Mario Six | 8862f45 | 2018-10-04 09:00:54 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * (C) Copyright 2017 |
| 4 | * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc |
| 5 | */ |
| 6 | |
Mario Six | 8862f45 | 2018-10-04 09:00:54 +0200 | [diff] [blame] | 7 | #include <dm.h> |
Simon Glass | 0f2af88 | 2020-05-10 11:40:05 -0600 | [diff] [blame] | 8 | #include <log.h> |
Mario Six | 8862f45 | 2018-10-04 09:00:54 +0200 | [diff] [blame] | 9 | #include <dm/lists.h> |
| 10 | |
| 11 | #include "gdsys_soc.h" |
| 12 | |
| 13 | /** |
| 14 | * struct gdsys_soc_priv - Private data for gdsys soc bus |
| 15 | * @fpga: The gdsys IHS FPGA this bus is associated with |
| 16 | */ |
| 17 | struct gdsys_soc_priv { |
| 18 | struct udevice *fpga; |
| 19 | }; |
| 20 | |
| 21 | static const struct udevice_id gdsys_soc_ids[] = { |
| 22 | { .compatible = "gdsys,soc" }, |
| 23 | { /* sentinel */ } |
| 24 | }; |
| 25 | |
| 26 | int gdsys_soc_get_fpga(struct udevice *child, struct udevice **fpga) |
| 27 | { |
| 28 | struct gdsys_soc_priv *bus_priv; |
| 29 | |
| 30 | if (!child->parent) { |
| 31 | debug("%s: Invalid parent\n", child->name); |
| 32 | return -EINVAL; |
| 33 | } |
| 34 | |
| 35 | if (!device_is_compatible(child->parent, "gdsys,soc")) { |
| 36 | debug("%s: Not child of a gdsys soc\n", child->name); |
| 37 | return -EINVAL; |
| 38 | } |
| 39 | |
| 40 | bus_priv = dev_get_priv(child->parent); |
| 41 | |
| 42 | *fpga = bus_priv->fpga; |
| 43 | |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | static int gdsys_soc_probe(struct udevice *dev) |
| 48 | { |
| 49 | struct gdsys_soc_priv *priv = dev_get_priv(dev); |
| 50 | struct udevice *fpga; |
| 51 | int res = uclass_get_device_by_phandle(UCLASS_MISC, dev, "fpga", |
| 52 | &fpga); |
| 53 | if (res == -ENOENT) { |
| 54 | debug("%s: Could not find 'fpga' phandle\n", dev->name); |
| 55 | return -EINVAL; |
| 56 | } |
| 57 | |
| 58 | if (res == -ENODEV) { |
| 59 | debug("%s: Could not get FPGA device\n", dev->name); |
| 60 | return -EINVAL; |
| 61 | } |
| 62 | |
| 63 | priv->fpga = fpga; |
| 64 | |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | U_BOOT_DRIVER(gdsys_soc_bus) = { |
| 69 | .name = "gdsys_soc_bus", |
| 70 | .id = UCLASS_SIMPLE_BUS, |
| 71 | .of_match = gdsys_soc_ids, |
| 72 | .probe = gdsys_soc_probe, |
Simon Glass | 8a2b47f | 2020-12-03 16:55:17 -0700 | [diff] [blame] | 73 | .priv_auto = sizeof(struct gdsys_soc_priv), |
Mario Six | 8862f45 | 2018-10-04 09:00:54 +0200 | [diff] [blame] | 74 | }; |