| Message ID | 20221207162435.1001782-7-herve.codina@bootlin.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add the Renesas USBF controller support | expand |
On Wed, Dec 7, 2022 at 5:24 PM Herve Codina <herve.codina@bootlin.com> wrote: > The CFG_USB[H2MODE] allows to switch the USB configuration. The > configuration supported are: > - One host and one device > or > - Two hosts > > Set CFG_USB[H2MODE] based on the USBF controller (USB device) > availability. > > Signed-off-by: Herve Codina <herve.codina@bootlin.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
Hi Geert, On Thu, 8 Dec 2022 10:05:28 +0100 Geert Uytterhoeven <geert@linux-m68k.org> wrote: > On Wed, Dec 7, 2022 at 5:24 PM Herve Codina <herve.codina@bootlin.com> wrote: > > The CFG_USB[H2MODE] allows to switch the USB configuration. The > > configuration supported are: > > - One host and one device > > or > > - Two hosts > > > > Set CFG_USB[H2MODE] based on the USBF controller (USB device) > > availability. > > > > Signed-off-by: Herve Codina <herve.codina@bootlin.com> > > Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> > Will be added in v4. Thanks for the review, Hervé
diff --git a/drivers/clk/renesas/r9a06g032-clocks.c b/drivers/clk/renesas/r9a06g032-clocks.c index 1488c9d6e639..8a09ba79b97f 100644 --- a/drivers/clk/renesas/r9a06g032-clocks.c +++ b/drivers/clk/renesas/r9a06g032-clocks.c @@ -25,6 +25,8 @@ #include <linux/spinlock.h> #include <dt-bindings/clock/r9a06g032-sysctrl.h> +#define R9A06G032_SYSCTRL_USB 0x00 +#define R9A06G032_SYSCTRL_USB_H2MODE (1<<1) #define R9A06G032_SYSCTRL_DMAMUX 0xA0 struct r9a06g032_gate { @@ -919,6 +921,29 @@ static void r9a06g032_clocks_del_clk_provider(void *data) of_clk_del_provider(data); } +static void __init r9a06g032_init_h2mode(struct r9a06g032_priv *clocks) +{ + struct device_node *usbf_np = NULL; + u32 usb; + + while ((usbf_np = of_find_compatible_node(usbf_np, NULL, + "renesas,rzn1-usbf"))) { + if (of_device_is_available(usbf_np)) + break; + } + + usb = readl(clocks->reg + R9A06G032_SYSCTRL_USB); + if (usbf_np) { + /* 1 host and 1 device mode */ + usb &= ~R9A06G032_SYSCTRL_USB_H2MODE; + of_node_put(usbf_np); + } else { + /* 2 hosts mode */ + usb |= R9A06G032_SYSCTRL_USB_H2MODE; + } + writel(usb, clocks->reg + R9A06G032_SYSCTRL_USB); +} + static int __init r9a06g032_clocks_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -948,6 +973,9 @@ static int __init r9a06g032_clocks_probe(struct platform_device *pdev) clocks->reg = of_iomap(np, 0); if (WARN_ON(!clocks->reg)) return -ENOMEM; + + r9a06g032_init_h2mode(clocks); + for (i = 0; i < ARRAY_SIZE(r9a06g032_clocks); ++i) { const struct r9a06g032_clkdesc *d = &r9a06g032_clocks[i]; const char *parent_name = d->source ?
The CFG_USB[H2MODE] allows to switch the USB configuration. The configuration supported are: - One host and one device or - Two hosts Set CFG_USB[H2MODE] based on the USBF controller (USB device) availability. Signed-off-by: Herve Codina <herve.codina@bootlin.com> --- drivers/clk/renesas/r9a06g032-clocks.c | 28 ++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)