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| author | Richard Zhu <r65037@freescale.com> | 2013-12-12 22:50:03 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-12-19 11:02:34 -0700 |
| commit | bc9ef770047a931787e1b1e092dbe3993ce4e0fb (patch) | |
| tree | 0958540a9f6b9c6825d11e7154dbe658c0f7599e /drivers/pci/host | |
| parent | fa33a6d87eac1ab1457e632d32b7b4b74172e699 (diff) | |
| download | linux-bc9ef770047a931787e1b1e092dbe3993ce4e0fb.tar.gz linux-bc9ef770047a931787e1b1e092dbe3993ce4e0fb.tar.bz2 linux-bc9ef770047a931787e1b1e092dbe3993ce4e0fb.zip | |
PCI: imx6: Fix bugs in PCIe startup code
LTSSM shouldn't be set once in assert_core_reset(). Move peripheral reset
just before LTSSM start.
Signed-off-by: Richard Zhu <r65037@freescale.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Frank Li <lznuaa@gmail.com>
Cc: Harro Haan <hrhaan@gmail.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Mohit KUMAR <Mohit.KUMAR@st.com>
Cc: Pratyush Anand <pratyush.anand@st.com>
Cc: Richard Zhu <r65037@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Sean Cross <xobs@kosagi.com>
Cc: Siva Reddy Kallam <siva.kallam@samsung.com>
Cc: Srikanth T Shivanand <ts.srikanth@samsung.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Troy Kisky <troy.kisky@boundarydevices.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Diffstat (limited to 'drivers/pci/host')
| -rw-r--r-- | drivers/pci/host/pci-imx6.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index d34678dc5a14..e8663a8c3406 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -220,18 +220,9 @@ static int imx6_pcie_assert_core_reset(struct pcie_port *pp) regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_TEST_PD, 1 << 18); - regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6Q_GPR12_PCIE_CTL_2, 1 << 10); regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1, IMX6Q_GPR1_PCIE_REF_CLK_EN, 0 << 16); - /* Some boards don't have PCIe reset GPIO. */ - if (gpio_is_valid(imx6_pcie->reset_gpio)) { - gpio_set_value(imx6_pcie->reset_gpio, 0); - msleep(100); - gpio_set_value(imx6_pcie->reset_gpio, 1); - } - return 0; } @@ -275,6 +266,12 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp) /* allow the clocks to stabilize */ usleep_range(200, 500); + /* Some boards don't have PCIe reset GPIO. */ + if (gpio_is_valid(imx6_pcie->reset_gpio)) { + gpio_set_value(imx6_pcie->reset_gpio, 0); + msleep(100); + gpio_set_value(imx6_pcie->reset_gpio, 1); + } return 0; err_pcie_axi: |