On Sun, Jul 24, 2022 at 09:00:01PM +0200, Ahmad Fatoum wrote:
> This makes it easier to port Linux drivers like PMICs, where a device
> tree probed MFD node exists and the driver matching against it then
> registers a number of MFD cell devices, which don't have their own
> DT compatibles.
>
> Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
> ---
> v3 -> v4:
> - no change
> v2 -> v3:
> - no change
> v1 -> v2:
> - no change
> v0 (before folding into series) -> v1:
> - call device_add_data before platform_device_register, which
> may immediately probe (Sascha)
> ---
> drivers/base/resource.c | 2 +-
> drivers/mfd/Makefile | 2 ++
> drivers/mfd/core.c | 25 +++++++++++++++++++++++++
> include/driver.h | 2 +-
> include/linux/mfd/core.h | 23 +++++++++++++++++++++++
> 5 files changed, 52 insertions(+), 2 deletions(-)
> create mode 100644 drivers/mfd/core.c
> create mode 100644 include/linux/mfd/core.h
Applied, thanks
Sascha
>
> diff --git a/drivers/base/resource.c b/drivers/base/resource.c
> index d0d39620772e..0134456ffac2 100644
> --- a/drivers/base/resource.c
> +++ b/drivers/base/resource.c
> @@ -20,7 +20,7 @@ struct device_d *device_alloc(const char *devname, int id)
> return dev;
> }
>
> -int device_add_data(struct device_d *dev, void *data, size_t size)
> +int device_add_data(struct device_d *dev, const void *data, size_t size)
> {
> free(dev->platform_data);
>
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 50f54cfcf21c..2b988bdc9a3d 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -1,4 +1,6 @@
> # SPDX-License-Identifier: GPL-2.0-only
> +obj-y += core.o
> +
> obj-$(CONFIG_MFD_ACT8846) += act8846.o
> obj-$(CONFIG_MFD_DA9053) += da9053.o
> obj-$(CONFIG_MFD_DA9063) += da9063.o
> diff --git a/drivers/mfd/core.c b/drivers/mfd/core.c
> new file mode 100644
> index 000000000000..495427ae9c87
> --- /dev/null
> +++ b/drivers/mfd/core.c
> @@ -0,0 +1,25 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +
> +#include <linux/mfd/core.h>
> +#include <driver.h>
> +
> +int mfd_add_devices(struct device_d *parent, const struct mfd_cell *cells, int n_devs)
> +{
> + struct device_d *dev;
> + int ret, i;
> +
> + for (i = 0; i < n_devs; i++) {
> + dev = device_alloc(cells[i].name, DEVICE_ID_DYNAMIC);
> + dev->parent = parent;
> +
> + ret = device_add_data(dev, &cells[i], sizeof(cells[i]));
> + if (ret)
> + return ret;
> +
> + ret = platform_device_register(dev);
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> diff --git a/include/driver.h b/include/driver.h
> index a89ce7af9ddd..67ffbba6be80 100644
> --- a/include/driver.h
> +++ b/include/driver.h
> @@ -243,7 +243,7 @@ int device_add_resources(struct device_d *dev, const struct resource *res, int n
> int device_add_resource(struct device_d *dev, const char *resname,
> resource_size_t start, resource_size_t size, unsigned int flags);
>
> -int device_add_data(struct device_d *dev, void *data, size_t size);
> +int device_add_data(struct device_d *dev, const void *data, size_t size);
>
> /*
> * register a generic device
> diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h
> new file mode 100644
> index 000000000000..2b3b51c69e5f
> --- /dev/null
> +++ b/include/linux/mfd/core.h
> @@ -0,0 +1,23 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (c) 2006 Ian Molton
> + * Copyright (c) 2007 Dmitry Baryshkov
> + */
> +
> +#ifndef MFD_CORE_H
> +#define MFD_CORE_H
> +
> +struct device_d;
> +
> +/*
> + * This struct describes the MFD part ("cell").
> + * After registration the copy of this structure will become the platform data
> + * of the resulting device_d
> + */
> +struct mfd_cell {
> + const char *name;
> +};
> +
> +int mfd_add_devices(struct device_d *parent, const struct mfd_cell *cells, int n_devs);
> +
> +#endif
> --
> 2.30.2
>
>
>
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