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From: Ralph Siemsen <ralph.siemsen@linaro.org>
To: Marek Vasut <marek.vasut@mailbox.org>
Cc: u-boot@lists.u-boot-project.org, Tom Rini <trini@konsulko.com>,
	Michal Simek <michal.simek@amd.com>,
	Marek Vasut <marek.vasut+renesas@mailbox.org>,
	Padmarao Begari <padmarao.begari@amd.com>,
	Anshul Dalal <anshuld@ti.com>,
	Neha Malcom Francis <n-francis@ti.com>,
	Johan Jonker <jbx6244@gmail.com>,
	Quentin Schulz <quentin.schulz@cherry.de>,
	Patrice Chotard <patrice.chotard@foss.st.com>
Subject: Re: [PATCH v2 1/3] spi: cadence_qspi: enable all clocks
Date: Sat, 15 Aug 2026 10:09:11 -0400	[thread overview]
Message-ID: <aoBzB2o_KUD6NwrC@maple.netwinder.org> (raw)
In-Reply-To: <43fec897-24f2-40f6-b1d4-63a7a171a013@mailbox.org>

On Sat, Aug 15, 2026 at 12:03:55AM +0200, Marek Vasut wrote:
>On 8/14/26 8:28 PM, Ralph Siemsen wrote:
>
>[...]
>
>>@@ -250,7 +250,11 @@ static int cadence_spi_probe(struct udevice *bus)
>>  			return ret;
>>  #endif
>>  		} else {
>>-			priv->ref_clk_hz = clk_get_rate(&clk);
>>+			ret = clk_enable_bulk(&clks);
>
>Some sort of clk_disable_bulk() seems to be missing.
>
>Fail path which disables the clock seems to be missing too in this function.

Ack for both.

>>+			if (ret)
>>+				dev_warn(bus, "failed clk_enable_bulk\n");
>>+
>>+			priv->ref_clk_hz = clk_get_rate(&clks.clks[0]);
>
>Can the refclock be second or later (not first) clock in the list of 
>multiple clock in DT ? If yes, then the clk_get_rate[0] will return 
>bogus rate for another clock.

The right solution is to get the clock by name. But once again we have a 
pile of existing boards which may not have the correct name ("ref") in 
their device tree. So I went with the simple option of continuing to 
assume that the first clock is the refclock.

Ralph

  reply	other threads:[~2026-08-15 14:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-14 18:28 [PATCH v2 0/3] spi: cadence_qspi: clock enable, compatible, write protect Ralph Siemsen
2026-08-14 18:28 ` [PATCH v2 1/3] spi: cadence_qspi: enable all clocks Ralph Siemsen
2026-08-14 22:03   ` Marek Vasut via U-Boot
2026-08-15 14:09     ` Ralph Siemsen [this message]
2026-08-16 11:27       ` Marek Vasut via U-Boot
2026-08-14 18:28 ` [PATCH v2 2/3] spi: cadence_qspi: add RZ/N1 compatible Ralph Siemsen
2026-08-14 18:28 ` [PATCH v2 3/3] spi: cadence_qspi: Use APB write protection Ralph Siemsen
2026-08-14 22:04   ` Marek Vasut via U-Boot

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