Add snps,pwm-number property to indicate if the block does not have
all 8 of the PWM blocks.
Not sure if this should be a general PWM property consider optional
for all PWM types, so have added a specific one here (there is only
one other controller with a property for PWM count at the moment)
Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxx>
---
Documentation/devicetree/bindings/pwm/pwm-synposys.yaml | 5 +++++
drivers/pwm/pwm-dwc.c | 8 ++++++++
2 files changed, 13 insertions(+)
diff --git a/Documentation/devicetree/bindings/pwm/pwm-synposys.yaml b/Documentation/devicetree/bindings/pwm/pwm-synposys.yaml
index 38ac0da75272..15bdf764b46a 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-synposys.yaml
+++ b/Documentation/devicetree/bindings/pwm/pwm-synposys.yaml
@@ -30,11 +30,16 @@ properties:
- items:
- const: snps,pwm
+ snps,pwm-number:
+ $ref: '/schemas/types.yaml#/definitions/uint32'
+ description: u32 value representing the number of PWM devices
+
required:
- "#pwm-cells"
- compatible
- reg
- clocks
- clock-names
+ - snps,pwm-number
additionalProperties: false
diff --git a/drivers/pwm/pwm-dwc.c b/drivers/pwm/pwm-dwc.c
index 6a4364a5d137..abdde83452ad 100644
--- a/drivers/pwm/pwm-dwc.c
+++ b/drivers/pwm/pwm-dwc.c
@@ -328,12 +328,20 @@ static int dwc_pwm_plat_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct dwc_pwm *dwc;
+ u32 nr_pwm;
int ret;
dwc = dwc_pwm_alloc(dev);
if (!dwc)
return -ENOMEM;
+ if (!device_property_read_u32(dev, "snps,pwm-number", &nr_pwm)) {
+ if (nr_pwm > DWC_TIMERS_TOTAL)
+ dev_err(dev, "too many PWMs specified (%d)\n", nr_pwm);
+ else
+ dwc->chip.npwm = nr_pwm;
+ }
+
dwc->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(dwc->base))
return dev_err_probe(dev, PTR_ERR(dwc->base),
--
2.35.1
