linux-kernel - [PATCH v3 2/4] clk: clk-axiclkgen: add ZynqMP PFD and VCO limits

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Date:   Mon, 1 Feb 2021 17:12:43 +0200
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <linux-clk@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <mturquette@...libre.com>, <sboyd@...nel.org>,
        <robh+dt@...nel.org>, <lars@...afoo.de>,
        <linux-fpga@...r.kernel.org>, <mdf@...nel.org>,
        <ardeleanalex@...il.com>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        Dragos Bogdan <dragos.bogdan@...log.com>,
        Mathias Tausen <mta@...space.com>
Subject: [PATCH v3 2/4] clk: clk-axiclkgen: add ZynqMP PFD and VCO limits

For ZynqMP (Ultrascale) the PFD and VCO limits are different. In order to
support these, this change adds a compatible string (i.e.
'adi,zynqmp-axi-clkgen-2.00.a')  which will take into account for these
limits and apply them.

Signed-off-by: Dragos Bogdan <dragos.bogdan@...log.com>
Signed-off-by: Mathias Tausen <mta@...space.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
 drivers/clk/clk-axi-clkgen.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/clk/clk-axi-clkgen.c b/drivers/clk/clk-axi-clkgen.c
index ad86e031ba3e..9d1b0fc56c73 100644
--- a/drivers/clk/clk-axi-clkgen.c
+++ b/drivers/clk/clk-axi-clkgen.c
@@ -108,6 +108,13 @@ static uint32_t axi_clkgen_lookup_lock(unsigned int m)
 	return 0x1f1f00fa;
 }
 
+static const struct axi_clkgen_limits axi_clkgen_zynqmp_default_limits = {
+	.fpfd_min = 10000,
+	.fpfd_max = 450000,
+	.fvco_min = 800000,
+	.fvco_max = 1600000,
+};
+
 static const struct axi_clkgen_limits axi_clkgen_zynq_default_limits = {
 	.fpfd_min = 10000,
 	.fpfd_max = 300000,
@@ -560,6 +567,10 @@ static int axi_clkgen_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id axi_clkgen_ids[] = {
+	{
+		.compatible = "adi,zynqmp-axi-clkgen-2.00.a",
+		.data = &axi_clkgen_zynqmp_default_limits,
+	},
 	{
 		.compatible = "adi,axi-clkgen-2.00.a",
 		.data = &axi_clkgen_zynq_default_limits,
-- 
2.17.1