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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/soc/versatile/soc-realview.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/soc/versatile/soc-realview.c')
-rw-r--r-- | kernel/drivers/soc/versatile/soc-realview.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/kernel/drivers/soc/versatile/soc-realview.c b/kernel/drivers/soc/versatile/soc-realview.c new file mode 100644 index 000000000..1a07bf540 --- /dev/null +++ b/kernel/drivers/soc/versatile/soc-realview.c @@ -0,0 +1,145 @@ +/* + * Copyright (C) 2014 Linaro Ltd. + * + * Author: Linus Walleij <linus.walleij@linaro.org> + * + * 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. + * + */ +#include <linux/init.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/sys_soc.h> +#include <linux/platform_device.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> +#include <linux/of.h> + +/* System ID in syscon */ +#define REALVIEW_SYS_ID_OFFSET 0x00 + +static const struct of_device_id realview_soc_of_match[] = { + { .compatible = "arm,realview-eb-soc", }, + { .compatible = "arm,realview-pb1176-soc", }, + { .compatible = "arm,realview-pb11mp-soc", }, + { .compatible = "arm,realview-pba8-soc", }, + { .compatible = "arm,realview-pbx-soc", }, + { } +}; + +static u32 realview_coreid; + +static const char *realview_board_str(u32 id) +{ + switch ((id >> 16) & 0xfff) { + case 0x0147: + return "HBI-0147"; + default: + return "Unknown"; + } +} + +static const char *realview_arch_str(u32 id) +{ + switch ((id >> 8) & 0xf) { + case 0x05: + return "Multi-layer AXI"; + default: + return "Unknown"; + } +} + +static ssize_t realview_get_manf(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%02x\n", realview_coreid >> 24); +} + +static struct device_attribute realview_manf_attr = + __ATTR(manufacturer, S_IRUGO, realview_get_manf, NULL); + +static ssize_t realview_get_board(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%s\n", realview_board_str(realview_coreid)); +} + +static struct device_attribute realview_board_attr = + __ATTR(board, S_IRUGO, realview_get_board, NULL); + +static ssize_t realview_get_arch(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%s\n", realview_arch_str(realview_coreid)); +} + +static struct device_attribute realview_arch_attr = + __ATTR(fpga, S_IRUGO, realview_get_arch, NULL); + +static ssize_t realview_get_build(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%02x\n", (realview_coreid & 0xFF)); +} + +static struct device_attribute realview_build_attr = + __ATTR(build, S_IRUGO, realview_get_build, NULL); + +static int realview_soc_probe(struct platform_device *pdev) +{ + static struct regmap *syscon_regmap; + struct soc_device *soc_dev; + struct soc_device_attribute *soc_dev_attr; + struct device_node *np = pdev->dev.of_node; + int ret; + + syscon_regmap = syscon_regmap_lookup_by_phandle(np, "regmap"); + if (IS_ERR(syscon_regmap)) + return PTR_ERR(syscon_regmap); + + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (!soc_dev_attr) + return -ENOMEM; + + ret = of_property_read_string(np, "compatible", + &soc_dev_attr->soc_id); + if (ret) + return -EINVAL; + + soc_dev_attr->machine = "RealView"; + soc_dev_attr->family = "Versatile"; + soc_dev = soc_device_register(soc_dev_attr); + if (IS_ERR(soc_dev)) { + kfree(soc_dev_attr); + return -ENODEV; + } + ret = regmap_read(syscon_regmap, REALVIEW_SYS_ID_OFFSET, + &realview_coreid); + if (ret) + return -ENODEV; + + device_create_file(soc_device_to_device(soc_dev), &realview_manf_attr); + device_create_file(soc_device_to_device(soc_dev), &realview_board_attr); + device_create_file(soc_device_to_device(soc_dev), &realview_arch_attr); + device_create_file(soc_device_to_device(soc_dev), &realview_build_attr); + + dev_info(&pdev->dev, "RealView Syscon Core ID: 0x%08x\n", + realview_coreid); + /* FIXME: add attributes for SoC to sysfs */ + return 0; +} + +static struct platform_driver realview_soc_driver = { + .probe = realview_soc_probe, + .driver = { + .name = "realview-soc", + .of_match_table = realview_soc_of_match, + }, +}; +module_platform_driver(realview_soc_driver); |