From dfb970cc5f612a95fdf142f34610fccb3b2fc18c Mon Sep 17 00:00:00 2001 From: "Rob Herring (Arm)" Date: Tue, 3 Sep 2024 08:57:30 -0500 Subject: [PATCH] net: can: cc770: Simplify parsing DT properties 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) Link: https://patch.msgid.link/20240903135731.405635-1-robh@kernel.org Signed-off-by: Marc Kleine-Budde --- drivers/net/can/cc770/cc770_platform.c | 32 +++++++++----------------- 1 file changed, 11 insertions(+), 21 deletions(-) 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) & -- 2.20.1