pwm: jz4740: Add support for devicetree

Add support for probing the pwm-jz4740 directly from devicetree.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

diff --git a/Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt b/Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt
new file mode 100644 (file)
index 0000000..7d9d3f9
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt
@@ -0,0 +1,25 @@
+Ingenic JZ47xx PWM Controller
+=============================
+
+Required properties:
+- compatible: One of:
+  * "ingenic,jz4740-pwm"
+  * "ingenic,jz4770-pwm"
+  * "ingenic,jz4780-pwm"
+- #pwm-cells: Should be 3. See pwm.txt in this directory for a description
+  of the cells format.
+- clocks : phandle to the external clock.
+- clock-names : Should be "ext".
+
+
+Example:
+
+       pwm: pwm@10002000 {
+               compatible = "ingenic,jz4740-pwm";
+               reg = <0x10002000 0x1000>;
+
+               #pwm-cells = <3>;
+
+               clocks = <&ext>;
+               clock-names = "ext";
+       };

diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c
index 6539c001fe32833692a5ff341e968c97aadfc3d8..a7b134af5e0495786fc553367c9a867ab816dbcd 100644 (file)
--- a/drivers/pwm/pwm-jz4740.c
+++ b/drivers/pwm/pwm-jz4740.c
@@ -18,6 +18,7 @@
 #include <linux/gpio.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pwm.h>
 
@@ -174,6 +175,8 @@ static int jz4740_pwm_probe(struct platform_device *pdev)
        jz4740->chip.ops = &jz4740_pwm_ops;
        jz4740->chip.npwm = NUM_PWM;
        jz4740->chip.base = -1;
+       jz4740->chip.of_xlate = of_pwm_xlate_with_flags;
+       jz4740->chip.of_pwm_n_cells = 3;
 
        platform_set_drvdata(pdev, jz4740);
 
@@ -187,9 +190,20 @@ static int jz4740_pwm_remove(struct platform_device *pdev)
        return pwmchip_remove(&jz4740->chip);
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id jz4740_pwm_dt_ids[] = {
+       { .compatible = "ingenic,jz4740-pwm", },
+       { .compatible = "ingenic,jz4770-pwm", },
+       { .compatible = "ingenic,jz4780-pwm", },
+       {},
+};
+MODULE_DEVICE_TABLE(of, jz4740_pwm_dt_ids);
+#endif
+
 static struct platform_driver jz4740_pwm_driver = {
        .driver = {
                .name = "jz4740-pwm",
+               .of_match_table = of_match_ptr(jz4740_pwm_dt_ids),
        },
        .probe = jz4740_pwm_probe,
        .remove = jz4740_pwm_remove,