| Message ID | 20230822131237.1022815-25-lizetao1@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | spi: Use devm_clk_get_*() helper function to simplify the drivers. | expand |
On Tue, 22 Aug 2023 21:12:36 +0800 Li Zetao <lizetao1@huawei.com> wrote: > Since commit 7ef9651e9792 ("clk: Provide new devm_clk helpers for prepared > and enabled clocks"), devm_clk_get() and clk_prepare_enable() can now be > replaced by devm_clk_get_enabled() when driver enables (and possibly > prepares) the clocks for the whole lifetime of the device. Moreover, it is > no longer necessary to unprepare and disable the clocks explicitly. > Moreover, the label "err_no_clk_en" is no used, drop it for clean code. > > Signed-off-by: Li Zetao <lizetao1@huawei.com> Hi. There is some odd formatting in the existing file, but cleaning that up should probably be a separate patch. Thanks, Jonathan > --- > drivers/spi/spi-pl022.c | 21 ++++++--------------- > 1 file changed, 6 insertions(+), 15 deletions(-) > > diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c > index 1af75eff26b6..468a7fea9091 100644 > --- a/drivers/spi/spi-pl022.c > +++ b/drivers/spi/spi-pl022.c > @@ -2168,19 +2168,13 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id) > dev_info(&adev->dev, "mapped registers from %pa to %p\n", > &adev->res.start, pl022->virtbase); > > - pl022->clk = devm_clk_get(&adev->dev, NULL); > + pl022->clk = devm_clk_get_enabled(&adev->dev, NULL); > if (IS_ERR(pl022->clk)) { > status = PTR_ERR(pl022->clk); > dev_err(&adev->dev, "could not retrieve SSP/SPI bus clock\n"); > goto err_no_clk; > } > > - status = clk_prepare_enable(pl022->clk); > - if (status) { > - dev_err(&adev->dev, "could not enable SSP/SPI bus clock\n"); > - goto err_no_clk_en; > - } > - > /* Initialize transfer pump */ > tasklet_init(&pl022->pump_transfers, pump_transfers, > (unsigned long)pl022); > @@ -2236,16 +2230,14 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id) > > return 0; > > - err_spi_register: > +err_spi_register: > if (platform_info->enable_dma) > pl022_dma_remove(pl022); > - err_no_irq: > - clk_disable_unprepare(pl022->clk); > - err_no_clk_en: > - err_no_clk: > - err_no_ioremap: > +err_no_irq: > +err_no_clk: > +err_no_ioremap: > amba_release_regions(adev); > - err_no_ioregion: > +err_no_ioregion: > spi_master_put(master); > return status; > } > @@ -2268,7 +2260,6 @@ pl022_remove(struct amba_device *adev) > if (pl022->master_info->enable_dma) > pl022_dma_remove(pl022); > > - clk_disable_unprepare(pl022->clk); > amba_release_regions(adev); > tasklet_disable(&pl022->pump_transfers); > }
On Tue, Aug 22, 2023 at 3:13 PM Li Zetao <lizetao1@huawei.com> wrote: > Since commit 7ef9651e9792 ("clk: Provide new devm_clk helpers for prepared > and enabled clocks"), devm_clk_get() and clk_prepare_enable() can now be > replaced by devm_clk_get_enabled() when driver enables (and possibly > prepares) the clocks for the whole lifetime of the device. Moreover, it is > no longer necessary to unprepare and disable the clocks explicitly. > Moreover, the label "err_no_clk_en" is no used, drop it for clean code. > > Signed-off-by: Li Zetao <lizetao1@huawei.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Yours, Linus Walleij
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c index 1af75eff26b6..468a7fea9091 100644 --- a/drivers/spi/spi-pl022.c +++ b/drivers/spi/spi-pl022.c @@ -2168,19 +2168,13 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id) dev_info(&adev->dev, "mapped registers from %pa to %p\n", &adev->res.start, pl022->virtbase); - pl022->clk = devm_clk_get(&adev->dev, NULL); + pl022->clk = devm_clk_get_enabled(&adev->dev, NULL); if (IS_ERR(pl022->clk)) { status = PTR_ERR(pl022->clk); dev_err(&adev->dev, "could not retrieve SSP/SPI bus clock\n"); goto err_no_clk; } - status = clk_prepare_enable(pl022->clk); - if (status) { - dev_err(&adev->dev, "could not enable SSP/SPI bus clock\n"); - goto err_no_clk_en; - } - /* Initialize transfer pump */ tasklet_init(&pl022->pump_transfers, pump_transfers, (unsigned long)pl022); @@ -2236,16 +2230,14 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id) return 0; - err_spi_register: +err_spi_register: if (platform_info->enable_dma) pl022_dma_remove(pl022); - err_no_irq: - clk_disable_unprepare(pl022->clk); - err_no_clk_en: - err_no_clk: - err_no_ioremap: +err_no_irq: +err_no_clk: +err_no_ioremap: amba_release_regions(adev); - err_no_ioregion: +err_no_ioregion: spi_master_put(master); return status; } @@ -2268,7 +2260,6 @@ pl022_remove(struct amba_device *adev) if (pl022->master_info->enable_dma) pl022_dma_remove(pl022); - clk_disable_unprepare(pl022->clk); amba_release_regions(adev); tasklet_disable(&pl022->pump_transfers); }
Since commit 7ef9651e9792 ("clk: Provide new devm_clk helpers for prepared and enabled clocks"), devm_clk_get() and clk_prepare_enable() can now be replaced by devm_clk_get_enabled() when driver enables (and possibly prepares) the clocks for the whole lifetime of the device. Moreover, it is no longer necessary to unprepare and disable the clocks explicitly. Moreover, the label "err_no_clk_en" is no used, drop it for clean code. Signed-off-by: Li Zetao <lizetao1@huawei.com> --- drivers/spi/spi-pl022.c | 21 ++++++--------------- 1 file changed, 6 insertions(+), 15 deletions(-)