spi_mpc83xx: rework chip selects handling
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>
diff --git a/arch/powerpc/platforms/83xx/mpc832x_rdb.c b/arch/powerpc/platforms/83xx/mpc832x_rdb.c
index 2a1295f..28e23cd 100644
--- a/arch/powerpc/platforms/83xx/mpc832x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc832x_rdb.c
@@ -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 @@
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 */
diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index a01c89d..a46c1c8 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -420,8 +420,8 @@
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 @@
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 @@
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 @@
}
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);
}
diff --git a/arch/powerpc/sysdev/fsl_soc.h b/arch/powerpc/sysdev/fsl_soc.h
index 9c744e4..b5f3456 100644
--- a/arch/powerpc/sysdev/fsl_soc.h
+++ b/arch/powerpc/sysdev/fsl_soc.h
@@ -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 @@
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);
diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c
index df64200..b95085a 100644
--- a/drivers/spi/spi_mpc83xx.c
+++ b/drivers/spi/spi_mpc83xx.c
@@ -89,9 +89,6 @@
bool qe_mode;
- void (*activate_cs) (u8 cs, u8 polarity);
- void (*deactivate_cs) (u8 cs, u8 polarity);
-
u8 busy;
struct workqueue_struct *workqueue;
@@ -153,15 +150,14 @@
static void mpc83xx_spi_chipselect(struct spi_device *spi, int value)
{
- struct mpc83xx_spi *mpc83xx_spi;
- u8 pol = spi->mode & SPI_CS_HIGH ? 1 : 0;
+ struct mpc83xx_spi *mpc83xx_spi = spi_master_get_devdata(spi->master);
+ struct fsl_spi_platform_data *pdata = spi->dev.parent->platform_data;
+ bool pol = spi->mode & SPI_CS_HIGH;
struct spi_mpc83xx_cs *cs = spi->controller_state;
- mpc83xx_spi = spi_master_get_devdata(spi->master);
-
if (value == BITBANG_CS_INACTIVE) {
- if (mpc83xx_spi->deactivate_cs)
- mpc83xx_spi->deactivate_cs(spi->chip_select, pol);
+ if (pdata->cs_control)
+ pdata->cs_control(spi, !pol);
}
if (value == BITBANG_CS_ACTIVE) {
@@ -186,8 +182,8 @@
mpc83xx_spi_write_reg(mode, regval);
local_irq_restore(flags);
}
- if (mpc83xx_spi->activate_cs)
- mpc83xx_spi->activate_cs(spi->chip_select, pol);
+ if (pdata->cs_control)
+ pdata->cs_control(spi, pol);
}
}
@@ -582,8 +578,6 @@
master->cleanup = mpc83xx_spi_cleanup;
mpc83xx_spi = spi_master_get_devdata(master);
- mpc83xx_spi->activate_cs = pdata->activate_cs;
- mpc83xx_spi->deactivate_cs = pdata->deactivate_cs;
mpc83xx_spi->qe_mode = pdata->qe_mode;
mpc83xx_spi->get_rx = mpc83xx_spi_rx_buf_u8;
mpc83xx_spi->get_tx = mpc83xx_spi_tx_buf_u8;
diff --git a/include/linux/fsl_devices.h b/include/linux/fsl_devices.h
index d9051d7..7bc1b64 100644
--- a/include/linux/fsl_devices.h
+++ b/include/linux/fsl_devices.h
@@ -95,14 +95,15 @@
#define FSL_USB2_PORT0_ENABLED 0x00000001
#define FSL_USB2_PORT1_ENABLED 0x00000002
+struct spi_device;
+
struct fsl_spi_platform_data {
u32 initial_spmode; /* initial SPMODE value */
u16 bus_num;
bool qe_mode;
/* board specific information */
u16 max_chipselect;
- 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;
};