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Subject[PATCH 3/4] pwm: jz4740: Add support for devicetree
Date
Add support for probing the pwm-jz4740 directly from devicetree.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
.../devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt | 25 ++++++++++++++++++++++
drivers/pwm/pwm-jz4740.c | 14 ++++++++++++
2 files changed, 39 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt

diff --git a/Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt b/Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt
new file mode 100644
index 000000000000..7d9d3f90641b
--- /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 6539c001fe32..a7b134af5e04 100644
--- 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,
--
2.11.0
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