| Message ID | 20220205185429.2278860-20-paul.kocialkowski@bootlin.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | Allwinner A31/A83T MIPI CSI-2 Support and A31 ISP Support | expand |
Hi, On Sat, Feb 05, 2022 at 07:53:42PM +0100, Paul Kocialkowski wrote: > Since the bus clock alone is not enough to get access to the registers, > don't pass it to regmap and manage it instead just like the other > clocks. > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> I'm not really sure about this one. Sure, there's more resources involved than the clock to get access to the registers (like reset), but you can't have a functional device without the reset line deasserted. You can however have a functional device without the bus clock enabled, so it just seems much better to let regmap manage it. Unless there's a drawback to it of course, but it should be in your commit log if so. Maxime
diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c index 5fbaa1e99412..dc79f3c14336 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c @@ -827,13 +827,19 @@ static int sun6i_csi_resource_request(struct sun6i_csi_device *csi_dev, if (IS_ERR(io_base)) return PTR_ERR(io_base); - csi_dev->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "bus", io_base, - &sun6i_csi_regmap_config); + csi_dev->regmap = devm_regmap_init_mmio(&pdev->dev, io_base, + &sun6i_csi_regmap_config); if (IS_ERR(csi_dev->regmap)) { dev_err(&pdev->dev, "Failed to init register map\n"); return PTR_ERR(csi_dev->regmap); } + csi_dev->clk_bus = devm_clk_get(&pdev->dev, "bus"); + if (IS_ERR(csi_dev->clk_bus)) { + dev_err(&pdev->dev, "Unable to acquire bus clock\n"); + return PTR_ERR(csi_dev->clk_bus); + } + csi_dev->clk_mod = devm_clk_get(&pdev->dev, "mod"); if (IS_ERR(csi_dev->clk_mod)) { dev_err(&pdev->dev, "Unable to acquire csi clock\n"); diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h index e4e7ac6c869f..356661b413f8 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h @@ -51,6 +51,7 @@ struct sun6i_csi_device { struct sun6i_video video; struct regmap *regmap; + struct clk *clk_bus; struct clk *clk_mod; struct clk *clk_ram; struct reset_control *reset;
Since the bus clock alone is not enough to get access to the registers, don't pass it to regmap and manage it instead just like the other clocks. Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> --- drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 10 ++++++++-- drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h | 1 + 2 files changed, 9 insertions(+), 2 deletions(-)