On Tue, 01 Oct 2024, Lorenzo Bianconi wrote:
> From: Christian Marangi <ansuelsmth@xxxxxxxxx>
>
> Support for Airoha EN7581 Multi Function Device that
> expose PINCTRL functionality and PWM functionality.
The device is a jumble of pinctrl registers, some of which can oscillate.
This is *still* not an MFD.
If you wish to spread this functionality over 2 drivers, use syscon to
obtain the registers and simple-mfd to automatically probe the drivers.
> Signed-off-by: Christian Marangi <ansuelsmth@xxxxxxxxx>
> ---
> drivers/mfd/Kconfig | 8 ++++
> drivers/mfd/Makefile | 2 +
> drivers/mfd/airoha-en7581-gpio-mfd.c | 72 +++++++++++++++++++++++++++++++++++
> include/linux/mfd/airoha-en7581-mfd.h | 9 +++++
> 4 files changed, 91 insertions(+)
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index f9325bcce1b9..eca221351ab7 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -32,6 +32,14 @@ config MFD_ADP5585
> the core APIs _only_, you have to select individual components like
> the GPIO and PWM functions under the corresponding menus.
>
> +config MFD_AIROHA_EN7581
> + bool "Airoha EN7581 Multi Function Device"
> + depends on (ARCH_AIROHA || COMPILE_TEST) && OF
> + select MFD_CORE
> + help
> + Support for Airoha EN7581 Multi Function Device that
> + expose PINCTRL functionality and PWM functionality.
> +
> config MFD_ALTERA_A10SR
> bool "Altera Arria10 DevKit System Resource chip"
> depends on ARCH_INTEL_SOCFPGA && SPI_MASTER=y && OF
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 2a9f91e81af8..be8448e81a5b 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -257,6 +257,8 @@ obj-$(CONFIG_INTEL_SOC_PMIC_CHTWC) += intel_soc_pmic_chtwc.o
> obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI) += intel_soc_pmic_chtdc_ti.o
> obj-$(CONFIG_INTEL_SOC_PMIC_MRFLD) += intel_soc_pmic_mrfld.o
>
> +obj-$(CONFIG_MFD_AIROHA_EN7581) += airoha-en7581-gpio-mfd.o
> +
> obj-$(CONFIG_MFD_ALTERA_A10SR) += altera-a10sr.o
> obj-$(CONFIG_MFD_ALTERA_SYSMGR) += altera-sysmgr.o
> obj-$(CONFIG_MFD_STPMIC1) += stpmic1.o
> diff --git a/drivers/mfd/airoha-en7581-gpio-mfd.c b/drivers/mfd/airoha-en7581-gpio-mfd.c
> new file mode 100644
> index 000000000000..88407ce5747e
> --- /dev/null
> +++ b/drivers/mfd/airoha-en7581-gpio-mfd.c
> @@ -0,0 +1,72 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * MFD driver for Airoha EN7581
> + */
> +
> +#include <linux/io.h>
> +#include <linux/of.h>
> +#include <linux/mfd/airoha-en7581-mfd.h>
> +#include <linux/mfd/core.h>
> +#include <linux/module.h>
> +
> +static struct resource airoha_mfd_pinctrl_intr[] = {
> + {
> + .flags = IORESOURCE_IRQ,
> + },
> +};
> +
> +static const struct mfd_cell airoha_mfd_devs[] = {
> + {
> + .name = "pinctrl-airoha",
> + .resources = airoha_mfd_pinctrl_intr,
> + .num_resources = ARRAY_SIZE(airoha_mfd_pinctrl_intr),
> + }, {
> + .name = "pwm-airoha",
> + },
> +};
> +
> +static int airoha_mfd_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct airoha_mfd *mfd;
> + int irq;
> +
> + mfd = devm_kzalloc(dev, sizeof(*mfd), GFP_KERNEL);
> + if (!mfd)
> + return -ENOMEM;
> +
> + platform_set_drvdata(pdev, mfd);
> +
> + mfd->base = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(mfd->base))
> + return PTR_ERR(mfd->base);
> +
> + irq = platform_get_irq(pdev, 0);
> + if (irq < 0)
> + return irq;
> +
> + airoha_mfd_pinctrl_intr[0].start = irq;
> + airoha_mfd_pinctrl_intr[0].end = irq;
> +
> + return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, airoha_mfd_devs,
> + ARRAY_SIZE(airoha_mfd_devs), NULL, 0,
> + NULL);
> +}
> +
> +static const struct of_device_id airoha_mfd_of_match[] = {
> + { .compatible = "airoha,en7581-gpio-sysctl" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, airoha_mfd_of_match);
> +
> +static struct platform_driver airoha_mfd_driver = {
> + .probe = airoha_mfd_probe,
> + .driver = {
> + .name = KBUILD_MODNAME,
> + .of_match_table = airoha_mfd_of_match,
> + },
> +};
> +module_platform_driver(airoha_mfd_driver);
> +
> +MODULE_AUTHOR("Christian Marangi <ansuelsmth@xxxxxxxxx>");
> +MODULE_DESCRIPTION("Driver for Airoha EN7581 MFD");
> diff --git a/include/linux/mfd/airoha-en7581-mfd.h b/include/linux/mfd/airoha-en7581-mfd.h
> new file mode 100644
> index 000000000000..25e73952a777
> --- /dev/null
> +++ b/include/linux/mfd/airoha-en7581-mfd.h
> @@ -0,0 +1,9 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef _LINUX_INCLUDE_MFD_AIROHA_EN7581_MFD_H_
> +#define _LINUX_INCLUDE_MFD_AIROHA_EN7581_MFD_H_
> +
> +struct airoha_mfd {
> + void __iomem *base;
> +};
> +
> +#endif /* _LINUX_INCLUDE_MFD_AIROHA_EN7581_MFD_H_ */
>
> --
> 2.46.2
>
--
Lee Jones [李琼斯]
