On Mon, 17 Apr 2023, Herve Codina wrote:
> The Lantiq PEF2256 is a framer and line interface component designed to
> fulfill all required interfacing between an analog E1/T1/J1 line and the
> digital PCM system highway/H.100 bus.
>
> Signed-off-by: Herve Codina <herve.codina@xxxxxxxxxxx>
> ---
> drivers/mfd/Kconfig | 16 +
> drivers/mfd/Makefile | 1 +
> drivers/mfd/pef2256-regs.h | 250 ++++++++++
> drivers/mfd/pef2256.c | 950 ++++++++++++++++++++++++++++++++++++
95% of this driver needs to be moved somewhere else.
What is a Framer? Perhaps sound/ is a good candidate?
> include/linux/mfd/pef2256.h | 52 ++
> 5 files changed, 1269 insertions(+)
> create mode 100644 drivers/mfd/pef2256-regs.h
> create mode 100644 drivers/mfd/pef2256.c
> create mode 100644 include/linux/mfd/pef2256.h
[...]
> +static int pef2256_add_audio_devices(struct pef2256 *pef2256)
> +{
> + const char *compatible = "lantiq,pef2256-codec";
> + struct mfd_cell *audio_devs;
> + struct device_node *np;
> + unsigned int count = 0;
> + unsigned int i;
> + int ret;
> +
> + for_each_available_child_of_node(pef2256->dev->of_node, np) {
> + if (of_device_is_compatible(np, compatible))
> + count++;
> + }
Converting Device Tree nodes into MFD cells to register with the
Platform Device API is not a reasonable use-case of MFD.
Have the CODEC driver match on "lantiq,pef2256-codec" and let it
instantiate itself.
Your first version using of_platform_populate() was closer to the mark.
> + if (!count)
> + return 0;
> +
> + audio_devs = kcalloc(count, sizeof(*audio_devs), GFP_KERNEL);
> + if (!audio_devs)
> + return -ENOMEM;
> +
> + for (i = 0; i < count; i++) {
> + (audio_devs + i)->name = "lantiq-pef2256-codec";
> + (audio_devs + i)->of_compatible = compatible;
> + (audio_devs + i)->id = i;
> + }
> +
> + ret = mfd_add_devices(pef2256->dev, 0, audio_devs, count, NULL, 0, NULL);
> + kfree(audio_devs);
> + return ret;
> +}
--
Lee Jones [李琼斯]
