diff mbox series

net: can: cc770: Simplify parsing DT properties

Message ID 20240903135731.405635-1-robh@kernel.org (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series net: can: cc770: Simplify parsing DT properties | expand

Checks

Context Check Description
netdev/series_format warning Single patches do not need cover letters; Target tree name not specified in the subject
netdev/tree_selection success Guessed tree name to be net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 16 this patch: 16
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang success Errors and warnings before: 16 this patch: 16
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 16 this patch: 16
netdev/checkpatch warning WARNING: line length of 81 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest fail net-next-2024-09-03--18-00 (tests: 714)

Commit Message

Rob Herring (Arm) Sept. 3, 2024, 1:57 p.m. UTC 
Use of the typed property accessors is preferred over of_get_property().
The existing code doesn't work on little endian systems either. Replace
the of_get_property() calls with of_property_read_bool() and
of_property_read_u32().

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
---
v2:
- Use reverse xmas tree order
- Fix slew unsigned comparison
---
 drivers/net/can/cc770/cc770_platform.c | 32 +++++++++-----------------
 1 file changed, 11 insertions(+), 21 deletions(-)

Comments

Marc Kleine-Budde Sept. 4, 2024, 9:52 a.m. UTC | #1 
On 03.09.2024 08:57:30, Rob Herring (Arm) wrote:
> Use of the typed property accessors is preferred over of_get_property().
> The existing code doesn't work on little endian systems either. Replace
> the of_get_property() calls with of_property_read_bool() and
> of_property_read_u32().
> 
> Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
> ---
> v2:
> - Use reverse xmas tree order
> - Fix slew unsigned comparison

Added to linux-can-next.

Thanks,
Marc
diff mbox series

Patch

diff --git a/drivers/net/can/cc770/cc770_platform.c b/drivers/net/can/cc770/cc770_platform.c
index 13bcfba05f18..f2424fe58612 100644
--- a/drivers/net/can/cc770/cc770_platform.c
+++ b/drivers/net/can/cc770/cc770_platform.c
@@ -70,17 +70,10 @@  static void cc770_platform_write_reg(const struct cc770_priv *priv, int reg,
 static int cc770_get_of_node_data(struct platform_device *pdev,
 				  struct cc770_priv *priv)
 {
+	u32 clkext = CC770_PLATFORM_CAN_CLOCK, clkout = 0;
 	struct device_node *np = pdev->dev.of_node;
-	const u32 *prop;
-	int prop_size;
-	u32 clkext;
-
-	prop = of_get_property(np, "bosch,external-clock-frequency",
-			       &prop_size);
-	if (prop && (prop_size ==  sizeof(u32)))
-		clkext = *prop;
-	else
-		clkext = CC770_PLATFORM_CAN_CLOCK; /* default */
+
+	of_property_read_u32(np, "bosch,external-clock-frequency", &clkext);
 	priv->can.clock.freq = clkext;
 
 	/* The system clock may not exceed 10 MHz */
@@ -98,7 +91,7 @@  static int cc770_get_of_node_data(struct platform_device *pdev,
 	if (of_property_read_bool(np, "bosch,iso-low-speed-mux"))
 		priv->cpu_interface |= CPUIF_MUX;
 
-	if (!of_get_property(np, "bosch,no-comperator-bypass", NULL))
+	if (!of_property_read_bool(np, "bosch,no-comperator-bypass"))
 		priv->bus_config |= BUSCFG_CBY;
 	if (of_property_read_bool(np, "bosch,disconnect-rx0-input"))
 		priv->bus_config |= BUSCFG_DR0;
@@ -109,25 +102,22 @@  static int cc770_get_of_node_data(struct platform_device *pdev,
 	if (of_property_read_bool(np, "bosch,polarity-dominant"))
 		priv->bus_config |= BUSCFG_POL;
 
-	prop = of_get_property(np, "bosch,clock-out-frequency", &prop_size);
-	if (prop && (prop_size == sizeof(u32)) && *prop > 0) {
-		u32 cdv = clkext / *prop;
-		int slew;
+	of_property_read_u32(np, "bosch,clock-out-frequency", &clkout);
+	if (clkout > 0) {
+		u32 cdv = clkext / clkout;
 
 		if (cdv > 0 && cdv < 16) {
+			u32 slew;
+
 			priv->cpu_interface |= CPUIF_CEN;
 			priv->clkout |= (cdv - 1) & CLKOUT_CD_MASK;
 
-			prop = of_get_property(np, "bosch,slew-rate",
-					       &prop_size);
-			if (prop && (prop_size == sizeof(u32))) {
-				slew = *prop;
-			} else {
+			if (of_property_read_u32(np, "bosch,slew-rate", &slew)) {
 				/* Determine default slew rate */
 				slew = (CLKOUT_SL_MASK >>
 					CLKOUT_SL_SHIFT) -
 					((cdv * clkext - 1) / 8000000);
-				if (slew < 0)
+				if (slew > (CLKOUT_SL_MASK >> CLKOUT_SL_SHIFT))
 					slew = 0;
 			}
 			priv->clkout |= (slew << CLKOUT_SL_SHIFT) &