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i2c: synquacer: Deal with optional PCLK correctly

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commit f2990f8630531a99cad4dc5c44cb2a11ded42492 upstream.

ACPI boot does not provide clocks and regulators, but instead, provides
the PCLK rate directly, and enables the clock in firmware. So deal
gracefully with this.

Fixes: 55750148e5 ("i2c: synquacer: Fix an error handling path in synquacer_i2c_probe()")
Cc: stable@vger.kernel.org # v6.10+
Cc: Andi Shyti <andi.shyti@kernel.org>
Cc: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ard Biesheuvel 2024-09-12 12:46:31 +02:00 committed by Greg Kroah-Hartman
parent 476ecb9a7b
commit 406c275efb
1 changed files with 3 additions and 2 deletions
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5
drivers/i2c/busses/i2c-synquacer.c
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@ -550,12 +550,13 @@ static int synquacer_i2c_probe(struct platform_device *pdev)
device_property_read_u32(&pdev->dev, "socionext,pclk-rate",
&i2c->pclkrate);
pclk = devm_clk_get_enabled(&pdev->dev, "pclk");
pclk = devm_clk_get_optional_enabled(&pdev->dev, "pclk");
if (IS_ERR(pclk))
return dev_err_probe(&pdev->dev, PTR_ERR(pclk),
"failed to get and enable clock\n");
i2c->pclkrate = clk_get_rate(pclk);
if (pclk)
i2c->pclkrate = clk_get_rate(pclk);
if (i2c->pclkrate < SYNQUACER_I2C_MIN_CLK_RATE ||
i2c->pclkrate > SYNQUACER_I2C_MAX_CLK_RATE)