INKA4x0: Allow initialization of LCD backlight dimming from

"brightness" environment variable.

INKA4x0: Allow initialization of LCD backlight dimming from
"brightness" environment variable.
wdenk
1 parent e9684a536a
Showing 4 changed files with 20 additions and 0 deletions Side-by-side Diff
CHANGELOG
board/inka4x0/inka4x0.c
include/configs/inka4x0.h
include/mpc5xxx.h
@@ -5,6 +5,9 @@
 * Patch by Stefan Roese, 14 March 2005:
   Update for esd voh405 fpga image
  
+* INKA4x0: Allow initialization of LCD backlight dimming from
+  "brightness" environment variable.
+
 * Add port initialization for digital I/O on INKA4x0
  
 * Patch by Stefan Roese, 01 March 2005:
@@ -177,6 +177,16 @@
  
 int misc_init_f (void)
 {
+	uchar tmp[10];
+	int i, br;
+
+	i = getenv_r("brightness", tmp, sizeof(tmp));
+	br = (i > 0)
+		? (int) simple_strtoul (tmp, NULL, 10)
+		: CFG_BRIGHTNESS;
+	if (br > 255)
+		br = 255;
+
 	/* Initialize GPIO output pins.
 	 */
 	/* Configure GPT as GPIO output */
@@ -187,6 +197,11 @@
 	*(vu_long *)MPC5XXX_GPT4_ENABLE =
 	*(vu_long *)MPC5XXX_GPT5_ENABLE = 0x24;
  
+	/* Configure GPT7 as PWM timer, 1kHz, no ints. */
+	*(vu_long *)MPC5XXX_GPT7_ENABLE = 0;/* Disable */
+	*(vu_long *)MPC5XXX_GPT7_COUNTER = 0x020000fe;
+	*(vu_long *)MPC5XXX_GPT7_PWMCFG = (br << 16);
+	*(vu_long *)MPC5XXX_GPT7_ENABLE = 0x3;/* Enable PWM mode and start */
  
 	/* Configure PSC3_6,7 as GPIO output */
 	*(vu_long *)MPC5XXX_GPIO_ENABLE |= 0x00003000;
@@ -324,6 +324,7 @@
 #define CFG_ATA_STRIDE          4
  
 #define CONFIG_ATAPI            1
+#define CFG_BRIGHTNESS          0x20
  
 #endif /* __CONFIG_H */
@@ -248,6 +248,7 @@
 #define MPC5XXX_GPT7_ENABLE		(MPC5XXX_GPT + 0x70)
 #define MPC5XXX_GPT7_COUNTER		(MPC5XXX_GPT + 0x74)
  
+#define MPC5XXX_GPT7_PWMCFG		(MPC5XXX_GPT + 0x78)
  
 /* ATA registers */
 #define MPC5XXX_ATA_HOST_CONFIG         (MPC5XXX_ATA + 0x0000)
...	...	@@ -5,6 +5,9 @@
5	5	* Patch by Stefan Roese, 14 March 2005:
6	6	Update for esd voh405 fpga image
7	7
	8	+* INKA4x0: Allow initialization of LCD backlight dimming from
	9	+ "brightness" environment variable.
	10	+
8	11	* Add port initialization for digital I/O on INKA4x0
9	12
10	13	* Patch by Stefan Roese, 01 March 2005:
...	...	@@ -177,6 +177,16 @@
177	177
178	178	int misc_init_f (void)
179	179	{
	180	+ uchar tmp[10];
	181	+ int i, br;
	182	+
	183	+ i = getenv_r("brightness", tmp, sizeof(tmp));
	184	+ br = (i > 0)
	185	+ ? (int) simple_strtoul (tmp, NULL, 10)
	186	+ : CFG_BRIGHTNESS;
	187	+ if (br > 255)
	188	+ br = 255;
	189	+
180	190	/* Initialize GPIO output pins.
181	191	*/
182	192	/* Configure GPT as GPIO output */
...	...	@@ -187,6 +197,11 @@
187	197	(vu_long )MPC5XXX_GPT4_ENABLE =
188	198	(vu_long )MPC5XXX_GPT5_ENABLE = 0x24;
189	199
	200	+ /* Configure GPT7 as PWM timer, 1kHz, no ints. */
	201	+ (vu_long )MPC5XXX_GPT7_ENABLE = 0;/* Disable */
	202	+ (vu_long )MPC5XXX_GPT7_COUNTER = 0x020000fe;
	203	+ (vu_long )MPC5XXX_GPT7_PWMCFG = (br << 16);
	204	+ (vu_long )MPC5XXX_GPT7_ENABLE = 0x3;/* Enable PWM mode and start */
190	205
191	206	/* Configure PSC3_6,7 as GPIO output */
192	207	(vu_long )MPC5XXX_GPIO_ENABLE \|= 0x00003000;
...	...	@@ -324,6 +324,7 @@
324	324	#define CFG_ATA_STRIDE 4
325	325
326	326	#define CONFIG_ATAPI 1
	327	+#define CFG_BRIGHTNESS 0x20
327	328
328	329	#endif /* __CONFIG_H */
...	...	@@ -248,6 +248,7 @@
248	248	#define MPC5XXX_GPT7_ENABLE (MPC5XXX_GPT + 0x70)
249	249	#define MPC5XXX_GPT7_COUNTER (MPC5XXX_GPT + 0x74)
250	250
	251	+#define MPC5XXX_GPT7_PWMCFG (MPC5XXX_GPT + 0x78)
251	252
252	253	/* ATA registers */
253	254	#define MPC5XXX_ATA_HOST_CONFIG (MPC5XXX_ATA + 0x0000)