linux-kernel - Re: [PATCH 08/10] clk: qcom: add the SM8650 Display Clock Controller driver

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Date:   Thu, 26 Oct 2023 14:27:22 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Stephen Boyd <sboyd@...nel.org>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Taniya Das <quic_tdas@...cinc.com>
Cc:     linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/10] clk: qcom: add the SM8650 Display Clock Controller
 driver

On 25/10/2023 23:45, Stephen Boyd wrote:
> Quoting Neil Armstrong (2023-10-25 00:32:45)
>> diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
>> index c04b6526f4f3..5bf25e8d033c 100644
>> --- a/drivers/clk/qcom/Kconfig
>> +++ b/drivers/clk/qcom/Kconfig
>> @@ -842,6 +842,15 @@ config SM_DISPCC_8550
>>            Say Y if you want to support display devices and functionality such as
>>            splash screen.
>>   
>> +config SM_DISPCC_8650
>> +       tristate "SM8650 Display Clock Controller"
>> +       depends on SM_GCC_8650
> 
> selects?
> 
> We use selects instead of depends so that the driver can be built-in or
> modular regardless of parent clks that provide clks to this device.
> Orphan clk handling resolves issues with the driver registering clks
> before parents. And with fw_devlink the driver isn't even attempted to
> probe before the GCC driver is probed so there's no build dependency
> between these drivers.

All current DISPCC entries uses depends, but CAM_CC doesn't,
I'll switch to select and re-sync Kconfig for all 8650 entries.

> 
>> +       help
>> +         Support for the display clock controller on Qualcomm Technologies, Inc
>> +         SM8650 devices.
>> +         Say Y if you want to support display devices and functionality such as
>> +         splash screen.
>> +
>>   config SM_GCC_4450
>>          tristate "SM4450 Global Clock Controller"
>>          depends on ARM64 || COMPILE_TEST
>> diff --git a/drivers/clk/qcom/dispcc-sm8650.c b/drivers/clk/qcom/dispcc-sm8650.c
>> new file mode 100644
>> index 000000000000..7cb91306e895
>> --- /dev/null
>> +++ b/drivers/clk/qcom/dispcc-sm8650.c
>> @@ -0,0 +1,1806 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * Copyright (c) 2021, The Linux Foundation. All rights reserved.
>> + * Copyright (c) 2023, Linaro Ltd.
>> + */
>> +
>> +#include <linux/clk.h>
> 
> Is this include used?
> 
>> +#include <linux/clk-provider.h>
>> +#include <linux/err.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/of_device.h>
> 
> Is this mod_devicetable.h?
> 
>> +#include <linux/of.h>
> 
> Is this include used?
> 
>> +#include <linux/regmap.h>
>> +#include <linux/pm_runtime.h>
>> +
>> +#include <dt-bindings/clock/qcom,sm8650-dispcc.h>
>> +
>> +#include "common.h"
>> +#include "clk-alpha-pll.h"
>> +#include "clk-branch.h"
>> +#include "clk-pll.h"
>> +#include "clk-rcg.h"
>> +#include "clk-regmap.h"
>> +#include "clk-regmap-divider.h"
>> +#include "clk-regmap-mux.h"
> 
> Is this include used?
> 
>> +#include "reset.h"
>> +#include "gdsc.h"
>> +

Did a include cleanup aswell on all drivers.

Thanks,
Neil