diff options
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/mfd/Makefile | 2 | ||||
| -rw-r--r-- | drivers/mfd/bcm590xx.c | 60 | ||||
| -rw-r--r-- | drivers/mfd/syscon.c | 4 | ||||
| -rw-r--r-- | drivers/mfd/vexpress-config.c | 287 | ||||
| -rw-r--r-- | drivers/mfd/vexpress-sysreg.c | 554 |
6 files changed, 212 insertions, 710 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 60cef41b0af4..ee8204cc31e9 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1258,12 +1258,17 @@ config MCP_UCB1200_TS endmenu -config VEXPRESS_CONFIG - bool "ARM Versatile Express platform infrastructure" - depends on ARM || ARM64 +config MFD_VEXPRESS_SYSREG + bool "Versatile Express System Registers" + depends on VEXPRESS_CONFIG && GPIOLIB + default y + select CLKSRC_MMIO + select GPIO_GENERIC_PLATFORM + select MFD_CORE + select MFD_SYSCON help - Platform configuration infrastructure for the ARM Ltd. - Versatile Express. + System Registers are the platform configuration block + on the ARM Ltd. Versatile Express board. endmenu endif diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 5dec445ab139..8afedba535c7 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -163,7 +163,7 @@ obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o obj-$(CONFIG_MFD_SEC_CORE) += sec-core.o sec-irq.o obj-$(CONFIG_MFD_SYSCON) += syscon.o obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o -obj-$(CONFIG_VEXPRESS_CONFIG) += vexpress-config.o vexpress-sysreg.o +obj-$(CONFIG_MFD_VEXPRESS_SYSREG) += vexpress-sysreg.o obj-$(CONFIG_MFD_RETU) += retu-mfd.o obj-$(CONFIG_MFD_AS3711) += as3711.o obj-$(CONFIG_MFD_AS3722) += as3722.o diff --git a/drivers/mfd/bcm590xx.c b/drivers/mfd/bcm590xx.c index be4d0ac4874c..e334de000e8c 100644 --- a/drivers/mfd/bcm590xx.c +++ b/drivers/mfd/bcm590xx.c @@ -28,39 +28,71 @@ static const struct mfd_cell bcm590xx_devs[] = { }, }; -static const struct regmap_config bcm590xx_regmap_config = { +static const struct regmap_config bcm590xx_regmap_config_pri = { .reg_bits = 8, .val_bits = 8, - .max_register = BCM590XX_MAX_REGISTER, + .max_register = BCM590XX_MAX_REGISTER_PRI, .cache_type = REGCACHE_RBTREE, }; -static int bcm590xx_i2c_probe(struct i2c_client *i2c, +static const struct regmap_config bcm590xx_regmap_config_sec = { + .reg_bits = 8, + .val_bits = 8, + .max_register = BCM590XX_MAX_REGISTER_SEC, + .cache_type = REGCACHE_RBTREE, +}; + +static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri, const struct i2c_device_id *id) { struct bcm590xx *bcm590xx; int ret; - bcm590xx = devm_kzalloc(&i2c->dev, sizeof(*bcm590xx), GFP_KERNEL); + bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL); if (!bcm590xx) return -ENOMEM; - i2c_set_clientdata(i2c, bcm590xx); - bcm590xx->dev = &i2c->dev; - bcm590xx->i2c_client = i2c; + i2c_set_clientdata(i2c_pri, bcm590xx); + bcm590xx->dev = &i2c_pri->dev; + bcm590xx->i2c_pri = i2c_pri; - bcm590xx->regmap = devm_regmap_init_i2c(i2c, &bcm590xx_regmap_config); - if (IS_ERR(bcm590xx->regmap)) { - ret = PTR_ERR(bcm590xx->regmap); - dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); + bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri, + &bcm590xx_regmap_config_pri); + if (IS_ERR(bcm590xx->regmap_pri)) { + ret = PTR_ERR(bcm590xx->regmap_pri); + dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret); return ret; } - ret = mfd_add_devices(&i2c->dev, -1, bcm590xx_devs, + /* Secondary I2C slave address is the base address with A(2) asserted */ + bcm590xx->i2c_sec = i2c_new_dummy(i2c_pri->adapter, + i2c_pri->addr | BIT(2)); + if (IS_ERR_OR_NULL(bcm590xx->i2c_sec)) { + dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n"); + return -ENODEV; + } + i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx); + + bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec, + &bcm590xx_regmap_config_sec); + if (IS_ERR(bcm590xx->regmap_sec)) { + ret = PTR_ERR(bcm590xx->regmap_sec); + dev_err(&bcm590xx->i2c_sec->dev, + "secondary regmap init failed: %d\n", ret); + goto err; + } + + ret = mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs, ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL); - if (ret < 0) - dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret); + if (ret < 0) { + dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret); + goto err; + } + + return 0; +err: + i2c_unregister_device(bcm590xx->i2c_sec); return ret; } diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c index b30f94179f4e..ca15878ce5c0 100644 --- a/drivers/mfd/syscon.c +++ b/drivers/mfd/syscon.c @@ -18,6 +18,7 @@ #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_platform.h> +#include <linux/platform_data/syscon.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/mfd/syscon.h> @@ -123,6 +124,7 @@ static struct regmap_config syscon_regmap_config = { static int syscon_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct syscon_platform_data *pdata = dev_get_platdata(dev); struct syscon *syscon; struct resource *res; void __iomem *base; @@ -140,6 +142,8 @@ static int syscon_probe(struct platform_device *pdev) return -ENOMEM; syscon_regmap_config.max_register = res->end - res->start - 3; + if (pdata) + syscon_regmap_config.name = pdata->label; syscon->regmap = devm_regmap_init_mmio(dev, base, &syscon_regmap_config); if (IS_ERR(syscon->regmap)) { diff --git a/drivers/mfd/vexpress-config.c b/drivers/mfd/vexpress-config.c deleted file mode 100644 index d0db89d13e01..000000000000 --- a/drivers/mfd/vexpress-config.c +++ /dev/null @@ -1,287 +0,0 @@ -/* - * 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 - */ - -#define pr_fmt(fmt) "vexpress-config: " fmt - -#include <linux/bitops.h> -#include <linux/completion.h> -#include <linux/export.h> -#include <linux/list.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/vexpress.h> - - -#define VEXPRESS_CONFIG_MAX_BRIDGES 2 - -static struct vexpress_config_bridge { - struct device_node *node; - struct vexpress_config_bridge_info *info; - struct list_head transactions; - spinlock_t transactions_lock; -} vexpress_config_bridges[VEXPRESS_CONFIG_MAX_BRIDGES]; - -static DECLARE_BITMAP(vexpress_config_bridges_map, - ARRAY_SIZE(vexpress_config_bridges)); -static DEFINE_MUTEX(vexpress_config_bridges_mutex); - -struct vexpress_config_bridge *vexpress_config_bridge_register( - struct device_node *node, - struct vexpress_config_bridge_info *info) -{ - struct vexpress_config_bridge *bridge; - int i; - - pr_debug("Registering bridge '%s'\n", info->name); - - mutex_lock(&vexpress_config_bridges_mutex); - i = find_first_zero_bit(vexpress_config_bridges_map, - ARRAY_SIZE(vexpress_config_bridges)); - if (i >= ARRAY_SIZE(vexpress_config_bridges)) { - pr_err("Can't register more bridges!\n"); - mutex_unlock(&vexpress_config_bridges_mutex); - return NULL; - } - __set_bit(i, vexpress_config_bridges_map); - bridge = &vexpress_config_bridges[i]; - - bridge->node = node; - bridge->info = info; - INIT_LIST_HEAD(&bridge->transactions); - spin_lock_init(&bridge->transactions_lock); - - mutex_unlock(&vexpress_config_bridges_mutex); - - return bridge; -} -EXPORT_SYMBOL(vexpress_config_bridge_register); - -void vexpress_config_bridge_unregister(struct vexpress_config_bridge *bridge) -{ - struct vexpress_config_bridge __bridge = *bridge; - int i; - - mutex_lock(&vexpress_config_bridges_mutex); - for (i = 0; i < ARRAY_SIZE(vexpress_config_bridges); i++) - if (&vexpress_config_bridges[i] == bridge) - __clear_bit(i, vexpress_config_bridges_map); - mutex_unlock(&vexpress_config_bridges_mutex); - - WARN_ON(!list_empty(&__bridge.transactions)); - while (!list_empty(&__bridge.transactions)) - cpu_relax(); -} -EXPORT_SYMBOL(vexpress_config_bridge_unregister); - - -struct vexpress_config_func { - struct vexpress_config_bridge *bridge; - void *func; -}; - -struct vexpress_config_func *__vexpress_config_func_get(struct device *dev, - struct device_node *node) -{ - struct device_node *bridge_node; - struct vexpress_config_func *func; - int i; - - if (WARN_ON(dev && node && dev->of_node != node)) - return NULL; - if (dev && !node) - node = dev->of_node; - - func = kzalloc(sizeof(*func), GFP_KERNEL); - if (!func) - return NULL; - - bridge_node = of_node_get(node); - while (bridge_node) { - const __be32 *prop = of_get_property(bridge_node, - "arm,vexpress,config-bridge", NULL); - - if (prop) { - bridge_node = of_find_node_by_phandle( - be32_to_cpup(prop)); - break; - } - - bridge_node = of_get_next_parent(bridge_node); - } - - mutex_lock(&vexpress_config_bridges_mutex); - for (i = 0; i < ARRAY_SIZE(vexpress_config_bridges); i++) { - struct vexpress_config_bridge *bridge = - &vexpress_config_bridges[i]; - - if (test_bit(i, vexpress_config_bridges_map) && - bridge->node == bridge_node) { - func->bridge = bridge; - func->func = bridge->info->func_get(dev, node); - break; - } - } - mutex_unlock(&vexpress_config_bridges_mutex); - - if (!func->func) { - of_node_put(node); - kfree(func); - return NULL; - } - - return func; -} -EXPORT_SYMBOL(__vexpress_config_func_get); - -void vexpress_config_func_put(struct vexpress_config_func *func) -{ - func->bridge->info->func_put(func->func); - of_node_put(func->bridge->node); - kfree(func); -} -EXPORT_SYMBOL(vexpress_config_func_put); - -struct vexpress_config_trans { - struct vexpress_config_func *func; - int offset; - bool write; - u32 *data; - int status; - struct completion completion; - struct list_head list; -}; - -static void vexpress_config_dump_trans(const char *what, - struct vexpress_config_trans *trans) -{ - pr_debug("%s %s trans %p func 0x%p offset %d data 0x%x status %d\n", - what, trans->write ? "write" : "read", trans, - trans->func->func, trans->offset, - trans->data ? *trans->data : 0, trans->status); -} - -static int vexpress_config_schedule(struct vexpress_config_trans *trans) -{ - int status; - struct vexpress_config_bridge *bridge = trans->func->bridge; - unsigned long flags; - - init_completion(&trans->completion); - trans->status = -EFAULT; - - spin_lock_irqsave(&bridge->transactions_lock, flags); - - if (list_empty(&bridge->transactions)) { - vexpress_config_dump_trans("Executing", trans); - status = bridge->info->func_exec(trans->func->func, - trans->offset, trans->write, trans->data); - } else { - vexpress_config_dump_trans("Queuing", trans); - status = VEXPRESS_CONFIG_STATUS_WAIT; - } - - switch (status) { - case VEXPRESS_CONFIG_STATUS_DONE: - vexpress_config_dump_trans("Finished", trans); - trans->status = status; - break; - case VEXPRESS_CONFIG_STATUS_WAIT: - list_add_tail(&trans->list, &bridge->transactions); - break; - } - - spin_unlock_irqrestore(&bridge->transactions_lock, flags); - - return status; -} - -void vexpress_config_complete(struct vexpress_config_bridge *bridge, - int status) -{ - struct vexpress_config_trans *trans; - unsigned long flags; - const char *message = "Completed"; - - spin_lock_irqsave(&bridge->transactions_lock, flags); - - trans = list_first_entry(&bridge->transactions, - struct vexpress_config_trans, list); - trans->status = status; - - do { - vexpress_config_dump_trans(message, trans); - list_del(&trans->list); - complete(&trans->completion); - - if (list_empty(&bridge->transactions)) - break; - - trans = list_first_entry(&bridge->transactions, - struct vexpress_config_trans, list); - vexpress_config_dump_trans("Executing pending", trans); - trans->status = bridge->info->func_exec(trans->func->func, - trans->offset, trans->write, trans->data); - message = "Finished pending"; - } while (trans->status == VEXPRESS_CONFIG_STATUS_DONE); - - spin_unlock_irqrestore(&bridge->transactions_lock, flags); -} -EXPORT_SYMBOL(vexpress_config_complete); - -int vexpress_config_wait(struct vexpress_config_trans *trans) -{ - wait_for_completion(&trans->completion); - - return trans->status; -} -EXPORT_SYMBOL(vexpress_config_wait); - -int vexpress_config_read(struct vexpress_config_func *func, int offset, - u32 *data) -{ - struct vexpress_config_trans trans = { - .func = func, - .offset = offset, - .write = false, - .data = data, - .status = 0, - }; - int status = vexpress_config_schedule(&trans); - - if (status == VEXPRESS_CONFIG_STATUS_WAIT) - status = vexpress_config_wait(&trans); - - return status; -} -EXPORT_SYMBOL(vexpress_config_read); - -int vexpress_config_write(struct vexpress_config_func *func, int offset, - u32 data) -{ - struct vexpress_config_trans trans = { - .func = func, - .offset = offset, - .write = true, - .data = &data, - .status = 0, - }; - int status = vexpress_config_schedule(&trans); - - if (status == VEXPRESS_CONFIG_STATUS_WAIT) - status = vexpress_config_wait(&trans); - - return status; -} -EXPORT_SYMBOL(vexpress_config_write); diff --git a/drivers/mfd/vexpress-sysreg.c b/drivers/mfd/vexpress-sysreg.c index 35281e804e7e..9e21e4fc9599 100644 --- a/drivers/mfd/vexpress-sysreg.c +++ b/drivers/mfd/vexpress-sysreg.c @@ -11,23 +11,22 @@ * Copyright (C) 2012 ARM Limited */ +#include <linux/basic_mmio_gpio.h> #include <linux/err.h> -#include <linux/gpio.h> #include <linux/io.h> -#include <linux/leds.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/regulator/driver.h> #include <linux/slab.h> #include <linux/stat.h> -#include <linux/timer.h> #include <linux/vexpress.h> #define SYS_ID 0x000 #define SYS_SW 0x004 #define SYS_LED 0x008 #define SYS_100HZ 0x024 -#define SYS_FLAGS 0x030 #define SYS_FLAGSSET 0x030 #define SYS_FLAGSCLR 0x034 #define SYS_NVFLAGS 0x038 @@ -46,465 +45,209 @@ #define SYS_CFGSTAT 0x0a8 #define SYS_HBI_MASK 0xfff -#define SYS_ID_HBI_SHIFT 16 #define SYS_PROCIDx_HBI_SHIFT 0 -#define SYS_LED_LED(n) (1 << (n)) - #define SYS_MCI_CARDIN (1 << 0) #define SYS_MCI_WPROT (1 << 1) -#define SYS_FLASH_WPn (1 << 0) - #define SYS_MISC_MASTERSITE (1 << 14) -#define SYS_CFGCTRL_START (1 << 31) -#define SYS_CFGCTRL_WRITE (1 << 30) -#define SYS_CFGCTRL_DCC(n) (((n) & 0xf) << 26) -#define SYS_CFGCTRL_FUNC(n) (((n) & 0x3f) << 20) -#define SYS_CFGCTRL_SITE(n) (((n) & 0x3) << 16) -#define SYS_CFGCTRL_POSITION(n) (((n) & 0xf) << 12) -#define SYS_CFGCTRL_DEVICE(n) (((n) & 0xfff) << 0) - -#define SYS_CFGSTAT_ERR (1 << 1) -#define SYS_CFGSTAT_COMPLETE (1 << 0) - - -static void __iomem *vexpress_sysreg_base; -static struct device *vexpress_sysreg_dev; -static int vexpress_master_site; - -void vexpress_flags_set(u32 data) -{ - writel(~0, vexpress_sysreg_base + SYS_FLAGSCLR); - writel(data, vexpress_sysreg_base + SYS_FLAGSSET); -} +static void __iomem *__vexpress_sysreg_base; -u32 vexpress_get_procid(int site) +static void __iomem *vexpress_sysreg_base(void) { - if (site == VEXPRESS_SITE_MASTER) - site = vexpress_master_site; - - return readl(vexpress_sysreg_base + (site == VEXPRESS_SITE_DB1 ? - SYS_PROCID0 : SYS_PROCID1)); -} + if (!__vexpress_sysreg_base) { + struct device_node *node = of_find_compatible_node(NULL, NULL, + "arm,vexpress-sysreg"); -u32 vexpress_get_hbi(int site) -{ - u32 id; - - switch (site) { - case VEXPRESS_SITE_MB: - id = readl(vexpress_sysreg_base + SYS_ID); - return (id >> SYS_ID_HBI_SHIFT) & SYS_HBI_MASK; - case VEXPRESS_SITE_MASTER: - case VEXPRESS_SITE_DB1: - case VEXPRESS_SITE_DB2: - id = vexpress_get_procid(site); - return (id >> SYS_PROCIDx_HBI_SHIFT) & SYS_HBI_MASK; + __vexpress_sysreg_base = of_iomap(node, 0); } - return ~0; -} + WARN_ON(!__vexpress_sysreg_base); -void __iomem *vexpress_get_24mhz_clock_base(void) -{ - return vexpress_sysreg_base + SYS_24MHZ; + return __vexpress_sysreg_base; } -static void vexpress_sysreg_find_prop(struct device_node *node, - const char *name, u32 *val) +static int vexpress_sysreg_get_master(void) { - of_node_get(node); - while (node) { - if (of_property_read_u32(node, name, val) == 0) { - of_node_put(node); - return; - } - node = of_get_next_parent(node); - } -} - -unsigned __vexpress_get_site(struct device *dev, struct device_node *node) -{ - u32 site = 0; - - WARN_ON(dev && node && dev->of_node != node); - if (dev && !node) - node = dev->of_node; - - if (node) { - vexpress_sysreg_find_prop(node, "arm,vexpress,site", &site); - } else if (dev && dev->bus == &platform_bus_type) { - struct platform_device *pdev = to_platform_device(dev); - - if (pdev->num_resources == 1 && - pdev->resource[0].flags == IORESOURCE_BUS) - site = pdev->resource[0].start; - } else if (dev && strncmp(dev_name(dev), "ct:", 3) == 0) { - site = VEXPRESS_SITE_MASTER; - } + if (readl(vexpress_sysreg_base() + SYS_MISC) & SYS_MISC_MASTERSITE) + return VEXPRESS_SITE_DB2; - if (site == VEXPRESS_SITE_MASTER) - site = vexpress_master_site; - - return site; + return VEXPRESS_SITE_DB1; } - -struct vexpress_sysreg_config_func { - u32 template; - u32 device; -}; - -static struct vexpress_config_bridge *vexpress_sysreg_config_bridge; -static struct timer_list vexpress_sysreg_config_timer; -static u32 *vexpress_sysreg_config_data; -static int vexpress_sysreg_config_tries; - -static void *vexpress_sysreg_config_func_get(struct device *dev, - struct device_node *node) +void vexpress_flags_set(u32 data) { - struct vexpress_sysreg_config_func *config_func; - u32 site = 0; - u32 position = 0; - u32 dcc = 0; - u32 func_device[2]; - int err = -EFAULT; - - if (node) { - of_node_get(node); - vexpress_sysreg_find_prop(node, "arm,vexpress,site", &site); - vexpress_sysreg_find_prop(node, "arm,vexpress,position", - &position); - vexpress_sysreg_find_prop(node, "arm,vexpress,dcc", &dcc); - err = of_property_read_u32_array(node, - "arm,vexpress-sysreg,func", func_device, - ARRAY_SIZE(func_device)); - of_node_put(node); - } else if (dev && dev->bus == &platform_bus_type) { - struct platform_device *pdev = to_platform_device(dev); - - if (pdev->num_resources == 1 && - pdev->resource[0].flags == IORESOURCE_BUS) { - site = pdev->resource[0].start; - func_device[0] = pdev->resource[0].end; - func_device[1] = pdev->id; - err = 0; - } - } - if (err) - return NULL; - - config_func = kzalloc(sizeof(*config_func), GFP_KERNEL); - if (!config_func) - return NULL; - - config_func->template = SYS_CFGCTRL_DCC(dcc); - config_func->template |= SYS_CFGCTRL_FUNC(func_device[0]); - config_func->template |= SYS_CFGCTRL_SITE(site == VEXPRESS_SITE_MASTER ? - vexpress_master_site : site); - config_func->template |= SYS_CFGCTRL_POSITION(position); - config_func->device |= func_device[1]; - - dev_dbg(vexpress_sysreg_dev, "func 0x%p = 0x%x, %d\n", config_func, - config_func->template, config_func->device); - - return config_func; + writel(~0, vexpress_sysreg_base() + SYS_FLAGSCLR); + writel(data, vexpress_sysreg_base() + SYS_FLAGSSET); } -static void vexpress_sysreg_config_func_put(void *func) +unsigned int vexpress_get_mci_cardin(struct device *dev) { - kfree(func); + return readl(vexpress_sysreg_base() + SYS_MCI) & SYS_MCI_CARDIN; } -static int vexpress_sysreg_config_func_exec(void *func, int offset, - bool write, u32 *data) +u32 vexpress_get_procid(int site) { - int status; - struct vexpress_sysreg_config_func *config_func = func; - u32 command; - - if (WARN_ON(!vexpress_sysreg_base)) - return -ENOENT; - - command = readl(vexpress_sysreg_base + SYS_CFGCTRL); - if (WARN_ON(command & SYS_CFGCTRL_START)) - return -EBUSY; - - command = SYS_CFGCTRL_START; - command |= write ? SYS_CFGCTRL_WRITE : 0; - command |= config_func->template; - command |= SYS_CFGCTRL_DEVICE(config_func->device + offset); - - /* Use a canary for reads */ - if (!write) - *data = 0xdeadbeef; - - dev_dbg(vexpress_sysreg_dev, "command %x, data %x\n", - command, *data); - writel(*data, vexpress_sysreg_base + SYS_CFGDATA); - writel(0, vexpress_sysreg_base + SYS_CFGSTAT); - writel(command, vexpress_sysreg_base + SYS_CFGCTRL); - mb(); - - if (vexpress_sysreg_dev) { - /* Schedule completion check */ - if (!write) - vexpress_sysreg_config_data = data; - vexpress_sysreg_config_tries = 100; - mod_timer(&vexpress_sysreg_config_timer, - jiffies + usecs_to_jiffies(100)); - status = VEXPRESS_CONFIG_STATUS_WAIT; - } else { - /* Early execution, no timer available, have to spin */ - u32 cfgstat; - - do { - cpu_relax(); - cfgstat = readl(vexpress_sysreg_base + SYS_CFGSTAT); - } while (!cfgstat); - - if (!write && (cfgstat & SYS_CFGSTAT_COMPLETE)) - *data = readl(vexpress_sysreg_base + SYS_CFGDATA); - status = VEXPRESS_CONFIG_STATUS_DONE; - - if (cfgstat & SYS_CFGSTAT_ERR) - status = -EINVAL; - } + if (site == VEXPRESS_SITE_MASTER) + site = vexpress_sysreg_get_master(); - return status; + return readl(vexpress_sysreg_base() + (site == VEXPRESS_SITE_DB1 ? + SYS_PROCID0 : SYS_PROCID1)); } -struct vexpress_config_bridge_info vexpress_sysreg_config_bridge_info = { - .name = "vexpress-sysreg", - .func_get = vexpress_sysreg_config_func_get, - .func_put = vexpress_sysreg_config_func_put, - .func_exec = vexpress_sysreg_config_func_exec, -}; - -static void vexpress_sysreg_config_complete(unsigned long data) +void __iomem *vexpress_get_24mhz_clock_base(void) { - int status = VEXPRESS_CONFIG_STATUS_DONE; - u32 cfgstat = readl(vexpress_sysreg_base + SYS_CFGSTAT); - - if (cfgstat & SYS_CFGSTAT_ERR) - status = -EINVAL; - if (!vexpress_sysreg_config_tries--) - status = -ETIMEDOUT; - - if (status < 0) { - dev_err(vexpress_sysreg_dev, "error %d\n", status); - } else if (!(cfgstat & SYS_CFGSTAT_COMPLETE)) { - mod_timer(&vexpress_sysreg_config_timer, - jiffies + usecs_to_jiffies(50)); - return; - } - - if (vexpress_sysreg_config_data) { - *vexpress_sysreg_config_data = readl(vexpress_sysreg_base + - SYS_CFGDATA); - dev_dbg(vexpress_sysreg_dev, "read data %x\n", - *vexpress_sysreg_config_data); - vexpress_sysreg_config_data = NULL; - } - - vexpress_config_complete(vexpress_sysreg_config_bridge, status); + return vexpress_sysreg_base() + SYS_24MHZ; } -void vexpress_sysreg_setup(struct device_node *node) -{ - if (WARN_ON(!vexpress_sysreg_base)) - return; - - if (readl(vexpress_sysreg_base + SYS_MISC) & SYS_MISC_MASTERSITE) - vexpress_master_site = VEXPRESS_SITE_DB2; - else - vexpress_master_site = VEXPRESS_SITE_DB1; - - vexpress_sysreg_config_bridge = vexpress_config_bridge_register( - node, &vexpress_sysreg_config_bridge_info); - WARN_ON(!vexpress_sysreg_config_bridge); -} - void __init vexpress_sysreg_early_init(void __iomem *base) { - vexpress_sysreg_base = base; - vexpress_sysreg_setup(NULL); -} - -void __init vexpress_sysreg_of_early_init(void) -{ - struct device_node *node; - - if (vexpress_sysreg_base) - return; + __vexpress_sysreg_base = base; - node = of_find_compatible_node(NULL, NULL, "arm,vexpress-sysreg"); - if (node) { - vexpress_sysreg_base = of_iomap(node, 0); - vexpress_sysreg_setup(node); - } + vexpress_config_set_master(vexpress_sysreg_get_master()); } -#ifdef CONFIG_GPIOLIB - -#define VEXPRESS_SYSREG_GPIO(_name, _reg, _value) \ - [VEXPRESS_GPIO_##_name] = { \ - .reg = _reg, \ - .value = _reg##_##_value, \ - } +/* The sysreg block is just a random collection of various functions... */ -static struct vexpress_sysreg_gpio { - unsigned long reg; - u32 value; -} vexpress_sysreg_gpios[] = { - VEXPRESS_SYSREG_GPIO(MMC_CARDIN, SYS_MCI, CARDIN), - VEXPRESS_SYSREG_GPIO(MMC_WPROT, SYS_MCI, WPROT), - VEXPRESS_SYSREG_GPIO(FLASH_WPn, SYS_FLASH, WPn), - VEXPRESS_SYSREG_GPIO(LED0, SYS_LED, LED(0)), - VEXPRESS_SYSREG_GPIO(LED1, SYS_LED, LED(1)), - VEXPRESS_SYSREG_GPIO(LED2, SYS_LED, LED(2)), - VEXPRESS_SYSREG_GPIO(LED3, SYS_LED, LED(3)), - VEXPRESS_SYSREG_GPIO(LED4, SYS_LED, LED(4)), - VEXPRESS_SYSREG_GPIO(LED5, SYS_LED, LED(5)), - VEXPRESS_SYSREG_GPIO(LED6, SYS_LED, LED(6)), - VEXPRESS_SYSREG_GPIO(LED7, SYS_LED, LED(7)), +static struct syscon_platform_data vexpress_sysreg_sys_id_pdata = { + .label = "sys_id", }; -static int vexpress_sysreg_gpio_direction_input(struct gpio_chip *chip, - unsigned offset) -{ - return 0; -} - -static int vexpress_sysreg_gpio_get(struct gpio_chip *chip, - unsigned offset) -{ - struct vexpress_sysreg_gpio *gpio = &vexpress_sysreg_gpios[offset]; - u32 reg_value = readl(vexpress_sysreg_base + gpio->reg); - - return !!(reg_value & gpio->value); -} - -static void vexpress_sysreg_gpio_set(struct gpio_chip *chip, - unsigned offset, int value) -{ - struct vexpress_sysreg_gpio *gpio = &vexpress_sysreg_gpios[offset]; - u32 reg_value = readl(vexpress_sysreg_base + gpio->reg); - - if (value) - reg_value |= gpio->value; - else - reg_value &= ~gpio->value; - - writel(reg_value, vexpress_sysreg_base + gpio->reg); -} - -static int vexpress_sysreg_gpio_direction_output(struct gpio_chip *chip, - unsigned offset, int value) -{ - vexpress_sysreg_gpio_set(chip, offset, value); - - return 0; -} - -static struct gpio_chip vexpress_sysreg_gpio_chip = { - .label = "vexpress-sysreg", - .direction_input = vexpress_sysreg_gpio_direction_input, - .direction_output = vexpress_sysreg_gpio_direction_output, - .get = vexpress_sysreg_gpio_get, - .set = vexpress_sysreg_gpio_set, - .ngpio = ARRAY_SIZE(vexpress_sysreg_gpios), - .base = 0, +static struct bgpio_pdata vexpress_sysreg_sys_led_pdata = { + .label = "sys_led", + .base = -1, + .ngpio = 8, }; - -#define VEXPRESS_SYSREG_GREEN_LED(_name, _default_trigger, _gpio) \ - { \ - .name = "v2m:green:"_name, \ - .default_trigger = _default_trigger, \ - .gpio = VEXPRESS_GPIO_##_gpio, \ - } - -struct gpio_led vexpress_sysreg_leds[] = { - VEXPRESS_SYSREG_GREEN_LED("user1", "heartbeat", LED0), - VEXPRESS_SYSREG_GREEN_LED("user2", "mmc0", LED1), - VEXPRESS_SYSREG_GREEN_LED("user3", "cpu0", LED2), - VEXPRESS_SYSREG_GREEN_LED("user4", "cpu1", LED3), - VEXPRESS_SYSREG_GREEN_LED("user5", "cpu2", LED4), - VEXPRESS_SYSREG_GREEN_LED("user6", "cpu3", LED5), - VEXPRESS_SYSREG_GREEN_LED("user7", "cpu4", LED6), - VEXPRESS_SYSREG_GREEN_LED("user8", "cpu5", LED7), +static struct bgpio_pdata vexpress_sysreg_sys_mci_pdata = { + .label = "sys_mci", + .base = -1, + .ngpio = 2, }; -struct gpio_led_platform_data vexpress_sysreg_leds_pdata = { - .num_leds = ARRAY_SIZE(vexpress_sysreg_leds), - .leds = vexpress_sysreg_leds, +static struct bgpio_pdata vexpress_sysreg_sys_flash_pdata = { + .label = "sys_flash", + .base = -1, + .ngpio = 1, }; -#endif - +static struct syscon_platform_data vexpress_sysreg_sys_misc_pdata = { + .label = "sys_misc", +}; -static ssize_t vexpress_sysreg_sys_id_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "0x%08x\n", readl(vexpress_sysreg_base + SYS_ID)); -} +static struct syscon_platform_data vexpress_sysreg_sys_procid_pdata = { + .label = "sys_procid", +}; -DEVICE_ATTR(sys_id, S_IRUGO, vexpress_sysreg_sys_id_show, NULL); +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) { - int err; - struct resource *res = platform_get_resource(pdev, - IORESOURCE_MEM, 0); - - if (!devm_request_mem_region(&pdev->dev, res->start, - resource_size(res), pdev->name)) { - dev_err(&pdev->dev, "Failed to request memory region!\n"); - return -EBUSY; - } + struct resource *mem; + void __iomem *base; + struct bgpio_chip *mmc_gpio_chip; + u32 dt_hbi; - if (!vexpress_sysreg_base) { - vexpress_sysreg_base = devm_ioremap(&pdev->dev, res->start, - resource_size(res)); - vexpress_sysreg_setup(pdev->dev.of_node); - } + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) + return -EINVAL; - if (!vexpress_sysreg_base) { - dev_err(&pdev->dev, "Failed to obtain base address!\n"); - return -EFAULT; - } + base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem)); + if (!base) + return -ENOMEM; - setup_timer(&vexpress_sysreg_config_timer, - vexpress_sysreg_config_complete, 0); + vexpress_config_set_master(vexpress_sysreg_get_master()); - vexpress_sysreg_dev = &pdev->dev; + /* Confirm board type against DT property, if available */ + if (of_property_read_u32(of_allnodes, "arm,hbi", &dt_hbi) == 0) { + u32 id = vexpress_get_procid(VEXPRESS_SITE_MASTER); + u32 hbi = (id >> SYS_PROCIDx_HBI_SHIFT) & SYS_HBI_MASK; -#ifdef CONFIG_GPIOLIB - vexpress_sysreg_gpio_chip.dev = &pdev->dev; - err = gpiochip_add(&vexpress_sysreg_gpio_chip); - if (err) { - vexpress_config_bridge_unregister( - vexpress_sysreg_config_bridge); - dev_err(&pdev->dev, "Failed to register GPIO chip! (%d)\n", - err); - return err; + if (WARN_ON(dt_hbi != hbi)) + dev_warn(&pdev->dev, "DT HBI (%x) is not matching hardware (%x)!\n", + dt_hbi, hbi); } - platform_device_register_data(vexpress_sysreg_dev, "leds-gpio", - PLATFORM_DEVID_AUTO, &vexpress_sysreg_leds_pdata, - sizeof(vexpress_sysreg_leds_pdata)); -#endif - - device_create_file(vexpress_sysreg_dev, &dev_attr_sys_id); - - return 0; + /* + * 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->gc.ngpio = 2; + gpiochip_add(&mmc_gpio_chip->gc); + + 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[] = { @@ -522,7 +265,12 @@ static struct platform_driver vexpress_sysreg_driver = { static int __init vexpress_sysreg_init(void) { - vexpress_sysreg_of_early_init(); + 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); |