Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* R8A7740 processor support
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*
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* Copyright (C) 2011 Renesas Solutions Corp.
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* Copyright (C) 2011 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*/
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#include <linux/kernel.h>
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#include <linux/init.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 <asm/mach/map.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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#include "common.h"
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/*
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* r8a7740 chip has lasting errata on MERAM buffer.
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* this is work-around for it.
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* see
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* "Media RAM (MERAM)" on r8a7740 documentation
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*/
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#define MEBUFCNTR 0xFE950098
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static void __init r8a7740_meram_workaround(void)
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{
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void __iomem *reg;
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reg = ioremap(MEBUFCNTR, 4);
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if (reg) {
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iowrite32(0x01600164, reg);
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iounmap(reg);
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}
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}
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static void __init r8a7740_init_irq_of(void)
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{
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void __iomem *intc_prio_base = ioremap(0xe6900010, 0x10);
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void __iomem *intc_msk_base = ioremap(0xe6900040, 0x10);
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void __iomem *pfc_inta_ctrl = ioremap(0xe605807c, 0x4);
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irqchip_init();
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/* route signals to GIC */
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iowrite32(0x0, pfc_inta_ctrl);
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/*
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* To mask the shared interrupt to SPI 149 we must ensure to set
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* PRIO *and* MASK. Else we run into IRQ floods when registering
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* the intc_irqpin devices
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*/
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iowrite32(0x0, intc_prio_base + 0x0);
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iowrite32(0x0, intc_prio_base + 0x4);
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iowrite32(0x0, intc_prio_base + 0x8);
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iowrite32(0x0, intc_prio_base + 0xc);
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iowrite8(0xff, intc_msk_base + 0x0);
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iowrite8(0xff, intc_msk_base + 0x4);
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iowrite8(0xff, intc_msk_base + 0x8);
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iowrite8(0xff, intc_msk_base + 0xc);
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iounmap(intc_prio_base);
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iounmap(intc_msk_base);
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iounmap(pfc_inta_ctrl);
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}
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static void __init r8a7740_generic_init(void)
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{
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r8a7740_meram_workaround();
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}
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static const char *const r8a7740_boards_compat_dt[] __initconst = {
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"renesas,r8a7740",
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NULL
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};
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DT_MACHINE_START(R8A7740_DT, "Generic R8A7740 (Flattened Device Tree)")
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.l2c_aux_val = 0,
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.l2c_aux_mask = ~0,
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.init_early = shmobile_init_delay,
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.init_irq = r8a7740_init_irq_of,
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.init_machine = r8a7740_generic_init,
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.init_late = shmobile_init_late,
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.dt_compat = r8a7740_boards_compat_dt,
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MACHINE_END
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