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clk: renesas: r9a06g032: Handle h2mode setting based on USBF presence

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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>
Link: https://lore.kernel.org/r/20230105152257.310642-3-herve.codina@bootlin.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
Herve Codina 2023-01-05 16:22:54 +01:00 committed by Geert Uytterhoeven
parent fbfd614aea
commit d4638642aa
1 changed files with 28 additions and 0 deletions
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28
drivers/clk/renesas/r9a06g032-clocks.c
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@ -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 {
@ -918,6 +920,29 @@ 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;
@ -947,6 +972,9 @@ 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 ?