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Date: Tue, 29 Sep 2020 17:44:07 +0300
From: Alexandru Ardelean <alexandru.ardelean@...log.com>
To: <linux-clk@...r.kernel.org>, <linux-fpga@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
CC: <mturquette@...libre.com>, <sboyd@...nel.org>, <mdf@...nel.org>,
<ardeleanalex@...il.com>, Mathias Tausen <mta@...space.com>,
"Alexandru Ardelean" <alexandru.ardelean@...log.com>
Subject: [PATCH v4 5/7] clk: axi-clkgen: Respect ZYNQMP PFD/VCO frequency limits
From: Mathias Tausen <mta@...space.com>
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 <mta@...space.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
drivers/clk/clk-axi-clkgen.c | 9 +++++++++
1 file changed, 9 insertions(+)
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,
--
2.17.1
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