irqchip: keystone: Use syscon_regmap_lookup_by_phandle_args

Use syscon_regmap_lookup_by_phandle_args() which is a wrapper over
syscon_regmap_lookup_by_phandle() combined with getting the syscon
argument.  Except simpler code this annotates within one line that given
phandle has arguments, so grepping for code would be easier.

There is also no real benefit in printing errors on missing syscon
argument, because this is done just too late: runtime check on
static/build-time data.  Dtschema and Devicetree bindings offer the
static/build-time check for this already.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250111185414.183971-1-krzysztof.kozlowski@linaro.org

diff --git a/drivers/irqchip/irq-keystone.c b/drivers/irqchip/irq-keystone.c
index 808c781e254835161813eb09a4ac3498ee6f334c..37e1a03fcbb4597f1f2cb2484684947150147499 100644 (file)
--- a/drivers/irqchip/irq-keystone.c
+++ b/drivers/irqchip/irq-keystone.c
@@ -141,18 +141,11 @@ static int keystone_irq_probe(struct platform_device *pdev)
        if (!kirq)
                return -ENOMEM;
 
-       kirq->devctrl_regs =
-               syscon_regmap_lookup_by_phandle(np, "ti,syscon-dev");
+       kirq->devctrl_regs = syscon_regmap_lookup_by_phandle_args(np, "ti,syscon-dev",
+                                                                 1, &kirq->devctrl_offset);
        if (IS_ERR(kirq->devctrl_regs))
                return PTR_ERR(kirq->devctrl_regs);
 
-       ret = of_property_read_u32_index(np, "ti,syscon-dev", 1,
-                                        &kirq->devctrl_offset);
-       if (ret) {
-               dev_err(dev, "couldn't read the devctrl_offset offset!\n");
-               return ret;
-       }
-
        kirq->irq = platform_get_irq(pdev, 0);
        if (kirq->irq < 0)
                return kirq->irq;