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| author | Max Krummenacher <max.krummenacher@toradex.com> | 2015-02-04 13:09:49 +0100 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2015-12-26 14:33:12 +0100 |
| commit | 8437c2f0e4fafb9a31dd260704cc6b7a22bf33f8 (patch) | |
| tree | 47947ea7c4bf15c7b2c877d29bf8a608fffe7a11 /drivers/pci | |
| parent | f2bb337d37acd680404371d2530a486bfe821ce2 (diff) | |
pcie-imx6: improve reset function for reseting EP
If the reset gpio for a PCIe switch is invalid, but a gpio for
reseting downstream EP devices is valid no reset pulse for the EP devices is
generated.
(i.e. in the device tree reset-gpio is not defined but reset-ep-gpio is defined)
The patch fixes this.
Original patch from Juha Kokkonen, Huoltamoeletroniikka Ky
(cherry picked from commit f593ebc9921013a992c1d096bf4cbad17c1af01b)
Conflicts:
drivers/pci/host/pci-imx6.c
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pci-imx6.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index add3a42672bd..d5d9f7991a84 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -421,6 +421,11 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp) * handle the rest of the reset toggling. */ mdelay(20); + } else if (gpio_is_valid(imx6_pcie->reset_ep_gpio)) { + gpio_set_value_cansleep(imx6_pcie->reset_ep_gpio, 1); + mdelay(100); + gpio_set_value_cansleep(imx6_pcie->reset_ep_gpio, 0); + mdelay(20); } else { /* allow the clocks to stabilize */ udelay(200); |