linux-kernel - Re: [PATCH v3 03/12] soc: qcom: geni-se: Introduce helper API for resource initialization

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <eaed2a51-2efe-44d7-9186-115dfd185a62@oss.qualcomm.com>
Date: Fri, 30 Jan 2026 22:30:04 +0530
From: Praveen Talari <praveen.talari@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Andi Shyti <andi.shyti@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Mukesh Kumar Savaliya <mukesh.savaliya@....qualcomm.com>,
        Viken Dadhaniya <viken.dadhaniya@....qualcomm.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, bryan.odonoghue@...aro.org,
        dmitry.baryshkov@....qualcomm.com, bjorn.andersson@....qualcomm.com
Cc: prasad.sodagudi@....qualcomm.com, quic_vtanuku@...cinc.com,
        aniket.randive@....qualcomm.com, chandana.chiluveru@....qualcomm.com
Subject: Re: [PATCH v3 03/12] soc: qcom: geni-se: Introduce helper API for
 resource initialization

Hi Konrad

On 1/30/2026 5:40 PM, Konrad Dybcio wrote:
> On 1/12/26 11:47 AM, Praveen Talari wrote:
>> The GENI Serial Engine drivers (I2C, SPI, and SERIAL) currently duplicate
>> code for initializing shared resources such as clocks and interconnect
>> paths.
>>
>> Introduce a new helper API, geni_se_resources_init(), to centralize this
>> initialization logic, improving modularity and simplifying the probe
>> function.
>>
>> Signed-off-by: Praveen Talari <praveen.talari@....qualcomm.com>
>> ---
>> v1 -> v2:
>>  From kernel test robot
>> - Updated proper return value for devm_pm_opp_set_clkname()
>> ---
>>   drivers/soc/qcom/qcom-geni-se.c  | 47 ++++++++++++++++++++++++++++++++
>>   include/linux/soc/qcom/geni-se.h |  6 ++++
>>   2 files changed, 53 insertions(+)
>>
>> diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c
>> index b0542f836453..75e722cd1a94 100644
>> --- a/drivers/soc/qcom/qcom-geni-se.c
>> +++ b/drivers/soc/qcom/qcom-geni-se.c
>> @@ -19,6 +19,7 @@
>>   #include <linux/of_platform.h>
>>   #include <linux/pinctrl/consumer.h>
>>   #include <linux/platform_device.h>
>> +#include <linux/pm_opp.h>
>>   #include <linux/soc/qcom/geni-se.h>
>>   
>>   /**
>> @@ -1012,6 +1013,52 @@ int geni_icc_disable(struct geni_se *se)
>>   }
>>   EXPORT_SYMBOL_GPL(geni_icc_disable);
>>   
>> +/**
>> + * geni_se_resources_init() - Initialize resources for a GENI SE device.
>> + * @se: Pointer to the geni_se structure representing the GENI SE device.
>> + *
>> + * This function initializes various resources required by the GENI Serial Engine
>> + * (SE) device, including clock resources (core and SE clocks), interconnect
>> + * paths for communication.
>> + * It retrieves optional and mandatory clock resources, adds an OF-based
>> + * operating performance point (OPP) table, and sets up interconnect paths
>> + * with default bandwidths. The function also sets a flag (`has_opp`) to
>> + * indicate whether OPP support is available for the device.
>> + *
>> + * Return: 0 on success, or a negative errno on failure.
>> + */
>> +int geni_se_resources_init(struct geni_se *se)
>> +{
>> +	int ret;
>> +
>> +	se->core_clk = devm_clk_get_optional(se->dev, "core");
>> +	if (IS_ERR(se->core_clk))
>> +		return dev_err_probe(se->dev, PTR_ERR(se->core_clk),
>> +				     "Failed to get optional core clk\n");
>> +
>> +	se->clk = devm_clk_get(se->dev, "se");
>> +	if (IS_ERR(se->clk) && !has_acpi_companion(se->dev))
>> +		return dev_err_probe(se->dev, PTR_ERR(se->clk),
>> +				     "Failed to get SE clk\n");
>> +
>> +	ret = devm_pm_opp_set_clkname(se->dev, "se");
>> +	if (ret)
>> +		return ret;
>> +
>> +	ret = devm_pm_opp_of_add_table(se->dev);
>> +	if (ret && ret != -ENODEV)
>> +		return dev_err_probe(se->dev, ret, "Failed to add OPP table\n");
>> +
>> +	se->has_opp = (ret == 0);
>> +
>> +	ret = geni_icc_get(se, "qup-memory");
> 
> The second argument is a NOP after patch 1.. originally I think I had a
> cross-subsys patch to get rid of that, neither solution is exactly pretty..

I will drop the second argument once these changes are ported across 
UART and SPI as well.

Thanks,
Praveen Talari

> 
> But otherwise, this looks good
> 
> Konrad