openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

PCI: artpec6: Stop enabling writes to DBI read-only registers 

Previously we enabled writes to the DBI read-only registers so the Class
Code fix in dw_pcie_setup_rc() would work.  But now dw_pcie_setup_rc()
enables write permission itself, so we don't need to do it here.

Stop enabling writes to the DBI read-only registers.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Roy Zang <tie-fei.zang@freescale.com>
This commit is contained in:
Hou Zhiqiang 2017-08-28 18:53:01 +08:00 committed by Bjorn Helgaas
parent c3f9093988
commit b015b37e66
1 changed files with 0 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/pci/dwc/pcie-artpec6.c
View File

@ -141,12 +141,6 @@ static int artpec6_pcie_establish_link(struct artpec6_pcie *artpec6_pcie)
artpec6_pcie_writel(artpec6_pcie, PCIECFG, val); artpec6_pcie_writel(artpec6_pcie, PCIECFG, val);
usleep_range(100, 200); usleep_range(100, 200);
/*
* Enable writing to config regs. This is required as the Synopsys
* driver changes the class code. That register needs DBI write enable.
*/
dw_pcie_writel_dbi(pci, MISC_CONTROL_1_OFF, DBI_RO_WR_EN);
/* setup root complex */ /* setup root complex */
dw_pcie_setup_rc(pp); dw_pcie_setup_rc(pp);