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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Santhosh Kumar K <s-k6@ti.com>
Cc: <broonie@kernel.org>,  <robh@kernel.org>,  <krzk+dt@kernel.org>,
	<conor+dt@kernel.org>,  <richard@nod.at>,  <vigneshr@ti.com>,
	<pratyush@kernel.org>,  <mwalle@kernel.org>,
	<takahiro.kuwano@infineon.com>,  <linux-spi@vger.kernel.org>,
	<devicetree@vger.kernel.org>,  <linux-kernel@vger.kernel.org>,
	<linux-mtd@lists.infradead.org>,  <praneeth@ti.com>,
	 <u-kumar1@ti.com>, <a-dutta@ti.com>
Subject: Re: [PATCH v3 04/13] spi: spi-mem: add spi_mem_apply_base_freq_cap()
Date: Thu, 28 May 2026 10:43:39 +0200	[thread overview]
Message-ID: <87fr3bhqkk.fsf@bootlin.com> (raw)
In-Reply-To: <20260527175527.2247679-5-s-k6@ti.com> (Santhosh Kumar K.'s message of "Wed, 27 May 2026 23:25:18 +0530")

Hi Santhosh,

> --- a/drivers/spi/spi-mem.c
> +++ b/drivers/spi/spi-mem.c
> @@ -398,7 +398,11 @@ int spi_mem_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
>  	u8 *tmpbuf;
>  	int ret;
>  
> -	/* Make sure the operation frequency is correct before going futher */
> +	/*
> +	 * Ops not configured for maximum speed are limited to the conservative
> +	 * base speed; spi_mem_adjust_op_freq() then caps to the device maximum.
> +	 */
> +	spi_mem_apply_base_freq_cap(mem, (struct spi_mem_op *)op);
>  	spi_mem_adjust_op_freq(mem, (struct spi_mem_op *)op);

There are many more spi_mem_adjust_op_freq() calls in the core where we would
not apply the base frequency. Aren't we missing these places? Wouldn't it
be more appropriate to call spi_mem_apply_base_freq_cap() at the beginning
of spi_mem_adjust_op_freq() ?

Thanks,
Miquèl

  parent reply	other threads:[~2026-05-28  8:43 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-27 17:55 [PATCH v3 00/13] spi: cadence-quadspi: add PHY tuning support Santhosh Kumar K
2026-05-27 17:55 ` [PATCH v3 01/13] spi: dt-bindings: allow spi-max-frequency to specify a frequency pair Santhosh Kumar K
2026-05-27 18:17   ` sashiko-bot
2026-05-28  8:32   ` Miquel Raynal
2026-05-27 17:55 ` [PATCH v3 02/13] spi: dt-bindings: cdns,qspi-nor: add PHY tuning pattern partition property Santhosh Kumar K
2026-05-27 18:11   ` sashiko-bot
2026-05-28  8:34   ` Miquel Raynal
2026-05-27 17:55 ` [PATCH v3 03/13] spi: parse two-element spi-max-frequency property Santhosh Kumar K
2026-05-27 18:19   ` sashiko-bot
2026-05-28  8:37   ` Miquel Raynal
2026-05-27 17:55 ` [PATCH v3 04/13] spi: spi-mem: add spi_mem_apply_base_freq_cap() Santhosh Kumar K
2026-05-27 18:32   ` sashiko-bot
2026-05-28  8:43   ` Miquel Raynal [this message]
2026-05-27 17:55 ` [PATCH v3 05/13] spi: spi-mem: add execute_tuning callback and spi_mem_execute_tuning() Santhosh Kumar K
2026-05-27 18:21   ` sashiko-bot
2026-05-28  8:44   ` Miquel Raynal
2026-05-27 17:55 ` [PATCH v3 06/13] spi: cadence-quadspi: move cqspi_readdata_capture earlier Santhosh Kumar K
2026-05-27 17:55 ` [PATCH v3 07/13] spi: cadence-quadspi: add DQS support to read data capture Santhosh Kumar K
2026-05-27 18:17   ` sashiko-bot
2026-05-27 17:55 ` [PATCH v3 08/13] spi: cadence-quadspi: add PHY tuning support Santhosh Kumar K
2026-05-27 18:44   ` sashiko-bot
2026-05-28  8:54   ` Miquel Raynal
2026-05-27 17:55 ` [PATCH v3 09/13] spi: cadence-quadspi: reject 2-byte-address DDR ops on PHY-tunable hardware Santhosh Kumar K
2026-05-28  9:01   ` Miquel Raynal
2026-05-27 17:55 ` [PATCH v3 10/13] spi: cadence-quadspi: enable PHY for direct reads and indirect writes Santhosh Kumar K
2026-05-27 18:36   ` sashiko-bot
2026-05-28  9:09   ` Miquel Raynal
2026-05-27 17:55 ` [PATCH v3 11/13] mtd: spinand: run PHY tuning after init and update dirmap frequencies Santhosh Kumar K
2026-05-27 19:04   ` sashiko-bot
2026-05-28  9:27   ` Miquel Raynal
2026-05-27 17:55 ` [PATCH v3 12/13] mtd: spi-nor: extract read op template construction into helper Santhosh Kumar K
2026-05-27 17:55 ` [PATCH v3 13/13] mtd: spi-nor: run PHY tuning after init and update dirmap frequency Santhosh Kumar K
2026-05-27 18:59   ` sashiko-bot
2026-05-28  8:30 ` [PATCH v3 00/13] spi: cadence-quadspi: add PHY tuning support Miquel Raynal

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