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56f295853f
Register the "qemu-virt-ctrl" platform device during board initialization to utilize the new generic power/reset driver. Consequently, remove the legacy reset and power-off implementations specific to the virt machine. The platform's mach_reset callback is updated to call do_kernel_restart(), bridging the legacy m68k reboot path to the generic kernel restart handler framework for this machine. To prevent any regressions in reboot or power-off functionality when the driver is not built-in, explicitly select POWER_RESET and POWER_RESET_QEMU_VIRT_CTRL for the VIRT machine in Kconfig.machine. Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Link: https://patch.msgid.link/20260412211952.3564033-3-visitorckw@gmail.com Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/memblock.h>
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#include <asm/virt.h>
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#include <asm/irq.h>
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#define VIRTIO_BUS_NB 128
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static struct platform_device * __init virt_virtio_init(unsigned int id)
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{
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const struct resource res[] = {
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DEFINE_RES_MEM(virt_bi_data.virtio.mmio + id * 0x200, 0x200),
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DEFINE_RES_IRQ(virt_bi_data.virtio.irq + id),
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};
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return platform_device_register_simple("virtio-mmio", id,
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res, ARRAY_SIZE(res));
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}
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static int __init virt_platform_init(void)
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{
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const struct resource goldfish_tty_res[] = {
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DEFINE_RES_MEM(virt_bi_data.tty.mmio, 1),
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DEFINE_RES_IRQ(virt_bi_data.tty.irq),
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};
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/* this is the second gf-rtc, the first one is used by the scheduler */
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const struct resource goldfish_rtc_res[] = {
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DEFINE_RES_MEM(virt_bi_data.rtc.mmio + 0x1000, 0x1000),
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DEFINE_RES_IRQ(virt_bi_data.rtc.irq + 1),
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};
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const struct resource virt_ctrl_res[] = {
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DEFINE_RES_MEM(virt_bi_data.ctrl.mmio, 0x100),
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};
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struct platform_device *pdev1, *pdev2, *pdev3;
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struct platform_device *pdevs[VIRTIO_BUS_NB];
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unsigned int i;
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int ret = 0;
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if (!MACH_IS_VIRT)
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return -ENODEV;
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/* We need this to have DMA'able memory provided to goldfish-tty */
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min_low_pfn = 0;
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pdev1 = platform_device_register_simple("goldfish_tty",
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PLATFORM_DEVID_NONE,
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goldfish_tty_res,
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ARRAY_SIZE(goldfish_tty_res));
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if (IS_ERR(pdev1))
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return PTR_ERR(pdev1);
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pdev2 = platform_device_register_simple("goldfish_rtc",
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PLATFORM_DEVID_NONE,
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goldfish_rtc_res,
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ARRAY_SIZE(goldfish_rtc_res));
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if (IS_ERR(pdev2)) {
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ret = PTR_ERR(pdev2);
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goto err_unregister_tty;
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}
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pdev3 = platform_device_register_simple("qemu-virt-ctrl",
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PLATFORM_DEVID_NONE,
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virt_ctrl_res,
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ARRAY_SIZE(virt_ctrl_res));
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if (IS_ERR(pdev3)) {
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ret = PTR_ERR(pdev3);
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goto err_unregister_rtc;
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}
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for (i = 0; i < VIRTIO_BUS_NB; i++) {
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pdevs[i] = virt_virtio_init(i);
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if (IS_ERR(pdevs[i])) {
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ret = PTR_ERR(pdevs[i]);
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goto err_unregister_virtio;
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}
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}
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return 0;
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err_unregister_virtio:
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while (i > 0)
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platform_device_unregister(pdevs[--i]);
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platform_device_unregister(pdev3);
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err_unregister_rtc:
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platform_device_unregister(pdev2);
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err_unregister_tty:
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platform_device_unregister(pdev1);
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return ret;
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}
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arch_initcall(virt_platform_init);
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