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From:   Robert Marko <robimarko@gmail.com>
To:     bjorn.andersson@linaro.org, agross@kernel.org,
        konrad.dybcio@somainline.org, mturquette@baylibre.com,
        sboyd@kernel.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, linux-arm-msm@vger.kernel.org,
        linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
Cc:     Robert Marko <robimarko@gmail.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Subject: [PATCH v2 2/7] clk: qcom: apss-ipq6018: fix apcs_alias0_clk_src
Date:   Mon, 11 Jul 2022 23:06:29 +0200
Message-Id: <20220711210634.3042092-2-robimarko@gmail.com>
In-Reply-To: <20220711210634.3042092-1-robimarko@gmail.com>
References: <20220711210634.3042092-1-robimarko@gmail.com>
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While working on IPQ8074 APSS driver it was discovered that IPQ6018 and
IPQ8074 use almost the same PLL and APSS clocks, however APSS driver is
currently broken.

More precisely apcs_alias0_clk_src is broken, it was added as regmap_mux
clock.
However after debugging why it was always stuck at 800Mhz, it was figured
out that its not regmap_mux compatible at all.
It is a simple mux but it uses RCG2 register layout and control bits, so
utilize the new clk_rcg2_mux_closest_ops to correctly drive it while not
having to provide a dummy frequency table.

While we are here, use ARRAY_SIZE for number of parents.

Tested on IPQ6018-CP01-C1 reference board and multiple IPQ8074 boards.

Fixes: 5e77b4ef1b19 ("clk: qcom: Add ipq6018 apss clock controller")
Signed-off-by: Robert Marko <robimarko@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/clk/qcom/apss-ipq6018.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/clk/qcom/apss-ipq6018.c b/drivers/clk/qcom/apss-ipq6018.c
index d78ff2f310bf..be952d417ded 100644
--- a/drivers/clk/qcom/apss-ipq6018.c
+++ b/drivers/clk/qcom/apss-ipq6018.c
@@ -16,7 +16,7 @@
 #include "clk-regmap.h"
 #include "clk-branch.h"
 #include "clk-alpha-pll.h"
-#include "clk-regmap-mux.h"
+#include "clk-rcg.h"
 
 enum {
 	P_XO,
@@ -33,16 +33,15 @@ static const struct parent_map parents_apcs_alias0_clk_src_map[] = {
 	{ P_APSS_PLL_EARLY, 5 },
 };
 
-static struct clk_regmap_mux apcs_alias0_clk_src = {
-	.reg = 0x0050,
-	.width = 3,
-	.shift = 7,
+static struct clk_rcg2 apcs_alias0_clk_src = {
+	.cmd_rcgr = 0x0050,
+	.hid_width = 5,
 	.parent_map = parents_apcs_alias0_clk_src_map,
 	.clkr.hw.init = &(struct clk_init_data){
 		.name = "apcs_alias0_clk_src",
 		.parent_data = parents_apcs_alias0_clk_src,
-		.num_parents = 2,
-		.ops = &clk_regmap_mux_closest_ops,
+		.num_parents = ARRAY_SIZE(parents_apcs_alias0_clk_src),
+		.ops = &clk_rcg2_mux_closest_ops,
 		.flags = CLK_SET_RATE_PARENT,
 	},
 };
-- 
2.36.1