Re: [RESEND v8 08/19] clk: mediatek: reset: Support inuput argument index mode

Stephen Boyd
2022-06-16T01:52:32Z

Quoting Rex-BC Chen (2022-05-23 02:33:35)
> There is a large number of mediatek infra reset bits, but we do not use
> all of them. In addition, the proper input argement of reset controller
> soulde be index.
> Therefore, to be compatible with previous drivers and usage, we add
> description variables to store the ids which can mapping to index.
>
> To use this mode, we need to put the id in rst_idx_map to map from
> index to ids. For example, if we want to input index 1 (this index
> is used to set bank 1 bit 14) for svs, we need to declare the reset
> controller like this:
>
> In drivers:
> static u16 rst_ofs[] = {
> 0x120, 0x130, 0x140, 0x150, 0x730,
> };
>
> static u16 rst_idx_map[] = {
> 0 * 32 + 0,
> 1 * 32 + 14,
> ....
> };
>
> static const struct mtk_clk_rst_desc clk_rst_desc = {
> .version = MTK_RST_SET_CLR,
> .rst_bank_ofs = rst_ofs,
> .rst_bank_nr = ARRAY_SIZE(rst_ofs),
> .rst_idx_map = rst_idx_map,
> .rst_idx_map_nr = ARRAY_SIZE(rst_idx_map),
> };
>
> In dts:
> svs: {
> ...
> resets = <&infra 1>;
> ...
> };
>
> Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> ---

Applied to clk-next