keyscan: decouple keyboard_raw functionality from the presence of TASK_KEYSCAN

With the addition of external i2c keyboard controllers, chips that don't
necessarly have gpios going to a keyboard can now still have a TASK_KEYSCAN.
Therefore it's wrong to assume we want the chip/*/keyboard_raw code included.

There was no easy way to make an ways on option (eg: CONFIG_KEYBOARD_RAW)
that could get #undefd in strategic places. The place that would always
define it would be in include/config.h but I don't believe that executes
before the build.mk rules.

BUG=b:135895590
TEST=Other boards with keyboards still happy.
TEST=No compile errors (regarding missing keyboard GPIOS) when declaring
TASK_KEYSCAN on a fresh stm32 board.
BRANCH=master

Change-Id: I061812a6941a11784950280648912edd5844bd79
Signed-off-by: Alexandru M Stan <amstan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1693862
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>

chip/host/build.mk

@@ -10,7 +10,9 @@ CORE:=host
 
 chip-y=system.o gpio.o uart.o persistence.o flash.o lpc.o reboot.o i2c.o \
 	clock.o spi_master.o trng.o
+ifndef CONFIG_KEYBOARD_NOT_RAW
 chip-$(HAS_TASK_KEYSCAN)+=keyboard_raw.o
+endif
 chip-$(CONFIG_USB_PD_TCPC)+=usb_pd_phy.o
 
 ifeq ($(CONFIG_DCRYPTO),y)

chip/it83xx/build.mk

@@ -31,6 +31,8 @@ chip-$(CONFIG_HOSTCMD_X86)+=lpc.o ec2i.o
 chip-$(CONFIG_HOSTCMD_ESPI)+=espi.o
 chip-$(CONFIG_SPI_MASTER)+=spi_master.o
 chip-$(CONFIG_PECI)+=peci.o
+ifndef CONFIG_KEYBOARD_NOT_RAW
 chip-$(HAS_TASK_KEYSCAN)+=keyboard_raw.o
+endif
 chip-$(CONFIG_I2C_MASTER)+=i2c.o
 chip-$(CONFIG_I2C_SLAVE)+=i2c_slave.o

chip/lm4/build.mk

@@ -26,4 +26,6 @@ chip-$(CONFIG_PECI)+=peci.o
 chip-$(CONFIG_PWM)+=pwm.o fan.o
 chip-$(CONFIG_SPI)+=spi.o
 chip-$(CONFIG_WATCHDOG)+=watchdog.o
+ifndef CONFIG_KEYBOARD_NOT_RAW
 chip-$(HAS_TASK_KEYSCAN)+=keyboard_raw.o
+endif

chip/mchp/build.mk

@@ -43,7 +43,9 @@ chip-$(CONFIG_PWM)+=pwm.o
 chip-$(CONFIG_SPI)+=spi.o qmspi.o
 chip-$(CONFIG_TFDP)+=tfdp.o
 chip-$(CONFIG_WATCHDOG)+=watchdog.o
+ifndef CONFIG_KEYBOARD_NOT_RAW
 chip-$(HAS_TASK_KEYSCAN)+=keyboard_raw.o
+endif
 
 # location of the scripts and keys used to pack the SPI flash image
 SCRIPTDIR:=./chip/${CHIP}/util

chip/mec1322/build.mk

@@ -25,7 +25,9 @@ chip-$(CONFIG_I2C)+=i2c.o
 chip-$(CONFIG_HOSTCMD_LPC)+=lpc.o
 chip-$(CONFIG_PWM)+=pwm.o
 chip-$(CONFIG_WATCHDOG)+=watchdog.o
+ifndef CONFIG_KEYBOARD_NOT_RAW
 chip-$(HAS_TASK_KEYSCAN)+=keyboard_raw.o
+endif
 chip-$(CONFIG_DMA)+=dma.o
 chip-$(CONFIG_SPI)+=spi.o
 

chip/npcx/build.mk

@@ -35,7 +35,9 @@ chip-$(CONFIG_CEC)+=cec.o
 chip-$(CONFIG_PWM)+=pwm.o
 chip-$(CONFIG_SPI)+=spi.o
 chip-$(CONFIG_WATCHDOG)+=watchdog.o
+ifndef CONFIG_KEYBOARD_NOT_RAW
 chip-$(HAS_TASK_KEYSCAN)+=keyboard_raw.o
+endif
 chip-$(CONFIG_WAKE_ON_VOICE)+=apm.o
 chip-$(CONFIG_WAKE_ON_VOICE)+=wov.o
 

chip/nrf51/build.mk

@@ -21,4 +21,6 @@ chip-$(CONFIG_BLUETOOTH_LE)+=radio.o bluetooth_le.o
 chip-$(CONFIG_BLUETOOTH_LE_RADIO_TEST)+=radio_test.o
 chip-$(CONFIG_COMMON_TIMER)+=hwtimer.o clock.o
 chip-$(CONFIG_I2C)+=i2c.o
+ifndef CONFIG_KEYBOARD_NOT_RAW
 chip-$(HAS_TASK_KEYSCAN)+=keyboard_raw.o
+endif

chip/stm32/build.mk

@@ -55,7 +55,9 @@ chip-$(CONFIG_STREAM_USART)+=usart_rx_dma.o usart_tx_dma.o
 chip-$(CONFIG_CMD_USART_INFO)+=usart_info_command.o
 chip-$(CONFIG_WATCHDOG)+=watchdog.o
 chip-$(HAS_TASK_CONSOLE)+=uart.o
+ifndef CONFIG_KEYBOARD_NOT_RAW
 chip-$(HAS_TASK_KEYSCAN)+=keyboard_raw.o
+endif
 chip-$(HAS_TASK_POWERLED)+=power_led.o
 chip-$(CONFIG_FLASH_PHYSICAL)+=flash-$(CHIP_FAMILY).o
 ifdef CONFIG_FLASH_PHYSICAL

include/config.h

@@ -2416,6 +2416,13 @@
 /* Enable extra debugging output from keyboard modules */
 #undef CONFIG_KEYBOARD_DEBUG
 
+/*
+ * Disables the directly connected keyboard pins and drivers on a particular
+ * chip. You might want this enabled if the keyboard is indirectly connected
+ * to the EC, perhaps through an I2C controller.
+ */
+#undef CONFIG_KEYBOARD_NOT_RAW
+
 /* The board uses a negative edge-triggered GPIO for keyboard interrupts. */
 #undef CONFIG_KEYBOARD_IRQ_GPIO
 
@@ -2507,6 +2514,7 @@
  * Enable keypad (a palm-sized keyboard section usually placed on the far right)
  */
 #undef CONFIG_KEYBOARD_KEYPAD
+
 /*****************************************************************************/
 
 /* Support common LED interface */