power: regulator: rk8xx: Allow input current/charger shutdown configuration

The RK818 PMIC contains a charger. Add very basic charger functionality
to be able to regulate the USB input current and charger shutdown limits.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

diff --git a/drivers/power/regulator/rk8xx.c b/drivers/power/regulator/rk8xx.c
index d96a1f85e8fa1ece109da162aeb41dbde1d78657..7c0a3aaa89538939257b1584034cf1f79ab1c3b6 100644 (file)
--- a/drivers/power/regulator/rk8xx.c
+++ b/drivers/power/regulator/rk8xx.c
@@ -30,6 +30,9 @@
 #define RK818_LDO_VSEL_MASK            0x1f
 #define RK818_LDO3_ON_VSEL_MASK        0xf
 #define RK818_BOOST_ON_VSEL_MASK       0xe0
+#define RK818_USB_ILIM_SEL_MASK                0x0f
+#define RK818_USB_CHG_SD_VSEL_MASK     0x70
+
 
 struct rk8xx_reg_info {
        uint min_uv;
@@ -76,6 +79,14 @@ static const struct rk8xx_reg_info rk818_ldo[] = {
 };
 #endif
 
+static const u16 rk818_chrg_cur_input_array[] = {
+       450, 800, 850, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 2750, 3000
+};
+
+static const uint rk818_chrg_shutdown_vsel_array[] = {
+       2780000, 2850000, 2920000, 2990000, 3060000, 3130000, 3190000, 3260000
+};
+
 static const struct rk8xx_reg_info *get_buck_reg(struct udevice *pmic,
                                             int num)
 {
@@ -353,3 +364,26 @@ int rk8xx_spl_configure_buck(struct udevice *pmic, int buck, int uvolt)
 
        return _buck_set_enable(pmic, buck, true);
 }
+
+int rk818_spl_configure_usb_input_current(struct udevice *pmic, int current_ma)
+{
+       uint i;
+
+       for (i = 0; i < ARRAY_SIZE(rk818_chrg_cur_input_array); i++)
+               if (current_ma <= rk818_chrg_cur_input_array[i])
+                       break;
+
+       return pmic_clrsetbits(pmic, REG_USB_CTRL, RK818_USB_ILIM_SEL_MASK, i);
+}
+
+int rk818_spl_configure_usb_chrg_shutdown(struct udevice *pmic, int uvolt)
+{
+       uint i;
+
+       for (i = 0; i < ARRAY_SIZE(rk818_chrg_shutdown_vsel_array); i++)
+               if (uvolt <= rk818_chrg_shutdown_vsel_array[i])
+                       break;
+
+       return pmic_clrsetbits(pmic, REG_USB_CTRL, RK818_USB_CHG_SD_VSEL_MASK,
+                              i);
+}

diff --git a/include/power/rk8xx_pmic.h b/include/power/rk8xx_pmic.h
index 589f8c4e1a93e00be36695dc5b6a136535d87298..47a6b36e7ea453035006d931a73ffb98c7d992a3 100644 (file)
--- a/include/power/rk8xx_pmic.h
+++ b/include/power/rk8xx_pmic.h
@@ -189,5 +189,7 @@ struct rk8xx_priv {
 };
 
 int rk8xx_spl_configure_buck(struct udevice *pmic, int buck, int uvolt);
+int rk818_spl_configure_usb_input_current(struct udevice *pmic, int current_ma);
+int rk818_spl_configure_usb_chrg_shutdown(struct udevice *pmic, int uvolt);
 
 #endif