| /* |
| * 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.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); |
| }; |
| } |
| |
| 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 |