powerpc: mpc5200: fix build error on mpc52xx_psc_spi device driver

Commit id 94f38948 (Separate MPC52xx PSC FIOF
regsiters from the rest of PSC) split the PSC fifo registers away from the
core PSC regs.  Doing so broke the mpc52xx_psc_spi driver.

This patch teaches the mpc52xx_psc_spi driver about the new PSC fifo
register definitions.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Cc: David Brownell <david-b@pacbell.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@gate.crashing.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/spi/mpc52xx_psc_spi.c

@@ -42,6 +42,7 @@ struct mpc52xx_psc_spi {
 
 	/* driver internal data */
 	struct mpc52xx_psc __iomem *psc;
+	struct mpc52xx_psc_fifo __iomem *fifo;
 	unsigned int irq;
 	u8 bits_per_word;
 	u8 busy;
@@ -139,6 +140,7 @@ static int mpc52xx_psc_spi_transfer_rxtx(struct spi_device *spi,
 {
 	struct mpc52xx_psc_spi *mps = spi_master_get_devdata(spi->master);
 	struct mpc52xx_psc __iomem *psc = mps->psc;
+	struct mpc52xx_psc_fifo __iomem *fifo = mps->fifo;
 	unsigned rb = 0;	/* number of bytes receieved */
 	unsigned sb = 0;	/* number of bytes sent */
 	unsigned char *rx_buf = (unsigned char *)t->rx_buf;
@@ -190,11 +192,11 @@ static int mpc52xx_psc_spi_transfer_rxtx(struct spi_device *spi,
 			out_8(&psc->mode, 0);
 		} else {
 			out_8(&psc->mode, MPC52xx_PSC_MODE_FFULL);
-			out_be16(&psc->rfalarm, rfalarm);
+			out_be16(&fifo->rfalarm, rfalarm);
 		}
 		out_be16(&psc->mpc52xx_psc_imr, MPC52xx_PSC_IMR_RXRDY);
 		wait_for_completion(&mps->done);
-		recv_at_once = in_be16(&psc->rfnum);
+		recv_at_once = in_be16(&fifo->rfnum);
 		dev_dbg(&spi->dev, "%d bytes received\n", recv_at_once);
 
 		send_at_once = recv_at_once;
@@ -331,6 +333,7 @@ static void mpc52xx_psc_spi_cleanup(struct spi_device *spi)
 static int mpc52xx_psc_spi_port_config(int psc_id, struct mpc52xx_psc_spi *mps)
 {
 	struct mpc52xx_psc __iomem *psc = mps->psc;
+	struct mpc52xx_psc_fifo __iomem *fifo = mps->fifo;
 	u32 mclken_div;
 	int ret = 0;
 
@@ -346,7 +349,7 @@ static int mpc52xx_psc_spi_port_config(int psc_id, struct mpc52xx_psc_spi *mps)
 	/* Disable interrupts, interrupts are based on alarm level */
 	out_be16(&psc->mpc52xx_psc_imr, 0);
 	out_8(&psc->command, MPC52xx_PSC_SEL_MODE_REG_1);
-	out_8(&psc->rfcntl, 0);
+	out_8(&fifo->rfcntl, 0);
 	out_8(&psc->mode, MPC52xx_PSC_MODE_FFULL);
 
 	/* Configure 8bit codec mode as a SPI master and use EOF flags */
@@ -419,6 +422,8 @@ static int __init mpc52xx_psc_spi_do_probe(struct device *dev, u32 regaddr,
 		ret = -EFAULT;
 		goto free_master;
 	}
+	/* On the 5200, fifo regs are immediately ajacent to the psc regs */
+	mps->fifo = ((void __iomem *)mps->psc) + sizeof(struct mpc52xx_psc);
 
 	ret = request_irq(mps->irq, mpc52xx_psc_spi_isr, 0, "mpc52xx-psc-spi",
 				mps);