// SPDX-License-Identifier: GPL-2.0-only /* * ARTPEC-6 device support. */ #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