Hi Philipp,
On Mon, 30 Jan 2017 12:41:11 +0100
Philipp Zabel <[email protected]> wrote:
> As of commit bb475230b8e5 ("reset: make optional functions really
> optional"), the reset framework API calls use NULL pointers to describe
> optional, non-present reset controls.
>
> This allows to return errors from devm_reset_control_get_optional and to
> call reset_control_(de)assert unconditionally.
>
> Signed-off-by: Philipp Zabel <[email protected]>
> Cc: Icenowy Zheng <[email protected]>
> Cc: Maxime Ripard <[email protected]>
> Cc: Boris Brezillon <[email protected]>
I didn't find commit bb475230b8e5 in mainline, so I guess you plan to
take this patch in your own tree. Let me know if this is not the case.
Acked-by: Boris Brezillon <[email protected]>
> ---
> drivers/mtd/nand/sunxi_nand.c | 19 ++++++++-----------
> 1 file changed, 8 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
> index e40482a65de66..c6769b52c666a 100644
> --- a/drivers/mtd/nand/sunxi_nand.c
> +++ b/drivers/mtd/nand/sunxi_nand.c
> @@ -2196,16 +2196,15 @@ static int sunxi_nfc_probe(struct platform_device
> *pdev)
> goto out_ahb_clk_unprepare;
>
> nfc->reset = devm_reset_control_get_optional(dev, "ahb");
> - if (!IS_ERR(nfc->reset)) {
> - ret = reset_control_deassert(nfc->reset);
> - if (ret) {
> - dev_err(dev, "reset err %d\n", ret);
> - goto out_mod_clk_unprepare;
> - }
> - } else if (PTR_ERR(nfc->reset) != -ENOENT) {
> + if (IS_ERR(nfc->reset)) {
> ret = PTR_ERR(nfc->reset);
> goto out_mod_clk_unprepare;
> }
> + ret = reset_control_deassert(nfc->reset);
> + if (ret) {
> + dev_err(dev, "reset err %d\n", ret);
> + goto out_mod_clk_unprepare;
> + }
>
> ret = sunxi_nfc_rst(nfc);
> if (ret)
> @@ -2246,8 +2245,7 @@ static int sunxi_nfc_probe(struct platform_device *pdev)
> if (nfc->dmac)
> dma_release_channel(nfc->dmac);
> out_ahb_reset_reassert:
> - if (!IS_ERR(nfc->reset))
> - reset_control_assert(nfc->reset);
> + reset_control_assert(nfc->reset);
> out_mod_clk_unprepare:
> clk_disable_unprepare(nfc->mod_clk);
> out_ahb_clk_unprepare:
> @@ -2262,8 +2260,7 @@ static int sunxi_nfc_remove(struct platform_device
> *pdev)
>
> sunxi_nand_chips_cleanup(nfc);
>
> - if (!IS_ERR(nfc->reset))
> - reset_control_assert(nfc->reset);
> + reset_control_assert(nfc->reset);
>
> if (nfc->dmac)
> dma_release_channel(nfc->dmac);
