[RFC PATCH v1 17/20] HACK: drivers: mfd: set bar configuration for RP1 driver

[Oleksii Moisieiev]

Set bar address in the correct order. RP1 driver in Linux Kernel rely on
the pci BAR configuration which initializes BARs based on BAR size.
This results the Linux set BARs in the same order on each boot.
U-boot does initialization without any sorting so the configuration
may be different from the Linux kernel.
Here BAR address configuration is set to match the Linux Kernel order
to avoid fails on address translation.
This should be changed after upstreaming RP1 driver to the Linux kernel
mainline.

Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev at epam.com>
Reviewed-by: Volodymyr Babchuk <volodymyr_babchuk at epam.com>
---

 drivers/mfd/rp1.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/mfd/rp1.c b/drivers/mfd/rp1.c
index 265ed668f5..64008007be 100644
--- a/drivers/mfd/rp1.c
+++ b/drivers/mfd/rp1.c
@@ -63,6 +63,20 @@ static int rp1_probe(struct udevice *dev)
 	/* Turn on bus-mastering */
 	dm_pci_clrset_config16(dev, PCI_COMMAND, 0, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
 
+	/*
+	 * HACK: Set bar address in the correct order. RP1 driver in Linux Kernel rely on
+	 * the pci BAR configuration which initializes BARs based on BAR size.
+	 * This results the Linux set BARs in the same order on each boot.
+	 * U-boot does initialization without any sorting so the configuration
+	 * may be different from the Linux kernel.
+	 * Here BAR address configuration is set to match the Linux Kernel order
+	 * to avoid fails on address translation.
+	 * This should be changed after upstreaming RP1 driver to the Linux kernel
+	 * mainline.
+	 */
+	dm_pci_write_config32(dev, PCI_BASE_ADDRESS_1, 0);
+	dm_pci_write_config32(dev, PCI_BASE_ADDRESS_0, 0x40000);
+
 	ret = rp1_get_bar_region(dev, &rp1->bar_start);
 	if (ret)
 		return ret;
-- 
2.34.1