1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * ARTPEC-6 device support.
4 */
5
6#include <linux/amba/bus.h>
7#include <linux/clocksource.h>
8#include <linux/dma-mapping.h>
9#include <linux/io.h>
10#include <linux/irqchip.h>
11#include <linux/irqchip/arm-gic.h>
12#include <linux/mfd/syscon.h>
13#include <linux/of.h>
14#include <linux/of_address.h>
15#include <linux/clk-provider.h>
16#include <linux/regmap.h>
17#include <linux/smp.h>
18#include <asm/smp_scu.h>
19#include <asm/mach/arch.h>
20#include <asm/mach/map.h>
21#include <asm/psci.h>
22#include <linux/arm-smccc.h>
23
24
25#define ARTPEC6_DMACFG_REGNUM 0x10
26#define ARTPEC6_DMACFG_UARTS_BURST 0xff
27
28#define SECURE_OP_L2C_WRITEREG 0xb4000001
29
30static void __init artpec6_init_machine(void)
31{
32 struct regmap *regmap;
33
34 regmap = syscon_regmap_lookup_by_compatible(s: "axis,artpec6-syscon");
35
36 if (!IS_ERR(ptr: regmap)) {
37 /* Use PL011 DMA Burst Request signal instead of DMA
38 * Single Request
39 */
40 regmap_write(map: regmap, ARTPEC6_DMACFG_REGNUM,
41 ARTPEC6_DMACFG_UARTS_BURST);
42 };
43}
44
45static void artpec6_l2c310_write_sec(unsigned long val, unsigned reg)
46{
47 struct arm_smccc_res res;
48
49 arm_smccc_smc(SECURE_OP_L2C_WRITEREG, reg, val, 0,
50 0, 0, 0, 0, &res);
51
52 WARN_ON(res.a0);
53}
54
55static const char * const artpec6_dt_match[] = {
56 "axis,artpec6",
57 NULL
58};
59
60DT_MACHINE_START(ARTPEC6, "Axis ARTPEC-6 Platform")
61 .l2c_aux_val = 0x0C000000,
62 .l2c_aux_mask = 0xF3FFFFFF,
63 .l2c_write_sec = artpec6_l2c310_write_sec,
64 .init_machine = artpec6_init_machine,
65 .dt_compat = artpec6_dt_match,
66MACHINE_END
67

source code of linux/arch/arm/mach-artpec/board-artpec6.c