diff mbox series

[v2,4/5] clk: at91: sam9x60: Add initial setup of UPLL and USBCK rates

Message ID 20230308143954.1580743-5-claudiu.beznea@microchip.com
State Accepted
Commit c544e8181a3aa16b1661f52c9faaaa6cc713ba1d
Delegated to: Eugen Hristev
Headers show
Series Support the required clocks to enable USB on SAM9X60 | expand

Commit Message

Claudiu Beznea March 8, 2023, 2:39 p.m. UTC 
From: Sergiu Moga <sergiu.moga@microchip.com>

In order for some of the functionalities, such as the USB clocks,
to work properly we need some clocks to be properly initialised
at the very beginning of booting.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
 drivers/clk/at91/sam9x60.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
diff mbox series

Patch

diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c
index 14c2ffcac18b..e2f72446d500 100644
--- a/drivers/clk/at91/sam9x60.c
+++ b/drivers/clk/at91/sam9x60.c
@@ -378,6 +378,31 @@  static const struct {
 	{ .n = "dbgu_gclk",   .id = 47, },
 };
 
+/**
+ * Clock setup description
+ * @cid:	clock id corresponding to clock subsystem
+ * @pid:	parent clock id corresponding to clock subsystem
+ * @rate:	clock rate
+ * @prate:	parent rate
+ */
+static const struct pmc_clk_setup sam9x60_clk_setup[] = {
+	{
+		.cid = AT91_TO_CLK_ID(PMC_TYPE_CORE, ID_PLL_U_FRAC),
+		.rate = 960000000,
+	},
+
+	{
+		.cid = AT91_TO_CLK_ID(PMC_TYPE_CORE, ID_PLL_U_DIV),
+		.rate = 480000000,
+	},
+
+	{
+		.cid = AT91_TO_CLK_ID(PMC_TYPE_CORE, ID_USBCK),
+		.pid = AT91_TO_CLK_ID(PMC_TYPE_CORE, ID_PLL_U_DIV),
+		.rate = 48000000,
+	},
+};
+
 #define prepare_mux_table(_allocs, _index, _dst, _src, _num, _label)	\
 	do {								\
 		int _i;							\
@@ -668,6 +693,11 @@  static int sam9x60_clk_probe(struct udevice *dev)
 		clk_dm(AT91_TO_CLK_ID(PMC_TYPE_GCK, sam9x60_gck[i].id), c);
 	}
 
+	/* Setup clocks. */
+	ret = at91_clk_setup(sam9x60_clk_setup, ARRAY_SIZE(sam9x60_clk_setup));
+	if (ret)
+		goto fail;
+
 	return 0;
 
 fail: