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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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590b460c3e
Basic machine port for the Artpec-6 SoC from Axis Communications. Signed-off-by: Lars Persson <larper@axis.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Olof Johansson <olof@lixom.net>
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/*
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* ARTPEC-6 device support.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/amba/bus.h>
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#include <linux/clocksource.h>
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <linux/irqchip.h>
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#include <linux/irqchip/arm-gic.h>
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#include <linux/mfd/syscon.h>
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#include <linux/of_platform.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/clk-provider.h>
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#include <linux/regmap.h>
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#include <linux/smp.h>
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#include <asm/smp_scu.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/psci.h>
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#include <linux/arm-smccc.h>
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#define ARTPEC6_DMACFG_REGNUM 0x10
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#define ARTPEC6_DMACFG_UARTS_BURST 0xff
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#define SECURE_OP_L2C_WRITEREG 0xb4000001
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static void __init artpec6_init_machine(void)
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{
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struct regmap *regmap;
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regmap = syscon_regmap_lookup_by_compatible("axis,artpec6-syscon");
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if (!IS_ERR(regmap)) {
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/* Use PL011 DMA Burst Request signal instead of DMA
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* Single Request
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*/
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regmap_write(regmap, ARTPEC6_DMACFG_REGNUM,
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ARTPEC6_DMACFG_UARTS_BURST);
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};
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of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
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}
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static void artpec6_l2c310_write_sec(unsigned long val, unsigned reg)
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{
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struct arm_smccc_res res;
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arm_smccc_smc(SECURE_OP_L2C_WRITEREG, reg, val, 0,
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0, 0, 0, 0, &res);
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WARN_ON(res.a0);
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}
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static const char * const artpec6_dt_match[] = {
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"axis,artpec6",
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NULL
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};
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DT_MACHINE_START(ARTPEC6, "Axis ARTPEC-6 Platform")
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.l2c_aux_val = 0x0C000000,
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.l2c_aux_mask = 0xF3FFFFFF,
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.l2c_write_sec = artpec6_l2c310_write_sec,
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.init_machine = artpec6_init_machine,
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.dt_compat = artpec6_dt_match,
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MACHINE_END
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