[v4,5/7] clk: axi-clkgen: Respect ZYNQMP PFD/VCO frequency limits

Commit Message

Alexandru Ardelean Sept. 29, 2020, 2:44 p.m. UTC

From: Mathias Tausen <[e-mail]>

Since axi-clkgen is now supported on ZYNQMP, make sure the max/min
frequencies of the PFD and VCO are respected.

Signed-off-by: Mathias Tausen <[e-mail]>
Signed-off-by: Alexandru Ardelean <[e-mail]>
---
 drivers/clk/clk-axi-clkgen.c | 9 +++++++++
 1 file changed, 9 insertions(+)

Patch

diff --git a/drivers/clk/clk-axi-clkgen.c b/drivers/clk/clk-axi-clkgen.c
index 4342b7735590..2319bb1c5c08 100644
--- a/drivers/clk/clk-axi-clkgen.c
+++ b/drivers/clk/clk-axi-clkgen.c
@@ -108,12 +108,21 @@  static uint32_t axi_clkgen_lookup_lock(unsigned int m)
 	return 0x1f1f00fa;
 }
 
+#ifdef ARCH_ZYNQMP
+static const struct axi_clkgen_limits axi_clkgen_default_limits = {
+	.fpfd_min = 10000,
+	.fpfd_max = 450000,
+	.fvco_min = 800000,
+	.fvco_max = 1600000,
+};
+#else
 static const struct axi_clkgen_limits axi_clkgen_default_limits = {
 	.fpfd_min = 10000,
 	.fpfd_max = 300000,
 	.fvco_min = 600000,
 	.fvco_max = 1200000,
 };
+#endif
 
 static void axi_clkgen_calc_params(const struct axi_clkgen_limits *limits,
 	unsigned long fin, unsigned long fout,