[PATCH] drm: Use of_property_present() for testing DT property presence

Rob Herring
2023-03-10T14:47:39Z

It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties. As
part of this, convert of_get_property/of_find_property calls to the
recently added of_property_present() helper when we just want to test
for presence of a property and nothing more.

Signed-off-by: Rob Herring <robh@kernel.org>
---
drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c | 2 +-
drivers/gpu/drm/drm_mipi_dsi.c | 2 +-
drivers/gpu/drm/msm/adreno/adreno_gpu.c | 2 +-
drivers/gpu/drm/sun4i/sun4i_backend.c | 2 +-
drivers/gpu/drm/sun4i/sun8i_mixer.c | 2 +-
drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +-
6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
index 9e5f2b4dc2e5..fab139b324af 100644
--- a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
+++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
@@ -313,7 +313,7 @@ imx8qxp_pixel_link_find_next_bridge(struct imx8qxp_pixel_link *pl)
}

/* specially select the next bridge with companion PXL2DPI */
- if (of_find_property(remote, "fsl,companion-pxl2dpi", NULL))
+ if (of_property_present(remote, "fsl,companion-pxl2dpi"))
bridge_sel = ep_cnt;

ep_cnt++;
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index b41aaf2bb9f1..7900a4707d7c 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -329,7 +329,7 @@ int mipi_dsi_host_register(struct mipi_dsi_host *host)

for_each_available_child_of_node(host->dev->of_node, node) {
/* skip nodes without reg property */
- if (!of_find_property(node, "reg", NULL))
+ if (!of_property_present(node, "reg"))
continue;
of_mipi_dsi_device_add(host, node);
}
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index ce6b76c45b6f..2359dca80492 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -964,7 +964,7 @@ static void adreno_get_pwrlevels(struct device *dev,
gpu->fast_rate = 0;

/* You down with OPP? */
- if (!of_find_property(dev->of_node, "operating-points-v2", NULL))
+ if (!of_property_present(dev->of_node, "operating-points-v2"))
ret = adreno_get_legacy_pwrlevels(dev);
else {
ret = devm_pm_opp_of_add_table(dev);
diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index 38070fc261f3..b11dbd50d73e 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -792,7 +792,7 @@ static int sun4i_backend_bind(struct device *dev, struct device *master,
dev_set_drvdata(dev, backend);
spin_lock_init(&backend->frontend_lock);

- if (of_find_property(dev->of_node, "interconnects", NULL)) {
+ if (of_property_present(dev->of_node, "interconnects")) {
/*
* This assume we have the same DMA constraints for all our the
* devices in our pipeline (all the backends, but also the
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index bafee05f6b24..11d5244a5aa5 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -391,7 +391,7 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
mixer->engine.ops = &sun8i_engine_ops;
mixer->engine.node = dev->of_node;

- if (of_find_property(dev->of_node, "iommus", NULL)) {
+ if (of_property_present(dev->of_node, "iommus")) {
/*
* This assume we have the same DMA constraints for
* all our the mixers in our pipeline. This sounds
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index ea22c9bf223a..bec1e0cdddb3 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -3018,7 +3018,7 @@ static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
struct device *dev = &pdev->dev;
int ret;

- if (!of_find_property(dev->of_node, "interrupts", NULL)) {
+ if (!of_property_present(dev->of_node, "interrupts")) {
dev_warn(dev, "'interrupts' DT property is missing, no CEC\n");
return 0;
}
--
2.39.2