11802d0beSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
288e0abcdSPawel Moll /*
388e0abcdSPawel Moll *
488e0abcdSPawel Moll * Copyright (C) 2012 ARM Limited
588e0abcdSPawel Moll */
688e0abcdSPawel Moll
70f4630f3SLinus Walleij #include <linux/gpio/driver.h>
888e0abcdSPawel Moll #include <linux/err.h>
988e0abcdSPawel Moll #include <linux/io.h>
10974cc7b9SPawel Moll #include <linux/mfd/core.h>
117b9d428eSRob Herring #include <linux/module.h>
123b9334acSPawel Moll #include <linux/of_platform.h>
13974cc7b9SPawel Moll #include <linux/platform_data/syscon.h>
1488e0abcdSPawel Moll #include <linux/platform_device.h>
1588e0abcdSPawel Moll #include <linux/slab.h>
1688e0abcdSPawel Moll #include <linux/stat.h>
1788e0abcdSPawel Moll
1888e0abcdSPawel Moll #define SYS_ID 0x000
1988e0abcdSPawel Moll #define SYS_SW 0x004
2088e0abcdSPawel Moll #define SYS_LED 0x008
2188e0abcdSPawel Moll #define SYS_100HZ 0x024
2288e0abcdSPawel Moll #define SYS_FLAGSSET 0x030
2388e0abcdSPawel Moll #define SYS_FLAGSCLR 0x034
2488e0abcdSPawel Moll #define SYS_NVFLAGS 0x038
2588e0abcdSPawel Moll #define SYS_NVFLAGSSET 0x038
2688e0abcdSPawel Moll #define SYS_NVFLAGSCLR 0x03c
2788e0abcdSPawel Moll #define SYS_MCI 0x048
2888e0abcdSPawel Moll #define SYS_FLASH 0x04c
2988e0abcdSPawel Moll #define SYS_CFGSW 0x058
3088e0abcdSPawel Moll #define SYS_24MHZ 0x05c
3188e0abcdSPawel Moll #define SYS_MISC 0x060
3288e0abcdSPawel Moll #define SYS_DMA 0x064
3388e0abcdSPawel Moll #define SYS_PROCID0 0x084
3488e0abcdSPawel Moll #define SYS_PROCID1 0x088
3588e0abcdSPawel Moll #define SYS_CFGDATA 0x0a0
3688e0abcdSPawel Moll #define SYS_CFGCTRL 0x0a4
3788e0abcdSPawel Moll #define SYS_CFGSTAT 0x0a8
3888e0abcdSPawel Moll
39974cc7b9SPawel Moll /* The sysreg block is just a random collection of various functions... */
408eb12b98SPawel Moll
41974cc7b9SPawel Moll static struct bgpio_pdata vexpress_sysreg_sys_led_pdata = {
42974cc7b9SPawel Moll .label = "sys_led",
43974cc7b9SPawel Moll .base = -1,
44974cc7b9SPawel Moll .ngpio = 8,
4588e0abcdSPawel Moll };
4688e0abcdSPawel Moll
47974cc7b9SPawel Moll static struct bgpio_pdata vexpress_sysreg_sys_mci_pdata = {
48974cc7b9SPawel Moll .label = "sys_mci",
49974cc7b9SPawel Moll .base = -1,
50974cc7b9SPawel Moll .ngpio = 2,
518ea402f5SPawel Moll };
528ea402f5SPawel Moll
53974cc7b9SPawel Moll static struct bgpio_pdata vexpress_sysreg_sys_flash_pdata = {
54974cc7b9SPawel Moll .label = "sys_flash",
55974cc7b9SPawel Moll .base = -1,
56974cc7b9SPawel Moll .ngpio = 1,
578ea402f5SPawel Moll };
588ea402f5SPawel Moll
59974cc7b9SPawel Moll static struct mfd_cell vexpress_sysreg_cells[] = {
6088e0abcdSPawel Moll {
61974cc7b9SPawel Moll .name = "basic-mmio-gpio",
62974cc7b9SPawel Moll .of_compatible = "arm,vexpress-sysreg,sys_led",
63974cc7b9SPawel Moll .num_resources = 1,
64*f613faccSAndy Shevchenko .resources = &DEFINE_RES_MEM_NAMED(SYS_LED, 0x4, "dat"),
65974cc7b9SPawel Moll .platform_data = &vexpress_sysreg_sys_led_pdata,
66974cc7b9SPawel Moll .pdata_size = sizeof(vexpress_sysreg_sys_led_pdata),
67974cc7b9SPawel Moll }, {
68974cc7b9SPawel Moll .name = "basic-mmio-gpio",
69974cc7b9SPawel Moll .of_compatible = "arm,vexpress-sysreg,sys_mci",
70974cc7b9SPawel Moll .num_resources = 1,
71*f613faccSAndy Shevchenko .resources = &DEFINE_RES_MEM_NAMED(SYS_MCI, 0x4, "dat"),
72974cc7b9SPawel Moll .platform_data = &vexpress_sysreg_sys_mci_pdata,
73974cc7b9SPawel Moll .pdata_size = sizeof(vexpress_sysreg_sys_mci_pdata),
74974cc7b9SPawel Moll }, {
75974cc7b9SPawel Moll .name = "basic-mmio-gpio",
76974cc7b9SPawel Moll .of_compatible = "arm,vexpress-sysreg,sys_flash",
77974cc7b9SPawel Moll .num_resources = 1,
78*f613faccSAndy Shevchenko .resources = &DEFINE_RES_MEM_NAMED(SYS_FLASH, 0x4, "dat"),
79974cc7b9SPawel Moll .platform_data = &vexpress_sysreg_sys_flash_pdata,
80974cc7b9SPawel Moll .pdata_size = sizeof(vexpress_sysreg_sys_flash_pdata),
81974cc7b9SPawel Moll }, {
82974cc7b9SPawel Moll .name = "vexpress-syscfg",
83974cc7b9SPawel Moll .num_resources = 1,
84*f613faccSAndy Shevchenko .resources = &DEFINE_RES_MEM(SYS_MISC, 0x4c),
8588e0abcdSPawel Moll }
86974cc7b9SPawel Moll };
8788e0abcdSPawel Moll
vexpress_sysreg_probe(struct platform_device * pdev)88612b95cdSGreg Kroah-Hartman static int vexpress_sysreg_probe(struct platform_device *pdev)
8988e0abcdSPawel Moll {
90974cc7b9SPawel Moll struct resource *mem;
91974cc7b9SPawel Moll void __iomem *base;
920f4630f3SLinus Walleij struct gpio_chip *mmc_gpio_chip;
9388e0abcdSPawel Moll
94974cc7b9SPawel Moll mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
95974cc7b9SPawel Moll if (!mem)
96974cc7b9SPawel Moll return -EINVAL;
9788e0abcdSPawel Moll
98974cc7b9SPawel Moll base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
99974cc7b9SPawel Moll if (!base)
100974cc7b9SPawel Moll return -ENOMEM;
10188e0abcdSPawel Moll
102974cc7b9SPawel Moll /*
103974cc7b9SPawel Moll * Duplicated SYS_MCI pseudo-GPIO controller for compatibility with
104974cc7b9SPawel Moll * older trees using sysreg node for MMC control lines.
105974cc7b9SPawel Moll */
106974cc7b9SPawel Moll mmc_gpio_chip = devm_kzalloc(&pdev->dev, sizeof(*mmc_gpio_chip),
107974cc7b9SPawel Moll GFP_KERNEL);
108974cc7b9SPawel Moll if (!mmc_gpio_chip)
109974cc7b9SPawel Moll return -ENOMEM;
110974cc7b9SPawel Moll bgpio_init(mmc_gpio_chip, &pdev->dev, 0x4, base + SYS_MCI,
111974cc7b9SPawel Moll NULL, NULL, NULL, NULL, 0);
1120f4630f3SLinus Walleij mmc_gpio_chip->ngpio = 2;
1130ea355efSRob Herring devm_gpiochip_add_data(&pdev->dev, mmc_gpio_chip, NULL);
11488e0abcdSPawel Moll
1150ea355efSRob Herring return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO,
116974cc7b9SPawel Moll vexpress_sysreg_cells,
117974cc7b9SPawel Moll ARRAY_SIZE(vexpress_sysreg_cells), mem, 0, NULL);
11888e0abcdSPawel Moll }
11988e0abcdSPawel Moll
12088e0abcdSPawel Moll static const struct of_device_id vexpress_sysreg_match[] = {
12188e0abcdSPawel Moll { .compatible = "arm,vexpress-sysreg", },
12288e0abcdSPawel Moll {},
12388e0abcdSPawel Moll };
1247b9d428eSRob Herring MODULE_DEVICE_TABLE(of, vexpress_sysreg_match);
12588e0abcdSPawel Moll
12688e0abcdSPawel Moll static struct platform_driver vexpress_sysreg_driver = {
12788e0abcdSPawel Moll .driver = {
12888e0abcdSPawel Moll .name = "vexpress-sysreg",
12988e0abcdSPawel Moll .of_match_table = vexpress_sysreg_match,
13088e0abcdSPawel Moll },
13188e0abcdSPawel Moll .probe = vexpress_sysreg_probe,
13288e0abcdSPawel Moll };
13388e0abcdSPawel Moll
1347b9d428eSRob Herring module_platform_driver(vexpress_sysreg_driver);
1357b9d428eSRob Herring MODULE_LICENSE("GPL v2");
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