The patch titled
spi: spi_bfin uses portmux for additional busses
has been added to the -mm tree. Its filename is
spi-spi_bfin-uses-portmux-for-additional-busses.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: spi: spi_bfin uses portmux for additional busses
From: Sonic Zhang <sonic.zhang@xxxxxxxxxx>
Use portmux mechanism to support SPI busses 1 and 2, instead of just the
original bus 0.
Signed-off-by: Sonic Zhang <sonic.zhang@xxxxxxxxxx>
Signed-off-by: Bryan Wu <bryan.wu@xxxxxxxxxx>
Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi_bfin5xx.c | 51 +++++++++++++++++++++---------------
1 file changed, 31 insertions(+), 20 deletions(-)
diff -puN drivers/spi/spi_bfin5xx.c~spi-spi_bfin-uses-portmux-for-additional-busses drivers/spi/spi_bfin5xx.c
--- a/drivers/spi/spi_bfin5xx.c~spi-spi_bfin-uses-portmux-for-additional-busses
+++ a/drivers/spi/spi_bfin5xx.c
@@ -209,17 +209,26 @@ static void cs_deactive(struct chip_data
write_FLAG(flag);
}
-#define MAX_SPI0_SSEL 7
+#define MAX_SPI_SSEL 7
/* stop controller and re-config current chip*/
static int restore_state(struct driver_data *drv_data)
{
struct chip_data *chip = drv_data->cur_chip;
int ret = 0;
- u16 ssel[MAX_SPI0_SSEL] = {P_SPI0_SSEL1, P_SPI0_SSEL2, P_SPI0_SSEL3,
- P_SPI0_SSEL4, P_SPI0_SSEL5,
- P_SPI0_SSEL6, P_SPI0_SSEL7,};
-
+ u16 ssel[3][MAX_SPI_SSEL] = {
+ {P_SPI0_SSEL1, P_SPI0_SSEL2, P_SPI0_SSEL3,
+ P_SPI0_SSEL4, P_SPI0_SSEL5,
+ P_SPI0_SSEL6, P_SPI0_SSEL7},
+
+ {P_SPI1_SSEL1, P_SPI1_SSEL2, P_SPI1_SSEL3,
+ P_SPI1_SSEL4, P_SPI1_SSEL5,
+ P_SPI1_SSEL6, P_SPI1_SSEL7},
+
+ {P_SPI2_SSEL1, P_SPI2_SSEL2, P_SPI2_SSEL3,
+ P_SPI2_SSEL4, P_SPI2_SSEL5,
+ P_SPI2_SSEL6, P_SPI2_SSEL7},
+ };
/* Clear status and disable clock */
write_STAT(BIT_STAT_CLR);
bfin_spi_disable(drv_data);
@@ -234,9 +243,9 @@ static int restore_state(struct driver_d
int i = chip->chip_select_num;
dev_dbg(&drv_data->pdev->dev, "chip select number is %d\n", i);
-
- if ((i > 0) && (i <= MAX_SPI0_SSEL))
- ret = peripheral_request(ssel[i-1], DRV_NAME);
+ if ((i > 0) && (i <= MAX_SPI_SSEL))
+ ret = peripheral_request(
+ ssel[drv_data->master->bus_num][i-1], DRV_NAME);
chip->chip_select_requested = 1;
}
@@ -329,7 +338,6 @@ static void u8_reader(struct driver_data
write_TDBR(0xFFFF);
dummy_read();
-
while (drv_data->rx < drv_data->rx_end - 1) {
while (!(read_STAT() & BIT_STAT_RXS))
continue;
@@ -640,7 +648,6 @@ static void pump_transfers(unsigned long
message = drv_data->cur_msg;
transfer = drv_data->cur_transfer;
chip = drv_data->cur_chip;
-
/*
* if msg is error or done, report it back using complete() callback
*/
@@ -1206,16 +1213,20 @@ static inline int destroy_queue(struct d
return 0;
}
-static int setup_pin_mux(int action)
+static int setup_pin_mux(int action, int bus_num)
{
- u16 pin_req[] = {P_SPI0_SCK, P_SPI0_MISO, P_SPI0_MOSI, 0};
+ u16 pin_req[3][4] = {
+ {P_SPI0_SCK, P_SPI0_MISO, P_SPI0_MOSI, 0},
+ {P_SPI1_SCK, P_SPI1_MISO, P_SPI1_MOSI, 0},
+ {P_SPI2_SCK, P_SPI2_MISO, P_SPI2_MOSI, 0},
+ };
if (action) {
- if (peripheral_request_list(pin_req, DRV_NAME))
+ if (peripheral_request_list(pin_req[bus_num], DRV_NAME))
return -EFAULT;
} else {
- peripheral_free_list(pin_req);
+ peripheral_free_list(pin_req[bus_num]);
}
return 0;
@@ -1239,11 +1250,6 @@ static int __init bfin5xx_spi_probe(stru
return -ENOMEM;
}
- if (setup_pin_mux(1)) {
- dev_err(&pdev->dev, ": Requesting Peripherals failed\n");
- goto out_error;
- }
-
drv_data = spi_master_get_devdata(master);
drv_data->master = master;
drv_data->master_info = platform_info;
@@ -1298,6 +1304,11 @@ static int __init bfin5xx_spi_probe(stru
goto out_error_queue_alloc;
}
+ if (setup_pin_mux(1, master->bus_num)) {
+ dev_err(&pdev->dev, ": Requesting Peripherals failed\n");
+ goto out_error;
+ }
+
dev_info(dev, "%s, Version %s, regs_base @ 0x%08x\n",
DRV_DESC, DRV_VERSION, spi_regs_base);
return status;
@@ -1340,7 +1351,7 @@ static int __devexit bfin5xx_spi_remove(
/* Disconnect from the SPI framework */
spi_unregister_master(drv_data->master);
- setup_pin_mux(0);
+ setup_pin_mux(0, drv_data->master->bus_num);
/* Prevent double remove */
platform_set_drvdata(pdev, NULL);
_
Patches currently in -mm which might be from sonic.zhang@xxxxxxxxxx are
origin.patch
spi-spi_bfin-uses-portmux-for-additional-busses.patch
spi-spi_bfin-rearrange-portmux-calls.patch
spi-spi_bfin-change-handling-of-communication-parameters.patch
spi-spi_bfin-relocate-spin-waits.patch
spi-spi_bfin-resequence-dma-start-stop.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
