c #define SYS_CFGSW 0x058 #define SYS_24MHZ 0x05c #define SYS_MISC 0x060 #define SYS_DMA 0x064 #define SYS_PROCID0 0x084 #define SYS_PROCID1 0x088 #define SYS_CFGDATA 0x0a0 #define SYS_CFGCTRL 0x0a4 #define SYS_CFGSTAT 0x0a8 /* The sysreg block is just a random collection of various functions... */ static struct bgpio_pdata vexpress_sysreg_sys_led_pdata = { .label = "sys_led", .base = -1, .ngpio = 8, }; static struct bgpio_pdata vexpress_sysreg_sys_mci_pdata = { .label = "sys_mci", .base = -1, .ngpio = 2, }; static struct bgpio_pdata vexpress_sysreg_sys_flash_pdata = { .label = "sys_flash", .base = -1, .ngpio = 1, }; static struct mfd_cell vexpress_sysreg_cells[] = { { .name = "basic-mmio-gpio", .of_compatible = "arm,vexpress-sysreg,sys_led", .num_resources = 1, .resources = &DEFINE_RES_MEM_NAMED(SYS_LED, 0x4, "dat"), .platform_data = &vexpress_sysreg_sys_led_pdata, .pdata_size = sizeof(vexpress_sysreg_sys_led_pdata), }, { .name = "basic-mmio-gpio", .of_compatible = "arm,vexpress-sysreg,sys_mci", .num_resources = 1, .resources = &DEFINE_RES_MEM_NAMED(SYS_MCI, 0x4, "dat"), .platform_data = &vexpress_sysreg_sys_mci_pdata, .pdata_size = sizeof(vexpress_sysreg_sys_mci_pdata), }, { .name = "basic-mmio-gpio", .of_compatible = "arm,vexpress-sysreg,sys_flash", .num_resources = 1, .resources = &DEFINE_RES_MEM_NAMED(SYS_FLASH, 0x4, "dat"), .platform_data = &vexpress_sysreg_sys_flash_pdata, .pdata_size = sizeof(vexpress_sysreg_sys_flash_pdata), }, { .name = "vexpress-syscfg", .num_resources = 1, .resources = &DEFINE_RES_MEM(SYS_MISC, 0x4c), } }; static int vexpress_sysreg_probe(struct platform_device *pdev) { struct resource *mem; void __iomem *base; struct gpio_chip *mmc_gpio_chip; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) return -EINVAL; base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem)); if (!base) return -ENOMEM; /* * Duplicated SYS_MCI pseudo-GPIO controller for compatibility with * older trees using sysreg node for MMC control lines. */ mmc_gpio_chip = devm_kzalloc(&pdev->dev, sizeof(*mmc_gpio_chip), GFP_KERNEL); if (!mmc_gpio_chip) return -ENOMEM; bgpio_init(mmc_gpio_chip, &pdev->dev, 0x4, base + SYS_MCI, NULL, NULL, NULL, NULL, 0); mmc_gpio_chip->ngpio = 2; devm_gpiochip_add_data(&pdev->dev, mmc_gpio_chip, NULL); return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO, vexpress_sysreg_cells, ARRAY_SIZE(vexpress_sysreg_cells), mem, 0, NULL); } static const struct of_device_id vexpress_sysreg_match[] = { { .compatible = "arm,vexpress-sysreg", }, {}, }; MODULE_DEVICE_TABLE(of, vexpress_sysreg_match); static struct platform_driver vexpress_sysreg_driver = { .driver = { .name = "vexpress-sysreg", .of_match_table = vexpress_sysreg_match, }, .probe = vexpress_sysreg_probe, }; module_platform_driver(vexpress_sysreg_driver); MODULE_LICENSE("GPL v2"); |