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Message-Id: <20221213133302.218955-3-herve.codina@bootlin.com>
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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