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| author | Jagan Teki <jteki@openedev.com> | 2015-06-27 00:51:34 +0530 |
|---|---|---|
| committer | Jagan Teki <jteki@openedev.com> | 2015-07-01 21:15:03 +0530 |
| commit | cdc9dd0750bcff780d54050512206fcf2ad05489 (patch) | |
| tree | a17b748128e60aa2e7baafee4aed1af823c8eb83 /drivers/spi | |
| parent | a8a8fc9ceea8430224c8c0ac932a75c029a1e225 (diff) | |
| download | u-boot-imx-cdc9dd0750bcff780d54050512206fcf2ad05489.zip u-boot-imx-cdc9dd0750bcff780d54050512206fcf2ad05489.tar.gz u-boot-imx-cdc9dd0750bcff780d54050512206fcf2ad05489.tar.bz2 | |
spi: zynq_spi: Add fdt support in driver
Now zynq spi driver platform data is controlled by devicetree,
enable the status by saying "okay" on respective board dts to use
the devicetree generated platdata.
Ex:
&spi1 {
status = "okay";
};
Signed-off-by: Jagan Teki <jteki@openedev.com>
Acked-by: Simon Glass <sjg@chromium.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Tested-by: Jagan Teki <jteki@openedev.com>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/zynq_spi.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/spi/zynq_spi.c b/drivers/spi/zynq_spi.c index 50fb1aa..c5c3e10 100644 --- a/drivers/spi/zynq_spi.c +++ b/drivers/spi/zynq_spi.c @@ -13,9 +13,12 @@ #include <errno.h> #include <malloc.h> #include <spi.h> +#include <fdtdec.h> #include <asm/io.h> #include <asm/arch/hardware.h> +DECLARE_GLOBAL_DATA_PTR; + /* zynq spi register bit masks ZYNQ_SPI_<REG>_<BIT>_MASK */ #define ZYNQ_SPI_CR_MSA_MASK (1 << 15) /* Manual start enb */ #define ZYNQ_SPI_CR_MCS_MASK (1 << 14) /* Manual chip select */ @@ -63,22 +66,22 @@ struct zynq_spi_priv { u32 freq; /* required frequency */ }; -static inline struct zynq_spi_regs *get_zynq_spi_regs(struct udevice *bus) -{ - if (bus->seq) - return (struct zynq_spi_regs *)ZYNQ_SPI_BASEADDR1; - else - return (struct zynq_spi_regs *)ZYNQ_SPI_BASEADDR0; -} - static int zynq_spi_ofdata_to_platdata(struct udevice *bus) { struct zynq_spi_platdata *plat = bus->platdata; + const void *blob = gd->fdt_blob; + int node = bus->of_offset; + + plat->regs = (struct zynq_spi_regs *)fdtdec_get_addr(blob, node, "reg"); - plat->regs = get_zynq_spi_regs(bus); - plat->frequency = 166666700; + /* FIXME: Use 250MHz as a suitable default */ + plat->frequency = fdtdec_get_int(blob, node, "spi-max-frequency", + 250000000); plat->speed_hz = plat->frequency / 2; + debug("zynq_spi_ofdata_to_platdata: regs=%p max-frequency=%d\n", + plat->regs, plat->frequency); + return 0; } |