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spi_mpc83xx: rework chip selects handling

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The main purpose of this patch is to pass 'struct spi_device' to the chip
select handling routines.  This is needed so that we could implement
full-fledged OpenFirmware support for this driver.

While at it, also:
- Replace two {de,activate}_cs routines by single cs_contol().
- Don't duplicate platform data callbacks in mpc83xx_spi struct.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Anton Vorontsov
2009-03-31 15:24:36 -07:00
committed by Linus Torvalds
parent 34c8a20c6e
commit 364fdbc00f
5 changed files with 23 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/powerpc/platforms/83xx/mpc832x_rdb.c
+4 -12
View File
@@ -39,16 +39,10 @@
#endif
#ifdef CONFIG_QUICC_ENGINE
static void mpc83xx_spi_activate_cs(u8 cs, u8 polarity)
static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on)
{
pr_debug("%s %d %d\n", __func__, cs, polarity);
par_io_data_set(3, 13, polarity);
}
static void mpc83xx_spi_deactivate_cs(u8 cs, u8 polarity)
{
pr_debug("%s %d %d\n", __func__, cs, polarity);
par_io_data_set(3, 13, !polarity);
pr_debug("%s %d %d\n", __func__, spi->chip_select, on);
par_io_data_set(3, 13, on);
}
static struct mmc_spi_platform_data mpc832x_mmc_pdata = {
@@ -74,9 +68,7 @@ static int __init mpc832x_spi_init(void)
par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */
par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */
return fsl_spi_init(&mpc832x_spi_boardinfo, 1,
mpc83xx_spi_activate_cs,
mpc83xx_spi_deactivate_cs);
return fsl_spi_init(&mpc832x_spi_boardinfo, 1, mpc83xx_spi_cs_control);
}
machine_device_initcall(mpc832x_rdb, mpc832x_spi_init);
#endif /* CONFIG_QUICC_ENGINE */
arch/powerpc/sysdev/fsl_soc.c
+6 -8
View File
@@ -420,8 +420,8 @@ arch_initcall(fsl_usb_of_init);
static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
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))
void (*cs_control)(struct spi_device *dev,
bool on))
{
struct device_node *np;
unsigned int i = 0;
@@ -433,8 +433,7 @@ static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
struct resource res[2];
struct platform_device *pdev;
struct fsl_spi_platform_data pdata = {
.activate_cs = activate_cs,
.deactivate_cs = deactivate_cs,
.cs_control = cs_control,
};
memset(res, 0, sizeof(res));
@@ -501,8 +500,7 @@ next:
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))
void (*cs_control)(struct spi_device *spi, bool on))
{
u32 sysclk = -1;
int ret;
@@ -518,10 +516,10 @@ int __init fsl_spi_init(struct spi_board_info *board_infos,
}
ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
num_board_infos, activate_cs, deactivate_cs);
num_board_infos, cs_control);
if (!ret)
of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
num_board_infos, activate_cs, deactivate_cs);
num_board_infos, cs_control);
return spi_register_board_info(board_infos, num_board_infos);
}
arch/powerpc/sysdev/fsl_soc.h
+3 -2
View File
@@ -4,6 +4,8 @@
#include <asm/mmu.h>
struct spi_device;
extern phys_addr_t get_immrbase(void);
#if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
extern u32 get_brgfreq(void);
@@ -19,8 +21,7 @@ struct device_node;
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));
void (*cs_control)(struct spi_device *spi, bool on));
extern void fsl_rstcr_restart(char *cmd);