Common base to export System-on-Chip related informations through sysfs. Creation of a "soc" directory under /sys/devices/system/. Creation of a common "mach_name" entry to export machine name. Creation of platform-defined SoC information entries.
Signed-off-by: Maxime COQUELIN <[email protected]> --- drivers/base/Kconfig | 4 ++ drivers/base/Makefile | 1 + drivers/base/soc.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++ include/linux/sys_soc.h | 33 +++++++++++++++++ 4 files changed, 126 insertions(+), 0 deletions(-) create mode 100644 drivers/base/soc.c create mode 100644 include/linux/sys_soc.h diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index d57e8d0..4f2b56d 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -168,4 +168,8 @@ config SYS_HYPERVISOR bool default n +config SYS_SOC + bool "Export SoC specific informations" + depends on EMBEDDED + endmenu diff --git a/drivers/base/Makefile b/drivers/base/Makefile index 5f51c3b..f3bcfb3 100644 --- a/drivers/base/Makefile +++ b/drivers/base/Makefile @@ -18,6 +18,7 @@ ifeq ($(CONFIG_SYSFS),y) obj-$(CONFIG_MODULES) += module.o endif obj-$(CONFIG_SYS_HYPERVISOR) += hypervisor.o +obj-$(CONFIG_SYS_SOC) += soc.o ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG diff --git a/drivers/base/soc.c b/drivers/base/soc.c new file mode 100644 index 0000000..6fa538b --- /dev/null +++ b/drivers/base/soc.c @@ -0,0 +1,88 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * Author: Maxime Coquelin <[email protected]> for ST-Ericsson. + * License terms: GNU General Public License (GPL), version 2 + */ + +#include <linux/sysdev.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/stat.h> +#include <linux/slab.h> +#include <linux/sys_soc.h> + +static struct sysdev_class_attribute *soc_default_attrs[]; + +struct sys_soc { + char *mach_name; + struct sysdev_class class; +}; + +struct sys_soc soc = { + .class = { + .name = "soc", + .attrs = soc_default_attrs, + }, +}; + +static ssize_t show_mach_name(struct sysdev_class *class, + struct sysdev_class_attribute *attr, char *buf) +{ + return sprintf(buf, "%s\n", soc.mach_name); +} +static SYSDEV_CLASS_ATTR(mach_name, S_IRUGO, show_mach_name, NULL); + +static ssize_t show_info(struct sysdev_class *class, + struct sysdev_class_attribute *attr, char *buf) +{ + struct sys_soc_info *si = container_of(attr, + struct sys_soc_info, attr); + + if (si->info) + return sprintf(buf, "%s\n", si->info); + else if (si->get_info) + return sprintf(buf, "%s\n", si->get_info(si)); + else + return sprintf(buf, "No data\n"); +} + +void __init register_sys_soc_info(struct sys_soc_info *info, int nb_info) +{ + int i; + + for (i = 0; i < nb_info; i++) { + info[i].attr.attr.name = info[i].name; + info[i].attr.attr.mode = S_IRUGO; + info[i].attr.show = show_info; + + sysdev_class_create_file(&soc.class, &info[i].attr); + } +} + +void __init register_sys_soc(char *name, struct sys_soc_info *info, int num) +{ + int len; + + len = strlen(name); + soc.mach_name = kzalloc(len + 1, GFP_KERNEL); + if (!soc.mach_name) + return; + + sprintf(soc.mach_name, "%s", name); + + if (sysdev_class_register(&soc.class)) { + kfree(soc.mach_name); + return; + } + + register_sys_soc_info(info, num); +} + +/* + * Common attributes for all platforms. + * Only machine name for now + */ +static struct sysdev_class_attribute *soc_default_attrs[] = { + &attr_mach_name, + NULL +}; diff --git a/include/linux/sys_soc.h b/include/linux/sys_soc.h new file mode 100644 index 0000000..b91a924 --- /dev/null +++ b/include/linux/sys_soc.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) ST-Ericsson SA 2011 + * Author: Maxime Coquelin <[email protected]> for ST-Ericsson. + * License terms: GNU General Public License (GPL), version 2 + */ +#ifndef __SYS_SOC_H +#define __SYS_SOC_H + +#include <linux/sysdev.h> + +/** + * struct sys_soc_info - SoC exports related informations + * @name: name of the export + * @info: pointer on the key to export + * @get_info: callback to retrieve key if info field is NULL + * @attr: export's sysdev class attribute + */ +struct sys_soc_info { + char *name; + char *info; + char *(*get_info)(struct sys_soc_info *); + struct sysdev_class_attribute attr; +}; + +/** + * void register_sys_soc(char *name, struct sys_soc_info *, int num) + * @name: name of the machine + * @info: pointer on the info table to export + * @num: number of info to export + */ +void register_sys_soc(char *name, struct sys_soc_info *info, int num); + +#endif /* __SYS_SOC_H */ -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
