Messages in this thread Patch in this message | | | From | Zubair Lutfullah Kakakhel <> | Subject | [RFC 1/3] misc: pch_phub: Read prefetch value from device tree if passed | Date | Wed, 20 Jul 2016 18:21:15 +0100 |
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The default prefetch value for the eg20t device is hard coded to 0x000affaa.
Add support for an alternative to be read from DT if available
Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> --- drivers/misc/pch_phub.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/pch_phub.c b/drivers/misc/pch_phub.c index 4810e03..9b010a7 100644 --- a/drivers/misc/pch_phub.c +++ b/drivers/misc/pch_phub.c @@ -711,6 +711,12 @@ static int pch_phub_probe(struct pci_dev *pdev, if (id->driver_data == 1) { /* EG20T PCH */ const char *board_name; + unsigned int prefetch = 0x000affaa; + + if (pdev->dev.of_node) + of_property_read_u32(pdev->dev.of_node, + "intel,eg20t-prefetch", + &prefetch); ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr); @@ -736,7 +742,7 @@ static int pch_phub_probe(struct pci_dev *pdev, CLKCFG_UART_MASK); /* set the prefech value */ - iowrite32(0x000affaa, chip->pch_phub_base_address + 0x14); + iowrite32(prefetch, chip->pch_phub_base_address + 0x14); /* set the interrupt delay value */ iowrite32(0x25, chip->pch_phub_base_address + 0x44); chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T; -- 1.9.1
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