| Message ID | 20170119163631.10668-3-andrew.smirnov@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
Am Donnerstag, den 19.01.2017, 08:36 -0800 schrieb Andrey Smirnov: > Some designs implement reset GPIO via a GPIO expander connected to a > peripheral bus. One such example would be i.MX7 Sabre board where said > GPIO is provided by SPI shift register connected to a bitbanged SPI > bus. In order to support such designs allow reset GPIO request to defer > probing of the driver. > > Cc: yurovsky@gmail.com > Cc: Richard Zhu <hongxing.zhu@nxp.com> > Cc: Lucas Stach <l.stach@pengutronix.de> > Cc: Bjorn Helgaas <bhelgaas@google.com> > Cc: Fabio Estevam <festevam@gmail.com> > Cc: Shawn Guo <shawnguo@kernel.org> > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> > --- > drivers/pci/host/pci-imx6.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c > index 50a1291..574f026 100644 > --- a/drivers/pci/host/pci-imx6.c > +++ b/drivers/pci/host/pci-imx6.c > @@ -653,6 +653,9 @@ static int __init imx6_pcie_probe(struct platform_device *pdev) > dev_err(dev, "unable to get reset gpio\n"); > return ret; > } > + } else if (imx6_pcie->reset_gpio == -EPROBE_DEFER) { > + dev_info(dev, "probe is defered by reset GPIO\n"); No, please no messages for probe deferrals, as those might happen quite often until the required driver is there and then just spams the logs. Otherwise looks good. > + return imx6_pcie->reset_gpio; > } > > /* Fetch clocks */ > @@ -746,11 +749,12 @@ static struct platform_driver imx6_pcie_driver = { > .name = "imx6q-pcie", > .of_match_table = imx6_pcie_of_match, > }, > + .probe = imx6_pcie_probe, > .shutdown = imx6_pcie_shutdown, > }; > > static int __init imx6_pcie_init(void) > { > - return platform_driver_probe(&imx6_pcie_driver, imx6_pcie_probe); > + return platform_driver_register(&imx6_pcie_driver); > } > device_initcall(imx6_pcie_init); -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Andrey,
[auto build test WARNING on pci/next]
[also build test WARNING on v4.10-rc4 next-20170120]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Andrey-Smirnov/PCI-imx6-Fix-a-typo-in-error-message/20170120-163928
base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: arm-allyesconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm
All warnings (new ones prefixed by >>):
>> WARNING: drivers/built-in.o(.data+0x6948c): Section mismatch in reference from the variable imx6_pcie_driver to the function .init.text:imx6_pcie_probe()
The variable imx6_pcie_driver references
the function __init imx6_pcie_probe()
If the reference is valid then annotate the
variable with or __refdata (see linux/init.h) or name the variable:
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 50a1291..574f026 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -653,6 +653,9 @@ static int __init imx6_pcie_probe(struct platform_device *pdev) dev_err(dev, "unable to get reset gpio\n"); return ret; } + } else if (imx6_pcie->reset_gpio == -EPROBE_DEFER) { + dev_info(dev, "probe is defered by reset GPIO\n"); + return imx6_pcie->reset_gpio; } /* Fetch clocks */ @@ -746,11 +749,12 @@ static struct platform_driver imx6_pcie_driver = { .name = "imx6q-pcie", .of_match_table = imx6_pcie_of_match, }, + .probe = imx6_pcie_probe, .shutdown = imx6_pcie_shutdown, }; static int __init imx6_pcie_init(void) { - return platform_driver_probe(&imx6_pcie_driver, imx6_pcie_probe); + return platform_driver_register(&imx6_pcie_driver); } device_initcall(imx6_pcie_init);
Some designs implement reset GPIO via a GPIO expander connected to a peripheral bus. One such example would be i.MX7 Sabre board where said GPIO is provided by SPI shift register connected to a bitbanged SPI bus. In order to support such designs allow reset GPIO request to defer probing of the driver. Cc: yurovsky@gmail.com Cc: Richard Zhu <hongxing.zhu@nxp.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Fabio Estevam <festevam@gmail.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> --- drivers/pci/host/pci-imx6.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)