On wo, 2015-07-08 at 17:11 +0100, Peter Griffin wrote:
> --- a/drivers/dma/Kconfig
> +++ b/drivers/dma/Kconfig
> +config ST_FDMA
> + bool "ST FDMA dmaengine support"
> + depends on ARCH_STI
> + select DMA_ENGINE
> + select FW_LOADER
> + select FW_LOADER_USER_HELPER_FALLBACK
> + select LIBELF_32
> + select DMA_VIRTUAL_CHANNELS
> + help
> + Enable support for ST FDMA controller.
> + It supports 16 independent DMA channels, accepts up to 32 DMA requests
> +
> + Say Y here if you have such a chipset.
> + If unsure, say N.
> --- a/drivers/dma/Makefile
> +++ b/drivers/dma/Makefile
>
> +obj-$(CONFIG_ST_FDMA) += st_fdma.o
ST_FDMA is a bool symbol, so st_fdma.o can only be built-in.
> --- /dev/null
> +++ b/drivers/dma/st_fdma.c
> +#include <linux/module.h>
Needed?
> +void *st_fdma_seg_to_mem(struct st_fdma_dev *fdev, u64 da, int len)
static?
> +{
> + [...]
> +}
> +static int
> +st_fdma_elf_load_segments(struct st_fdma_dev *fdev, const struct
> firmware *fw)
> +{
> + [...]
> + dst = st_fdma_seg_to_mem(fdev, da, memsz);
> + [...]
> +}
> +static const struct of_device_id st_fdma_match[] = {
> + { .compatible = "st,fdma_mpe31", .data = &fdma_mpe31 },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, st_fdma_match);
MODULE_DEVICE_TABLE() is preprocessed away for built-in only code.
> +static int __exit st_fdma_remove(struct platform_device *pdev)
> +{
> + struct st_fdma_dev *fdev = platform_get_drvdata(pdev);
> +
> + wait_for_completion(&fdev->fw_ack);
> +
> + st_fdma_clk_disable(fdev);
> +
> + return 0;
> +}
Since this driver is built-in only this means st_fdma_remove() can never
be used, right?
> +static struct platform_driver st_fdma_platform_driver = {
> + .driver = {
> + .name = "st-fdma",
> + .of_match_table = st_fdma_match,
> + .pm = ST_FDMA_PM,
> + },
> + .probe = st_fdma_probe,
> + .remove = st_fdma_remove,
> +};
> +module_platform_driver(st_fdma_platform_driver);
So can .remove be dropped?
Since v4.2-rc1 there's builtin_platform_driver() for built-in only code.
> +bool st_fdma_filter_fn(struct dma_chan *chan, void *param)
> +{
> + [...]
> +}
> +EXPORT_SYMBOL(st_fdma_filter_fn);
This series adds no users of this export. I suppose they will be added
in another series. Is that correct?
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("STMicroelectronics FDMA engine driver");
> +MODULE_AUTHOR("Ludovic.barre <[email protected]>");
These macros will, basically, be preprocessed away for built-in only
code.
Thanks,
Paul Bolle
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