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spi/spi-fsl-spi: Make driver usable in CPU mode outside of an FSL_SOC environment

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This makes the spi-fsl-spi driver usable in CPU mode outside of an FSL_SOC and
even an powerpc environment by moving CPM mode functionality to a separate file
that is only compiled and linked in an FSL_SOC environment and adding some
ifdefs to hide types and functions or provide alternatives.

For devicetree probing a "clock-frequency" property is used for clock frequency
instead of calls to FSL_SOC-specific functions.

Acked-by: Anton Vorontsov <anton@enomsg.org>
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Andreas Larsson 2013-02-15 16:52:21 +01:00 • committed by Grant Likely
parent 58ad60bbb2
commit e8beacbb85
9 changed files with 520 additions and 405 deletions
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8
drivers/spi/spi-fsl-lib.c
View file

@ -23,7 +23,9 @@
#include <linux/mm.h>
#include <linux/of_platform.h>
#include <linux/spi/spi.h>
#ifdef CONFIG_FSL_SOC
#include <sysdev/fsl_soc.h>
#endif
#include "spi-fsl-lib.h"
@ -208,6 +210,7 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
/* Allocate bus num dynamically. */
pdata->bus_num = -1;
#ifdef CONFIG_FSL_SOC
/* SPI controller is either clocked from QE or SoC clock. */
pdata->sysclk = get_brgfreq();
if (pdata->sysclk == -1) {
@ -217,6 +220,11 @@ int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
goto err;
}
}
#else
ret = of_property_read_u32(np, "clock-frequency", &pdata->sysclk);
if (ret)
goto err;
#endif
prop = of_get_property(np, "mode", NULL);
if (prop && !strcmp(prop, "cpu-qe"))