The dwc pwm controller can be used in non-PCI systems, so allow
either platform or OF based probing.
Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxx>
---
v3:
- changed compatible name
---
drivers/pwm/Kconfig | 5 ++--
drivers/pwm/pwm-dwc.c | 53 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 56 insertions(+), 2 deletions(-)
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 60d13a949bc5..b8717877a524 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -176,9 +176,10 @@ config PWM_CROS_EC
config PWM_DWC
tristate "DesignWare PWM Controller"
- depends on PCI
+ depends on PCI || OF
help
- PWM driver for Synopsys DWC PWM Controller attached to a PCI bus.
+ PWM driver for Synopsys DWC PWM Controller attached to either a
+ PCI or platform bus.
To compile this driver as a module, choose M here: the module
will be called pwm-dwc.
diff --git a/drivers/pwm/pwm-dwc.c b/drivers/pwm/pwm-dwc.c
index 61f11e0a9319..d5f2df6fee62 100644
--- a/drivers/pwm/pwm-dwc.c
+++ b/drivers/pwm/pwm-dwc.c
@@ -18,6 +18,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
+#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/pwm.h>
@@ -319,6 +320,58 @@ static struct pci_driver dwc_pwm_driver = {
module_pci_driver(dwc_pwm_driver);
+#ifdef CONFIG_OF
+static int dwc_pwm_plat_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct dwc_pwm *dwc;
+ int ret;
+
+ dwc = dwc_pwm_alloc(dev);
+ if (!dwc)
+ return -ENOMEM;
+
+ dwc->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(dwc->base))
+ return dev_err_probe(dev, PTR_ERR(dwc->base),
+ "failed to map IO\n");
+
+ ret = pwmchip_add(&dwc->chip);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int dwc_pwm_plat_remove(struct platform_device *pdev)
+{
+ struct dwc_pwm *dwc = platform_get_drvdata(pdev);
+
+ pwmchip_remove(&dwc->chip);
+ return 0;
+}
+
+static const struct of_device_id dwc_pwm_dt_ids[] = {
+ { .compatible = "snps,dw-apb-timers-pwm2" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, dwc_pwm_dt_ids);
+
+static struct platform_driver dwc_pwm_plat_driver = {
+ .driver = {
+ .name = "dwc-pwm",
+ .of_match_table = dwc_pwm_dt_ids,
+ },
+ .probe = dwc_pwm_plat_probe,
+ .remove = dwc_pwm_plat_remove,
+};
+
+module_platform_driver(dwc_pwm_plat_driver);
+
+MODULE_ALIAS("platform:dwc-pwm");
+#endif /* CONFIG_OF */
+
+
MODULE_AUTHOR("Felipe Balbi (Intel)");
MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx>");
MODULE_AUTHOR("Raymond Tan <raymond.tan@xxxxxxxxx>");
--
2.35.1
