linux-kernel - Re: [PATCH v2 3/4] clk: qcom: lpasscc-sc7280: Remove qdsp6ss clock control

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Date:   Mon, 2 Jan 2023 17:04:51 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>,
        swboyd@...omium.org, agross@...nel.org, andersson@...nel.org,
        robh+dt@...nel.org, broonie@...nel.org, quic_plai@...cinc.com,
        krzysztof.kozlowski+dt@...aro.org, konrad.dybcio@...ainline.org,
        mturquette@...libre.com, sboyd@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_rohkumar@...cinc.com
Subject: Re: [PATCH v2 3/4] clk: qcom: lpasscc-sc7280: Remove qdsp6ss clock
 control

On 30/12/2022 14:43, Srinivasa Rao Mandadapu wrote:
> The qdsp6ss memory region is being shared by ADSP remoteproc device and
> lpasscc clock device, hence causing memory conflict.
> As the qdsp6ss clocks are being enabled in remoteproc driver,
> remove clock controlling in the clock driver.
> 
> Fixes: 4ab43d171181 ("clk: qcom: Add lpass clock controller driver for SC7280")
> 
> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
> Tested-by: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
> ---
>  drivers/clk/qcom/lpasscc-sc7280.c | 63 +--------------------------------------
>  1 file changed, 1 insertion(+), 62 deletions(-)
> 
> diff --git a/drivers/clk/qcom/lpasscc-sc7280.c b/drivers/clk/qcom/lpasscc-sc7280.c
> index 5c1e17b..87e1c21 100644
> --- a/drivers/clk/qcom/lpasscc-sc7280.c
> +++ b/drivers/clk/qcom/lpasscc-sc7280.c
> @@ -30,48 +30,6 @@ static struct clk_branch lpass_top_cc_lpi_q6_axim_hs_clk = {
>  	},
>  };
>  
> -static struct clk_branch lpass_qdsp6ss_core_clk = {
> -	.halt_reg = 0x20,
> -	/* CLK_OFF would not toggle until LPASS is out of reset */
> -	.halt_check = BRANCH_HALT_SKIP,
> -	.clkr = {
> -		.enable_reg = 0x20,
> -		.enable_mask = BIT(0),
> -		.hw.init = &(struct clk_init_data){
> -			.name = "lpass_qdsp6ss_core_clk",
> -			.ops = &clk_branch2_ops,
> -		},
> -	},
> -};
> -
> -static struct clk_branch lpass_qdsp6ss_xo_clk = {
> -	.halt_reg = 0x38,
> -	/* CLK_OFF would not toggle until LPASS is out of reset */
> -	.halt_check = BRANCH_HALT_SKIP,
> -	.clkr = {
> -		.enable_reg = 0x38,
> -		.enable_mask = BIT(0),
> -		.hw.init = &(struct clk_init_data){
> -			.name = "lpass_qdsp6ss_xo_clk",
> -			.ops = &clk_branch2_ops,
> -		},
> -	},
> -};
> -
> -static struct clk_branch lpass_qdsp6ss_sleep_clk = {
> -	.halt_reg = 0x3c,
> -	/* CLK_OFF would not toggle until LPASS is out of reset */
> -	.halt_check = BRANCH_HALT_SKIP,
> -	.clkr = {
> -		.enable_reg = 0x3c,
> -		.enable_mask = BIT(0),
> -		.hw.init = &(struct clk_init_data){
> -			.name = "lpass_qdsp6ss_sleep_clk",
> -			.ops = &clk_branch2_ops,
> -		},
> -	},
> -};
> -
>  static struct regmap_config lpass_regmap_config = {
>  	.reg_bits	= 32,
>  	.reg_stride	= 4,
> @@ -90,18 +48,6 @@ static const struct qcom_cc_desc lpass_cc_top_sc7280_desc = {
>  	.num_clks = ARRAY_SIZE(lpass_cc_top_sc7280_clocks),
>  };
>  
> -static struct clk_regmap *lpass_qdsp6ss_sc7280_clocks[] = {
> -	[LPASS_QDSP6SS_XO_CLK] = &lpass_qdsp6ss_xo_clk.clkr,
> -	[LPASS_QDSP6SS_SLEEP_CLK] = &lpass_qdsp6ss_sleep_clk.clkr,
> -	[LPASS_QDSP6SS_CORE_CLK] = &lpass_qdsp6ss_core_clk.clkr,
> -};
> -
> -static const struct qcom_cc_desc lpass_qdsp6ss_sc7280_desc = {
> -	.config = &lpass_regmap_config,
> -	.clks = lpass_qdsp6ss_sc7280_clocks,
> -	.num_clks = ARRAY_SIZE(lpass_qdsp6ss_sc7280_clocks),
> -};
> -
>  static int lpass_cc_sc7280_probe(struct platform_device *pdev)
>  {
>  	const struct qcom_cc_desc *desc;
> @@ -118,17 +64,10 @@ static int lpass_cc_sc7280_probe(struct platform_device *pdev)
>  		goto destroy_pm_clk;
>  	}
>  
> -	lpass_regmap_config.name = "qdsp6ss";
> -	desc = &lpass_qdsp6ss_sc7280_desc;
> -
> -	ret = qcom_cc_probe_by_index(pdev, 0, desc);
> -	if (ret)
> -		goto destroy_pm_clk;
> -
>  	lpass_regmap_config.name = "top_cc";
>  	desc = &lpass_cc_top_sc7280_desc;
>  
> -	ret = qcom_cc_probe_by_index(pdev, 1, desc);
> +	ret = qcom_cc_probe_by_index(pdev, 0, desc);

ABI break but actually does not work with upstream either. DTS at this
point has here on index "0" different address and you probe now top_cc
on it.

Best regards,
Krzysztof