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-rw-r--r--drivers/misc/pch_phub.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/misc/pch_phub.c b/drivers/misc/pch_phub.c
index 1dd18f500730..e42bdc90fa27 100644
--- a/drivers/misc/pch_phub.c
+++ b/drivers/misc/pch_phub.c
@@ -58,6 +58,7 @@
/* CM-iTC */
#define CLKCFG_UART_48MHZ (1 << 16)
+#define CLKCFG_UART_25MHZ (2 << 16)
#define CLKCFG_BAUDDIV (2 << 20)
#define CLKCFG_PLL2VCO (8 << 9)
#define CLKCFG_UARTCLKSEL (1 << 18)
@@ -748,6 +749,16 @@ static int pch_phub_probe(struct pci_dev *pdev,
iowrite32(0x25, chip->pch_phub_base_address + 0x44);
chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
+
+ /* quirk for MIPS Boston platform */
+ if (pdev->dev.of_node) {
+ if (of_machine_is_compatible("img,boston")) {
+ pch_phub_read_modify_write_reg(chip,
+ (unsigned int)CLKCFG_REG_OFFSET,
+ CLKCFG_UART_25MHZ,
+ CLKCFG_UART_MASK);
+ }
+ }
} else if (id->driver_data == 2) { /* ML7213 IOH */
ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
if (ret)