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author | 2018-07-26 00:09:43 -0700 | |
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committer | 2018-07-26 00:09:43 -0700 | |
commit | 92f06c384b4950d1fc9e7177dd722a45c28a07f9 (patch) | |
tree | 49f09b99c44b8b266251e27c2b1e83e3f847bcf4 /drivers/bus/sun50i-de2.c | |
parent | Merge tag 'qcom-drivers-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into next/drivers (diff) | |
parent | soc: sunxi: Add the A13, A23 and H3 system control compatibles (diff) | |
download | linux-dev-92f06c384b4950d1fc9e7177dd722a45c28a07f9.tar.xz linux-dev-92f06c384b4950d1fc9e7177dd722a45c28a07f9.zip |
Merge tag 'sunxi-drivers-for-4.19' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into next/drivers
Allwinner drivers changes for 4.19
There's been work for this release cycles in both the SRAM controller
driver in order to support more SoCs, as part of our VPU work, but also to
enable the EMAC on the A64 (that needs to poke at registers within the same
register space).
Some work has been needed too to represent the bus to the display engine
controllers that all need an SRAM to be mapped to the CPU to be able to
access those controllers' registers.
* tag 'sunxi-drivers-for-4.19' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
soc: sunxi: Add the A13, A23 and H3 system control compatibles
drivers: soc: sunxi: Add support for the C1 SRAM region
dt-bindings: sram: sunxi: Populate valid sections compatibles
dt-bindings: sram: sunxi: Add A13, A20, A23 and H3 dedicated bindings
soc: sunxi: sram: Add dt match for the A10 system-control compatible
dt-bindings: sram: sunxi: Introduce new A10 binding for system-control
bus: add bus driver for accessing Allwinner A64 DE2
dt-bindings: add binding for the Allwinner A64 DE2 bus
soc: sunxi: sram: Add updated compatible string for A64 system control
dt-bindings: sram: Rename A64 SRAM controller compatible
soc: sunxi: export a regmap for EMAC clock reg on A64
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'drivers/bus/sun50i-de2.c')
-rw-r--r-- | drivers/bus/sun50i-de2.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/bus/sun50i-de2.c b/drivers/bus/sun50i-de2.c new file mode 100644 index 000000000000..672518741f86 --- /dev/null +++ b/drivers/bus/sun50i-de2.c @@ -0,0 +1,48 @@ +// 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); |