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From b6655ca513b3f1b40417287ab7f706409455fe48 Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Thu, 15 Sep 2022 02:56:47 +0200
Subject: [PATCH 8/9] clk: qcom: krait-cc: handle secondary mux sourcing out of
PXO
The secondary mux can sourc out of PXO as the secondary MUX is attached
to QSB and to another mux that can source out of PXO or PLL8_VOTE.
Many device may run with uncorrect configuration with the mux sourcing
out of PXO instead of PLL8_VOTE.
To handle this case we add also PXO as required clocks and we check if
the frequency is currently set to PXO and force a correct rate if it's
the case.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
drivers/clk/qcom/krait-cc.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
--- a/drivers/clk/qcom/krait-cc.c
+++ b/drivers/clk/qcom/krait-cc.c
@@ -317,7 +317,7 @@ static int krait_cc_probe(struct platfor
{
struct device *dev = &pdev->dev;
const struct of_device_id *id;
- unsigned long cur_rate, aux_rate, qsb_rate;
+ unsigned long cur_rate, aux_rate, qsb_rate, pxo_rate;
int cpu;
struct clk *clk;
struct clk **clks;
@@ -327,6 +327,15 @@ static int krait_cc_probe(struct platfor
if (!id)
return -ENODEV;
+ clk = clk_get(dev, "pxo");
+ if (IS_ERR(clk))
+ clk = __clk_lookup("pxo_board");
+
+ if (IS_ERR_OR_NULL(clk))
+ return clk == NULL ? -ENODEV : PTR_ERR(clk);
+
+ pxo_rate = clk_get_rate(clk);
+
/*
* Per Documentation qsb should be provided from DTS.
* To address old implementation, register the fixed clock anyway.
@@ -394,6 +403,10 @@ static int krait_cc_probe(struct platfor
dev_info(dev, "L2 @ QSB rate. Forcing new rate.\n");
cur_rate = aux_rate;
}
+ if (cur_rate == pxo_rate) {
+ dev_info(dev, "L2 @ PXO rate. Forcing new rate.\n");
+ cur_rate = aux_rate;
+ }
clk_set_rate(l2_pri_mux_clk, aux_rate);
clk_set_rate(l2_pri_mux_clk, 2);
clk_set_rate(l2_pri_mux_clk, cur_rate);
@@ -405,6 +418,10 @@ static int krait_cc_probe(struct platfor
dev_info(dev, "CPU%d @ QSB rate. Forcing new rate.\n", cpu);
cur_rate = aux_rate;
}
+ if (cur_rate ==pxo_rate) {
+ dev_info(dev, "CPU%d @ PXO rate. Forcing new rate.\n", cpu);
+ cur_rate = aux_rate;
+ }
clk_set_rate(clk, aux_rate);
clk_set_rate(clk, 2);
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