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SubjectRe: [PATCH 2/2] clk: qcom: Add ipq6018 apss clock controller
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Hi Stephen,

Thanks for the review.

On 3/10/2020 1:54 AM, Stephen Boyd wrote:
> Quoting Sivaprakash Murugesan (2020-02-27 01:55:18)
>> diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
>> index 15cdcdc..37e4ce2 100644
>> --- a/drivers/clk/qcom/Kconfig
>> +++ b/drivers/clk/qcom/Kconfig
>> @@ -89,6 +89,14 @@ config APQ_MMCC_8084
>> Say Y if you want to support multimedia devices such as display,
>> graphics, video encode/decode, camera, etc.
>>
>> +config IPQ_APSS_6018
>> + tristate "IPQ6018 APSS Clock Controller"
>> + select IPQ_GCC_6018
>> + help
>> + Support for APSS clock controller on ipq6018 devices. The
>> + APSS clock controller supports frequencies higher than 800Mhz.
> supports CPU frequencies? It's not clear what APSS is to a lot of people
> out there.
ok. Will try to elaborate.
>
>> + Say Y if you want to support higher frequencies on ipq6018 devices.
> support CPU frequency scaling on ipq6018?
ok.
>
>> +
>> config IPQ_GCC_4019
>> tristate "IPQ4019 Global Clock Controller"
>> help
>> diff --git a/drivers/clk/qcom/apss-ipq6018.c b/drivers/clk/qcom/apss-ipq6018.c
>> new file mode 100644
>> index 0000000..04b8962
>> --- /dev/null
>> +++ b/drivers/clk/qcom/apss-ipq6018.c
>> @@ -0,0 +1,210 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (c) 2018, The Linux Foundation. All rights reserved.
>> + */
>> +
>> +#include <linux/kernel.h>
>> +#include <linux/err.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_device.h>
> Are these two includes needed at all?
No they're not. will remove it.
>> +#include <linux/clk-provider.h>
>> +#include <linux/regmap.h>
>> +
>> +#include <linux/reset-controller.h>
>> +#include <dt-bindings/clock/qcom,apss-ipq6018.h>
>> +
>> +#include "common.h"
>> +#include "clk-regmap.h"
>> +#include "clk-pll.h"
>> +#include "clk-rcg.h"
>> +#include "clk-branch.h"
>> +#include "clk-alpha-pll.h"
>> +#include "clk-regmap-divider.h"
>> +#include "clk-regmap-mux.h"
>> +#include "reset.h"
>> +
>> +#define F(f, s, h, m, n) { (f), (s), (2 * (h) - 1), (m), (n) }
> This can be removed. It's common in clk-rcg.h now
ok.
>
>> +
>> +static struct clk_branch apcs_alias0_core_clk = {
>> + .halt_reg = 0x004c,
>> + .clkr = {
>> + .enable_reg = 0x004c,
>> + .enable_mask = BIT(0),
>> + .hw.init = &(struct clk_init_data){
>> + .name = "apcs_alias0_core_clk",
>> + .parent_hws = (const struct clk_hw *[]){
>> + &apcs_alias0_clk_src.clkr.hw },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
> Please add a comment about why CLK_IS_CRITICAL is here. Presumably in
> the case that a cpufreq driver doesn't probe and claim this clk?
ok.
>> + .ops = &clk_branch2_ops,
>> + },
>> + },
>> +};
>> +
>> +
> [...]
>> +
>> +static int __init apss_ipq6018_init(void)
>> +{
>> + return platform_driver_register(&apss_ipq6018_driver);
>> +}
>> +core_initcall(apss_ipq6018_init);
>> +
>> +static void __exit apss_ipq6018_exit(void)
>> +{
>> + platform_driver_unregister(&apss_ipq6018_driver);
>> +}
>> +module_exit(apss_ipq6018_exit);
> Any reason this can't just be module_platform_driver()?
yeah it can be. will fix it.

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