diff options
author | Samuel Holland <samuel@sholland.org> | 2022-11-06 23:35:51 -0600 |
---|---|---|
committer | Maxime Ripard <maxime@cerno.tech> | 2022-11-07 14:09:54 +0100 |
commit | 1fa734a8163072e8f126259de2cadfa88d5bea70 (patch) | |
tree | d1ae25c99e6fdc208fce1974e3bfec101344470f /drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | |
parent | c1c7b394d8c35b2696f0b9d5840504d69fbdfa23 (diff) | |
download | linux-1fa734a8163072e8f126259de2cadfa88d5bea70.tar.bz2 |
drm/sun4i: dsi: Add a variant structure
Replace the ad-hoc calls to of_device_is_compatible() with a structure
describing the differences between variants. This is in preparation for
adding more variants to the driver.
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20221107053552.2330-4-samuel@sholland.org
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c')
-rw-r--r-- | drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 53 |
1 files changed, 35 insertions, 18 deletions
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 34234a144e87..f22c96cc8408 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -1101,12 +1101,16 @@ static const struct component_ops sun6i_dsi_ops = { static int sun6i_dsi_probe(struct platform_device *pdev) { + const struct sun6i_dsi_variant *variant; struct device *dev = &pdev->dev; - const char *bus_clk_name = NULL; struct sun6i_dsi *dsi; void __iomem *base; int ret; + variant = device_get_match_data(dev); + if (!variant) + return -EINVAL; + dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL); if (!dsi) return -ENOMEM; @@ -1114,10 +1118,7 @@ static int sun6i_dsi_probe(struct platform_device *pdev) dsi->dev = dev; dsi->host.ops = &sun6i_dsi_host_ops; dsi->host.dev = dev; - - if (of_device_is_compatible(dev->of_node, - "allwinner,sun6i-a31-mipi-dsi")) - bus_clk_name = "bus"; + dsi->variant = variant; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) { @@ -1142,7 +1143,7 @@ static int sun6i_dsi_probe(struct platform_device *pdev) return PTR_ERR(dsi->regs); } - dsi->bus_clk = devm_clk_get(dev, bus_clk_name); + dsi->bus_clk = devm_clk_get(dev, variant->has_mod_clk ? "bus" : NULL); if (IS_ERR(dsi->bus_clk)) return dev_err_probe(dev, PTR_ERR(dsi->bus_clk), "Couldn't get the DSI bus clock\n"); @@ -1151,21 +1152,21 @@ static int sun6i_dsi_probe(struct platform_device *pdev) if (ret) return ret; - if (of_device_is_compatible(dev->of_node, - "allwinner,sun6i-a31-mipi-dsi")) { + if (variant->has_mod_clk) { dsi->mod_clk = devm_clk_get(dev, "mod"); if (IS_ERR(dsi->mod_clk)) { dev_err(dev, "Couldn't get the DSI mod clock\n"); ret = PTR_ERR(dsi->mod_clk); goto err_attach_clk; } - } - /* - * In order to operate properly, that clock seems to be always - * set to 297MHz. - */ - clk_set_rate_exclusive(dsi->mod_clk, 297000000); + /* + * In order to operate properly, the module clock on the + * A31 variant always seems to be set to 297MHz. + */ + if (variant->set_mod_clk) + clk_set_rate_exclusive(dsi->mod_clk, 297000000); + } dsi->dphy = devm_phy_get(dev, "dphy"); if (IS_ERR(dsi->dphy)) { @@ -1191,7 +1192,8 @@ static int sun6i_dsi_probe(struct platform_device *pdev) err_remove_dsi_host: mipi_dsi_host_unregister(&dsi->host); err_unprotect_clk: - clk_rate_exclusive_put(dsi->mod_clk); + if (dsi->variant->has_mod_clk && dsi->variant->set_mod_clk) + clk_rate_exclusive_put(dsi->mod_clk); err_attach_clk: regmap_mmio_detach_clk(dsi->regs); @@ -1205,16 +1207,31 @@ static int sun6i_dsi_remove(struct platform_device *pdev) component_del(&pdev->dev, &sun6i_dsi_ops); mipi_dsi_host_unregister(&dsi->host); - clk_rate_exclusive_put(dsi->mod_clk); + if (dsi->variant->has_mod_clk && dsi->variant->set_mod_clk) + clk_rate_exclusive_put(dsi->mod_clk); regmap_mmio_detach_clk(dsi->regs); return 0; } +static const struct sun6i_dsi_variant sun6i_a31_mipi_dsi_variant = { + .has_mod_clk = true, + .set_mod_clk = true, +}; + +static const struct sun6i_dsi_variant sun50i_a64_mipi_dsi_variant = { +}; + static const struct of_device_id sun6i_dsi_of_table[] = { - { .compatible = "allwinner,sun6i-a31-mipi-dsi" }, - { .compatible = "allwinner,sun50i-a64-mipi-dsi" }, + { + .compatible = "allwinner,sun6i-a31-mipi-dsi", + .data = &sun6i_a31_mipi_dsi_variant, + }, + { + .compatible = "allwinner,sun50i-a64-mipi-dsi", + .data = &sun50i_a64_mipi_dsi_variant, + }, { } }; MODULE_DEVICE_TABLE(of, sun6i_dsi_of_table); |