dm8168 gpio0_25 can not output 1

Hi Vefone,

vefone said:

__raw_writew((PTU | EN | M1), PINCTRL200_ADDR);

vefone said:

the value of PINCTRL200_ADDR is 0x48140B1C

vefone said:

atfer executing __raw_writew((PTU | EN | M1), PINCTRL200_ADDR); the value of the address 0x48140B1C not change.

In which u-boot file you are making these changes? What is the value you have in PINCTRL200 register?

Regards,
Pavel

Hi,Pavel

I make these changes in the board/ti/ti8168/evm.c file.

Here are the change:

+#define PINCTRL193_ADDR 0x48140B00
+#define PINCTRL200_ADDR 0x48140B1C
+#define TI816X_GPIO0_BASE 0x48032000
+#define TI816X_GPIO1_BASE 0x4804C000
+
/*******************************************************
* Routine: misc_init_r
********************************************************/
int misc_init_r (void)
{
+ u32 reg_val = 0;
#ifdef CONFIG_TI816X_ASCIIART
int i = 0, j = 0;
+
+ /* tl8168 som led1.gpio1_13 */
+ __raw_writew(0x2, CM_ALWON_GPIO_1_CLKCTRL);
+ while(__raw_readl(CM_ALWON_GPIO_1_CLKCTRL) != 0x2);
+
+ __raw_writew((PTU | EN | M1), PINCTRL193_ADDR);
+ reg_val = __raw_readl(TI816X_GPIO1_BASE + 0x134);
+ reg_val &= ~(unsigned int)BIT(13);
+ __raw_writew(reg_val, TI816X_GPIO1_BASE + 0x134);
+ __raw_writew(BIT(13), TI816X_GPIO1_BASE + 0x194);
+
char ti816x[23][79] = {
":,;;:;:;;;;;;;;r;;:,;;:;:;;;;;;;;:,;;:;:;;;;;;;;:,;;:;:;;;;;;;;:;;;;;;;;:,;;:;
";,;:::;;;;r;;;rssiSiS552X5252525259GX2X9hX9X9XX2325S55252i5:,;;:;:;;;;;;;;:,;;
@@ -957,6 +974,16 @@ int misc_init_r (void)
printf("\n");
}
printf("\n");
+ #else
+ /* tl8168 som led0.gpio0_25 */
+ __raw_writew(0x2, CM_ALWON_GPIO_0_CLKCTRL);
+ while(__raw_readl(CM_ALWON_GPIO_0_CLKCTRL) != 0x2);
+
+ __raw_writew((PTU | EN | M1), PINCTRL200_ADDR);
+ reg_val = __raw_readl(TI816X_GPIO0_BASE + 0x134);
+ reg_val &= ~(unsigned int)BIT(25);
+ __raw_writew(reg_val, TI816X_GPIO0_BASE + 0x134);
+ __raw_writew(BIT(25), TI816X_GPIO0_BASE + 0x194);
#endif
return 0;
}

I debug the MLO,when it run to misc_init_r(),I read the value of CM_ALWON_GPIO_0_CLKCTRL register,and it is 0x30100. The value of 16 bit - 17 bit is 0x3,which means that Module is disabled and cannot be accessed.After the "__raw_writew(0x2, CM_ALWON_GPIO_0_CLKCTRL);" execute,the value of CM_ALWON_GPIO_0_CLKCTRL register  is 0x2,enabling the GPIO0 module.Then I go one by one step.The value of GPIO_OE register(gpio0) is 0xffffffff,and the value of  GPIO_SETDATAOUT is 0x00000000.The value of GPIO_OE should  change to 0xfdffffff after "__raw_writew(reg_val, TI816X_GPIO0_BASE + 0x134);" execute,but it doesn't change.So does the GPIO_SETDATAOUT  register.

The value of PINCTRL200 register is 0x00000019.

BR,

vefone

Vefone,

vefone said:

What' s more.When I use the ccs memory brower to change the value of GPIO_OE and GPIO_SETDATAOUT ,the led light.

When the led light, what value you have in PINCTRL200 register? Is it still 0x00000019? I want to confirm that the value in PINCTRL200 is correct, then we can focus on the GPIO registers values.

BR
Pavel

vefone said:

+ reg_val = __raw_readl(TI816X_GPIO0_BASE + 0x134);
+ reg_val &= ~(unsigned int)BIT(25);
+ __raw_writew(reg_val, TI816X_GPIO0_BASE + 0x134);

vefone said:

The value of GPIO_OE register(gpio0) is 0xffffffff

vefone said:

The value of GPIO_OE should  change to 0xfdffffff after "__raw_writew(reg_val, TI816X_GPIO0_BASE + 0x134);" execute,but it doesn't change.

Can you put printf statements to see what exactly you are reading and writing to GPIO_OE?

reg_val = __raw_readl(TI816X_GPIO0_BASE + 0x134);
+ printf("before write GPIO_OE = %x\n", reg_val);
reg_val &= ~(unsigned int)BIT(25);
+ printf("mask = %x\n", reg_val);
__raw_writew(reg_val, TI816X_GPIO0_BASE + 0x134);
+printf("after write GPIO_OE = %x\n", __raw_readl(TI816X_GPIO0_BASE + 0x134));

Regards,
Pavel

Hi,pavel

BR,

vefone