[PATCH v2 7/7] clk: stm32mp25: add ck_ker_usb2phy1_stp clock

[Gabriel Fernandez]

Add the ck_ker_usb2phy1_stp clock required for USB Host (USBH) low power
support.

Set hse_ker_ck as the parent clock of ck_ker_usb2phy1_stp to ensure it
remains active during the low power modes. As this input clock is optional
in the binding, it must be described in the device tree for the parent to
be effective.

Update the number of clocks of the provider to cover the new ID.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@xxxxxxxxxxx>
---
 drivers/clk/stm32/clk-stm32mp25.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/stm32/clk-stm32mp25.c b/drivers/clk/stm32/clk-stm32mp25.c
index a6a1293370eb..8bd9eaa42b5d 100644
--- a/drivers/clk/stm32/clk-stm32mp25.c
+++ b/drivers/clk/stm32/clk-stm32mp25.c
@@ -18,7 +18,7 @@
 #include <dt-bindings/reset/st,stm32mp25-rcc.h>
 
 /* Number of clock identifiers of the binding, SCMI ones excluded: highest ID + 1 */
-#define STM32MP25_LAST_CLK	(CK_SPI8_AM + 1)
+#define STM32MP25_LAST_CLK	(CK_KER_USB2PHY1STP + 1)
 
 /* Clock security definition */
 #define SECF_NONE		-1
@@ -356,6 +356,7 @@ enum enum_gate_cfg {
 	GATE_USART6,
 	GATE_USBH,
 	GATE_USB2PHY1,
+	GATE_USB2PHY1STP,
 	GATE_USB2PHY2,
 	GATE_USB3DR,
 	GATE_USB3PCIEPHY,
@@ -506,6 +507,7 @@ static const struct stm32_gate_cfg stm32mp25_gates[GATE_NB] = {
 	GATE_CFG(GATE_USART6,		RCC_USART6CFGR,		1,	0),
 	GATE_CFG(GATE_USBH,		RCC_USBHCFGR,		1,	0),
 	GATE_CFG(GATE_USB2PHY1,		RCC_USB2PHY1CFGR,	1,	0),
+	GATE_CFG(GATE_USB2PHY1STP,	RCC_USB2PHY1CFGR,	4,	0),
 	GATE_CFG(GATE_USB2PHY2,		RCC_USB2PHY2CFGR,	1,	0),
 	GATE_CFG(GATE_USB3DR,		RCC_USB3DRCFGR,		1,	0),
 	GATE_CFG(GATE_USB3PCIEPHY,	RCC_USB3PCIEPHYCFGR,	1,	0),
@@ -1635,6 +1637,13 @@ static struct clk_stm32_composite ck_ker_usb2phy1 = {
 					    &clk_stm32_composite_ops, 0),
 };
 
+/* Parent clock of ck_ker_usb2phy1_stp is HSE_KER_ON to ensure it remains active during low power */
+static struct clk_stm32_gate ck_ker_usb2phy1_stp = {
+	.gate_id = GATE_USB2PHY1STP,
+	.hw.init = CLK_HW_INIT_INDEX("ck_ker_usb2phy1_stp", HSE_KER_ON,
+				     &clk_stm32_gate_ops, 0),
+};
+
 /* USB2H */
 static struct clk_stm32_gate ck_icn_m_usb2ehci = {
 	.gate_id = GATE_USBH,
@@ -1993,6 +2002,7 @@ static const struct clock_config stm32mp25_clock_cfg[] = {
 	STM32_COMPOSITE_CFG(CK_KER_ADC12,	ck_ker_adc12,		SEC_RIFSC(58)),
 	STM32_COMPOSITE_CFG(CK_KER_ADC3,	ck_ker_adc3,		SEC_RIFSC(59)),
 	STM32_COMPOSITE_CFG(CK_KER_USB2PHY1,	ck_ker_usb2phy1,	SEC_RIFSC(63)),
+	STM32_GATE_CFG(CK_KER_USB2PHY1STP,	ck_ker_usb2phy1_stp,	SEC_RIFSC(63)),
 	STM32_GATE_CFG(CK_KER_USB2PHY2,		ck_ker_usb2phy2,	SEC_RIFSC(63)),
 	STM32_COMPOSITE_CFG(CK_KER_USB2PHY2EN,	ck_ker_usb2phy2_en,	SEC_RIFSC(63)),
 	STM32_COMPOSITE_CFG(CK_KER_USB3PCIEPHY,	ck_ker_usb3pciephy,	SEC_RIFSC(67)),

-- 
2.43.0