mfd: rohm-bd71828: Support ROHM BD72720

The ROHM BD72720 is a power management IC which continues the BD71828
family of PMICs. Similarly to the BD71815 and BD71828, the BD72720
integrates regulators, charger, RTC, clock gate and GPIOs.

The main difference to the earlier PMICs is that the BD72720 has two
different I2C slave addresses. In addition to the registers behind the
'main I2C address', most of the charger (and to some extent LED) control
is done via registers behind a 'secondary I2C slave address', 0x4c.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://patch.msgid.link/c7b3f1b25616a0add21cea38019e50a89873b6ac.1765804226.git.mazziesaccount@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>

Author: M-Vaittinen

drivers/mfd/Kconfig

@@ -2217,20 +2217,22 @@ config MFD_ROHM_BD718XX
 	  and emergency shut down as well as 32,768KHz clock output.
 
 config MFD_ROHM_BD71828
-	tristate "ROHM BD71828 and BD71815 Power Management IC"
+	tristate "ROHM BD718[15/28/79], BD72720 and BD73900 PMICs"
 	depends on I2C=y
 	depends on OF
 	select REGMAP_I2C
 	select REGMAP_IRQ
 	select MFD_CORE
 	help
-	  Select this option to get support for the ROHM BD71828 and BD71815
-	  Power Management ICs. BD71828GW and BD71815AGW are single-chip power
-	  management ICs mainly for battery-powered portable devices.
-	  The BD71828 integrates 7 buck converters and 7 LDOs. The BD71815
-	  has 5 bucks, 7 LDOs, and a boost for driving LEDs. Both ICs provide
-	  also a single-cell linear charger, a Coulomb counter, a real-time
-	  clock (RTC), GPIOs and a 32.768 kHz clock gate.
+	  Select this option to get support for the ROHM BD71815, BD71828,
+	  BD71879, BD72720 and BD73900 Power Management ICs (PMICs). These are
+	  single-chip Power Management ICs (PMIC), mainly for battery-powered
+	  portable devices.
+	  The BD71815 has 5 bucks, 7 LDOs, and a boost for driving LEDs.
+	  The BD718[28/79] have 7 buck converters and 7 LDOs.
+	  The BD72720 and the BD73900 have 10 bucks and 11 LDOs.
+	  All ICs provide a single-cell linear charger, a Coulomb counter,
+	  a Real-Time Clock (RTC), GPIOs and a 32.768 kHz clock gate.
 
 config MFD_ROHM_BD957XMUF
 	tristate "ROHM BD9576MUF and BD9573MUF Power Management ICs"