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 <lee.jones@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>hifive-unleashed-5.1
Lee Jones
Arnd Bergmann
parent
18403424c4
commit
eda413c228
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@ -28,6 +28,7 @@ config MACH_U8500
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bool "U8500 Development platform"
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depends on UX500_SOC_DB8500
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select TPS6105X
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select SOC_BUS
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help
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Include support for the mop500 development platform.
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@ -212,18 +212,32 @@ static int usb_db5500_tx_dma_cfg[] = {
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DB5500_DMA_DEV38_USB_OTG_OEP_8
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};
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struct device* __init u5500_init_devices(void)
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static const char *db5500_read_soc_id(void)
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{
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/* FIXME: First parameter to be a real parent. */
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db5500_add_gpios(NULL);
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return kasprintf(GFP_KERNEL, "u5500 currently unsupported\n");
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}
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static struct device * __init db5500_soc_device_init(void)
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{
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const char *soc_id = db5500_read_soc_id();
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return ux500_soc_device_init(soc_id);
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}
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struct device * __init u5500_init_devices(void)
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{
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struct device *parent;
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parent = db5500_soc_device_init();
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db5500_add_gpios(parent);
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db5500_pmu_init();
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db5500_dma_init(NULL);
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db5500_add_rtc(NULL);
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db5500_add_usb(NULL, usb_db5500_rx_dma_cfg, usb_db5500_tx_dma_cfg);
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db5500_dma_init(parent);
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db5500_add_rtc(parent);
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db5500_add_usb(parent, usb_db5500_rx_dma_cfg, usb_db5500_tx_dma_cfg);
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platform_add_devices(db5500_platform_devs,
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ARRAY_SIZE(db5500_platform_devs));
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/* FIXME: Return value to be a real parent. */
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return NULL;
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return parent;
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}
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@ -24,6 +24,7 @@
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#include <mach/setup.h>
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#include <mach/devices.h>
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#include <mach/usb.h>
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#include <mach/db8500-regs.h>
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#include "devices-db8500.h"
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#include "ste-dma40-db8500.h"
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@ -164,18 +165,38 @@ static int usb_db8500_tx_dma_cfg[] = {
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DB8500_DMA_DEV39_USB_OTG_OEP_8
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};
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static const char *db8500_read_soc_id(void)
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{
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void __iomem *uid = __io_address(U8500_BB_UID_BASE);
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return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
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readl((u32 *)uid+1),
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readl((u32 *)uid+1), readl((u32 *)uid+2),
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readl((u32 *)uid+3), readl((u32 *)uid+4));
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}
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static struct device * __init db8500_soc_device_init(void)
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{
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const char *soc_id = db8500_read_soc_id();
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return ux500_soc_device_init(soc_id);
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}
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/*
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* This function is called from the board init
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*/
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struct device* __init u8500_init_devices(void)
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struct device * __init u8500_init_devices(void)
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{
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db8500_add_rtc(NULL);
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db8500_add_gpios(NULL);
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db8500_add_usb(NULL, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
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struct device *parent;
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parent = db8500_soc_device_init();
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db8500_add_rtc(parent);
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db8500_add_gpios(parent);
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db8500_add_usb(parent, usb_db8500_rx_dma_cfg, usb_db8500_tx_dma_cfg);
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platform_device_register_simple("cpufreq-u8500", -1, NULL, 0);
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platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
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/* FIXME: Return value to be a real parent. */
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return NULL;
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return parent;
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}
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@ -2,6 +2,7 @@
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* Copyright (C) ST-Ericsson SA 2010
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*
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* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
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* Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson
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* License terms: GNU General Public License (GPL) version 2
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*/
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@ -11,6 +12,10 @@
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#include <linux/mfd/db8500-prcmu.h>
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#include <linux/mfd/db5500-prcmu.h>
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#include <linux/clksrc-dbx500-prcmu.h>
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#include <linux/sys_soc.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <asm/hardware/gic.h>
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#include <asm/mach/map.h>
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@ -50,3 +55,73 @@ void __init ux500_init_irq(void)
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db8500_prcmu_early_init();
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clk_init();
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}
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static const char * __init ux500_get_machine(void)
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{
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return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
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}
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static const char * __init ux500_get_family(void)
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{
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return kasprintf(GFP_KERNEL, "ux500");
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}
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static const char * __init ux500_get_revision(void)
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{
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unsigned int rev = dbx500_revision();
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if (rev == 0x01)
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return kasprintf(GFP_KERNEL, "%s", "ED");
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else if (rev >= 0xA0)
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return kasprintf(GFP_KERNEL, "%d.%d",
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(rev >> 4) - 0xA + 1, rev & 0xf);
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return kasprintf(GFP_KERNEL, "%s", "Unknown");
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}
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static ssize_t ux500_get_process(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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if (dbx500_id.process == 0x00)
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return sprintf(buf, "Standard\n");
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return sprintf(buf, "%02xnm\n", dbx500_id.process);
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}
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static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr,
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const char *soc_id)
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{
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soc_dev_attr->soc_id = soc_id;
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soc_dev_attr->machine = ux500_get_machine();
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soc_dev_attr->family = ux500_get_family();
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soc_dev_attr->revision = ux500_get_revision();
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}
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struct device_attribute ux500_soc_attr =
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__ATTR(process, S_IRUGO, ux500_get_process, NULL);
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struct device * __init ux500_soc_device_init(const char *soc_id)
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{
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struct device *parent;
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struct soc_device *soc_dev;
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struct soc_device_attribute *soc_dev_attr;
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soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
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if (!soc_dev_attr)
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return ERR_PTR(-ENOMEM);
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soc_info_populate(soc_dev_attr, soc_id);
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soc_dev = soc_device_register(soc_dev_attr);
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if (IS_ERR_OR_NULL(soc_dev)) {
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kfree(soc_dev_attr);
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return NULL;
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}
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parent = soc_device_to_device(soc_dev);
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if (!IS_ERR_OR_NULL(parent))
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device_create_file(parent, &ux500_soc_attr);
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return parent;
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}
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@ -161,4 +161,7 @@
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#define U8500_MODEM_BASE 0xe000000
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#define U8500_APE_BASE 0x6000000
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/* SoC identification number information */
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#define U8500_BB_UID_BASE (U8500_BACKUPRAM1_BASE + 0xFC0)
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#endif
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@ -27,6 +27,8 @@ extern void __init u5500_sdi_init(struct device *parent);
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extern void __init db5500_dma_init(struct device *parent);
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extern struct device *ux500_soc_device_init(const char *soc_id);
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/* We re-use nomadik_timer for this platform */
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extern void nmdk_timer_init(void);
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