[PATCH 2/2] spi/fsl-lib: Get the SPI controller bus number from DTS
From: Hou Zhiqiang <hidden>
Date: 2014-03-14 09:35:57
Also in:
linux-spi
Subsystem:
spi subsystem, the rest · Maintainers:
Mark Brown, Linus Torvalds
Possibly related (same subject, not in this thread)
- 2014-03-19 · Re: [PATCH 2/2] spi/fsl-lib: Get the SPI controller bus number from DTS · Mark Brown <hidden>
- 2014-03-19 · Re: [PATCH 2/2] spi/fsl-lib: Get the SPI controller bus number from DTS · Scott Wood <hidden>
- 2014-03-19 · RE: [PATCH 2/2] spi/fsl-lib: Get the SPI controller bus number from DTS · B48286-KZfg59tc24xl57MIdRCFDg@public.gmane.org <hidden>
- 2014-03-18 · Re: [PATCH 2/2] spi/fsl-lib: Get the SPI controller bus number from DTS · Scott Wood <hidden>
- 2014-03-18 · RE: [PATCH 2/2] spi/fsl-lib: Get the SPI controller bus number from DTS · B48286-KZfg59tc24xl57MIdRCFDg@public.gmane.org <hidden>
Get the spi_master's bus_num from DTS to make the spi_master's name static. So "mtdparts=spi.bus_num.chip_select:..." in cmdline can be used to asign mtd partions of spi flash. Signed-off-by: Hou Zhiqiang <redacted> --- drivers/spi/spi-fsl-lib.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/spi/spi-fsl-lib.c b/drivers/spi/spi-fsl-lib.c
index 0b75f26..f5f0307b 100644
--- a/drivers/spi/spi-fsl-lib.c
+++ b/drivers/spi/spi-fsl-lib.c@@ -198,7 +198,7 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev) struct mpc8xxx_spi_probe_info *pinfo; struct fsl_spi_platform_data *pdata; const void *prop; - int ret = -ENOMEM; + int ret = -ENOMEM, bus_num; pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL); if (!pinfo)
@@ -207,8 +207,12 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev) pdata = &pinfo->pdata; dev->platform_data = pdata; - /* Allocate bus num dynamically. */ - pdata->bus_num = -1; + ret = of_property_read_u32(np, "bus-num", &bus_num); + if (ret < 0) { + /* Allocate bus num dynamically. */ + bus_num = -1; + } + pdata->bus_num = bus_num; #ifdef CONFIG_FSL_SOC /* SPI controller is either clocked from QE or SoC clock. */
--
1.8.5
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