linux-kernel - [PATCH 1/3] iio: adc: aspeed: Orgnaize and add the define of adc

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Date:   Tue, 13 Oct 2020 18:32:43 +0800
From:   Billy Tsai <billy_tsai@...eedtech.com>
To:     <jic23@...nel.org>, <knaack.h@....de>, <lars@...afoo.de>,
        <pmeerw@...erw.net>, <robh+dt@...nel.org>, <joel@....id.au>,
        <andrew@...id.au>, <p.zabel@...gutronix.de>,
        <billy_tsai@...eedtech.com>, <alexandru.ardelean@...log.com>,
        <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>
CC:     <BMC-SW@...eedtech.com>
Subject: [PATCH 1/3] iio: adc: aspeed: Orgnaize and add the define of adc

This patch organizes the define of adc to multiple partitions
and adds the new bit field define for ast2600 driver.

Signed-off-by: Billy Tsai <billy_tsai@...eedtech.com>
---
 drivers/iio/adc/aspeed_adc.c | 42 ++++++++++++++++++++++++++++++++----
 1 file changed, 38 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c
index 1e5375235cfe..ae400c4d6d40 100644
--- a/drivers/iio/adc/aspeed_adc.c
+++ b/drivers/iio/adc/aspeed_adc.c
@@ -21,23 +21,57 @@
 #include <linux/iio/driver.h>
 #include <linux/iopoll.h>
 
+/**********************************************************
+ * ADC feature define
+ *********************************************************/
 #define ASPEED_RESOLUTION_BITS		10
 #define ASPEED_CLOCKS_PER_SAMPLE	12
 
+/**********************************************************
+ * ADC HW register offset define
+ *********************************************************/
 #define ASPEED_REG_ENGINE_CONTROL	0x00
 #define ASPEED_REG_INTERRUPT_CONTROL	0x04
 #define ASPEED_REG_VGA_DETECT_CONTROL	0x08
 #define ASPEED_REG_CLOCK_CONTROL	0x0C
+#define ASPEED_REG_COMPENSATION_TRIM	0xC4
 #define ASPEED_REG_MAX			0xC0
 
+/**********************************************************
+ * ADC register Bit field
+ *********************************************************/
+/*ENGINE_CONTROL */
+/* [0] */
+#define ASPEED_ENGINE_ENABLE		BIT(0)
+/* [3:1] */
 #define ASPEED_OPERATION_MODE_POWER_DOWN	(0x0 << 1)
 #define ASPEED_OPERATION_MODE_STANDBY		(0x1 << 1)
 #define ASPEED_OPERATION_MODE_NORMAL		(0x7 << 1)
-
-#define ASPEED_ENGINE_ENABLE		BIT(0)
-
+/* [4] */
+#define ASPEED_CTRL_COMPENSATION	BIT(4)
+/* [5] */
+#define ASPEED_AUTOPENSATING		BIT(5)
+/* [7:6] */
+#define ASPEED_REF_VOLTAGE_2500mV	(0 << 6)
+#define ASPEED_REF_VOLTAGE_1200mV	(1 << 6)
+#define ASPEED_REF_VOLTAGE_EXT_HIGH	(2 << 6)
+#define ASPEED_REF_VOLTAGE_EXT_LOW	(3 << 6)
+#define ASPEED_BATTERY_SENSING_VOL_DIVIDE_2_3	(0 << 6)
+#define ASPEED_BATTERY_SENSING_VOL_DIVIDE_1_3	(1 << 6)
+/* [8] */
 #define ASPEED_ADC_CTRL_INIT_RDY	BIT(8)
-
+/* [12] */
+#define ASPEED_ADC_CH7_VOLTAGE_NORMAL	(0 << 12)
+#define ASPEED_ADC_CH7_VOLTAGE_BATTERY	(1 << 12)
+/* [13] */
+#define ASPEED_ADC_EN_BATTERY_SENSING	BIT(13)
+/* [31:16] */
+#define ASPEED_ADC_CTRL_CH_EN(n)	(1 << (16 + n))
+#define ASPEED_ADC_CTRL_CH_EN_ALL	GENMASK(31, 16)
+
+/**********************************************************
+ * Software setting
+ *********************************************************/
 #define ASPEED_ADC_INIT_POLLING_TIME	500
 #define ASPEED_ADC_INIT_TIMEOUT		500000
 
-- 
2.17.1