The patch titled
Blackfin SPI driver: reconfigure speed_hz and bits_per_word in each spi transfer
has been removed from the -mm tree. Its filename was
blackfin-spi-driver-reconfigure-speed_hz-and-bits_per_word-in-each-spi-transfer.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: Blackfin SPI driver: reconfigure speed_hz and bits_per_word in each spi transfer
From: Bryan Wu <bryan.wu@xxxxxxxxxx>
- reconfigure SPI baud from speed_hz of each spi transfer
- according to spi_transfer.bits_per_word to reprogram register and setup
correct SPI operation handlers
Signed-off-by: Bryan Wu <bryan.wu@xxxxxxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi_bfin5xx.c | 52 +++++++++++++++++++++++++++++++-----
1 file changed, 45 insertions(+), 7 deletions(-)
diff -puN drivers/spi/spi_bfin5xx.c~blackfin-spi-driver-reconfigure-speed_hz-and-bits_per_word-in-each-spi-transfer drivers/spi/spi_bfin5xx.c
--- a/drivers/spi/spi_bfin5xx.c~blackfin-spi-driver-reconfigure-speed_hz-and-bits_per_word-in-each-spi-transfer
+++ a/drivers/spi/spi_bfin5xx.c
@@ -234,10 +234,8 @@ static int restore_state(struct driver_d
dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n");
/* Load the registers */
- write_BAUD(drv_data, chip->baud);
- chip->ctl_reg &= (~BIT_CTL_TIMOD);
- chip->ctl_reg |= (chip->width << 8);
write_CTRL(drv_data, chip->ctl_reg);
+ write_BAUD(drv_data, chip->baud);
bfin_spi_enable(drv_data);
cs_active(drv_data, chip);
@@ -679,6 +677,7 @@ 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
*/
@@ -736,15 +735,48 @@ static void pump_transfers(unsigned long
drv_data->len_in_bytes = transfer->len;
drv_data->cs_change = transfer->cs_change;
- width = chip->width;
+ /* Bits per word setup */
+ switch (transfer->bits_per_word) {
+ case 8:
+ drv_data->n_bytes = 1;
+ width = CFG_SPI_WORDSIZE8;
+ drv_data->read = chip->cs_change_per_word ?
+ u8_cs_chg_reader : u8_reader;
+ drv_data->write = chip->cs_change_per_word ?
+ u8_cs_chg_writer : u8_writer;
+ drv_data->duplex = chip->cs_change_per_word ?
+ u8_cs_chg_duplex : u8_duplex;
+ break;
+
+ case 16:
+ drv_data->n_bytes = 2;
+ width = CFG_SPI_WORDSIZE16;
+ drv_data->read = chip->cs_change_per_word ?
+ u16_cs_chg_reader : u16_reader;
+ drv_data->write = chip->cs_change_per_word ?
+ u16_cs_chg_writer : u16_writer;
+ drv_data->duplex = chip->cs_change_per_word ?
+ u16_cs_chg_duplex : u16_duplex;
+ break;
+
+ default:
+ /* No change, the same as default setting */
+ drv_data->n_bytes = chip->n_bytes;
+ width = chip->width;
+ drv_data->write = drv_data->tx ? chip->write : null_writer;
+ drv_data->read = drv_data->rx ? chip->read : null_reader;
+ drv_data->duplex = chip->duplex ? chip->duplex : null_writer;
+ break;
+ }
+ cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD));
+ cr |= (width << 8);
+ write_CTRL(drv_data, cr);
+
if (width == CFG_SPI_WORDSIZE16) {
drv_data->len = (transfer->len) >> 1;
} else {
drv_data->len = transfer->len;
}
- drv_data->write = drv_data->tx ? chip->write : null_writer;
- drv_data->read = drv_data->rx ? chip->read : null_reader;
- drv_data->duplex = chip->duplex ? chip->duplex : null_writer;
dev_dbg(&drv_data->pdev->dev, "transfer: ",
"drv_data->write is %p, chip->write is %p, null_wr is %p\n",
drv_data->write, chip->write, null_writer);
@@ -753,6 +785,12 @@ static void pump_transfers(unsigned long
message->state = RUNNING_STATE;
dma_config = 0;
+ /* Speed setup (surely valid because already checked) */
+ if (transfer->speed_hz)
+ write_BAUD(drv_data, hz_to_spi_baud(transfer->speed_hz));
+ else
+ write_BAUD(drv_data, chip->baud);
+
write_STAT(drv_data, BIT_STAT_CLR);
cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD));
cs_active(drv_data, chip);
_
Patches currently in -mm which might be from bryan.wu@xxxxxxxxxx are
origin.patch
git-mtd.patch
blackfin-serial-driver-this-driver-enable-sports-on-blackfin-emulate-uart.patch
kernel-printkc-concerns-about-the-console-handover.patch
remove-mm_ptovvtop.patch
blackfin-rtc-driver-the-frequency-function-is-in-units-of-hz-not-units-of-seconds-so-lock-our-driver-down-to-1-hz.patch
blackfin-rtc-driver-we-pass-in-a-struct-device-to-the-irq-handler-not-a-struct-platform_device-so-fix-the-irq-handler.patch
blackfin-rtc-driver-cleanup-proc-handler-we-dont-need-rtc-reg-dump-now-that-we-have-mmr-filesystem-in-sysfs.patch
blackfin-rtc-driver-use-dev_dbg-rather-than-pr_stamp.patch
blackfin-rtc-driver-read_alarm-checks-the-enabled-field-not-the-pending-field.patch
blackfin-rtc-driver-shave-off-another-memcpy-by-using-assignment.patch
blackfin-rtc-driver-convert-sync-wait-to-use-the-irq-write-complete-notice.patch
sanitize-the-type-of-struct-useru_ar0.patch
add-cmpxchg_local-to-blackfin-replace-__cmpxchg-by-generic-cmpxchg.patch
d_path-make-d_path-use-a-struct-path.patch
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