charger: max14577: Configure battery-dependent settings from DTS and sysfs

Remove hard-coded values for:
 - Fast Charge current,
 - End Of Charge current,
 - Fast Charge timer,
 - Overvoltage Protection Threshold,
 - Battery Constant Voltage,
and use DTS or sysfs to configure them. This allows using the max14577 charger
driver with different batteries.

Now the charger driver requires valid configuration data from DTS. In
case of wrong configuration data it fails during probe.

The fast charge timer is configured through sysfs entry.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

2 files changed, 26 insertions, 0 deletions

diff --git a/include/linux/mfd/max14577-private.h b/include/linux/mfd/max14577-private.h
index 7d514839c764..f01c1fae4d84 100644
--- a/include/linux/mfd/max14577-private.h
+++ b/include/linux/mfd/max14577-private.h
@@ -293,6 +293,25 @@ enum max14577_charger_reg {
 #define MAX77836_CHARGER_CURRENT_LIMIT_HIGH_STEP         25000U
 #define MAX77836_CHARGER_CURRENT_LIMIT_MAX              475000U
 
+/*
+ * MAX14577 charger End-Of-Charge current limits
+ * (as in CHGCTRL5 register), uA
+ */
+#define MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN          50000U
+#define MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP         10000U
+#define MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX          200000U
+
+/*
+ * MAX14577/MAX77836 Battery Constant Voltage
+ * (as in CHGCTRL3 register), uV
+ */
+#define MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN              4000000U
+#define MAXIM_CHARGER_CONSTANT_VOLTAGE_STEP             20000U
+#define MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX              4350000U
+
+/* Default value for fast charge timer, in hours */
+#define MAXIM_CHARGER_FAST_CHARGE_TIMER_DEFAULT         5
+
 /* MAX14577 regulator SFOUT LDO voltage, fixed, uV */
 #define MAX14577_REGULATOR_SAFEOUT_VOLTAGE              4900000
 
diff --git a/include/linux/mfd/max14577.h b/include/linux/mfd/max14577.h
index 3c098d57b1d1..ccfaf952c31b 100644
--- a/include/linux/mfd/max14577.h
+++ b/include/linux/mfd/max14577.h
@@ -54,6 +54,13 @@ struct max14577_regulator_platform_data {
         struct device_node *of_node;
 };
 
+struct max14577_charger_platform_data {
+        u32 constant_uvolt;
+        u32 fast_charge_uamp;
+        u32 eoc_uamp;
+        u32 ovp_uvolt;
+};
+
 /*
  * MAX14577 MFD platform data
  */