[src/trunk]: src/sys/dev/i2c define control register and associated bits for ...

[tnn <tnn%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e10bd5e0a367
branches:  trunk
changeset: 823918:e10bd5e0a367
user:      tnn <tnn%NetBSD.org@localhost>
date:      Sun May 14 11:39:17 2017 +0000

description:
define control register and associated bits for RTC supercap charger

diffstat:

 sys/dev/i2c/axp20x.c |  43 +++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 41 insertions(+), 2 deletions(-)

diffs (71 lines):

diff -r 41e365b49952 -r e10bd5e0a367 sys/dev/i2c/axp20x.c
--- a/sys/dev/i2c/axp20x.c      Sun May 14 11:28:49 2017 +0000
+++ b/sys/dev/i2c/axp20x.c      Sun May 14 11:39:17 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: axp20x.c,v 1.4 2015/10/15 13:48:57 bouyer Exp $ */
+/* $NetBSD: axp20x.c,v 1.5 2017/05/14 11:39:17 tnn Exp $ */
 
 /*-
  * Copyright (c) 2014 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: axp20x.c,v 1.4 2015/10/15 13:48:57 bouyer Exp $");
+__KERNEL_RCSID(0, "$NetBSD: axp20x.c,v 1.5 2017/05/14 11:39:17 tnn Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -99,6 +99,33 @@
 #define AXP_LDO3_VOLT_MASK             __BITS(0,6)
 #define AXP_LDO3_VOLT_SHIFT            0
 
+#define AXP_BKUP_CTRL                  0x35
+#define AXP_BKUP_CTRL_ENABLE           __BIT(7)
+#define AXP_BKUP_CTRL_VOLT_MASK                __BITS(5,6)
+#define AXP_BKUP_CTRL_VOLT_SHIFT       5
+#define AXP_BKUP_CTRL_VOLT_3V1         0
+#define AXP_BKUP_CTRL_VOLT_3V0         1
+#define AXP_BKUP_CTRL_VOLT_3V6         2
+#define AXP_BKUP_CTRL_VOLT_2V5         3
+static int bkup_volt[] = {
+       3100,
+       3000,
+       3600,
+       2500
+};
+#define AXP_BKUP_CTRL_CURR_MASK                __BITS(0,1)
+#define AXP_BKUP_CTRL_CURR_SHIFT       0
+#define AXP_BKUP_CTRL_CURR_50U         0
+#define AXP_BKUP_CTRL_CURR_100U                1
+#define AXP_BKUP_CTRL_CURR_200U                2
+#define AXP_BKUP_CTRL_CURR_400U                3
+static int bkup_curr[] = {
+       50,
+       100,
+       200,
+       400
+};
+
 #define AXP_ACV_MON_REG                0x56    /* 2 bytes */
 #define AXP_ACI_MON_REG                0x58    /* 2 bytes */
 #define AXP_VBUSV_MON_REG      0x5a    /* 2 bytes */
@@ -347,6 +374,18 @@
                            (int)(700 + (value & AXP_LDO3_VOLT_MASK) * 25));
                }
        }
+
+       if (axp20x_read(sc, AXP_BKUP_CTRL, &value, 1, I2C_F_POLL) == 0) {
+               if (value & AXP_BKUP_CTRL_ENABLE) {
+                       aprint_verbose_dev(sc->sc_dev,
+                           "RTC supercap charger enabled: %dmV at %duA\n",
+                           bkup_volt[(value & AXP_BKUP_CTRL_VOLT_MASK) >>
+                           AXP_BKUP_CTRL_VOLT_SHIFT],
+                           bkup_curr[(value & AXP_BKUP_CTRL_CURR_MASK) >>
+                           AXP_BKUP_CTRL_CURR_SHIFT]
+                       );
+               }
+       }
 }
 
 static void