linux-kernel - Re: [PATCH v1 5/9] serial: qcom-geni: move resource initialization to separate functions

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Message-ID: <e48d81c5-65f1-4ef9-9acb-323bf287767d@kernel.org>
Date: Mon, 14 Apr 2025 09:58:21 +0200
From: Jiri Slaby <jirislaby@...nel.org>
To: Praveen Talari <quic_ptalari@...cinc.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>, Viresh Kumar <vireshk@...nel.org>,
 Nishanth Menon <nm@...com>, Stephen Boyd <sboyd@...nel.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>, linux-arm-msm@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
 devicetree@...r.kernel.org, linux-pm@...r.kernel.org
Cc: psodagud@...cinc.com, djaggi@...cinc.com, quic_msavaliy@...cinc.com,
 quic_vtanuku@...cinc.com, quic_arandive@...cinc.com,
 quic_mnaresh@...cinc.com, quic_shazhuss@...cinc.com
Subject: Re: [PATCH v1 5/9] serial: qcom-geni: move resource initialization to
 separate functions

On 10. 04. 25, 19:40, Praveen Talari wrote:
> Enhances code readability and future modifications within the new API.
> 
> Move the code that handles the actual initialization of resources
> like clock and ICC paths to a separate function, making the
> probe function cleaner.

The $SUBJ is misleading. There is only one function here.

> 
> Signed-off-by: Praveen Talari <quic_ptalari@...cinc.com>
> ---
>   drivers/tty/serial/qcom_geni_serial.c | 65 ++++++++++++++++-----------
>   1 file changed, 39 insertions(+), 26 deletions(-)
> 
> diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
> index a80ce7aaf309..889ce8961e0a 100644
> --- a/drivers/tty/serial/qcom_geni_serial.c
> +++ b/drivers/tty/serial/qcom_geni_serial.c
> @@ -1572,6 +1572,42 @@ static struct uart_driver qcom_geni_uart_driver = {
>   	.nr =  GENI_UART_PORTS,
>   };
>   
> +static int geni_serial_resource_init(struct qcom_geni_serial_port *port)
> +{
> +	int ret;
> +
> +	port->se.clk = devm_clk_get(port->se.dev, "se");
> +	if (IS_ERR(port->se.clk)) {
> +		ret = PTR_ERR(port->se.clk);

You can return this directly, without assigning it to ret, right?

> +		dev_err(port->se.dev, "Err getting SE Core clk %d\n", ret);
> +		return ret;
> +	}
> +
> +	ret = geni_icc_get(&port->se, NULL);
> +	if (ret)
> +		return ret;
> +
> +	port->se.icc_paths[GENI_TO_CORE].avg_bw = GENI_DEFAULT_BW;
> +	port->se.icc_paths[CPU_TO_GENI].avg_bw = GENI_DEFAULT_BW;
> +
> +	/* Set BW for register access */
> +	ret = geni_icc_set_bw(&port->se);
> +	if (ret)
> +		return ret;
> +
> +	ret = devm_pm_opp_set_clkname(port->se.dev, "se");
> +	if (ret)
> +		return ret;
> +
> +	/* OPP table is optional */
> +	ret = devm_pm_opp_of_add_table(port->se.dev);
> +	if (ret && ret != -ENODEV) {
> +		dev_err(port->se.dev, "invalid OPP table in device tree\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}

A \n missing here.

>   static void qcom_geni_serial_pm(struct uart_port *uport,
>   		unsigned int new_state, unsigned int old_state)
>   {

thanks,
-- 
js
suse labs