mpc8xxx: LCRR[CLKDIV] is sometimes five bits

On newer CPUs, 8536, 8572, and 8610, the CLKDIV field of LCRR is five bits
instead of four.

In order to avoid an ifdef, LCRR_CLKDIV is set to 0x1f on all systems.  It
should be safe as the fifth bit was defined as reserved and set to 0.

Code that was using a hard coded 0x0f is changed to use LCRR_CLKDIV.

Signed-off-by: Trent Piepho <tpiepho@freescale.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Jon Loeliger <jdl@freescale.com>

15 files changed, 18 insertions, 15 deletions

diff --git a/board/freescale/mpc8540ads/mpc8540ads.c b/board/freescale/mpc8540ads/mpc8540ads.c
index a0b6fbd121..9e3f67768c 100644
--- a/board/freescale/mpc8540ads/mpc8540ads.c
+++ b/board/freescale/mpc8540ads/mpc8540ads.c
@@ -133,7 +133,7 @@ local_bus_init(void)
 	 */
 
 	get_sys_info(&sysinfo);
-	clkdiv = lbc->lcrr & 0x0f;
+	clkdiv = lbc->lcrr & LCRR_CLKDIV;
 	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	if (lbc_hz < 66) {
diff --git a/board/freescale/mpc8541cds/mpc8541cds.c b/board/freescale/mpc8541cds/mpc8541cds.c
index 7e40c5c80a..e6025c8a56 100644
--- a/board/freescale/mpc8541cds/mpc8541cds.c
+++ b/board/freescale/mpc8541cds/mpc8541cds.c
@@ -308,7 +308,7 @@ local_bus_init(void)
 	 */
 
 	get_sys_info(&sysinfo);
-	clkdiv = lbc->lcrr & 0x0f;
+	clkdiv = lbc->lcrr & LCRR_CLKDIV;
 	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	if (lbc_hz < 66) {
diff --git a/board/freescale/mpc8548cds/mpc8548cds.c b/board/freescale/mpc8548cds/mpc8548cds.c
index c562fc9d95..90e89bc719 100644
--- a/board/freescale/mpc8548cds/mpc8548cds.c
+++ b/board/freescale/mpc8548cds/mpc8548cds.c
@@ -125,7 +125,7 @@ local_bus_init(void)
 	sys_info_t sysinfo;
 
 	get_sys_info(&sysinfo);
-	clkdiv = (lbc->lcrr & 0x0f) * 2;
+	clkdiv = (lbc->lcrr & LCRR_CLKDIV) * 2;
 	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	gur->lbiuiplldcr1 = 0x00078080;
diff --git a/board/freescale/mpc8555cds/mpc8555cds.c b/board/freescale/mpc8555cds/mpc8555cds.c
index 33685c19f3..53d5a936af 100644
--- a/board/freescale/mpc8555cds/mpc8555cds.c
+++ b/board/freescale/mpc8555cds/mpc8555cds.c
@@ -308,7 +308,7 @@ local_bus_init(void)
 	 */
 
 	get_sys_info(&sysinfo);
-	clkdiv = lbc->lcrr & 0x0f;
+	clkdiv = lbc->lcrr & LCRR_CLKDIV;
 	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	if (lbc_hz < 66) {
diff --git a/board/freescale/mpc8560ads/mpc8560ads.c b/board/freescale/mpc8560ads/mpc8560ads.c
index 37308189d2..ac7778e25c 100644
--- a/board/freescale/mpc8560ads/mpc8560ads.c
+++ b/board/freescale/mpc8560ads/mpc8560ads.c
@@ -337,7 +337,7 @@ local_bus_init(void)
 	 */
 
 	get_sys_info(&sysinfo);
-	clkdiv = lbc->lcrr & 0x0f;
+	clkdiv = lbc->lcrr & LCRR_CLKDIV;
 	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	if (lbc_hz < 66) {
diff --git a/board/freescale/mpc8568mds/mpc8568mds.c b/board/freescale/mpc8568mds/mpc8568mds.c
index bc93be80fc..7a23b338a5 100644
--- a/board/freescale/mpc8568mds/mpc8568mds.c
+++ b/board/freescale/mpc8568mds/mpc8568mds.c
@@ -188,7 +188,7 @@ local_bus_init(void)
 	sys_info_t sysinfo;
 
 	get_sys_info(&sysinfo);
-	clkdiv = (lbc->lcrr & 0x0f) * 2;
+	clkdiv = (lbc->lcrr & LCRR_CLKDIV) * 2;
 	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	gur->lbiuiplldcr1 = 0x00078080;
diff --git a/board/mpc8540eval/mpc8540eval.c b/board/mpc8540eval/mpc8540eval.c
index fa0a336866..bf270f4ce6 100644
--- a/board/mpc8540eval/mpc8540eval.c
+++ b/board/mpc8540eval/mpc8540eval.c
@@ -101,7 +101,7 @@ phys_size_t initdram (int board_type)
 #if !defined(CONFIG_RAM_AS_FLASH) /* LocalBus is not emulating flash */
 	get_sys_info(&sysinfo);
 	/* if localbus freq is less than 66MHz,we use bypass mode,otherwise use DLL */
-	if(sysinfo.freqSystemBus/(CONFIG_SYS_LBC_LCRR & 0x0f) < 66000000) {
+	if(sysinfo.freqSystemBus/(CONFIG_SYS_LBC_LCRR & LCRR_CLKDIV) < 66000000) {
 		lbc->lcrr = (CONFIG_SYS_LBC_LCRR & 0x0fffffff)| 0x80000000;
 	} else {
 		lbc->lcrr = CONFIG_SYS_LBC_LCRR & 0x7fffffff;
diff --git a/board/pm854/pm854.c b/board/pm854/pm854.c
index fed0ed4318..5353d738b4 100644
--- a/board/pm854/pm854.c
+++ b/board/pm854/pm854.c
@@ -150,7 +150,7 @@ local_bus_init(void)
 	 */
 
 	get_sys_info(&sysinfo);
-	clkdiv = lbc->lcrr & 0x0f;
+	clkdiv = lbc->lcrr & LCRR_CLKDIV;
 	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	if (lbc_hz < 66) {
diff --git a/board/pm856/pm856.c b/board/pm856/pm856.c
index 932f1121e8..b14a3d34b1 100644
--- a/board/pm856/pm856.c
+++ b/board/pm856/pm856.c
@@ -306,7 +306,7 @@ local_bus_init(void)
 	 */
 
 	get_sys_info(&sysinfo);
-	clkdiv = lbc->lcrr & 0x0f;
+	clkdiv = lbc->lcrr & LCRR_CLKDIV;
 	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	if (lbc_hz < 66) {
diff --git a/board/sbc8548/sbc8548.c b/board/sbc8548/sbc8548.c
index 8c073cb4bb..519b0f749d 100644
--- a/board/sbc8548/sbc8548.c
+++ b/board/sbc8548/sbc8548.c
@@ -126,7 +126,7 @@ local_bus_init(void)
 	sys_info_t sysinfo;
 
 	get_sys_info(&sysinfo);
-	clkdiv = (lbc->lcrr & 0x0f) * 2;
+	clkdiv = (lbc->lcrr & LCRR_CLKDIV) * 2;
 	lbc_hz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	gur->lbiuiplldcr1 = 0x00078080;
diff --git a/board/socrates/socrates.c b/board/socrates/socrates.c
index d83dc7d6a3..df9696e69a 100644
--- a/board/socrates/socrates.c
+++ b/board/socrates/socrates.c
@@ -156,7 +156,7 @@ void local_bus_init (void)
 	uint lcrr = CONFIG_SYS_LBC_LCRR;
 
 	get_sys_info (&sysinfo);
-	clkdiv = lbc->lcrr & 0x0f;
+	clkdiv = lbc->lcrr & LCRR_CLKDIV;
 	lbc_mhz = sysinfo.freqSystemBus / 1000000 / clkdiv;
 
 	/* Disable PLL bypass for Local Bus Clock >= 66 MHz */
diff --git a/board/tqc/tqm85xx/tqm85xx.c b/board/tqc/tqm85xx/tqm85xx.c
index 73f1d01bdf..cda8208eec 100644
--- a/board/tqc/tqm85xx/tqm85xx.c
+++ b/board/tqc/tqm85xx/tqm85xx.c
@@ -361,7 +361,7 @@ uint get_lbc_clock (void)
 {
 	volatile ccsr_lbc_t *lbc = (void *)(CONFIG_SYS_MPC85xx_LBC_ADDR);
 	sys_info_t sys_info;
-	ulong clkdiv = lbc->lcrr & 0x0f;
+	ulong clkdiv = lbc->lcrr & LCRR_CLKDIV;
 
 	get_sys_info (&sys_info);
 
diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c
index 943602f923..59a9ac8d92 100644
--- a/cpu/mpc85xx/cpu.c
+++ b/cpu/mpc85xx/cpu.c
@@ -174,7 +174,7 @@ int checkcpu (void)
 	    lcrr = lbc->lcrr;
 	}
 #endif
-	clkdiv = lcrr & 0x0f;
+	clkdiv = lcrr & LCRR_CLKDIV;
 	if (clkdiv == 2 || clkdiv == 4 || clkdiv == 8) {
 #if defined(CONFIG_MPC8548) || defined(CONFIG_MPC8544) || \
     defined(CONFIG_MPC8572) || defined(CONFIG_MPC8536)
diff --git a/cpu/mpc86xx/cpu.c b/cpu/mpc86xx/cpu.c
index 4cace984d9..0ff76e3f7e 100644
--- a/cpu/mpc86xx/cpu.c
+++ b/cpu/mpc86xx/cpu.c
@@ -110,7 +110,7 @@ checkcpu(void)
 		lcrr = lbc->lcrr;
 	}
 #endif
-	clkdiv = lcrr & 0x0f;
+	clkdiv = lcrr & LCRR_CLKDIV;
 	if (clkdiv == 2 || clkdiv == 4 || clkdiv == 8) {
 		printf("LBC:%4lu MHz\n",
 		       sysinfo.freqSystemBus / 1000000 / clkdiv);
diff --git a/include/asm-ppc/fsl_lbc.h b/include/asm-ppc/fsl_lbc.h
index 51fc5c13b0..e492c62a8b 100644
--- a/include/asm-ppc/fsl_lbc.h
+++ b/include/asm-ppc/fsl_lbc.h
@@ -300,7 +300,10 @@
 #define LCRR_EADC_2			0x00020000
 #define LCRR_EADC_3			0x00030000
 #define LCRR_EADC_4			0x00000000
-#define LCRR_CLKDIV			0x0000000F
+/* CLKDIV is five bits only on 8536, 8572, and 8610, so far, but the fifth bit
+ * should always be zero on older parts that have a four bit CLKDIV.
+ */
+#define LCRR_CLKDIV			0x0000001F
 #define LCRR_CLKDIV_SHIFT		0
 #define LCRR_CLKDIV_2			0x00000002
 #define LCRR_CLKDIV_4			0x00000004