[PATCH v6 3/3] usb: chipidea: Add support for NPCM
Tomer Maimon
tmaimon77 at gmail.com
Mon Oct 16 04:21:51 AEDT 2023
Hi Paul,
Thanks for your comments
On Fri, 13 Oct 2023 at 16:18, Paul Menzel <pmenzel at molgen.mpg.de> wrote:
>
> Dear Tomer,
>
>
> Thank you for your patch.
>
> Am 13.10.23 um 01:00 schrieb Tomer Maimon:
> > Add Nuvoton NPCM BMC SoCs support to USB ChipIdea driver.
> > NPCM SoC include ChipIdea IP block that used for USB device controller
>
> include*s*
> “that *is* used” or just “… used for”
Will do
>
> > mode.
>
> Please add a line, how you tested this patch.
I don't recall "how you tested the patch" done in the commit message,
I can add it in the cover letter
>
> > Signed-off-by: Tomer Maimon <tmaimon77 at gmail.com>
> > Acked-by: Peter Chen <peter.chen at kernel.org>
> > ---
> > drivers/usb/chipidea/Kconfig | 4 +
> > drivers/usb/chipidea/Makefile | 1 +
> > drivers/usb/chipidea/ci_hdrc_npcm.c | 114 ++++++++++++++++++++++++++++
> > 3 files changed, 119 insertions(+)
> > create mode 100644 drivers/usb/chipidea/ci_hdrc_npcm.c
> >
> > diff --git a/drivers/usb/chipidea/Kconfig b/drivers/usb/chipidea/Kconfig
> > index c815824a0b2d..bab45bc62361 100644
> > --- a/drivers/usb/chipidea/Kconfig
> > +++ b/drivers/usb/chipidea/Kconfig
> > @@ -43,6 +43,10 @@ config USB_CHIPIDEA_MSM
> > tristate "Enable MSM hsusb glue driver" if EXPERT
> > default USB_CHIPIDEA
> >
> > +config USB_CHIPIDEA_NPCM
> > + tristate "Enable NPCM hsusb glue driver" if EXPERT
> > + default USB_CHIPIDEA
> > +
> > config USB_CHIPIDEA_IMX
> > tristate "Enable i.MX USB glue driver" if EXPERT
> > depends on OF
> > diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
> > index 71afeab97e83..718cb24603dd 100644
> > --- a/drivers/usb/chipidea/Makefile
> > +++ b/drivers/usb/chipidea/Makefile
> > @@ -13,6 +13,7 @@ ci_hdrc-$(CONFIG_USB_OTG_FSM) += otg_fsm.o
> >
> > obj-$(CONFIG_USB_CHIPIDEA_GENERIC) += ci_hdrc_usb2.o
> > obj-$(CONFIG_USB_CHIPIDEA_MSM) += ci_hdrc_msm.o
> > +obj-$(CONFIG_USB_CHIPIDEA_NPCM) += ci_hdrc_npcm.o
> > obj-$(CONFIG_USB_CHIPIDEA_PCI) += ci_hdrc_pci.o
> > obj-$(CONFIG_USB_CHIPIDEA_IMX) += usbmisc_imx.o ci_hdrc_imx.o
> > obj-$(CONFIG_USB_CHIPIDEA_TEGRA) += ci_hdrc_tegra.o
> > diff --git a/drivers/usb/chipidea/ci_hdrc_npcm.c b/drivers/usb/chipidea/ci_hdrc_npcm.c
> > new file mode 100644
> > index 000000000000..37b64a3dbd96
> > --- /dev/null
> > +++ b/drivers/usb/chipidea/ci_hdrc_npcm.c
> > @@ -0,0 +1,114 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +// Copyright (c) 2023 Nuvoton Technology corporation.
> > +
> > +#include <linux/module.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/pm_runtime.h>
> > +#include <linux/usb/chipidea.h>
> > +#include <linux/clk.h>
> > +#include <linux/io.h>
> > +#include <linux/reset-controller.h>
> > +#include <linux/of.h>
> > +
> > +#include "ci.h"
> > +
> > +struct npcm_udc_data {
> > + struct platform_device *ci;
> > + struct clk *core_clk;
> > + struct ci_hdrc_platform_data pdata;
> > +};
> > +
> > +static int npcm_udc_notify_event(struct ci_hdrc *ci, unsigned event)
> > +{
> > + struct device *dev = ci->dev->parent;
> > +
> > + switch (event) {
> > + case CI_HDRC_CONTROLLER_RESET_EVENT:
> > + /* clear all mode bits */
> > + hw_write(ci, OP_USBMODE, 0xffffffff, 0x0);
> > + break;
> > + default:
> > + dev_dbg(dev, "unknown ci_hdrc event\n");
>
> Please print it out.
Do you mean instead dev_dbg to use dev_info? in that case, each event
that didnt handled will cause a print.
>
> > + break;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int npcm_udc_probe(struct platform_device *pdev)
> > +{
> > + int ret;
> > + struct npcm_udc_data *ci;
> > + struct platform_device *plat_ci;
> > + struct device *dev = &pdev->dev;
> > +
> > + ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL);
> > + if (!ci)
> > + return -ENOMEM;
> > + platform_set_drvdata(pdev, ci);
> > +
> > + ci->core_clk = devm_clk_get_optional(dev, NULL);
> > + if (IS_ERR(ci->core_clk))
> > + return PTR_ERR(ci->core_clk);
> > +
> > + ret = clk_prepare_enable(ci->core_clk);
> > + if (ret)
> > + return dev_err_probe(dev, ret, "failed to enable the clock: %d\n", ret);
> > +
> > + ci->pdata.name = dev_name(dev);
> > + ci->pdata.capoffset = DEF_CAPOFFSET;
> > + ci->pdata.flags = CI_HDRC_REQUIRES_ALIGNED_DMA |
> > + CI_HDRC_FORCE_VBUS_ACTIVE_ALWAYS;
> > + ci->pdata.phy_mode = USBPHY_INTERFACE_MODE_UTMI;
> > + ci->pdata.notify_event = npcm_udc_notify_event;
> > +
> > + plat_ci = ci_hdrc_add_device(dev, pdev->resource, pdev->num_resources,
> > + &ci->pdata);
> > + if (IS_ERR(plat_ci)) {
> > + ret = PTR_ERR(plat_ci);
> > + dev_err(dev, "failed to register HDRC NPCM device: %d\n", ret);
> > + goto clk_err;
> > + }
> > +
> > + pm_runtime_no_callbacks(dev);
> > + pm_runtime_enable(dev);
> > +
> > + return 0;
> > +
> > +clk_err:
> > + clk_disable_unprepare(ci->core_clk);
> > + return ret;
> > +}
> > +
> > +static int npcm_udc_remove(struct platform_device *pdev)
> > +{
> > + struct npcm_udc_data *ci = platform_get_drvdata(pdev);
> > +
> > + pm_runtime_disable(&pdev->dev);
> > + ci_hdrc_remove_device(ci->ci);
> > + clk_disable_unprepare(ci->core_clk);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct of_device_id npcm_udc_dt_match[] = {
> > + { .compatible = "nuvoton,npcm750-udc", },
> > + { .compatible = "nuvoton,npcm845-udc", },
> > + { }
> > +};
> > +MODULE_DEVICE_TABLE(of, npcm_udc_dt_match);
> > +
> > +static struct platform_driver npcm_udc_driver = {
> > + .probe = npcm_udc_probe,
> > + .remove = npcm_udc_remove,
> > + .driver = {
> > + .name = "npcm_udc",
> > + .of_match_table = npcm_udc_dt_match,
> > + },
> > +};
> > +
> > +module_platform_driver(npcm_udc_driver);
> > +
> > +MODULE_DESCRIPTION("NPCM USB device controller driver");
> > +MODULE_AUTHOR("Tomer Maimon <tomer.maimon at nuvoton.com>");
>
> Should that address also be recorded as the patch author?
I prefer to use this e-mail since this is my main e-mail.
>
> > +MODULE_LICENSE("GPL v2");
>
>
> Kind regards,
>
> Paul
Best regards,
Tomer
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