linux-kernel - Re: [PATCH 4/5] clk: qcom: camcc-sm8650: Add camera clock controller driver for SM8650

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Date: Wed, 7 Feb 2024 13:11:10 +0000
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Jagadeesh Kona <quic_jkona@...cinc.com>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
 Taniya Das <quic_tdas@...cinc.com>, linux-arm-msm@...r.kernel.org,
 linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, Imran Shaik <quic_imrashai@...cinc.com>,
 Ajit Pandey <quic_ajipan@...cinc.com>
Subject: Re: [PATCH 4/5] clk: qcom: camcc-sm8650: Add camera clock controller
 driver for SM8650

On 06/02/2024 11:31, Jagadeesh Kona wrote:
> Add support for the camera clock controller for camera clients to be
> able to request for camcc clocks on SM8650 platform.
> 
> Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>

> +static struct clk_rcg2 cam_cc_mclk1_clk_src = {
> +	.cmd_rcgr = 0x1501c,
> +	.mnd_width = 8,
> +	.hid_width = 5,
> +	.parent_map = cam_cc_parent_map_1,
> +	.freq_tbl = ftbl_cam_cc_mclk0_clk_src,
> +	.clkr.hw.init = &(const struct clk_init_data) {
> +		.name = "cam_cc_mclk1_clk_src",
> +		.parent_data = cam_cc_parent_data_1,
> +		.num_parents = ARRAY_SIZE(cam_cc_parent_data_1),
> +		.flags = CLK_SET_RATE_PARENT,
> +		.ops = &clk_rcg2_shared_ops,

Nice.

I compared this to WIP for x1e80100 which looks nearly register 
compatible. Use of the shared_ops indicates to me you've thought about 
which clocks should not be switched all the way off.

> +static struct platform_driver cam_cc_sm8650_driver = {
> +	.probe = cam_cc_sm8650_probe,
> +	.driver = {
> +		.name = "cam_cc-sm8650",

That said .. please fix the name here "cam_cc-sm8650". The title of your 
series is "camcc-sm8650" which IMO is a much more appropriate name.

The admixture of hyphen "-" and underscore "_" is some kind of 
tokenisation sin.

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>