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Date: Tue, 13 Dec 2022 14:32:59 +0100 From: Herve Codina <herve.codina@...tlin.com> To: Geert Uytterhoeven <geert+renesas@...der.be>, Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Herve Codina <herve.codina@...tlin.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Magnus Damm <magnus.damm@...il.com>, Gareth Williams <gareth.williams.jx@...esas.com> Cc: linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org, Thomas Petazzoni <thomas.petazzoni@...tlin.com>, Miquel Raynal <miquel.raynal@...tlin.com> Subject: [PATCH v4 2/5] soc: renesas: r9a06g032-sysctrl: Handle h2mode setting based on USBF presence 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@...tlin.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be> --- drivers/clk/renesas/r9a06g032-clocks.c | 28 ++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) 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 ? -- 2.38.1
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