fwk: Change GN22 gpio2 EEPROM pin config to output

Add GPIO_FUNC_GPU_PWR_LEVEL function.
First just change the EEPROM GPIO configuration so that it will be correctly
overwritten during manufacturing.
Then in the next change we can change the EC logic to behave as required by
nvidia: Output to the GPU if AC-to-battery power change event or a system power
overdraw event.

BRANCH=fwk-tulip-29169
BUG=GPU_2A2_GPIO2_EC should be an output pin for EC, required by GN22
TEST=1.gpucfg erase
2.gpucfg write nvgpu "serial number"
3.reboot the EC
4.gpucfg and check GPIO02=1 in G3/S5

Signed-off-by: johnwc_yeh <JohnWC_Yeh@compal.com>

Author: JohnWC-Yeh

zephyr/program/framework/include/lotus/gpu_configuration.h

@@ -127,6 +127,7 @@ enum gpu_gpio_purpose {
 	GPIO_FUNC_VADP_EN,
 	GPIO_FUNC_GPU_PWR,
 	GPIO_FUNC_IS_THROTTLING,
+	GPIO_FUNC_GPU_PWR_LEVEL,
 	GPIO_FUNC_MAX,
 };
 

zephyr/program/framework/lotus/src/gpu_configuration.c

@@ -278,8 +278,9 @@ static struct default_gpu_cfg nv_gpu_cfg = {
 	.gpio0 = {.gpio = GPU_1G1_GPIO0_EC, .function = GPIO_FUNC_TEMPFAULT, .flags = GPIO_INPUT, .power_domain = POWER_S3},
 	/* DP HPD status from PD */
 	.gpio1 = {.gpio = GPU_1H1_GPIO1_EC, .function = GPIO_FUNC_HPD, .flags = GPIO_INPUT, .power_domain = POWER_S5},
-	/* output from the GPU if it is throttling */
-	.gpio2 = {.gpio = GPU_2A2_GPIO2_EC, .function = GPIO_FUNC_IS_THROTTLING, .flags = GPIO_INPUT, .power_domain = POWER_S0},
+	/* output to the GPU if AC-to-battery power change event or a system power overdraw event */
+	.gpio2 = {.gpio = GPU_2A2_GPIO2_EC, .function = GPIO_FUNC_GPU_PWR_LEVEL,
+				.flags = GPIO_OUTPUT_HIGH, .power_domain = POWER_G3},
 	/* DDS Mux CTRL  from dGPU */
 	.gpio3 = {.gpio = GPU_2L7_GPIO3_EC, .function = GPIO_FUNC_UNUSED, .flags = GPIO_INPUT, .power_domain = POWER_S0},
 	/* GPU_VSYS_EN */
@@ -513,6 +514,8 @@ const char * gpu_gpio_fn_to_name(enum gpu_gpio_purpose p)
 		return "GPUPWR";
 	case GPIO_FUNC_IS_THROTTLING:
 		return "THROTTLING";
+	case GPIO_FUNC_GPU_PWR_LEVEL:
+		return "GPU_PWR_LEVEL";
 	default: 
 		return "UNKNOWN IDX";
 	}