linux-kernel - [PATCH] clk: qcom: gcc-sc7180: Use floor ops for the correct sdcc1 clk

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Date:   Wed, 24 Feb 2021 09:50:25 -0800
From:   Douglas Anderson <dianders@...omium.org>
To:     sboyd@...nel.org
Cc:     vbadigan@...eaurora.org, tdas@...eaurora.org,
        Douglas Anderson <dianders@...omium.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] clk: qcom: gcc-sc7180: Use floor ops for the correct sdcc1 clk

While picking commit a8cd989e1a57 ("mmc: sdhci-msm: Warn about
overclocking SD/MMC") back to my tree I was surprised that it was
reporting warnings.  I thought I fixed those!  Looking closer at the
fix, I see that I totally bungled it (or at least I halfway bungled
it).  The SD card clock got fixed (and that was the one I was really
focused on fixing), but I totally adjusted the wrong clock for eMMC.
Sigh.  Let's fix my dumb mistake.

Now both SD and eMMC have floor for the "apps" clock.

This doesn't matter a lot for the final clock rate for HS400 eMMC but
could matter if someone happens to put some slower eMMC on a sc7180.
We also transition through some of these lower rates sometimes and
having them wrong could cause problems during these transitions.
These were the messages I was seeing at boot:
  mmc1: Card appears overclocked; req 52000000 Hz, actual 100000000 Hz
  mmc1: Card appears overclocked; req 52000000 Hz, actual 100000000 Hz
  mmc1: Card appears overclocked; req 104000000 Hz, actual 192000000 Hz

Fixes: 6d37a8d19283 ("clk: qcom: gcc-sc7180: Use floor ops for sdcc clks")
Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

 drivers/clk/qcom/gcc-sc7180.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/qcom/gcc-sc7180.c b/drivers/clk/qcom/gcc-sc7180.c
index c5c2e93bda8e..5cacd20a31b3 100644
--- a/drivers/clk/qcom/gcc-sc7180.c
+++ b/drivers/clk/qcom/gcc-sc7180.c
@@ -620,7 +620,7 @@ static struct clk_rcg2 gcc_sdcc1_apps_clk_src = {
 		.name = "gcc_sdcc1_apps_clk_src",
 		.parent_data = gcc_parent_data_1,
 		.num_parents = 5,
-		.ops = &clk_rcg2_ops,
+		.ops = &clk_rcg2_floor_ops,
 	},
 };

@@ -642,7 +642,7 @@ static struct clk_rcg2 gcc_sdcc1_ice_core_clk_src = {
 		.name = "gcc_sdcc1_ice_core_clk_src",
 		.parent_data = gcc_parent_data_0,
 		.num_parents = 4,
-		.ops = &clk_rcg2_floor_ops,
+		.ops = &clk_rcg2_ops,
 	},
 };

-- 
2.30.0.617.g56c4b15f3c-goog