The usb role retrieved is determined from the CFG_USB[H2MODE]
value. The CFG_USB register is located within the system
controller.
We need a helper to get the usb role based on H2MODE value from
the CFG_USB register without syscon.
Signed-off-by: Herve Codina <herve.codina@xxxxxxxxxxx>
---
drivers/clk/renesas/r9a06g032-clocks.c | 18 ++++++++++++++++++
include/linux/soc/renesas/r9a06g032-sysctrl.h | 2 ++
2 files changed, 20 insertions(+)
diff --git a/drivers/clk/renesas/r9a06g032-clocks.c b/drivers/clk/renesas/r9a06g032-clocks.c
index 1488c9d6e639..9ee056498714 100644
--- a/drivers/clk/renesas/r9a06g032-clocks.c
+++ b/drivers/clk/renesas/r9a06g032-clocks.c
@@ -23,8 +23,11 @@
#include <linux/slab.h>
#include <linux/soc/renesas/r9a06g032-sysctrl.h>
#include <linux/spinlock.h>
+#include <linux/usb/role.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 {
@@ -341,6 +344,21 @@ int r9a06g032_sysctrl_set_dmamux(u32 mask, u32 val)
}
EXPORT_SYMBOL_GPL(r9a06g032_sysctrl_set_dmamux);
+
+/* Exported helper to get the H2MODE bit from USB register */
+int r9a06g032_sysctrl_get_usb_role(void)
+{
+ u32 usb;
+
+ if (!sysctrl_priv)
+ return -EPROBE_DEFER;
+
+ usb = readl(sysctrl_priv->reg + R9A06G032_SYSCTRL_USB);
+ return (usb & R9A06G032_SYSCTRL_USB_H2MODE) ?
+ USB_ROLE_HOST : USB_ROLE_DEVICE;
+}
+EXPORT_SYMBOL_GPL(r9a06g032_sysctrl_get_usb_role);
+
/* register/bit pairs are encoded as an uint16_t */
static void
clk_rdesc_set(struct r9a06g032_priv *clocks,
diff --git a/include/linux/soc/renesas/r9a06g032-sysctrl.h b/include/linux/soc/renesas/r9a06g032-sysctrl.h
index 066dfb15cbdd..fc18d013a498 100644
--- a/include/linux/soc/renesas/r9a06g032-sysctrl.h
+++ b/include/linux/soc/renesas/r9a06g032-sysctrl.h
@@ -4,8 +4,10 @@
#ifdef CONFIG_CLK_R9A06G032
int r9a06g032_sysctrl_set_dmamux(u32 mask, u32 val);
+int r9a06g032_sysctrl_get_usb_role(void);
#else
static inline int r9a06g032_sysctrl_set_dmamux(u32 mask, u32 val) { return -ENODEV; }
+static inline int r9a06g032_sysctrl_get_usb_role(void) { return -ENODEV; }
#endif
#endif /* __LINUX_SOC_RENESAS_R9A06G032_SYSCTRL_H__ */
--
2.38.1
