linux-kernel - Re: [PATCH 2/3] cpufreq: ti-cpufreq: add support for AM62L3 SoC

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Message-ID: <20260116100855.4w22hu22kzhcdaat@lcpd911>
Date: Fri, 16 Jan 2026 15:38:55 +0530
From: Dhruva Gole <d-gole@...com>
To: Krzysztof Kozlowski <krzk@...nel.org>
CC: "Rafael J. Wysocki" <rafael@...nel.org>, Viresh Kumar
	<viresh.kumar@...aro.org>, Nishanth Menon <nm@...com>, Vignesh Raghavendra
	<vigneshr@...com>, Tero Kristo <kristo@...nel.org>, Rob Herring
	<robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
	<conor+dt@...nel.org>, Kendall Willis <k-willis@...com>, Sebin Francis
	<sebin.francis@...com>, Bryan Brattlof <bb@...com>,
	<linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH 2/3] cpufreq: ti-cpufreq: add support for AM62L3 SoC

On Jan 16, 2026 at 10:16:55 +0100, Krzysztof Kozlowski wrote:
> On 16/01/2026 10:01, Dhruva Gole wrote:
> > Add CPUFreq support for the AM62L3 SoC with the appropriate
> > AM62L3 speed grade constants according to the datasheet [1].
> > 
> > This follows the same architecture-specific implementation pattern
> > as other TI SoCs in the AM6x family.
> > 
> > [1] https://www.ti.com/lit/pdf/SPRSPA1
> > 
> > Signed-off-by: Dhruva Gole <d-gole@...com>
> > ---
> >  drivers/cpufreq/ti-cpufreq.c | 32 ++++++++++++++++++++++++++++++++
> >  1 file changed, 32 insertions(+)
> > 
> > diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c
> > index 6ee76f5fe9c567b0b88797ddb51764a2a5606b16..8d8fdb068dcdc2caa0b656405f38a072c0700f71 100644
> > --- a/drivers/cpufreq/ti-cpufreq.c
> > +++ b/drivers/cpufreq/ti-cpufreq.c
> > @@ -48,6 +48,12 @@
> >  #define AM625_SUPPORT_S_MPU_OPP			BIT(1)
> >  #define AM625_SUPPORT_T_MPU_OPP			BIT(2)
> >  
> > +#define AM62L3_EFUSE_E_MPU_OPP			5
> > +#define AM62L3_EFUSE_O_MPU_OPP			15
> > +
> > +#define AM62L3_SUPPORT_E_MPU_OPP		BIT(0)
> > +#define AM62L3_SUPPORT_O_MPU_OPP		BIT(1)
> > +
> >  enum {
> >  	AM62A7_EFUSE_M_MPU_OPP =		13,
> >  	AM62A7_EFUSE_N_MPU_OPP,
> > @@ -213,6 +219,22 @@ static unsigned long am625_efuse_xlate(struct ti_cpufreq_data *opp_data,
> >  	return calculated_efuse;
> >  }
> >  
> > +static unsigned long am62l3_efuse_xlate(struct ti_cpufreq_data *opp_data,
> > +				       unsigned long efuse)
> > +{
> > +	unsigned long calculated_efuse = AM62L3_SUPPORT_E_MPU_OPP;
> > +
> > +	switch (efuse) {
> > +	case AM62L3_EFUSE_O_MPU_OPP:
> > +		calculated_efuse |= AM62L3_SUPPORT_O_MPU_OPP;
> > +		fallthrough;
> > +	case AM62L3_EFUSE_E_MPU_OPP:
> > +		calculated_efuse |= AM62L3_SUPPORT_E_MPU_OPP;
> > +	}
> > +
> > +	return calculated_efuse;
> > +}
> > +
> >  static struct ti_cpufreq_soc_data am3x_soc_data = {
> >  	.efuse_xlate = amx3_efuse_xlate,
> >  	.efuse_fallback = AM33XX_800M_ARM_MPU_MAX_FREQ,
> > @@ -315,6 +337,7 @@ static const struct soc_device_attribute k3_cpufreq_soc[] = {
> >  	{ .family = "AM62AX", },
> >  	{ .family = "AM62PX", },
> >  	{ .family = "AM62DX", },
> > +	{ .family = "AM62LX", },
> 
> So you just stuff at the end in every commit leading to unnecessary risk
> of conflicts.
> 
> >  	{ /* sentinel */ }
> >  };
> >  
> > @@ -327,6 +350,14 @@ static struct ti_cpufreq_soc_data am625_soc_data = {
> >  	.quirks = TI_QUIRK_SYSCON_IS_SINGLE_REG,
> >  };
> >  
> > +static struct ti_cpufreq_soc_data am62l3_soc_data = {
> > +	.efuse_xlate = am62l3_efuse_xlate,
> > +	.efuse_offset = 0x0,
> > +	.efuse_mask = 0x07c0,
> > +	.efuse_shift = 0x6,
> > +	.multi_regulator = false,
> > +};
> > +
> >  static struct ti_cpufreq_soc_data am62a7_soc_data = {
> >  	.efuse_xlate = am62a7_efuse_xlate,
> >  	.efuse_offset = 0x0,
> > @@ -463,6 +494,7 @@ static const struct of_device_id ti_cpufreq_of_match[]  __maybe_unused = {
> >  	{ .compatible = "ti,am625", .data = &am625_soc_data, },
> >  	{ .compatible = "ti,am62a7", .data = &am62a7_soc_data, },
> >  	{ .compatible = "ti,am62d2", .data = &am62a7_soc_data, },
> > +	{ .compatible = "ti,am62l3", .data = &am62l3_soc_data, },
> 
> Oh no, here it is correct. Random choices?

Seems like I remembered last moment, "Oh yeah I should probably sort this
alphabetically" and then forgot to follow it for the other instances :D

I'll sort it all out alphabetically and resend. Thanks for reviewing.

> 
> >  	{ .compatible = "ti,am62p5", .data = &am62p5_soc_data, },
> >  	/* legacy */
> >  	{ .compatible = "ti,omap3430", .data = &omap34xx_soc_data, },
> > 
> 
> 
> Best regards,
> Krzysztof

-- 
Best regards,
Dhruva Gole
Texas Instruments Incorporated