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authorAlexander Shiyan <shc_work@mail.ru>2014-08-19 08:31:15 -0400
committerArnd Bergmann <arnd@arndb.de>2014-09-04 15:40:43 -0400
commite4e3a37d3316332e02e06188dccf4401611e07b9 (patch)
treefe9093e794ced5ac1c2b853dc8840a1ed04c5584 /arch/arm/mach-clps711x
parente917ba44f8775e476079f2c163985eb9f49703e8 (diff)
ARM: clps711x: Add SOC BUS support
Add SOC BUS support with CPU family, machine name and unique ID. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-clps711x')
-rw-r--r--arch/arm/mach-clps711x/devices.c52
1 files changed, 51 insertions, 1 deletions
diff --git a/arch/arm/mach-clps711x/devices.c b/arch/arm/mach-clps711x/devices.c
index 0c689d3a6710..77a9617c216d 100644
--- a/arch/arm/mach-clps711x/devices.c
+++ b/arch/arm/mach-clps711x/devices.c
@@ -1,7 +1,7 @@
1/* 1/*
2 * CLPS711X common devices definitions 2 * CLPS711X common devices definitions
3 * 3 *
4 * Author: Alexander Shiyan <shc_work@mail.ru>, 2013 4 * Author: Alexander Shiyan <shc_work@mail.ru>, 2013-2014
5 * 5 *
6 * This program is free software; you can redistribute it and/or modify 6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by 7 * it under the terms of the GNU General Public License as published by
@@ -9,8 +9,15 @@
9 * (at your option) any later version. 9 * (at your option) any later version.
10 */ 10 */
11 11
12#include <linux/io.h>
13#include <linux/of_fdt.h>
12#include <linux/platform_device.h> 14#include <linux/platform_device.h>
15#include <linux/random.h>
13#include <linux/sizes.h> 16#include <linux/sizes.h>
17#include <linux/slab.h>
18#include <linux/sys_soc.h>
19
20#include <asm/system_info.h>
14 21
15#include <mach/hardware.h> 22#include <mach/hardware.h>
16 23
@@ -90,10 +97,53 @@ static void __init clps711x_add_uart(void)
90 ARRAY_SIZE(clps711x_uart2_res)); 97 ARRAY_SIZE(clps711x_uart2_res));
91}; 98};
92 99
100static void __init clps711x_soc_init(void)
101{
102 struct soc_device_attribute *soc_dev_attr;
103 struct soc_device *soc_dev;
104 void __iomem *base;
105 u32 id[5];
106
107 base = ioremap(CLPS711X_PHYS_BASE, SZ_32K);
108 if (!base)
109 return;
110
111 id[0] = readl(base + UNIQID);
112 id[1] = readl(base + RANDID0);
113 id[2] = readl(base + RANDID1);
114 id[3] = readl(base + RANDID2);
115 id[4] = readl(base + RANDID3);
116 system_rev = SYSFLG1_VERID(readl(base + SYSFLG1));
117
118 add_device_randomness(id, sizeof(id));
119
120 system_serial_low = id[0];
121
122 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
123 if (!soc_dev_attr)
124 goto out_unmap;
125
126 soc_dev_attr->machine = of_flat_dt_get_machine_name();
127 soc_dev_attr->family = "Cirrus Logic CLPS711X";
128 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%u", system_rev);
129 soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%08x", id[0]);
130
131 soc_dev = soc_device_register(soc_dev_attr);
132 if (IS_ERR(soc_dev)) {
133 kfree(soc_dev_attr->revision);
134 kfree(soc_dev_attr->soc_id);
135 kfree(soc_dev_attr);
136 }
137
138out_unmap:
139 iounmap(base);
140}
141
93void __init clps711x_devices_init(void) 142void __init clps711x_devices_init(void)
94{ 143{
95 clps711x_add_cpuidle(); 144 clps711x_add_cpuidle();
96 clps711x_add_gpio(); 145 clps711x_add_gpio();
97 clps711x_add_syscon(); 146 clps711x_add_syscon();
98 clps711x_add_uart(); 147 clps711x_add_uart();
148 clps711x_soc_init();
99} 149}