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a57ce78b37
* Bump to 4.18, removing the obvious, fixing build problems, put some on waiting. * Pin 4.18 to DEV, rollback 4.14 to NEXT, adjust configs, remove one deprecated patch from NEXT and add board-h3-address-some-stability-issues.patch * Adjust few boards in development to new reality, removing it from NEXT for now * Adjust few board configs * Board config adjustement * Adjust few boards configs * Port NeoCore2 and Neo21.1 to 4.14.y * Adjust board config * Adjust board config
88 lines
2.6 KiB
Diff
88 lines
2.6 KiB
Diff
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
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index d1c0b60e9326..1851112ccc29 100644
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--- a/drivers/bus/Kconfig
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+++ b/drivers/bus/Kconfig
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@@ -103,6 +103,16 @@ config SIMPLE_PM_BUS
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Controller (BSC, sometimes called "LBSC within Bus Bridge", or
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"External Bus Interface") as found on several Renesas ARM SoCs.
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+config SUN50I_DE2_BUS
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+ bool "Allwinner A64 DE2 Bus Driver"
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+ default ARM64
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+ depends on ARCH_SUNXI
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+ select SUNXI_SRAM
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+ help
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+ Say y here to enable support for Allwinner A64 DE2 bus driver. It's
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+ mostly transparent, but a SRAM region needs to be claimed in the SRAM
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+ controller to make the all blocks in the DE2 part accessible.
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+
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config SUNXI_RSB
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tristate "Allwinner sunXi Reduced Serial Bus Driver"
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default MACH_SUN8I || MACH_SUN9I || ARM64
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diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile
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index b8f036cca7ff..ca300b1914ce 100644
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--- a/drivers/bus/Makefile
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+++ b/drivers/bus/Makefile
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@@ -21,6 +21,7 @@ obj-$(CONFIG_OMAP_INTERCONNECT) += omap_l3_smx.o omap_l3_noc.o
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obj-$(CONFIG_OMAP_OCP2SCP) += omap-ocp2scp.o
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obj-$(CONFIG_QCOM_EBI2) += qcom-ebi2.o
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+obj-$(CONFIG_SUN50I_DE2_BUS) += sun50i-de2.o
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obj-$(CONFIG_SUNXI_RSB) += sunxi-rsb.o
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obj-$(CONFIG_SIMPLE_PM_BUS) += simple-pm-bus.o
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obj-$(CONFIG_TEGRA_ACONNECT) += tegra-aconnect.o
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diff --git a/drivers/bus/sun50i-de2.c b/drivers/bus/sun50i-de2.c
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new file mode 100644
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index 000000000000..836828ef96d5
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--- /dev/null
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+++ b/drivers/bus/sun50i-de2.c
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@@ -0,0 +1,49 @@
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+// SPDX-License-Identifier: GPL-2.0
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+/*
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+ * Allwinner A64 Display Engine 2.0 Bus Driver
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+ *
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+ * Copyright (C) 2018 Icenowy Zheng <icenowy@aosc.io>
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+ */
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+
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+#include <linux/of_platform.h>
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+#include <linux/platform_device.h>
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+#include <linux/soc/sunxi/sunxi_sram.h>
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+
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+static int sun50i_de2_bus_probe(struct platform_device *pdev)
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+{
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+ struct device_node *np = pdev->dev.of_node;
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+ int ret;
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+
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+ ret = sunxi_sram_claim(&pdev->dev);
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+ if (ret) {
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+ dev_err(&pdev->dev, "Error couldn't map SRAM to device\n");
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+ return ret;
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+ }
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+
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+ if (np)
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+ of_platform_populate(np, NULL, NULL, &pdev->dev);
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+
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+ return 0;
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+}
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+
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+static int sun50i_de2_bus_remove(struct platform_device *pdev)
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+{
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+ sunxi_sram_release(&pdev->dev);
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+ return 0;
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+}
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+
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+static const struct of_device_id sun50i_de2_bus_of_match[] = {
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+ { .compatible = "allwinner,sun50i-a64-de2", },
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+ { /* sentinel */ }
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+};
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+
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+static struct platform_driver sun50i_de2_bus_driver = {
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+ .probe = sun50i_de2_bus_probe,
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+ .remove = sun50i_de2_bus_remove,
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+ .driver = {
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+ .name = "sun50i-de2-bus",
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+ .of_match_table = sun50i_de2_bus_of_match,
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+ },
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+};
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+
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+builtin_platform_driver(sun50i_de2_bus_driver);
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