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>

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>
Wadim Egorov · Philipp Tomsich
1 parent 8926c2f584
Showing 2 changed files with 36 additions and 0 deletions Side-by-side Diff
drivers/power/regulator/rk8xx.c
include/power/rk8xx_pmic.h
@@ -30,7 +30,10 @@
 #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;
 	uint step_uv;
@@ -76,6 +79,14 @@
 };
 #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)
 {
@@ -352,5 +363,28 @@
 		return ret;
  
 	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);
 }
@@ -189,6 +189,8 @@
 };
  
 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
...	...	@@ -30,7 +30,10 @@
30	30	#define RK818_LDO_VSEL_MASK 0x1f
31	31	#define RK818_LDO3_ON_VSEL_MASK 0xf
32	32	#define RK818_BOOST_ON_VSEL_MASK 0xe0
	33	+#define RK818_USB_ILIM_SEL_MASK 0x0f
	34	+#define RK818_USB_CHG_SD_VSEL_MASK 0x70
33	35
	36	+
34	37	struct rk8xx_reg_info {
35	38	uint min_uv;
36	39	uint step_uv;
...	...	@@ -76,6 +79,14 @@
76	79	};
77	80	#endif
78	81
	82	+static const u16 rk818_chrg_cur_input_array[] = {
	83	+ 450, 800, 850, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 2750, 3000
	84	+};
	85	+
	86	+static const uint rk818_chrg_shutdown_vsel_array[] = {
	87	+ 2780000, 2850000, 2920000, 2990000, 3060000, 3130000, 3190000, 3260000
	88	+};
	89	+
79	90	static const struct rk8xx_reg_info get_buck_reg(struct udevice pmic,
80	91	int num)
81	92	{
...	...	@@ -352,5 +363,28 @@
352	363	return ret;
353	364
354	365	return _buck_set_enable(pmic, buck, true);
	366	+}
	367	+
	368	+int rk818_spl_configure_usb_input_current(struct udevice *pmic, int current_ma)
	369	+{
	370	+ uint i;
	371	+
	372	+ for (i = 0; i < ARRAY_SIZE(rk818_chrg_cur_input_array); i++)
	373	+ if (current_ma <= rk818_chrg_cur_input_array[i])
	374	+ break;
	375	+
	376	+ return pmic_clrsetbits(pmic, REG_USB_CTRL, RK818_USB_ILIM_SEL_MASK, i);
	377	+}
	378	+
	379	+int rk818_spl_configure_usb_chrg_shutdown(struct udevice *pmic, int uvolt)
	380	+{
	381	+ uint i;
	382	+
	383	+ for (i = 0; i < ARRAY_SIZE(rk818_chrg_shutdown_vsel_array); i++)
	384	+ if (uvolt <= rk818_chrg_shutdown_vsel_array[i])
	385	+ break;
	386	+
	387	+ return pmic_clrsetbits(pmic, REG_USB_CTRL, RK818_USB_CHG_SD_VSEL_MASK,
	388	+ i);
355	389	}
...	...	@@ -189,6 +189,8 @@
189	189	};
190	190
191	191	int rk8xx_spl_configure_buck(struct udevice *pmic, int buck, int uvolt);
	192	+int rk818_spl_configure_usb_input_current(struct udevice *pmic, int current_ma);
	193	+int rk818_spl_configure_usb_chrg_shutdown(struct udevice *pmic, int uvolt);
192	194
193	195	#endif