diff mbox series

[v2,10/15] clk: sunxi-ng: a523: add USB mod clocks

Message ID 20250214125359.5204-11-andre.przywara@arm.com (mailing list archive)
State Under Review
Headers show
Series clk: sunxi-ng: add A523 clock support | expand

Commit Message

Andre Przywara Feb. 14, 2025, 12:53 p.m. UTC 
Add the clocks driving the USB subsystem: this just covers the two
clocks creating the 12 MHz rate for the OHCI (USB 1.x) device. The rest
of the USB clocks are either gate clocks (added later) or created
internal to the USB IP.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
 drivers/clk/sunxi-ng/ccu-sun55i-a523.c | 57 ++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

Comments

Jernej Škrabec Feb. 18, 2025, 7:46 p.m. UTC | #1 
Dne petek, 14. februar 2025 ob 13:53:54 Srednjeevropski standardni čas je Andre Przywara napisal(a):
> Add the clocks driving the USB subsystem: this just covers the two
> clocks creating the 12 MHz rate for the OHCI (USB 1.x) device. The rest
> of the USB clocks are either gate clocks (added later) or created
> internal to the USB IP.
> 
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>

Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Best regards,
Jernej
diff mbox series

Patch

diff --git a/drivers/clk/sunxi-ng/ccu-sun55i-a523.c b/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
index 14d13fb16dfbb..59cc31f89ae77 100644
--- a/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
+++ b/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
@@ -667,6 +667,59 @@  static SUNXI_CCU_M_WITH_GATE(gpadc1_clk, "gpadc1", "hosc", 0x9e4,
 				 BIT(31),	/* gate */
 				 0);
 
+/*
+ * The first parent is a 48 MHz input clock divided by 4. That 48 MHz clock is
+ * a 2x multiplier from osc24M synchronized by pll-periph0, and is also used by
+ * the OHCI module.
+ */
+static const struct clk_parent_data usb_ohci_parents[] = {
+	{ .hw = &pll_periph0_4x_clk.common.hw },
+	{ .fw_name = "hosc" },
+	{ .fw_name = "losc" },
+	{ .fw_name = "iosc" },
+};
+static const struct ccu_mux_fixed_prediv usb_ohci_predivs[] = {
+	{ .index = 0, .div = 50 },
+	{ .index = 1, .div = 2 },
+};
+
+static struct ccu_mux usb_ohci0_clk = {
+	.enable		= BIT(31),
+	.mux		= {
+		.shift		= 24,
+		.width		= 2,
+		.fixed_predivs	= usb_ohci_predivs,
+		.n_predivs	= ARRAY_SIZE(usb_ohci_predivs),
+	},
+	.common		= {
+		.reg		= 0xa70,
+		.features	= CCU_FEATURE_FIXED_PREDIV,
+		.hw.init	= CLK_HW_INIT_PARENTS_DATA("usb-ohci0",
+							   usb_ohci_parents,
+							   &ccu_mux_ops,
+							   0),
+	},
+};
+
+static struct ccu_mux usb_ohci1_clk = {
+	.enable		= BIT(31),
+	.mux		= {
+		.shift		= 24,
+		.width		= 2,
+		.fixed_predivs	= usb_ohci_predivs,
+		.n_predivs	= ARRAY_SIZE(usb_ohci_predivs),
+	},
+	.common		= {
+		.reg		= 0xa74,
+		.features	= CCU_FEATURE_FIXED_PREDIV,
+		.hw.init	= CLK_HW_INIT_PARENTS_DATA("usb-ohci1",
+							   usb_ohci_parents,
+							   &ccu_mux_ops,
+							   0),
+	},
+};
+
+
 static const struct clk_parent_data losc_hosc_parents[] = {
 	{ .fw_name = "hosc" },
 	{ .fw_name = "losc" },
@@ -838,6 +891,8 @@  static struct ccu_common *sun55i_a523_ccu_clks[] = {
 	&ir_tx_clk.common,
 	&gpadc0_clk.common,
 	&gpadc1_clk.common,
+	&usb_ohci0_clk.common,
+	&usb_ohci1_clk.common,
 	&pcie_aux_clk.common,
 	&hdmi_24M_clk.common,
 	&hdmi_cec_32k_clk.common,
@@ -927,6 +982,8 @@  static struct clk_hw_onecell_data sun55i_a523_hw_clks = {
 		[CLK_IR_TX]		= &ir_tx_clk.common.hw,
 		[CLK_GPADC0]		= &gpadc0_clk.common.hw,
 		[CLK_GPADC1]		= &gpadc1_clk.common.hw,
+		[CLK_USB_OHCI0]		= &usb_ohci0_clk.common.hw,
+		[CLK_USB_OHCI1]		= &usb_ohci1_clk.common.hw,
 		[CLK_PCIE_AUX]		= &pcie_aux_clk.common.hw,
 		[CLK_HDMI_24M]		= &hdmi_24M_clk.common.hw,
 		[CLK_HDMI_CEC_32K]	= &hdmi_cec_32k_clk.common.hw,