[v2,4/6] clk: axi-clkgen: Respect ZYNQMP PFD/VCO frequency limits

Commit Message

Alexandru Ardelean Aug. 10, 2020, 1:42 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 | 7 +++++++
 1 file changed, 7 insertions(+)

Patch

diff --git a/drivers/clk/clk-axi-clkgen.c b/drivers/clk/clk-axi-clkgen.c
index 14d803e6af62..6ffc19e9d850 100644
--- a/drivers/clk/clk-axi-clkgen.c
+++ b/drivers/clk/clk-axi-clkgen.c
@@ -100,10 +100,17 @@  static uint32_t axi_clkgen_lookup_lock(unsigned int m)
 	return 0x1f1f00fa;
 }
 
+#ifdef ARCH_ZYNQMP
+static const unsigned int fpfd_min = 10000;
+static const unsigned int fpfd_max = 450000;
+static const unsigned int fvco_min = 800000;
+static const unsigned int fvco_max = 1600000;
+#else
 static const unsigned int fpfd_min = 10000;
 static const unsigned int fpfd_max = 300000;
 static const unsigned int fvco_min = 600000;
 static const unsigned int fvco_max = 1200000;
+#endif
 
 static void axi_clkgen_calc_params(unsigned long fin, unsigned long fout,
 	unsigned int *best_d, unsigned int *best_m, unsigned int *best_dout)