linux-kernel - Re: [PATCH v10 4/4] input: pm8xxx-vibrator: add new SPMI vibrator support

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Date: Mon, 15 Apr 2024 21:52:32 +0200
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: quic_fenglinw@...cinc.com, kernel@...cinc.com,
 Andy Gross <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 Dmitry Torokhov <dmitry.torokhov@...il.com>, Rob Herring
 <robh+dt@...nel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>,
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, linux-input@...r.kernel.org,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v10 4/4] input: pm8xxx-vibrator: add new SPMI vibrator
 support



On 4/12/24 14:36, Fenglin Wu via B4 Relay wrote:
> From: Fenglin Wu <quic_fenglinw@...cinc.com>
> 
> Add support for a new SPMI vibrator module which is very similar
> to the vibrator module inside PM8916 but has a finer drive voltage
> step and different output voltage range, its drive level control
> is expanded across 2 registers. The vibrator module can be found
> in following Qualcomm PMICs: PMI632, PM7250B, PM7325B, PM7550BA.
> 
> Signed-off-by: Fenglin Wu <quic_fenglinw@...cinc.com>
> ---

[...]


>   
> +	if (regs->drv2_mask) {
> +		if (on)
> +			val = (vib->level << regs->drv2_shift) & regs->drv2_mask;

The point of regmap_foo_bits is that you no longer need to mask the
value here.

> +		else
> +			val = 0;
> +

You can also save some LoC without compromising on legibility:

if (regs->drv2_mask) {
	val = vib->level << regs->drv2_shift;

	rc = regmap_write_bits(vib->regmap, vib->drv2_addr,
			       regs->drv2_mask, on ? val : 0)
	if (rc < 0)
		return rc;
}

Konrad