From: Ard Biesheuvel ardb@kernel.org
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: 55750148e559 ("i2c: synquacer: Fix an error handling path in synquacer_i2c_probe()") Cc: stable@vger.kernel.org Cc: Andi Shyti andi.shyti@kernel.org Cc: Christophe JAILLET christophe.jaillet@wanadoo.fr Signed-off-by: Ard Biesheuvel ardb@kernel.org --- https://lore.kernel.org/all/CAMj1kXFH+zB_YuUS+vaEpguhuVGLYbQw55VNDCxnBfSPe6b...
drivers/i2c/busses/i2c-synquacer.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-synquacer.c b/drivers/i2c/busses/i2c-synquacer.c index 4eccbcd0fbfc..bbb9062669e4 100644 --- a/drivers/i2c/busses/i2c-synquacer.c +++ b/drivers/i2c/busses/i2c-synquacer.c @@ -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)