From: Lee Jones Date: Mon, 6 Feb 2012 19:22:24 +0000 (-0800) Subject: ARM: ux500: export System-on-Chip information ux500 via sysfs X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=eda413c228e227d888bc13d210e7c4c6aa62a682;p=linux-beck.git ARM: ux500: export System-on-Chip information ux500 via sysfs Here we make use of the new System-On-Chip bus driver to export vital SoC information out to userspace via sysfs. This patch provides a data structure of strings to populate the base nodes found in: /sys/devices/soc[0|1|2|...]/[family|machine|revision|soc_id]. It also adds one more node as requested by ST-Ericsson. 'process' depicts the way in which the silicon was manufactured. Signed-off-by: Lee Jones Acked-by: Linus Walleij Signed-off-by: Arnd Bergmann --- diff --git a/arch/arm/mach-ux500/Kconfig b/arch/arm/mach-ux500/Kconfig index 52af00446a63..5cfa5390e0fd 100644 --- a/arch/arm/mach-ux500/Kconfig +++ b/arch/arm/mach-ux500/Kconfig @@ -28,6 +28,7 @@ config MACH_U8500 bool "U8500 Development platform" depends on UX500_SOC_DB8500 select TPS6105X + select SOC_BUS help Include support for the mop500 development platform. diff --git a/arch/arm/mach-ux500/cpu-db5500.c b/arch/arm/mach-ux500/cpu-db5500.c index c402fd6efe53..8f8acfdd4a1b 100644 --- a/arch/arm/mach-ux500/cpu-db5500.c +++ b/arch/arm/mach-ux500/cpu-db5500.c @@ -212,18 +212,32 @@ static int usb_db5500_tx_dma_cfg[] = { DB5500_DMA_DEV38_USB_OTG_OEP_8 }; -struct device* __init u5500_init_devices(void) +static const char *db5500_read_soc_id(void) { - /* FIXME: First parameter to be a real parent. */ - db5500_add_gpios(NULL); + return kasprintf(GFP_KERNEL, "u5500 currently unsupported\n"); +} + +static struct device * __init db5500_soc_device_init(void) +{ + const char *soc_id = db5500_read_soc_id(); + + return ux500_soc_device_init(soc_id); +} + +struct device * __init u5500_init_devices(void) +{ + struct device *parent; + + parent = db5500_soc_device_init(); + + db5500_add_gpios(parent); db5500_pmu_init(); - db5500_dma_init(NULL); - db5500_add_rtc(NULL); - db5500_add_usb(NULL, usb_db5500_rx_dma_cfg, usb_db5500_tx_dma_cfg); + db5500_dma_init(parent); + db5500_add_rtc(parent); + db5500_add_usb(parent, usb_db5500_rx_dma_cfg, usb_db5500_tx_dma_cfg); platform_add_devices(db5500_platform_devs, ARRAY_SIZE(db5500_platform_devs)); - /* FIXME: Return value to be a real parent. */ - return NULL; + return parent; } diff --git a/arch/arm/mach-ux500/cpu-db8500.c b/arch/arm/mach-ux500/cpu-db8500.c index 1e8a2cb7e503..afcde3df71d7 100644 --- a/arch/arm/mach-ux500/cpu-db8500.c +++ b/arch/arm/mach-ux500/cpu-db8500.c @@ -24,6 +24,7 @@ #include #include #include +#include #include "devices-db8500.h" #include "ste-dma40-db8500.h" @@ -164,18 +165,38 @@ static int usb_db8500_tx_dma_cfg[] = { DB8500_DMA_DEV39_USB_OTG_OEP_8 }; +static const char *db8500_read_soc_id(void) +{ + void __iomem *uid = __io_address(U8500_BB_UID_BASE); + + return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x", + readl((u32 *)uid+1), + readl((u32 *)uid+1), readl((u32 *)uid+2), + readl((u32 *)uid+3), readl((u32 *)uid+4)); +} + +static struct device * __init db8500_soc_device_init(void) +{ + const char *soc_id = db8500_read_soc_id(); + + return ux500_soc_device_init(soc_id); +} + /* * This function is called from the board init */ -struct device* __init u8500_init_devices(void) +struct device * __init u8500_init_devices(void) { - db8500_add_rtc(NULL); - db8500_add_gpios(NULL); - db8500_add_usb(NULL, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg); + struct device *parent; + + parent = db8500_soc_device_init(); + + db8500_add_rtc(parent); + db8500_add_gpios(parent); + db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg); platform_device_register_simple("cpufreq-u8500", -1, NULL, 0); platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs)); - /* FIXME: Return value to be a real parent. */ - return NULL; + return parent; } diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c index f41857494375..055fb6e16ee2 100644 --- a/arch/arm/mach-ux500/cpu.c +++ b/arch/arm/mach-ux500/cpu.c @@ -2,6 +2,7 @@ * Copyright (C) ST-Ericsson SA 2010 * * Author: Rabin Vincent for ST-Ericsson + * Author: Lee Jones for ST-Ericsson * License terms: GNU General Public License (GPL) version 2 */ @@ -11,6 +12,10 @@ #include #include #include +#include +#include +#include +#include #include #include @@ -50,3 +55,73 @@ void __init ux500_init_irq(void) db8500_prcmu_early_init(); clk_init(); } + +static const char * __init ux500_get_machine(void) +{ + return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber()); +} + +static const char * __init ux500_get_family(void) +{ + return kasprintf(GFP_KERNEL, "ux500"); +} + +static const char * __init ux500_get_revision(void) +{ + unsigned int rev = dbx500_revision(); + + if (rev == 0x01) + return kasprintf(GFP_KERNEL, "%s", "ED"); + else if (rev >= 0xA0) + return kasprintf(GFP_KERNEL, "%d.%d", + (rev >> 4) - 0xA + 1, rev & 0xf); + + return kasprintf(GFP_KERNEL, "%s", "Unknown"); +} + +static ssize_t ux500_get_process(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + if (dbx500_id.process == 0x00) + return sprintf(buf, "Standard\n"); + + return sprintf(buf, "%02xnm\n", dbx500_id.process); +} + +static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr, + const char *soc_id) +{ + soc_dev_attr->soc_id = soc_id; + soc_dev_attr->machine = ux500_get_machine(); + soc_dev_attr->family = ux500_get_family(); + soc_dev_attr->revision = ux500_get_revision(); +} + +struct device_attribute ux500_soc_attr = + __ATTR(process, S_IRUGO, ux500_get_process, NULL); + +struct device * __init ux500_soc_device_init(const char *soc_id) +{ + struct device *parent; + struct soc_device *soc_dev; + struct soc_device_attribute *soc_dev_attr; + + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (!soc_dev_attr) + return ERR_PTR(-ENOMEM); + + soc_info_populate(soc_dev_attr, soc_id); + + soc_dev = soc_device_register(soc_dev_attr); + if (IS_ERR_OR_NULL(soc_dev)) { + kfree(soc_dev_attr); + return NULL; + } + + parent = soc_device_to_device(soc_dev); + if (!IS_ERR_OR_NULL(parent)) + device_create_file(parent, &ux500_soc_attr); + + return parent; +} diff --git a/arch/arm/mach-ux500/include/mach/db8500-regs.h b/arch/arm/mach-ux500/include/mach/db8500-regs.h index 80e10f50282e..9ec20b96d8f2 100644 --- a/arch/arm/mach-ux500/include/mach/db8500-regs.h +++ b/arch/arm/mach-ux500/include/mach/db8500-regs.h @@ -161,4 +161,7 @@ #define U8500_MODEM_BASE 0xe000000 #define U8500_APE_BASE 0x6000000 +/* SoC identification number information */ +#define U8500_BB_UID_BASE (U8500_BACKUPRAM1_BASE + 0xFC0) + #endif diff --git a/arch/arm/mach-ux500/include/mach/setup.h b/arch/arm/mach-ux500/include/mach/setup.h index e46b8b12056d..74b43bb74542 100644 --- a/arch/arm/mach-ux500/include/mach/setup.h +++ b/arch/arm/mach-ux500/include/mach/setup.h @@ -27,6 +27,8 @@ extern void __init u5500_sdi_init(struct device *parent); extern void __init db5500_dma_init(struct device *parent); +extern struct device *ux500_soc_device_init(const char *soc_id); + /* We re-use nomadik_timer for this platform */ extern void nmdk_timer_init(void);