From: Angelo Dureghello <adureghello@xxxxxxxxxxxx> Change to obtain the fdt use case as reported in the adi,ad3552r.yaml file in this patchset. The DAC device is defined as a child node of the backend. Registering the child fdt node as a platform devices. Signed-off-by: Angelo Dureghello <adureghello@xxxxxxxxxxxx> --- drivers/iio/dac/adi-axi-dac.c | 53 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/iio/dac/adi-axi-dac.c b/drivers/iio/dac/adi-axi-dac.c index b887c6343f96..f85e3138d428 100644 --- a/drivers/iio/dac/adi-axi-dac.c +++ b/drivers/iio/dac/adi-axi-dac.c @@ -29,6 +29,8 @@ #include <linux/iio/buffer.h> #include <linux/iio/iio.h> +#include "ad3552r-hs.h" + /* * Register definitions: * https://wiki.analog.com/resources/fpga/docs/axi_dac_ip#register_map @@ -738,6 +740,39 @@ static int axi_dac_bus_reg_read(struct iio_backend *back, u32 reg, u32 *val, return regmap_read(st->regmap, AXI_DAC_CUSTOM_RD_REG, val); } +static void axi_dac_child_remove(void *data) +{ + struct platform_device *pdev = data; + + platform_device_unregister(pdev); +} + +static int axi_dac_create_platform_device(struct axi_dac_state *st, + struct fwnode_handle *child) +{ + struct ad3552r_hs_platform_data pdata = { + .bus_reg_read = axi_dac_bus_reg_read, + .bus_reg_write = axi_dac_bus_reg_write, + }; + struct platform_device_info pi = { + .parent = st->dev, + .name = fwnode_get_name(child), + .id = PLATFORM_DEVID_AUTO, + .fwnode = child, + .data = &pdata, + .size_data = sizeof(pdata), + }; + struct platform_device *pdev; + + pdev = platform_device_register_full(&pi); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + device_set_node(&pdev->dev, child); + + return devm_add_action_or_reset(st->dev, axi_dac_child_remove, pdev); +} + static const struct iio_backend_ops axi_dac_generic_ops = { .enable = axi_dac_enable, .disable = axi_dac_disable, @@ -874,6 +909,24 @@ static int axi_dac_probe(struct platform_device *pdev) return dev_err_probe(&pdev->dev, ret, "failed to register iio backend\n"); + device_for_each_child_node_scoped(&pdev->dev, child) { + int val; + + /* Processing only reg 0 node */ + ret = fwnode_property_read_u32(child, "reg", &val); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "child node missing."); + if (val != 0) + return dev_err_probe(&pdev->dev, -EINVAL, + "invalid node address."); + + ret = axi_dac_create_platform_device(st, child); + if (ret) + return dev_err_probe(&pdev->dev, -EINVAL, + "could not create device."); + } + dev_info(&pdev->dev, "AXI DAC IP core (%d.%.2d.%c) probed\n", ADI_AXI_PCORE_VER_MAJOR(ver), ADI_AXI_PCORE_VER_MINOR(ver), -- 2.45.0.rc1
