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yaml
---
r: 63857
b: refs/heads/master
c: e24a4d1
h: refs/heads/master
i:
  63855: 5dd038c
v: v3
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Anton Vorontsov authored and Linus Torvalds committed Aug 11, 2007
1 parent d77a1c5 commit 4dc78ba
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Showing 2 changed files with 14 additions and 9 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 8dfe9c21a890e0c1214b85d3d90a84187638bf5b
refs/heads/master: e24a4d1ee337e3a67a502f3f19cdec3ffc45ad05
21 changes: 13 additions & 8 deletions trunk/drivers/spi/spi_mpc83xx.c
Original file line number Diff line number Diff line change
Expand Up @@ -86,7 +86,7 @@ struct mpc83xx_spi {

unsigned nsecs; /* (clock cycle time)/2 */

u32 sysclk;
u32 spibrg; /* SPIBRG input clock */
u32 rx_shift; /* RX data reg shift when in qe mode */
u32 tx_shift; /* TX data reg shift when in qe mode */

Expand Down Expand Up @@ -169,17 +169,18 @@ static void mpc83xx_spi_chipselect(struct spi_device *spi, int value)

regval |= SPMODE_LEN(len);

if ((mpc83xx_spi->sysclk / spi->max_speed_hz) >= 64) {
u8 pm = mpc83xx_spi->sysclk / (spi->max_speed_hz * 64);
if ((mpc83xx_spi->spibrg / spi->max_speed_hz) >= 64) {
u8 pm = mpc83xx_spi->spibrg / (spi->max_speed_hz * 64);
if (pm > 0x0f) {
printk(KERN_WARNING "MPC83xx SPI: SPICLK can't be less then a SYSCLK/1024!\n"
"Requested SPICLK is %d Hz. Will use %d Hz instead.\n",
spi->max_speed_hz, mpc83xx_spi->sysclk / 1024);
dev_err(&spi->dev, "Requested speed is too "
"low: %d Hz. Will use %d Hz instead.\n",
spi->max_speed_hz,
mpc83xx_spi->spibrg / 1024);
pm = 0x0f;
}
regval |= SPMODE_PM(pm) | SPMODE_DIV16;
} else {
u8 pm = mpc83xx_spi->sysclk / (spi->max_speed_hz * 4);
u8 pm = mpc83xx_spi->spibrg / (spi->max_speed_hz * 4);
regval |= SPMODE_PM(pm);
}

Expand Down Expand Up @@ -429,13 +430,17 @@ static int __init mpc83xx_spi_probe(struct platform_device *dev)
mpc83xx_spi->bitbang.chipselect = mpc83xx_spi_chipselect;
mpc83xx_spi->bitbang.setup_transfer = mpc83xx_spi_setup_transfer;
mpc83xx_spi->bitbang.txrx_bufs = mpc83xx_spi_bufs;
mpc83xx_spi->sysclk = pdata->sysclk;
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;

if (mpc83xx_spi->qe_mode)
mpc83xx_spi->spibrg = pdata->sysclk / 2;
else
mpc83xx_spi->spibrg = pdata->sysclk;

mpc83xx_spi->rx_shift = 0;
mpc83xx_spi->tx_shift = 0;
if (mpc83xx_spi->qe_mode) {
Expand Down

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