i2c: designware: Add support to get I2C related timing parameters from firmware.

Similar to I2C designware platform driver add i2c_parse_fw_timings() in
PCI driver, to get I2C related timing parameters from firmware.
Signed-off-by: Sudarshan Ravula <sudarshan.ravula@intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-designware-pcidrv.c

@@ -243,6 +243,7 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
 	int r;
 	struct dw_pci_controller *controller;
 	struct dw_scl_sda_cfg *cfg;
+	struct i2c_timings *t;
 
 	if (id->driver_data >= ARRAY_SIZE(dw_pci_controllers))
 		return dev_err_probe(&pdev->dev, -EINVAL,
@@ -272,12 +273,14 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
 		return r;
 
 	dev->get_clk_rate_khz = controller->get_clk_rate_khz;
-	dev->timings.bus_freq_hz = I2C_MAX_FAST_MODE_FREQ;
 	dev->base = pcim_iomap_table(pdev)[0];
 	dev->dev = &pdev->dev;
 	dev->irq = pci_irq_vector(pdev, 0);
 	dev->flags |= controller->flags;
 
+	t = &dev->timings;
+	i2c_parse_fw_timings(&pdev->dev, t, false);
+
 	pci_set_drvdata(pdev, dev);
 
 	if (controller->setup) {