On Fri, Dec 8, 2023 at 3:42 AM William Qiu <william.qiu@xxxxxxxxxxxxxxxx> wrote: > > Add driver for OpenCores PWM Controller. And add compatibility code > which based on StarFive SoC. > > Co-developed-by: Hal Feng <hal.feng@xxxxxxxxxxxxxxxx> > Signed-off-by: Hal Feng <hal.feng@xxxxxxxxxxxxxxxx> > Signed-off-by: William Qiu <william.qiu@xxxxxxxxxxxxxxxx> > --- > MAINTAINERS | 7 ++ > drivers/pwm/Kconfig | 12 ++ > drivers/pwm/Makefile | 1 + > drivers/pwm/pwm-ocores.c | 229 +++++++++++++++++++++++++++++++++++++++ > 4 files changed, 249 insertions(+) > create mode 100644 drivers/pwm/pwm-ocores.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 788be9ab5b73..7a11a22da09e 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -16204,6 +16204,13 @@ F: Documentation/i2c/busses/i2c-ocores.rst > F: drivers/i2c/busses/i2c-ocores.c > F: include/linux/platform_data/i2c-ocores.h > > +OPENCORES PWM DRIVER > +M: William Qiu <william.qiu@xxxxxxxxxxxxxxxx> > +M: Hal Feng <hal.feng@xxxxxxxxxxxxxxxx> > +S: Supported > +F: Documentation/devicetree/bindings/pwm/opencores,pwm.yaml > +F: drivers/pwm/pwm-ocores.c > + > OPENRISC ARCHITECTURE > M: Jonas Bonn <jonas@xxxxxxxxxxxx> > M: Stefan Kristiansson <stefan.kristiansson@xxxxxxxxxxxxx> > diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig > index 4b956d661755..d87e1bb350ba 100644 > --- a/drivers/pwm/Kconfig > +++ b/drivers/pwm/Kconfig > @@ -444,6 +444,18 @@ config PWM_NTXEC > controller found in certain e-book readers designed by the original > design manufacturer Netronix. > > +config PWM_OCORES > + tristate "OpenCores PWM support" > + depends on HAS_IOMEM && OF > + depends on COMMON_CLK && RESET_CONTROLLER > + depends on ARCH_STARFIVE || COMPILE_TEST > + help > + If you say yes to this option, support will be included for the > + OpenCores PWM. For details see https://opencores.org/projects/ptc. > + > + To compile this driver as a module, choose M here: the module > + will be called pwm-ocores. > + > config PWM_OMAP_DMTIMER > tristate "OMAP Dual-Mode Timer PWM support" > depends on OF > diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile > index c5ec9e168ee7..517c4f643058 100644 > --- a/drivers/pwm/Makefile > +++ b/drivers/pwm/Makefile > @@ -40,6 +40,7 @@ obj-$(CONFIG_PWM_MICROCHIP_CORE) += pwm-microchip-core.o > obj-$(CONFIG_PWM_MTK_DISP) += pwm-mtk-disp.o > obj-$(CONFIG_PWM_MXS) += pwm-mxs.o > obj-$(CONFIG_PWM_NTXEC) += pwm-ntxec.o > +obj-$(CONFIG_PWM_OCORES) += pwm-ocores.o > obj-$(CONFIG_PWM_OMAP_DMTIMER) += pwm-omap-dmtimer.o > obj-$(CONFIG_PWM_PCA9685) += pwm-pca9685.o > obj-$(CONFIG_PWM_PXA) += pwm-pxa.o > diff --git a/drivers/pwm/pwm-ocores.c b/drivers/pwm/pwm-ocores.c > new file mode 100644 > index 000000000000..996ca3805901 > --- /dev/null > +++ b/drivers/pwm/pwm-ocores.c > @@ -0,0 +1,229 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * OpenCores PWM Driver > + * > + * https://opencores.org/projects/ptc > + * > + * Copyright (C) 2018-2023 StarFive Technology Co., Ltd. > + * > + * Limitations: > + * - The hardware only do inverted polarity. > + * - The hardware minimum period / duty_cycle is (1 / pwm_apb clock frequency) ns. > + * - The hardware maximum period / duty_cycle is (U32_MAX / pwm_apb clock frequency) ns. > + */ > + > +#include <linux/clk.h> > +#include <linux/io.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_device.h> You probably don't need this header and the implicit includes it makes are dropped now in linux-next. Please check what you actually need and make them explicit. Rob
