Re: [PATCH] clk: qcom: camcc-sc8280xp: Remove always-on GDSC hard-coding

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On 17/07/2024 07:32, Satya Priya Kakitapalli (Temp) wrote:

On 7/15/2024 8:29 PM, Bryan O'Donoghue wrote:
We have both shared_ops for the Titan Top GDSC and a hard-coded always on
whack the register and forget about it in probe().

@static struct clk_branch camcc_gdsc_clk = {}

Only one representation of the Top GDSC is required. Use the CCF
representation not the hard-coded register write.

Fixes: ff93872a9c61 ("clk: qcom: camcc-sc8280xp: Add sc8280xp CAMCC")
Tested-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx> # Lenovo X13s
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
---
  drivers/clk/qcom/camcc-sc8280xp.c | 7 +------
  1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/clk/qcom/camcc-sc8280xp.c b/drivers/clk/qcom/camcc-sc8280xp.c
index 479964f91608..f99cd968459c 100644
--- a/drivers/clk/qcom/camcc-sc8280xp.c
+++ b/drivers/clk/qcom/camcc-sc8280xp.c
@@ -3031,19 +3031,14 @@ static int camcc_sc8280xp_probe(struct platform_device *pdev)
      clk_lucid_pll_configure(&camcc_pll6, regmap, &camcc_pll6_config);
      clk_lucid_pll_configure(&camcc_pll7, regmap, &camcc_pll7_config);
-    /* Keep some clocks always-on */
-    qcom_branch_set_clk_en(regmap, 0xc1e4); /* CAMCC_GDSC_CLK */


As I mentioned on [1], this change might break the GDSC functionality. Hence this shouldn't be removed.

How would it break ?

We park the clock to XO it never gets turned off this way.

---
bod




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