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[POWERPC] fsl_soc: add support for fsl_spi 

Add helper function to setup SPI bus/device information

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Anton Vorontsov 2007-08-23 15:35:56 +04:00 committed by Kumar Gala
parent af6a9aabc1
commit 26f6cb9993
2 changed files with 94 additions and 0 deletions
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87
arch/powerpc/sysdev/fsl_soc.c
View File

@ -24,6 +24,7 @@
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/spi/spi.h>
#include <linux/fsl_devices.h>
#include <linux/fs_enet_pd.h>
#include <linux/fs_uart_pd.h>
@ -1199,3 +1200,89 @@ err:
arch_initcall(cpm_smc_uart_of_init);
#endif /* CONFIG_8xx */
int __init fsl_spi_init(struct spi_board_info *board_infos,
unsigned int num_board_infos,
void (*activate_cs)(u8 cs, u8 polarity),
void (*deactivate_cs)(u8 cs, u8 polarity))
{
struct device_node *np;
unsigned int i;
const u32 *sysclk;
np = of_find_node_by_type(NULL, "qe");
if (!np)
return -ENODEV;
sysclk = of_get_property(np, "bus-frequency", NULL);
if (!sysclk)
return -ENODEV;
for (np = NULL, i = 1;
(np = of_find_compatible_node(np, "spi", "fsl_spi")) != NULL;
i++) {
int ret = 0;
unsigned int j;
const void *prop;
struct resource res[2];
struct platform_device *pdev;
struct fsl_spi_platform_data pdata = {
.activate_cs = activate_cs,
.deactivate_cs = deactivate_cs,
};
memset(res, 0, sizeof(res));
pdata.sysclk = *sysclk;
prop = of_get_property(np, "reg", NULL);
if (!prop)
goto err;
pdata.bus_num = *(u32 *)prop;
prop = of_get_property(np, "mode", NULL);
if (prop && !strcmp(prop, "cpu-qe"))
pdata.qe_mode = 1;
for (j = 0; j < num_board_infos; j++) {
if (board_infos[j].bus_num == pdata.bus_num)
pdata.max_chipselect++;
}
if (!pdata.max_chipselect)
goto err;
ret = of_address_to_resource(np, 0, &res[0]);
if (ret)
goto err;
ret = of_irq_to_resource(np, 0, &res[1]);
if (ret == NO_IRQ)
goto err;
pdev = platform_device_alloc("mpc83xx_spi", i);
if (!pdev)
goto err;
ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
if (ret)
goto unreg;
ret = platform_device_add_resources(pdev, res,
ARRAY_SIZE(res));
if (ret)
goto unreg;
ret = platform_device_register(pdev);
if (ret)
goto unreg;
continue;
unreg:
platform_device_del(pdev);
err:
continue;
}
return spi_register_board_info(board_infos, num_board_infos);
}

7
arch/powerpc/sysdev/fsl_soc.h
View File

@ -8,5 +8,12 @@ extern phys_addr_t get_immrbase(void);
extern u32 get_brgfreq(void);
extern u32 get_baudrate(void);
struct spi_board_info;
extern int fsl_spi_init(struct spi_board_info *board_infos,
unsigned int num_board_infos,
void (*activate_cs)(u8 cs, u8 polarity),
void (*deactivate_cs)(u8 cs, u8 polarity));
#endif
#endif