// 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