diff options
Diffstat (limited to 'drivers/soc/bcm/brcmstb/common.c')
| -rw-r--r-- | drivers/soc/bcm/brcmstb/common.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/soc/bcm/brcmstb/common.c b/drivers/soc/bcm/brcmstb/common.c new file mode 100644 index 000000000..bf9123f72 --- /dev/null +++ b/drivers/soc/bcm/brcmstb/common.c @@ -0,0 +1,143 @@ +/* + * Copyright © 2014 NVIDIA Corporation + * Copyright © 2015 Broadcom Corporation + * + * 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. + */ + +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/slab.h> +#include <linux/soc/brcmstb/brcmstb.h> +#include <linux/sys_soc.h> + +#include <soc/brcmstb/common.h> + +static u32 family_id; +static u32 product_id; + +static const struct of_device_id brcmstb_machine_match[] = { + { .compatible = "brcm,brcmstb", }, + { } +}; + +bool soc_is_brcmstb(void) +{ + const struct of_device_id *match; + struct device_node *root; + + root = of_find_node_by_path("/"); + if (!root) + return false; + + match = of_match_node(brcmstb_machine_match, root); + of_node_put(root); + + return match != NULL; +} + +u32 brcmstb_get_family_id(void) +{ + return family_id; +} +EXPORT_SYMBOL(brcmstb_get_family_id); + +u32 brcmstb_get_product_id(void) +{ + return product_id; +} +EXPORT_SYMBOL(brcmstb_get_product_id); + +static const struct of_device_id sun_top_ctrl_match[] = { + { .compatible = "brcm,bcm7125-sun-top-ctrl", }, + { .compatible = "brcm,bcm7346-sun-top-ctrl", }, + { .compatible = "brcm,bcm7358-sun-top-ctrl", }, + { .compatible = "brcm,bcm7360-sun-top-ctrl", }, + { .compatible = "brcm,bcm7362-sun-top-ctrl", }, + { .compatible = "brcm,bcm7420-sun-top-ctrl", }, + { .compatible = "brcm,bcm7425-sun-top-ctrl", }, + { .compatible = "brcm,bcm7429-sun-top-ctrl", }, + { .compatible = "brcm,bcm7435-sun-top-ctrl", }, + { .compatible = "brcm,brcmstb-sun-top-ctrl", }, + { } +}; + +static int __init brcmstb_soc_device_early_init(void) +{ + struct device_node *sun_top_ctrl; + void __iomem *sun_top_ctrl_base; + int ret = 0; + + /* We could be on a multi-platform kernel, don't make this fatal but + * bail out early + */ + sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match); + if (!sun_top_ctrl) + return ret; + + sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0); + if (!sun_top_ctrl_base) { + ret = -ENODEV; + goto out; + } + + family_id = readl(sun_top_ctrl_base); + product_id = readl(sun_top_ctrl_base + 0x4); + iounmap(sun_top_ctrl_base); +out: + of_node_put(sun_top_ctrl); + return ret; +} +early_initcall(brcmstb_soc_device_early_init); + +static int __init brcmstb_soc_device_init(void) +{ + struct soc_device_attribute *soc_dev_attr; + struct device_node *sun_top_ctrl; + struct soc_device *soc_dev; + int ret = 0; + + /* We could be on a multi-platform kernel, don't make this fatal but + * bail out early + */ + sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match); + if (!sun_top_ctrl) + return ret; + + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (!soc_dev_attr) { + ret = -ENOMEM; + goto out; + } + + soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x", + family_id >> 28 ? + family_id >> 16 : family_id >> 8); + soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x", + product_id >> 28 ? + product_id >> 16 : product_id >> 8); + soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d", + ((product_id & 0xf0) >> 4) + 'A', + product_id & 0xf); + + soc_dev = soc_device_register(soc_dev_attr); + if (IS_ERR(soc_dev)) { + kfree(soc_dev_attr->family); + kfree(soc_dev_attr->soc_id); + kfree(soc_dev_attr->revision); + kfree(soc_dev_attr); + ret = -ENOMEM; + } +out: + of_node_put(sun_top_ctrl); + return ret; +} +arch_initcall(brcmstb_soc_device_init); |