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spi: pxa2xx: Respect Intel SSP type given by a property

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Allow to set the Intel SSP type by reading the property.
Only apply this to the known MFD enumerated LPSS devices.

The check is done by the looking for the specifically
named IO memory resource provided by upper layer. This
won't be an issue in the future because we strictly
prioritize the order in which we are looking for the SSP
type in the code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221021190018.63646-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andy Shevchenko
2022-10-21 22:00:16 +03:00
committed by Mark Brown
parent 88a947215c
commit 1a1864cd87
1 changed files with 12 additions and 0 deletions
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12
drivers/spi/spi-pxa2xx.c
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@@ -1462,9 +1462,12 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
const struct pci_device_id *pcidev_id = NULL;
enum pxa_ssp_type type = SSP_UNDEFINED;
const void *match;
bool is_lpss_priv;
int status;
u64 uid;
is_lpss_priv = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpss_priv");
if (pcidev)
pcidev_id = pci_match_id(pxa2xx_spi_pci_compound_match, pcidev);
@@ -1473,6 +1476,15 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
type = (enum pxa_ssp_type)match;
else if (pcidev_id)
type = (enum pxa_ssp_type)pcidev_id->driver_data;
else if (is_lpss_priv) {
u32 value;
status = device_property_read_u32(dev, "intel,spi-pxa2xx-type", &value);
if (status)
return ERR_PTR(status);
type = (enum pxa_ssp_type)value;
}
/* Validate the SSP type correctness */
if (!(type > SSP_UNDEFINED && type < SSP_MAX))