soc/mediatek: Move auxadc driver from MT8183 to common

The auxadc (auxiliary analogue-to-digital conversion) is a unit
to identify the plugged peripherals or measure the temperature
or voltages.

The MT8183 auxadc driver can be shared by multiple MediaTek SoCs
so we should move it to the common folder.

Signed-off-by: Po Xu <jg_poxu@mediatek.com>
Change-Id: Id4553e99c3578fa40e28b19a6e010b52650ba41e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46390
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>

4 files changed, 22 insertions, 13 deletions

diff --git a/src/soc/mediatek/mt8183/auxadc.c b/src/soc/mediatek/common/auxadc.c
index 19c994872f..6dbf12bbe9 100644
--- a/src/soc/mediatek/mt8183/auxadc.c
+++ b/src/soc/mediatek/common/auxadc.c
@@ -1,12 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <device/mmio.h>
 #include <assert.h>
 #include <delay.h>
+#include <device/mmio.h>
 #include <soc/addressmap.h>
 #include <soc/auxadc.h>
 #include <soc/efuse.h>
-#include <soc/infracfg.h>
 #include <timer.h>
 
 static struct mtk_auxadc_regs *const mtk_auxadc = (void *)AUXADC_BASE;
@@ -36,9 +35,10 @@ static void mt_auxadc_update_cali(void)
 		cali_oe = cali_oe_a - 512;
 	}
 }
+
 static uint32_t auxadc_get_rawdata(int channel)
 {
-	setbits32(&mt8183_infracfg->module_sw_cg_1_clr, 1 << 10);
+	setbits32(&mtk_infracfg->module_sw_cg_1_clr, 1 << 10);
 	assert(wait_ms(300, !(read32(&mtk_auxadc->con2) & 0x1)));
 
 	clrbits32(&mtk_auxadc->con1, 1 << channel);
@@ -50,12 +50,12 @@ static uint32_t auxadc_get_rawdata(int channel)
 
 	uint32_t value = read32(&mtk_auxadc->data[channel]) & 0x0FFF;
 
-	setbits32(&mt8183_infracfg->module_sw_cg_1_set, 1 << 10);
+	setbits32(&mtk_infracfg->module_sw_cg_1_set, 1 << 10);
 
 	return value;
 }
 
-int auxadc_get_voltage(unsigned int channel)
+unsigned int auxadc_get_voltage_uv(unsigned int channel)
 {
 	uint32_t raw_value;
 	assert(channel < 16);
@@ -67,7 +67,6 @@ int auxadc_get_voltage(unsigned int channel)
 
 	/* 1.5V in 4096 steps */
 	raw_value = auxadc_get_rawdata(channel);
-
 	raw_value = raw_value - cali_oe;
-	return (int)((int64_t)raw_value * 1500000 / (4096 + cali_ge));
+	return (unsigned int)((int64_t)raw_value * 1500000 / (4096 + cali_ge));
 }
diff --git a/src/soc/mediatek/common/include/soc/auxadc_common.h b/src/soc/mediatek/common/include/soc/auxadc_common.h
new file mode 100644
index 0000000000..de2408fef1
--- /dev/null
+++ b/src/soc/mediatek/common/include/soc/auxadc_common.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _MTK_ADC_COMMON_H
+#define _MTK_ADC_COMMON_H
+
+/* Return voltage in uVolt */
+unsigned int auxadc_get_voltage_uv(unsigned int channel);
+#endif
diff --git a/src/soc/mediatek/mt8183/Makefile.inc b/src/soc/mediatek/mt8183/Makefile.inc
index b0dd48f7a4..43893c363d 100644
--- a/src/soc/mediatek/mt8183/Makefile.inc
+++ b/src/soc/mediatek/mt8183/Makefile.inc
@@ -1,7 +1,7 @@
 ifeq ($(CONFIG_SOC_MEDIATEK_MT8183),y)
 
-bootblock-y += auxadc.c
 bootblock-y += bootblock.c
+bootblock-y += ../common/auxadc.c
 bootblock-y += ../common/gpio.c gpio.c
 bootblock-y += ../common/pll.c pll.c
 bootblock-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
@@ -15,7 +15,7 @@ decompressor-y += decompressor.c
 decompressor-y += ../common/mmu_operations.c
 decompressor-y += ../common/timer.c
 
-verstage-y += auxadc.c
+verstage-y += ../common/auxadc.c
 verstage-y += ../common/gpio.c gpio.c
 verstage-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
 verstage-y += mt8183.c
@@ -24,7 +24,7 @@ verstage-y += ../common/timer.c
 verstage-y += ../common/uart.c
 verstage-y += ../common/wdt.c
 
-romstage-y += auxadc.c
+romstage-y += ../common/auxadc.c
 romstage-y += ../common/cbmem.c emi.c
 romstage-y += dramc_init_setting.c
 romstage-y += dramc_param.c
@@ -44,8 +44,8 @@ romstage-y += ../common/timer.c
 romstage-y += ../common/uart.c
 romstage-y += ../common/wdt.c
 
-ramstage-y += auxadc.c
 ramstage-y += emi.c
+ramstage-y += ../common/auxadc.c
 ramstage-y += ../common/ddp.c ddp.c
 ramstage-y += ../common/dsi.c dsi.c
 ramstage-y += ../common/gpio.c gpio.c
diff --git a/src/soc/mediatek/mt8183/include/soc/auxadc.h b/src/soc/mediatek/mt8183/include/soc/auxadc.h
index 18350d63f0..0e07de073c 100644
--- a/src/soc/mediatek/mt8183/include/soc/auxadc.h
+++ b/src/soc/mediatek/mt8183/include/soc/auxadc.h
@@ -3,6 +3,8 @@
 #ifndef _MTK_ADC_H
 #define _MTK_ADC_H
 
+#include <soc/auxadc_common.h>
+#include <soc/infracfg.h>
 #include <stdint.h>
 
 typedef struct mtk_auxadc_regs {
@@ -16,6 +18,6 @@ typedef struct mtk_auxadc_regs {
 	uint32_t misc;
 } mtk_auxadc_regs;
 
-/* Return voltage in uVolt */
-int auxadc_get_voltage(unsigned int channel);
+static struct mt8183_infracfg_regs *const mtk_infracfg = mt8183_infracfg;
+
 #endif