Merge tag 'soc-fsl-next-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/leo/linux into arm/drivers

NXP/FSL SoC driver updates for v5.6

QUICC Engine drivers
- Improve the QE drivers to be compatible with ARM/ARM64/PPC64
architectures
- Various cleanups to the QE drivers

* tag 'soc-fsl-next-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/leo/linux: (49 commits)
  soc: fsl: qe: remove set but not used variable 'mm_gc'
  soc: fsl: qe: remove PPC32 dependency from CONFIG_QUICC_ENGINE
  soc: fsl: qe: remove unused #include of asm/irq.h from ucc.c
  net: ethernet: freescale: make UCC_GETH explicitly depend on PPC32
  net/wan/fsl_ucc_hdlc: reject muram offsets above 64K
  net/wan/fsl_ucc_hdlc: fix reading of __be16 registers
  net/wan/fsl_ucc_hdlc: avoid use of IS_ERR_VALUE()
  soc: fsl: qe: avoid IS_ERR_VALUE in ucc_fast.c
  soc: fsl: qe: drop pointless check in qe_sdma_init()
  soc: fsl: qe: drop use of IS_ERR_VALUE in qe_sdma_init()
  soc: fsl: qe: avoid IS_ERR_VALUE in ucc_slow.c
  soc: fsl: qe: refactor cpm_muram_alloc_common to prevent BUG on error path
  soc: fsl: qe: drop broken lazy call of cpm_muram_init()
  soc: fsl: qe: make cpm_muram_free() ignore a negative offset
  soc: fsl: qe: make cpm_muram_free() return void
  soc: fsl: qe: change return type of cpm_muram_alloc() to s32
  serial: ucc_uart: access __be32 field using be32_to_cpu
  serial: ucc_uart: limit brg-frequency workaround to PPC32
  serial: ucc_uart: use of_property_read_u32() in ucc_uart_probe()
  serial: ucc_uart: stub out soft_uart_init for !CONFIG_PPC32
  ...

Link: https://lore.kernel.org/r/1578608351-23289-1-git-send-email-leoyang.li@nxp.com
Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 201 insertions, 184 deletions

diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c
index a0555ae2b1ef..afc2a5d69202 100644
--- a/drivers/tty/serial/ucc_uart.c
+++ b/drivers/tty/serial/ucc_uart.c
@@ -32,7 +32,11 @@
 #include <soc/fsl/qe/ucc_slow.h>
 
 #include <linux/firmware.h>
-#include <asm/reg.h>
+#include <soc/fsl/cpm.h>
+
+#ifdef CONFIG_PPC32
+#include <asm/reg.h> /* mfspr, SPRN_SVR */
+#endif
 
 /*
  * The GUMR flag for Soft UART.  This would normally be defined in qe.h,
@@ -257,11 +261,11 @@ static unsigned int qe_uart_tx_empty(struct uart_port *port)
 	struct qe_bd *bdp = qe_port->tx_bd_base;
 
 	while (1) {
-		if (in_be16(&bdp->status) & BD_SC_READY)
+		if (qe_ioread16be(&bdp->status) & BD_SC_READY)
 			/* This BD is not done, so return "not done" */
 			return 0;
 
-		if (in_be16(&bdp->status) & BD_SC_WRAP)
+		if (qe_ioread16be(&bdp->status) & BD_SC_WRAP)
 			/*
 			 * This BD is done and it's the last one, so return
 			 * "done"
@@ -307,7 +311,7 @@ static void qe_uart_stop_tx(struct uart_port *port)
 	struct uart_qe_port *qe_port =
 		container_of(port, struct uart_qe_port, port);
 
-	clrbits16(&qe_port->uccp->uccm, UCC_UART_UCCE_TX);
+	qe_clrbits_be16(&qe_port->uccp->uccm, UCC_UART_UCCE_TX);
 }
 
 /*
@@ -339,13 +343,13 @@ static int qe_uart_tx_pump(struct uart_qe_port *qe_port)
 		/* Pick next descriptor and fill from buffer */
 		bdp = qe_port->tx_cur;
 
-		p = qe2cpu_addr(bdp->buf, qe_port);
+		p = qe2cpu_addr(be32_to_cpu(bdp->buf), qe_port);
 
 		*p++ = port->x_char;
-		out_be16(&bdp->length, 1);
-		setbits16(&bdp->status, BD_SC_READY);
+		qe_iowrite16be(1, &bdp->length);
+		qe_setbits_be16(&bdp->status, BD_SC_READY);
 		/* Get next BD. */
-		if (in_be16(&bdp->status) & BD_SC_WRAP)
+		if (qe_ioread16be(&bdp->status) & BD_SC_WRAP)
 			bdp = qe_port->tx_bd_base;
 		else
 			bdp++;
@@ -364,10 +368,10 @@ static int qe_uart_tx_pump(struct uart_qe_port *qe_port)
 	/* Pick next descriptor and fill from buffer */
 	bdp = qe_port->tx_cur;
 
-	while (!(in_be16(&bdp->status) & BD_SC_READY) &&
+	while (!(qe_ioread16be(&bdp->status) & BD_SC_READY) &&
 	       (xmit->tail != xmit->head)) {
 		count = 0;
-		p = qe2cpu_addr(bdp->buf, qe_port);
+		p = qe2cpu_addr(be32_to_cpu(bdp->buf), qe_port);
 		while (count < qe_port->tx_fifosize) {
 			*p++ = xmit->buf[xmit->tail];
 			xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
@@ -377,11 +381,11 @@ static int qe_uart_tx_pump(struct uart_qe_port *qe_port)
 				break;
 		}
 
-		out_be16(&bdp->length, count);
-		setbits16(&bdp->status, BD_SC_READY);
+		qe_iowrite16be(count, &bdp->length);
+		qe_setbits_be16(&bdp->status, BD_SC_READY);
 
 		/* Get next BD. */
-		if (in_be16(&bdp->status) & BD_SC_WRAP)
+		if (qe_ioread16be(&bdp->status) & BD_SC_WRAP)
 			bdp = qe_port->tx_bd_base;
 		else
 			bdp++;
@@ -414,12 +418,12 @@ static void qe_uart_start_tx(struct uart_port *port)
 		container_of(port, struct uart_qe_port, port);
 
 	/* If we currently are transmitting, then just return */
-	if (in_be16(&qe_port->uccp->uccm) & UCC_UART_UCCE_TX)
+	if (qe_ioread16be(&qe_port->uccp->uccm) & UCC_UART_UCCE_TX)
 		return;
 
 	/* Otherwise, pump the port and start transmission */
 	if (qe_uart_tx_pump(qe_port))
-		setbits16(&qe_port->uccp->uccm, UCC_UART_UCCE_TX);
+		qe_setbits_be16(&qe_port->uccp->uccm, UCC_UART_UCCE_TX);
 }
 
 /*
@@ -430,7 +434,7 @@ static void qe_uart_stop_rx(struct uart_port *port)
 	struct uart_qe_port *qe_port =
 		container_of(port, struct uart_qe_port, port);
 
-	clrbits16(&qe_port->uccp->uccm, UCC_UART_UCCE_RX);
+	qe_clrbits_be16(&qe_port->uccp->uccm, UCC_UART_UCCE_RX);
 }
 
 /* Start or stop sending  break signal
@@ -469,14 +473,14 @@ static void qe_uart_int_rx(struct uart_qe_port *qe_port)
 	 */
 	bdp = qe_port->rx_cur;
 	while (1) {
-		status = in_be16(&bdp->status);
+		status = qe_ioread16be(&bdp->status);
 
 		/* If this one is empty, then we assume we've read them all */
 		if (status & BD_SC_EMPTY)
 			break;
 
 		/* get number of characters, and check space in RX buffer */
-		i = in_be16(&bdp->length);
+		i = qe_ioread16be(&bdp->length);
 
 		/* If we don't have enough room in RX buffer for the entire BD,
 		 * then we try later, which will be the next RX interrupt.
@@ -487,7 +491,7 @@ static void qe_uart_int_rx(struct uart_qe_port *qe_port)
 		}
 
 		/* get pointer */
-		cp = qe2cpu_addr(bdp->buf, qe_port);
+		cp = qe2cpu_addr(be32_to_cpu(bdp->buf), qe_port);
 
 		/* loop through the buffer */
 		while (i-- > 0) {
@@ -507,9 +511,10 @@ error_return:
 		}
 
 		/* This BD is ready to be used again. Clear status. get next */
-		clrsetbits_be16(&bdp->status, BD_SC_BR | BD_SC_FR | BD_SC_PR |
-			BD_SC_OV | BD_SC_ID, BD_SC_EMPTY);
-		if (in_be16(&bdp->status) & BD_SC_WRAP)
+		qe_clrsetbits_be16(&bdp->status,
+				   BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV | BD_SC_ID,
+				   BD_SC_EMPTY);
+		if (qe_ioread16be(&bdp->status) & BD_SC_WRAP)
 			bdp = qe_port->rx_bd_base;
 		else
 			bdp++;
@@ -568,8 +573,8 @@ static irqreturn_t qe_uart_int(int irq, void *data)
 	u16 events;
 
 	/* Clear the interrupts */
-	events = in_be16(&uccp->ucce);
-	out_be16(&uccp->ucce, events);
+	events = qe_ioread16be(&uccp->ucce);
+	qe_iowrite16be(events, &uccp->ucce);
 
 	if (events & UCC_UART_UCCE_BRKE)
 		uart_handle_break(&qe_port->port);
@@ -600,17 +605,17 @@ static void qe_uart_initbd(struct uart_qe_port *qe_port)
 	bdp = qe_port->rx_bd_base;
 	qe_port->rx_cur = qe_port->rx_bd_base;
 	for (i = 0; i < (qe_port->rx_nrfifos - 1); i++) {
-		out_be16(&bdp->status, BD_SC_EMPTY | BD_SC_INTRPT);
-		out_be32(&bdp->buf, cpu2qe_addr(bd_virt, qe_port));
-		out_be16(&bdp->length, 0);
+		qe_iowrite16be(BD_SC_EMPTY | BD_SC_INTRPT, &bdp->status);
+		qe_iowrite32be(cpu2qe_addr(bd_virt, qe_port), &bdp->buf);
+		qe_iowrite16be(0, &bdp->length);
 		bd_virt += qe_port->rx_fifosize;
 		bdp++;
 	}
 
 	/* */
-	out_be16(&bdp->status, BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT);
-	out_be32(&bdp->buf, cpu2qe_addr(bd_virt, qe_port));
-	out_be16(&bdp->length, 0);
+	qe_iowrite16be(BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT, &bdp->status);
+	qe_iowrite32be(cpu2qe_addr(bd_virt, qe_port), &bdp->buf);
+	qe_iowrite16be(0, &bdp->length);
 
 	/* Set the physical address of the host memory
 	 * buffers in the buffer descriptors, and the
@@ -621,21 +626,21 @@ static void qe_uart_initbd(struct uart_qe_port *qe_port)
 	qe_port->tx_cur = qe_port->tx_bd_base;
 	bdp = qe_port->tx_bd_base;
 	for (i = 0; i < (qe_port->tx_nrfifos - 1); i++) {
-		out_be16(&bdp->status, BD_SC_INTRPT);
-		out_be32(&bdp->buf, cpu2qe_addr(bd_virt, qe_port));
-		out_be16(&bdp->length, 0);
+		qe_iowrite16be(BD_SC_INTRPT, &bdp->status);
+		qe_iowrite32be(cpu2qe_addr(bd_virt, qe_port), &bdp->buf);
+		qe_iowrite16be(0, &bdp->length);
 		bd_virt += qe_port->tx_fifosize;
 		bdp++;
 	}
 
 	/* Loopback requires the preamble bit to be set on the first TX BD */
 #ifdef LOOPBACK
-	setbits16(&qe_port->tx_cur->status, BD_SC_P);
+	qe_setbits_be16(&qe_port->tx_cur->status, BD_SC_P);
 #endif
 
-	out_be16(&bdp->status, BD_SC_WRAP | BD_SC_INTRPT);
-	out_be32(&bdp->buf, cpu2qe_addr(bd_virt, qe_port));
-	out_be16(&bdp->length, 0);
+	qe_iowrite16be(BD_SC_WRAP | BD_SC_INTRPT, &bdp->status);
+	qe_iowrite32be(cpu2qe_addr(bd_virt, qe_port), &bdp->buf);
+	qe_iowrite16be(0, &bdp->length);
 }
 
 /*
@@ -657,78 +662,74 @@ static void qe_uart_init_ucc(struct uart_qe_port *qe_port)
 	ucc_slow_disable(qe_port->us_private, COMM_DIR_RX_AND_TX);
 
 	/* Program the UCC UART parameter RAM */
-	out_8(&uccup->common.rbmr, UCC_BMR_GBL | UCC_BMR_BO_BE);
-	out_8(&uccup->common.tbmr, UCC_BMR_GBL | UCC_BMR_BO_BE);
-	out_be16(&uccup->common.mrblr, qe_port->rx_fifosize);
-	out_be16(&uccup->maxidl, 0x10);
-	out_be16(&uccup->brkcr, 1);
-	out_be16(&uccup->parec, 0);
-	out_be16(&uccup->frmec, 0);
-	out_be16(&uccup->nosec, 0);
-	out_be16(&uccup->brkec, 0);
-	out_be16(&uccup->uaddr[0], 0);
-	out_be16(&uccup->uaddr[1], 0);
-	out_be16(&uccup->toseq, 0);
+	qe_iowrite8(UCC_BMR_GBL | UCC_BMR_BO_BE, &uccup->common.rbmr);
+	qe_iowrite8(UCC_BMR_GBL | UCC_BMR_BO_BE, &uccup->common.tbmr);
+	qe_iowrite16be(qe_port->rx_fifosize, &uccup->common.mrblr);
+	qe_iowrite16be(0x10, &uccup->maxidl);
+	qe_iowrite16be(1, &uccup->brkcr);
+	qe_iowrite16be(0, &uccup->parec);
+	qe_iowrite16be(0, &uccup->frmec);
+	qe_iowrite16be(0, &uccup->nosec);
+	qe_iowrite16be(0, &uccup->brkec);
+	qe_iowrite16be(0, &uccup->uaddr[0]);
+	qe_iowrite16be(0, &uccup->uaddr[1]);
+	qe_iowrite16be(0, &uccup->toseq);
 	for (i = 0; i < 8; i++)
-		out_be16(&uccup->cchars[i], 0xC000);
-	out_be16(&uccup->rccm, 0xc0ff);
+		qe_iowrite16be(0xC000, &uccup->cchars[i]);
+	qe_iowrite16be(0xc0ff, &uccup->rccm);
 
 	/* Configure the GUMR registers for UART */
 	if (soft_uart) {
 		/* Soft-UART requires a 1X multiplier for TX */
-		clrsetbits_be32(&uccp->gumr_l,
-			UCC_SLOW_GUMR_L_MODE_MASK | UCC_SLOW_GUMR_L_TDCR_MASK |
-			UCC_SLOW_GUMR_L_RDCR_MASK,
-			UCC_SLOW_GUMR_L_MODE_UART | UCC_SLOW_GUMR_L_TDCR_1 |
-			UCC_SLOW_GUMR_L_RDCR_16);
-
-		clrsetbits_be32(&uccp->gumr_h, UCC_SLOW_GUMR_H_RFW,
-			UCC_SLOW_GUMR_H_TRX | UCC_SLOW_GUMR_H_TTX);
+		qe_clrsetbits_be32(&uccp->gumr_l,
+				   UCC_SLOW_GUMR_L_MODE_MASK | UCC_SLOW_GUMR_L_TDCR_MASK | UCC_SLOW_GUMR_L_RDCR_MASK,
+				   UCC_SLOW_GUMR_L_MODE_UART | UCC_SLOW_GUMR_L_TDCR_1 | UCC_SLOW_GUMR_L_RDCR_16);
+
+		qe_clrsetbits_be32(&uccp->gumr_h, UCC_SLOW_GUMR_H_RFW,
+				   UCC_SLOW_GUMR_H_TRX | UCC_SLOW_GUMR_H_TTX);
 	} else {
-		clrsetbits_be32(&uccp->gumr_l,
-			UCC_SLOW_GUMR_L_MODE_MASK | UCC_SLOW_GUMR_L_TDCR_MASK |
-			UCC_SLOW_GUMR_L_RDCR_MASK,
-			UCC_SLOW_GUMR_L_MODE_UART | UCC_SLOW_GUMR_L_TDCR_16 |
-			UCC_SLOW_GUMR_L_RDCR_16);
-
-		clrsetbits_be32(&uccp->gumr_h,
-			UCC_SLOW_GUMR_H_TRX | UCC_SLOW_GUMR_H_TTX,
-			UCC_SLOW_GUMR_H_RFW);
+		qe_clrsetbits_be32(&uccp->gumr_l,
+				   UCC_SLOW_GUMR_L_MODE_MASK | UCC_SLOW_GUMR_L_TDCR_MASK | UCC_SLOW_GUMR_L_RDCR_MASK,
+				   UCC_SLOW_GUMR_L_MODE_UART | UCC_SLOW_GUMR_L_TDCR_16 | UCC_SLOW_GUMR_L_RDCR_16);
+
+		qe_clrsetbits_be32(&uccp->gumr_h,
+				   UCC_SLOW_GUMR_H_TRX | UCC_SLOW_GUMR_H_TTX,
+				   UCC_SLOW_GUMR_H_RFW);
 	}
 
 #ifdef LOOPBACK
-	clrsetbits_be32(&uccp->gumr_l, UCC_SLOW_GUMR_L_DIAG_MASK,
-		UCC_SLOW_GUMR_L_DIAG_LOOP);
-	clrsetbits_be32(&uccp->gumr_h,
-		UCC_SLOW_GUMR_H_CTSP | UCC_SLOW_GUMR_H_RSYN,
-		UCC_SLOW_GUMR_H_CDS);
+	qe_clrsetbits_be32(&uccp->gumr_l, UCC_SLOW_GUMR_L_DIAG_MASK,
+			   UCC_SLOW_GUMR_L_DIAG_LOOP);
+	qe_clrsetbits_be32(&uccp->gumr_h,
+			   UCC_SLOW_GUMR_H_CTSP | UCC_SLOW_GUMR_H_RSYN,
+			   UCC_SLOW_GUMR_H_CDS);
 #endif
 
 	/* Disable rx interrupts  and clear all pending events.  */
-	out_be16(&uccp->uccm, 0);
-	out_be16(&uccp->ucce, 0xffff);
-	out_be16(&uccp->udsr, 0x7e7e);
+	qe_iowrite16be(0, &uccp->uccm);
+	qe_iowrite16be(0xffff, &uccp->ucce);
+	qe_iowrite16be(0x7e7e, &uccp->udsr);
 
 	/* Initialize UPSMR */
-	out_be16(&uccp->upsmr, 0);
+	qe_iowrite16be(0, &uccp->upsmr);
 
 	if (soft_uart) {
-		out_be16(&uccup->supsmr, 0x30);
-		out_be16(&uccup->res92, 0);
-		out_be32(&uccup->rx_state, 0);
-		out_be32(&uccup->rx_cnt, 0);
-		out_8(&uccup->rx_bitmark, 0);
-		out_8(&uccup->rx_length, 10);
-		out_be32(&uccup->dump_ptr, 0x4000);
-		out_8(&uccup->rx_temp_dlst_qe, 0);
-		out_be32(&uccup->rx_frame_rem, 0);
-		out_8(&uccup->rx_frame_rem_size, 0);
+		qe_iowrite16be(0x30, &uccup->supsmr);
+		qe_iowrite16be(0, &uccup->res92);
+		qe_iowrite32be(0, &uccup->rx_state);
+		qe_iowrite32be(0, &uccup->rx_cnt);
+		qe_iowrite8(0, &uccup->rx_bitmark);
+		qe_iowrite8(10, &uccup->rx_length);
+		qe_iowrite32be(0x4000, &uccup->dump_ptr);
+		qe_iowrite8(0, &uccup->rx_temp_dlst_qe);
+		qe_iowrite32be(0, &uccup->rx_frame_rem);
+		qe_iowrite8(0, &uccup->rx_frame_rem_size);
 		/* Soft-UART requires TX to be 1X */
-		out_8(&uccup->tx_mode,
-			UCC_UART_TX_STATE_UART | UCC_UART_TX_STATE_X1);
-		out_be16(&uccup->tx_state, 0);
-		out_8(&uccup->resD4, 0);
-		out_be16(&uccup->resD5, 0);
+		qe_iowrite8(UCC_UART_TX_STATE_UART | UCC_UART_TX_STATE_X1,
+			    &uccup->tx_mode);
+		qe_iowrite16be(0, &uccup->tx_state);
+		qe_iowrite8(0, &uccup->resD4);
+		qe_iowrite16be(0, &uccup->resD5);
 
 		/* Set UART mode.
 		 * Enable receive and transmit.
@@ -742,22 +743,19 @@ static void qe_uart_init_ucc(struct uart_qe_port *qe_port)
 		 * ...
 		 * 6.Receiver must use 16x over sampling
 		 */
-		clrsetbits_be32(&uccp->gumr_l,
-			UCC_SLOW_GUMR_L_MODE_MASK | UCC_SLOW_GUMR_L_TDCR_MASK |
-			UCC_SLOW_GUMR_L_RDCR_MASK,
-			UCC_SLOW_GUMR_L_MODE_QMC | UCC_SLOW_GUMR_L_TDCR_16 |
-			UCC_SLOW_GUMR_L_RDCR_16);
+		qe_clrsetbits_be32(&uccp->gumr_l,
+				   UCC_SLOW_GUMR_L_MODE_MASK | UCC_SLOW_GUMR_L_TDCR_MASK | UCC_SLOW_GUMR_L_RDCR_MASK,
+				   UCC_SLOW_GUMR_L_MODE_QMC | UCC_SLOW_GUMR_L_TDCR_16 | UCC_SLOW_GUMR_L_RDCR_16);
 
-		clrsetbits_be32(&uccp->gumr_h,
-			UCC_SLOW_GUMR_H_RFW | UCC_SLOW_GUMR_H_RSYN,
-			UCC_SLOW_GUMR_H_SUART | UCC_SLOW_GUMR_H_TRX |
-			UCC_SLOW_GUMR_H_TTX | UCC_SLOW_GUMR_H_TFL);
+		qe_clrsetbits_be32(&uccp->gumr_h,
+				   UCC_SLOW_GUMR_H_RFW | UCC_SLOW_GUMR_H_RSYN,
+				   UCC_SLOW_GUMR_H_SUART | UCC_SLOW_GUMR_H_TRX | UCC_SLOW_GUMR_H_TTX | UCC_SLOW_GUMR_H_TFL);
 
 #ifdef LOOPBACK
-		clrsetbits_be32(&uccp->gumr_l, UCC_SLOW_GUMR_L_DIAG_MASK,
-				UCC_SLOW_GUMR_L_DIAG_LOOP);
-		clrbits32(&uccp->gumr_h, UCC_SLOW_GUMR_H_CTSP |
-			  UCC_SLOW_GUMR_H_CDS);
+		qe_clrsetbits_be32(&uccp->gumr_l, UCC_SLOW_GUMR_L_DIAG_MASK,
+				   UCC_SLOW_GUMR_L_DIAG_LOOP);
+		qe_clrbits_be32(&uccp->gumr_h,
+				UCC_SLOW_GUMR_H_CTSP | UCC_SLOW_GUMR_H_CDS);
 #endif
 
 		cecr_subblock = ucc_slow_get_qe_cr_subblock(qe_port->ucc_num);
@@ -800,7 +798,7 @@ static int qe_uart_startup(struct uart_port *port)
 	}
 
 	/* Startup rx-int */
-	setbits16(&qe_port->uccp->uccm, UCC_UART_UCCE_RX);
+	qe_setbits_be16(&qe_port->uccp->uccm, UCC_UART_UCCE_RX);
 	ucc_slow_enable(qe_port->us_private, COMM_DIR_RX_AND_TX);
 
 	return 0;
@@ -836,7 +834,7 @@ static void qe_uart_shutdown(struct uart_port *port)
 
 	/* Stop uarts */
 	ucc_slow_disable(qe_port->us_private, COMM_DIR_RX_AND_TX);
-	clrbits16(&uccp->uccm, UCC_UART_UCCE_TX | UCC_UART_UCCE_RX);
+	qe_clrbits_be16(&uccp->uccm, UCC_UART_UCCE_TX | UCC_UART_UCCE_RX);
 
 	/* Shut them really down and reinit buffer descriptors */
 	ucc_slow_graceful_stop_tx(qe_port->us_private);
@@ -856,9 +854,9 @@ static void qe_uart_set_termios(struct uart_port *port,
 	struct ucc_slow __iomem *uccp = qe_port->uccp;
 	unsigned int baud;
 	unsigned long flags;
-	u16 upsmr = in_be16(&uccp->upsmr);
+	u16 upsmr = qe_ioread16be(&uccp->upsmr);
 	struct ucc_uart_pram __iomem *uccup = qe_port->uccup;
-	u16 supsmr = in_be16(&uccup->supsmr);
+	u16 supsmr = qe_ioread16be(&uccup->supsmr);
 	u8 char_length = 2; /* 1 + CL + PEN + 1 + SL */
 
 	/* Character length programmed into the mode register is the
@@ -956,10 +954,10 @@ static void qe_uart_set_termios(struct uart_port *port,
 	/* Update the per-port timeout. */
 	uart_update_timeout(port, termios->c_cflag, baud);
 
-	out_be16(&uccp->upsmr, upsmr);
+	qe_iowrite16be(upsmr, &uccp->upsmr);
 	if (soft_uart) {
-		out_be16(&uccup->supsmr, supsmr);
-		out_8(&uccup->rx_length, char_length);
+		qe_iowrite16be(supsmr, &uccup->supsmr);
+		qe_iowrite8(char_length, &uccup->rx_length);
 
 		/* Soft-UART requires a 1X multiplier for TX */
 		qe_setbrg(qe_port->us_info.rx_clock, baud, 16);
@@ -1101,6 +1099,8 @@ static const struct uart_ops qe_uart_pops = {
 	.verify_port    = qe_uart_verify_port,
 };
 
+
+#ifdef CONFIG_PPC32
 /*
  * Obtain the SOC model number and revision level
  *
@@ -1188,70 +1188,86 @@ static void uart_firmware_cont(const struct firmware *fw, void *context)
 	release_firmware(fw);
 }
 
-static int ucc_uart_probe(struct platform_device *ofdev)
+static int soft_uart_init(struct platform_device *ofdev)
 {
 	struct device_node *np = ofdev->dev.of_node;
-	const unsigned int *iprop;      /* Integer OF properties */
-	const char *sprop;      /* String OF properties */
-	struct uart_qe_port *qe_port = NULL;
-	struct resource res;
+	struct qe_firmware_info *qe_fw_info;
 	int ret;
 
-	/*
-	 * Determine if we need Soft-UART mode
-	 */
 	if (of_find_property(np, "soft-uart", NULL)) {
 		dev_dbg(&ofdev->dev, "using Soft-UART mode\n");
 		soft_uart = 1;
+	} else {
+		return 0;
 	}
 
-	/*
-	 * If we are using Soft-UART, determine if we need to upload the
-	 * firmware, too.
-	 */
-	if (soft_uart) {
-		struct qe_firmware_info *qe_fw_info;
-
-		qe_fw_info = qe_get_firmware_info();
-
-		/* Check if the firmware has been uploaded. */
-		if (qe_fw_info && strstr(qe_fw_info->id, "Soft-UART")) {
-			firmware_loaded = 1;
-		} else {
-			char filename[32];
-			unsigned int soc;
-			unsigned int rev_h;
-			unsigned int rev_l;
-
-			soc = soc_info(&rev_h, &rev_l);
-			if (!soc) {
-				dev_err(&ofdev->dev, "unknown CPU model\n");
-				return -ENXIO;
-			}
-			sprintf(filename, "fsl_qe_ucode_uart_%u_%u%u.bin",
-				soc, rev_h, rev_l);
-
-			dev_info(&ofdev->dev, "waiting for firmware %s\n",
-				filename);
+	qe_fw_info = qe_get_firmware_info();
 
-			/*
-			 * We call request_firmware_nowait instead of
-			 * request_firmware so that the driver can load and
-			 * initialize the ports without holding up the rest of
-			 * the kernel.  If hotplug support is enabled in the
-			 * kernel, then we use it.
-			 */
-			ret = request_firmware_nowait(THIS_MODULE,
-				FW_ACTION_HOTPLUG, filename, &ofdev->dev,
-				GFP_KERNEL, &ofdev->dev, uart_firmware_cont);
-			if (ret) {
-				dev_err(&ofdev->dev,
-					"could not load firmware %s\n",
-					filename);
-				return ret;
-			}
+	/* Check if the firmware has been uploaded. */
+	if (qe_fw_info && strstr(qe_fw_info->id, "Soft-UART")) {
+		firmware_loaded = 1;
+	} else {
+		char filename[32];
+		unsigned int soc;
+		unsigned int rev_h;
+		unsigned int rev_l;
+
+		soc = soc_info(&rev_h, &rev_l);
+		if (!soc) {
+			dev_err(&ofdev->dev, "unknown CPU model\n");
+			return -ENXIO;
+		}
+		sprintf(filename, "fsl_qe_ucode_uart_%u_%u%u.bin",
+			soc, rev_h, rev_l);
+
+		dev_info(&ofdev->dev, "waiting for firmware %s\n",
+			 filename);
+
+		/*
+		 * We call request_firmware_nowait instead of
+		 * request_firmware so that the driver can load and
+		 * initialize the ports without holding up the rest of
+		 * the kernel.  If hotplug support is enabled in the
+		 * kernel, then we use it.
+		 */
+		ret = request_firmware_nowait(THIS_MODULE,
+					      FW_ACTION_HOTPLUG, filename, &ofdev->dev,
+					      GFP_KERNEL, &ofdev->dev, uart_firmware_cont);
+		if (ret) {
+			dev_err(&ofdev->dev,
+				"could not load firmware %s\n",
+				filename);
+			return ret;
 		}
 	}
+	return 0;
+}
+
+#else /* !CONFIG_PPC32 */
+
+static int soft_uart_init(struct platform_device *ofdev)
+{
+	return 0;
+}
+
+#endif
+
+
+static int ucc_uart_probe(struct platform_device *ofdev)
+{
+	struct device_node *np = ofdev->dev.of_node;
+	const char *sprop;      /* String OF properties */
+	struct uart_qe_port *qe_port = NULL;
+	struct resource res;
+	u32 val;
+	int ret;
+
+	/*
+	 * Determine if we need Soft-UART mode
+	 */
+	ret = soft_uart_init(ofdev);
+	if (ret)
+		return ret;
 
 	qe_port = kzalloc(sizeof(struct uart_qe_port), GFP_KERNEL);
 	if (!qe_port) {
@@ -1274,23 +1290,20 @@ static int ucc_uart_probe(struct platform_device *ofdev)
 
 	/* Get the UCC number (device ID) */
 	/* UCCs are numbered 1-7 */
-	iprop = of_get_property(np, "cell-index", NULL);
-	if (!iprop) {
-		iprop = of_get_property(np, "device-id", NULL);
-		if (!iprop) {
-			dev_err(&ofdev->dev, "UCC is unspecified in "
-				"device tree\n");
+	if (of_property_read_u32(np, "cell-index", &val)) {
+		if (of_property_read_u32(np, "device-id", &val)) {
+			dev_err(&ofdev->dev, "UCC is unspecified in device tree\n");
 			ret = -EINVAL;
 			goto out_free;
 		}
 	}
 
-	if ((*iprop < 1) || (*iprop > UCC_MAX_NUM)) {
-		dev_err(&ofdev->dev, "no support for UCC%u\n", *iprop);
+	if (val < 1 || val > UCC_MAX_NUM) {
+		dev_err(&ofdev->dev, "no support for UCC%u\n", val);
 		ret = -ENODEV;
 		goto out_free;
 	}
-	qe_port->ucc_num = *iprop - 1;
+	qe_port->ucc_num = val - 1;
 
 	/*
 	 * In the future, we should not require the BRG to be specified in the
@@ -1334,13 +1347,12 @@ static int ucc_uart_probe(struct platform_device *ofdev)
 	}
 
 	/* Get the port number, numbered 0-3 */
-	iprop = of_get_property(np, "port-number", NULL);
-	if (!iprop) {
+	if (of_property_read_u32(np, "port-number", &val)) {
 		dev_err(&ofdev->dev, "missing port-number in device tree\n");
 		ret = -EINVAL;
 		goto out_free;
 	}
-	qe_port->port.line = *iprop;
+	qe_port->port.line = val;
 	if (qe_port->port.line >= UCC_MAX_UART) {
 		dev_err(&ofdev->dev, "port-number must be 0-%u\n",
 			UCC_MAX_UART - 1);
@@ -1370,31 +1382,36 @@ static int ucc_uart_probe(struct platform_device *ofdev)
 		}
 	}
 
-	iprop = of_get_property(np, "brg-frequency", NULL);
-	if (!iprop) {
+	if (of_property_read_u32(np, "brg-frequency", &val)) {
 		dev_err(&ofdev->dev,
 		       "missing brg-frequency in device tree\n");
 		ret = -EINVAL;
 		goto out_np;
 	}
 
-	if (*iprop)
-		qe_port->port.uartclk = *iprop;
+	if (val)
+		qe_port->port.uartclk = val;
 	else {
+		if (!IS_ENABLED(CONFIG_PPC32)) {
+			dev_err(&ofdev->dev,
+				"invalid brg-frequency in device tree\n");
+			ret = -EINVAL;
+			goto out_np;
+		}
+
 		/*
 		 * Older versions of U-Boot do not initialize the brg-frequency
 		 * property, so in this case we assume the BRG frequency is
 		 * half the QE bus frequency.
 		 */
-		iprop = of_get_property(np, "bus-frequency", NULL);
-		if (!iprop) {
+		if (of_property_read_u32(np, "bus-frequency", &val)) {
 			dev_err(&ofdev->dev,
 				"missing QE bus-frequency in device tree\n");
 			ret = -EINVAL;
 			goto out_np;
 		}
-		if (*iprop)
-			qe_port->port.uartclk = *iprop / 2;
+		if (val)
+			qe_port->port.uartclk = val / 2;
 		else {
 			dev_err(&ofdev->dev,
 				"invalid QE bus-frequency in device tree\n");