linux-kernel - Re: [PATCH V4 2/4] clk: qcom: branch: Add mem ops support for branch2 clocks

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Message-ID: <90885d90-2e25-404b-b3a3-13d134801146@linaro.org>
Date:   Wed, 22 Nov 2023 21:09:54 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Imran Shaik <quic_imrashai@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     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, netdev@...r.kernel.org,
        Ajit Pandey <quic_ajipan@...cinc.com>,
        Jagadeesh Kona <quic_jkona@...cinc.com>
Subject: Re: [PATCH V4 2/4] clk: qcom: branch: Add mem ops support for branch2
 clocks



On 11/17/23 10:55, Imran Shaik wrote:
> From: Taniya Das <quic_tdas@...cinc.com>
> 
> Add the support for mem ops implementation to handle the sequence of
> enable/disable of the memories in ethernet PHY, prior to enable/disable
> of the respective clocks, which helps retain the respecive block's
> register contents.
> 
> Signed-off-by: Taniya Das <quic_tdas@...cinc.com>
> Signed-off-by: Imran Shaik <quic_imrashai@...cinc.com>
> ---
>   drivers/clk/qcom/clk-branch.c | 39 +++++++++++++++++++++++++++++++++++
>   drivers/clk/qcom/clk-branch.h | 21 +++++++++++++++++++
>   2 files changed, 60 insertions(+)
> 
> diff --git a/drivers/clk/qcom/clk-branch.c b/drivers/clk/qcom/clk-branch.c
> index fc4735f74f0f..61bdd2147bed 100644
> --- a/drivers/clk/qcom/clk-branch.c
> +++ b/drivers/clk/qcom/clk-branch.c
> @@ -1,6 +1,7 @@
>   // SPDX-License-Identifier: GPL-2.0
>   /*
>    * Copyright (c) 2013, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserved.
>    */
>   
>   #include <linux/kernel.h>
> @@ -134,6 +135,44 @@ static void clk_branch2_disable(struct clk_hw *hw)
>   	clk_branch_toggle(hw, false, clk_branch2_check_halt);
>   }
>   
> +static int clk_branch2_mem_enable(struct clk_hw *hw)
> +{
> +	struct clk_mem_branch *mem_br = to_clk_mem_branch(hw);
> +	struct clk_branch branch = mem_br->branch;
> +	const char *name = clk_hw_get_name(&branch.clkr.hw);
Bit of a microoptimization, but adding this implicitly in the WARN
would only execute clk_hw_get_name when necessary

> +	u32 val;
> +	int ret;
> +
> +	regmap_update_bits(branch.clkr.regmap, mem_br->mem_enable_reg,
> +			mem_br->mem_enable_ack_mask, mem_br->mem_enable_ack_mask);
It's quite a nit from me, but it would be nice to have the next line aligned
with the opening brace (with a tab size of 8)

Konrad