linux-kernel - Re: [PATCH V2 2/2] clk: qcom: Add SM6125 (TRINKET) GCC driver

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Date:   Mon, 24 May 2021 22:12:07 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Martin Botka <martin.botka@...ainline.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        konrad.dybcio@...ainline.org,
        angelogioacchino.delregno@...ainline.org,
        marijn.suijten@...ainline.org, Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 2/2] clk: qcom: Add SM6125 (TRINKET) GCC driver

On Sun 23 May 16:10 CDT 2021, Martin Botka wrote:

> From: Konrad Dybcio <konrad.dybcio@...ainline.org>
> 
> Add the clocks supported in global clock controller, which clock the
> peripherals like BLSPs, SDCC, USB, MDSS etc. Register all the clocks
> to the clock framework for the clients to be able to request for them.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
> Signed-off-by: Martin Botka <martin.botka@...ainline.org>

This looks quite good to me, just two small things below.

> diff --git a/drivers/clk/qcom/gcc-sm6125.c b/drivers/clk/qcom/gcc-sm6125.c
[..]
> +static struct clk_alpha_pll gpll0_out_early = {
> +	.offset = 0x0,
> +	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
> +	.clkr = {
> +		.enable_reg = 0x79000,
> +		.enable_mask = BIT(0),
> +		.hw.init = &(struct clk_init_data){
> +			.name = "gpll0_out_early",
> +			.parent_data = &(const struct clk_parent_data){
> +				.fw_name = "bi_tcxo",
> +				.name = "bi_tcxo",

For new drivers we don't need to rely on global name lookup, so just
keep fw_name for the external clocks.

> +			},
> +			.num_parents = 1,
> +			.ops = &clk_alpha_pll_ops,
> +		},
> +	},
> +};
> +
> +static struct clk_fixed_factor gpll0_out_aux2 = {
> +	.mult = 1,
> +	.div = 2,
> +	.hw.init = &(struct clk_init_data){
> +		.name = "gpll0_out_aux2",
> +		.parent_data = &(const struct clk_parent_data){
> +			.hw = &gpll0_out_early.clkr.hw,
> +		},
> +		.num_parents = 1,
> +		.ops = &clk_fixed_factor_ops,
> +	},
> +};
> +
> +static struct clk_fixed_factor gpll0_out_main = {
> +	.mult = 1,
> +	.div = 2,
> +	.hw.init = &(struct clk_init_data){
> +		.name = "gpll0_out_main",
> +		.parent_data = &(const struct clk_parent_data){

Please use parent_hws instead when referencing a single hw in the same
driver.

> +			.hw = &gpll0_out_early.clkr.hw,
> +		},
> +		.num_parents = 1,
> +		.ops = &clk_fixed_factor_ops,
> +	},
> +};
> +

Regards,
Bjorn