7ad073695d
We're planning to remove the gpiochip_add() function to swith to gpiochip_add_data() with NULL for data argument. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
235 lines
6.2 KiB
C
235 lines
6.2 KiB
C
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* 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/of_address.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>
|
|
#include <linux/vexpress.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
|
|
|
|
#define SYS_HBI_MASK 0xfff
|
|
#define SYS_PROCIDx_HBI_SHIFT 0
|
|
|
|
#define SYS_MISC_MASTERSITE (1 << 14)
|
|
|
|
void vexpress_flags_set(u32 data)
|
|
{
|
|
static void __iomem *base;
|
|
|
|
if (!base) {
|
|
struct device_node *node = of_find_compatible_node(NULL, NULL,
|
|
"arm,vexpress-sysreg");
|
|
|
|
base = of_iomap(node, 0);
|
|
}
|
|
|
|
if (WARN_ON(!base))
|
|
return;
|
|
|
|
writel(~0, base + SYS_FLAGSCLR);
|
|
writel(data, base + SYS_FLAGSSET);
|
|
}
|
|
|
|
/* The sysreg block is just a random collection of various functions... */
|
|
|
|
static struct syscon_platform_data vexpress_sysreg_sys_id_pdata = {
|
|
.label = "sys_id",
|
|
};
|
|
|
|
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 syscon_platform_data vexpress_sysreg_sys_misc_pdata = {
|
|
.label = "sys_misc",
|
|
};
|
|
|
|
static struct syscon_platform_data vexpress_sysreg_sys_procid_pdata = {
|
|
.label = "sys_procid",
|
|
};
|
|
|
|
static struct mfd_cell vexpress_sysreg_cells[] = {
|
|
{
|
|
.name = "syscon",
|
|
.num_resources = 1,
|
|
.resources = (struct resource []) {
|
|
DEFINE_RES_MEM(SYS_ID, 0x4),
|
|
},
|
|
.platform_data = &vexpress_sysreg_sys_id_pdata,
|
|
.pdata_size = sizeof(vexpress_sysreg_sys_id_pdata),
|
|
}, {
|
|
.name = "basic-mmio-gpio",
|
|
.of_compatible = "arm,vexpress-sysreg,sys_led",
|
|
.num_resources = 1,
|
|
.resources = (struct resource []) {
|
|
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 = (struct resource []) {
|
|
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 = (struct resource []) {
|
|
DEFINE_RES_MEM_NAMED(SYS_FLASH, 0x4, "dat"),
|
|
},
|
|
.platform_data = &vexpress_sysreg_sys_flash_pdata,
|
|
.pdata_size = sizeof(vexpress_sysreg_sys_flash_pdata),
|
|
}, {
|
|
.name = "syscon",
|
|
.num_resources = 1,
|
|
.resources = (struct resource []) {
|
|
DEFINE_RES_MEM(SYS_MISC, 0x4),
|
|
},
|
|
.platform_data = &vexpress_sysreg_sys_misc_pdata,
|
|
.pdata_size = sizeof(vexpress_sysreg_sys_misc_pdata),
|
|
}, {
|
|
.name = "syscon",
|
|
.num_resources = 1,
|
|
.resources = (struct resource []) {
|
|
DEFINE_RES_MEM(SYS_PROCID0, 0x8),
|
|
},
|
|
.platform_data = &vexpress_sysreg_sys_procid_pdata,
|
|
.pdata_size = sizeof(vexpress_sysreg_sys_procid_pdata),
|
|
}, {
|
|
.name = "vexpress-syscfg",
|
|
.num_resources = 1,
|
|
.resources = (struct resource []) {
|
|
DEFINE_RES_MEM(SYS_CFGDATA, 0xc),
|
|
},
|
|
}
|
|
};
|
|
|
|
static int vexpress_sysreg_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *mem;
|
|
void __iomem *base;
|
|
struct gpio_chip *mmc_gpio_chip;
|
|
int master;
|
|
u32 dt_hbi;
|
|
|
|
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;
|
|
|
|
master = readl(base + SYS_MISC) & SYS_MISC_MASTERSITE ?
|
|
VEXPRESS_SITE_DB2 : VEXPRESS_SITE_DB1;
|
|
vexpress_config_set_master(master);
|
|
|
|
/* Confirm board type against DT property, if available */
|
|
if (of_property_read_u32(of_root, "arm,hbi", &dt_hbi) == 0) {
|
|
u32 id = readl(base + (master == VEXPRESS_SITE_DB1 ?
|
|
SYS_PROCID0 : SYS_PROCID1));
|
|
u32 hbi = (id >> SYS_PROCIDx_HBI_SHIFT) & SYS_HBI_MASK;
|
|
|
|
if (WARN_ON(dt_hbi != hbi))
|
|
dev_warn(&pdev->dev, "DT HBI (%x) is not matching hardware (%x)!\n",
|
|
dt_hbi, hbi);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
gpiochip_add_data(mmc_gpio_chip, NULL);
|
|
|
|
return 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", },
|
|
{},
|
|
};
|
|
|
|
static struct platform_driver vexpress_sysreg_driver = {
|
|
.driver = {
|
|
.name = "vexpress-sysreg",
|
|
.of_match_table = vexpress_sysreg_match,
|
|
},
|
|
.probe = vexpress_sysreg_probe,
|
|
};
|
|
|
|
static int __init vexpress_sysreg_init(void)
|
|
{
|
|
struct device_node *node;
|
|
|
|
/* Need the sysreg early, before any other device... */
|
|
for_each_matching_node(node, vexpress_sysreg_match)
|
|
of_platform_device_create(node, NULL, NULL);
|
|
|
|
return platform_driver_register(&vexpress_sysreg_driver);
|
|
}
|
|
core_initcall(vexpress_sysreg_init);
|