[PATCH v3 11/15] clk: sunxi-ng: a523: add USB mod clocks

[Andre Przywara <andre.przywara@arm.com>]

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>
---
 drivers/clk/sunxi-ng/ccu-sun55i-a523.c | 57 ++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/drivers/clk/sunxi-ng/ccu-sun55i-a523.c b/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
index 7aa38bb2e6ba6..573c9885110a1 100644
--- a/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
+++ b/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
@@ -684,6 +684,59 @@ 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" },
@@ -869,6 +922,8 @@ 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,
@@ -960,6 +1015,8 @@ 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,
-- 
2.46.3