mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 10:36:55 +07:00
8818e865aa
The "Display Engine 2.0" (usually called DE2) on the Allwinner A64 SoC is different from the ones on other Allwinner SoCs. It requires a SRAM region to be claimed, otherwise all DE2 subblocks won't be accessible. Add a bus driver for the Allwinner A64 DE2 part which claims the SRAM region when probing. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Allwinner A64 Display Engine 2.0 Bus Driver
|
|
*
|
|
* Copyright (C) 2018 Icenowy Zheng <icenowy@aosc.io>
|
|
*/
|
|
|
|
#include <linux/of_platform.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/soc/sunxi/sunxi_sram.h>
|
|
|
|
static int sun50i_de2_bus_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
int ret;
|
|
|
|
ret = sunxi_sram_claim(&pdev->dev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Error couldn't map SRAM to device\n");
|
|
return ret;
|
|
}
|
|
|
|
of_platform_populate(np, NULL, NULL, &pdev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sun50i_de2_bus_remove(struct platform_device *pdev)
|
|
{
|
|
sunxi_sram_release(&pdev->dev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id sun50i_de2_bus_of_match[] = {
|
|
{ .compatible = "allwinner,sun50i-a64-de2", },
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
static struct platform_driver sun50i_de2_bus_driver = {
|
|
.probe = sun50i_de2_bus_probe,
|
|
.remove = sun50i_de2_bus_remove,
|
|
.driver = {
|
|
.name = "sun50i-de2-bus",
|
|
.of_match_table = sun50i_de2_bus_of_match,
|
|
},
|
|
};
|
|
|
|
builtin_platform_driver(sun50i_de2_bus_driver);
|