[U-Boot] [PATCH 3/5] mx7ulp_evk: Change APLL and its PFD0 frequencies

[Peng Fan]

From: Ye Li <ye.li at nxp.com>

To support HDMI display on EVK board, the LCDIF pix clock must be
25.2Mhz. Since the its PCC divider range is from 1-8, the max rate
of LCDIF PCC source clock is 201.6Mhz. This limits the source clock
must from NIC1 bus clock or NIC1 clock, other sources from APLL PFDs
are higher than this max rate.

The NIC1 bus clock and NIC1 clock are from DDRCLK whose parent source
is APLL PFD0, so we must change the APLL PFD0 and have impact to DDRCLK,
NIC1 and NIC1 bus.

Eventually, this requests to set the APLL PFD0 frequency to 302.4Mhz
(25.2 * 12), with settings:

PFD0 FRAC:  32
APLL MULT:  22
APLL NUM:   2
APLL DENOM: 5

Signed-off-by: Ye Li <ye.li at nxp.com>
Tested-by: Fancy Fang <chen.fang at nxp.com>
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 board/freescale/mx7ulp_evk/imximage.cfg |  8 +++++++-
 board/freescale/mx7ulp_evk/plugin.S     | 20 +++++++++++++++++++-
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/board/freescale/mx7ulp_evk/imximage.cfg b/board/freescale/mx7ulp_evk/imximage.cfg
index e7d87beb5f..d4f6c3c62d 100644
--- a/board/freescale/mx7ulp_evk/imximage.cfg
+++ b/board/freescale/mx7ulp_evk/imximage.cfg
@@ -43,8 +43,14 @@ CSF CONFIG_CSF_SIZE
  */
 DATA 4   0x403f00dc 0x00000000
 DATA 4   0x403e0040 0x01000020
+DATA 4   0x403e0500 0x01000000
 DATA 4   0x403e050c 0x80808080
-DATA 4   0x403e050c 0x8080801E
+DATA 4   0x403e0508 0x00160000
+DATA 4   0x403E0510 0x00000002
+DATA 4   0x403E0514 0x00000005
+DATA 4   0x403e0500 0x00000001
+CHECK_BITS_SET 4 0x403e0500 0x01000000
+DATA 4   0x403e050c 0x80808020
 CHECK_BITS_SET 4 0x403e050c 0x00000040
 DATA 4   0x403E0030 0x00000001
 DATA 4   0x403e0040 0x11000020
diff --git a/board/freescale/mx7ulp_evk/plugin.S b/board/freescale/mx7ulp_evk/plugin.S
index 73636c679f..ccd2fc03a4 100644
--- a/board/freescale/mx7ulp_evk/plugin.S
+++ b/board/freescale/mx7ulp_evk/plugin.S
@@ -13,10 +13,28 @@
 	ldr r2, =0x403e0000
 	ldr r3, =0x01000020
 	str r3, [r2, #0x40]
+	ldr r3, =0x01000000
+	str r3, [r2, #0x500]
 
 	ldr r3, =0x80808080
 	str r3, [r2, #0x50c]
-	ldr r3, =0x8080801E
+	ldr r3, =0x00160000
+	str r3, [r2, #0x508]
+	ldr r3, =0x00000002
+	str r3, [r2, #0x510]
+	ldr r3, =0x00000005
+	str r3, [r2, #0x514]
+	ldr r3, =0x00000001
+	str r3, [r2, #0x500]
+
+	ldr r3, =0x01000000
+wait1:
+	ldr r4, [r2, #0x500]
+	and r4, r3
+	cmp r4, r3
+	bne wait1
+
+	ldr r3, =0x80808020
 	str r3, [r2, #0x50c]
 
 	ldr r3, =0x00000040
-- 
2.16.4