1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* ARTPEC-6 device support.
*
* 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/amba/bus.h>
#include <linux/clocksource.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/irqchip.h>
#include <linux/irqchip/arm-gic.h>
#include <linux/mfd/syscon.h>
#include <linux/of_platform.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/clk-provider.h>
#include <linux/regmap.h>
#include <linux/smp.h>
#include <asm/smp_scu.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/psci.h>
#include <linux/arm-smccc.h>
#define ARTPEC6_DMACFG_REGNUM 0x10
#define ARTPEC6_DMACFG_UARTS_BURST 0xff
#define SECURE_OP_L2C_WRITEREG 0xb4000001
static void __init artpec6_init_machine(void)
{
struct regmap *regmap;
regmap = syscon_regmap_lookup_by_compatible("axis,artpec6-syscon");
if (!IS_ERR(regmap)) {
/* Use PL011 DMA Burst Request signal instead of DMA
* Single Request
*/
regmap_write(regmap, ARTPEC6_DMACFG_REGNUM,
ARTPEC6_DMACFG_UARTS_BURST);
};
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
static void artpec6_l2c310_write_sec(unsigned long val, unsigned reg)
{
struct arm_smccc_res res;
arm_smccc_smc(SECURE_OP_L2C_WRITEREG, reg, val, 0,
0, 0, 0, 0, &res);
WARN_ON(res.a0);
}
static const char * const artpec6_dt_match[] = {
"axis,artpec6",
NULL
};
DT_MACHINE_START(ARTPEC6, "Axis ARTPEC-6 Platform")
.l2c_aux_val = 0x0C000000,
.l2c_aux_mask = 0xF3FFFFFF,
.l2c_write_sec = artpec6_l2c310_write_sec,
.init_machine = artpec6_init_machine,
.dt_compat = artpec6_dt_match,
MACHINE_END
|
