| Message ID | 20210803084456.198-2-alistair@alistair23.me |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
On Tue, Aug 3, 2021 at 11:16 PM Lee Jones <lee.jones@linaro.org> wrote: > > On Tue, 03 Aug 2021, Alistair Francis wrote: > > > Initial support for the Silergy SY7636A Power Management chip. > > > > Signed-off-by: Alistair Francis <alistair@alistair23.me> > > --- > > drivers/mfd/Kconfig | 9 +++++ > > drivers/mfd/Makefile | 1 + > > drivers/mfd/sy7636a.c | 72 +++++++++++++++++++++++++++++++++++++ > > include/linux/mfd/sy7636a.h | 45 +++++++++++++++++++++++ > > 4 files changed, 127 insertions(+) > > create mode 100644 drivers/mfd/sy7636a.c > > create mode 100644 include/linux/mfd/sy7636a.h > > > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > > index 6a3fd2d75f96..b82208f0c79c 100644 > > --- a/drivers/mfd/Kconfig > > +++ b/drivers/mfd/Kconfig > > @@ -1352,6 +1352,15 @@ config MFD_SYSCON > > Select this option to enable accessing system control registers > > via regmap. > > > > +config MFD_SY7636A > > + tristate "Silergy SY7636A Power Management IC" > > + select MFD_CORE > > + select REGMAP_I2C > > + depends on I2C > > + help > > + Select this option to enable support for the Silergy SY7636A > > + Power Management IC. > > + > > config MFD_DAVINCI_VOICECODEC > > tristate > > select MFD_CORE > > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile > > index 8116c19d5fd4..cbe581e87fa9 100644 > > --- a/drivers/mfd/Makefile > > +++ b/drivers/mfd/Makefile > > @@ -266,6 +266,7 @@ obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o > > obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o > > obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o > > > > +obj-$(CONFIG_MFD_SY7636A) += sy7636a.o > > obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o > > obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o > > obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o > > diff --git a/drivers/mfd/sy7636a.c b/drivers/mfd/sy7636a.c > > new file mode 100644 > > index 000000000000..f3ff93c7395d > > --- /dev/null > > +++ b/drivers/mfd/sy7636a.c > > @@ -0,0 +1,72 @@ > > +// SPDX-License-Identifier: GPL-2.0+ > > +/* > > + * MFD parent driver for SY7636A chip > > + * > > + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ > > + * > > + * Authors: Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com> > > + * Alistair Francis <alistair@alistair23.me> > > + * > > + * Based on the lp87565 driver by Keerthy <j-keerthy@ti.com> > > + */ > > + > > +#include <linux/interrupt.h> > > +#include <linux/mfd/core.h> > > +#include <linux/module.h> > > +#include <linux/of_device.h> > > + > > +#include <linux/mfd/sy7636a.h> > > + > > +static const struct regmap_config sy7636a_regmap_config = { > > + .reg_bits = 8, > > + .val_bits = 8, > > +}; > > + > > +static const struct mfd_cell sy7636a_cells[] = { > > + { .name = "sy7636a-regulator", }, > > What kind of regulator is 'vcom'? LDO? DCDC? Both I guess: "SY7636A is a single-chip power management IC (PMIC) designed for electronic paper display (EPD) applications. The device supports panel sizes up to 9.7 inches and larger. The device integrates two high-efficiency DC-DC boost converters, which are boosted to 25V and -20V by two charge pumps to provide gate driver power for the panel. Two tracking LDOs create a ±15V source driver power supply that supports output currents up to 200mA. SY7636A also provides I2C interface control for specific panel requirements" Alistair > > > + { .name = "sy7636a-temperature", }, > > + { .name = "sy7636a-thermal", }, > > +}; > > -- > Lee Jones [李琼斯] > Senior Technical Lead - Developer Services > Linaro.org │ Open source software for Arm SoCs > Follow Linaro: Facebook | Twitter | Blog
On Wed, 04 Aug 2021, Alistair Francis wrote: > On Tue, Aug 3, 2021 at 11:16 PM Lee Jones <lee.jones@linaro.org> wrote: > > > > On Tue, 03 Aug 2021, Alistair Francis wrote: > > > > > Initial support for the Silergy SY7636A Power Management chip. > > > > > > Signed-off-by: Alistair Francis <alistair@alistair23.me> > > > --- > > > drivers/mfd/Kconfig | 9 +++++ > > > drivers/mfd/Makefile | 1 + > > > drivers/mfd/sy7636a.c | 72 +++++++++++++++++++++++++++++++++++++ > > > include/linux/mfd/sy7636a.h | 45 +++++++++++++++++++++++ > > > 4 files changed, 127 insertions(+) > > > create mode 100644 drivers/mfd/sy7636a.c > > > create mode 100644 include/linux/mfd/sy7636a.h > > > > > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > > > index 6a3fd2d75f96..b82208f0c79c 100644 > > > --- a/drivers/mfd/Kconfig > > > +++ b/drivers/mfd/Kconfig > > > @@ -1352,6 +1352,15 @@ config MFD_SYSCON > > > Select this option to enable accessing system control registers > > > via regmap. > > > > > > +config MFD_SY7636A > > > + tristate "Silergy SY7636A Power Management IC" > > > + select MFD_CORE > > > + select REGMAP_I2C > > > + depends on I2C > > > + help > > > + Select this option to enable support for the Silergy SY7636A > > > + Power Management IC. > > > + > > > config MFD_DAVINCI_VOICECODEC > > > tristate > > > select MFD_CORE > > > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile > > > index 8116c19d5fd4..cbe581e87fa9 100644 > > > --- a/drivers/mfd/Makefile > > > +++ b/drivers/mfd/Makefile > > > @@ -266,6 +266,7 @@ obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o > > > obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o > > > obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o > > > > > > +obj-$(CONFIG_MFD_SY7636A) += sy7636a.o > > > obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o > > > obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o > > > obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o > > > diff --git a/drivers/mfd/sy7636a.c b/drivers/mfd/sy7636a.c > > > new file mode 100644 > > > index 000000000000..f3ff93c7395d > > > --- /dev/null > > > +++ b/drivers/mfd/sy7636a.c > > > @@ -0,0 +1,72 @@ > > > +// SPDX-License-Identifier: GPL-2.0+ > > > +/* > > > + * MFD parent driver for SY7636A chip > > > + * > > > + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ > > > + * > > > + * Authors: Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com> > > > + * Alistair Francis <alistair@alistair23.me> > > > + * > > > + * Based on the lp87565 driver by Keerthy <j-keerthy@ti.com> > > > + */ > > > + > > > +#include <linux/interrupt.h> > > > +#include <linux/mfd/core.h> > > > +#include <linux/module.h> > > > +#include <linux/of_device.h> > > > + > > > +#include <linux/mfd/sy7636a.h> > > > + > > > +static const struct regmap_config sy7636a_regmap_config = { > > > + .reg_bits = 8, > > > + .val_bits = 8, > > > +}; > > > + > > > +static const struct mfd_cell sy7636a_cells[] = { > > > + { .name = "sy7636a-regulator", }, > > > > What kind of regulator is 'vcom'? LDO? DCDC? > > Both I guess: > > "SY7636A is a single-chip power management IC (PMIC) designed for > electronic paper display (EPD) applications. The device supports panel > sizes up to 9.7 inches and larger. The device integrates two > high-efficiency DC-DC boost converters, which are boosted to 25V and > -20V by two charge pumps to provide gate driver power for the panel. > Two tracking LDOs create a ±15V source driver power supply that > supports output currents up to 200mA. SY7636A also provides I2C > interface control for specific panel requirements" Is there a datasheet I could look at? -- Lee Jones [李琼斯] Senior Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog
On Wed, Aug 4, 2021 at 7:06 PM Lee Jones <lee.jones@linaro.org> wrote: > > On Wed, 04 Aug 2021, Alistair Francis wrote: > > > On Tue, Aug 3, 2021 at 11:16 PM Lee Jones <lee.jones@linaro.org> wrote: > > > > > > On Tue, 03 Aug 2021, Alistair Francis wrote: > > > > > > > Initial support for the Silergy SY7636A Power Management chip. > > > > > > > > Signed-off-by: Alistair Francis <alistair@alistair23.me> > > > > --- > > > > drivers/mfd/Kconfig | 9 +++++ > > > > drivers/mfd/Makefile | 1 + > > > > drivers/mfd/sy7636a.c | 72 +++++++++++++++++++++++++++++++++++++ > > > > include/linux/mfd/sy7636a.h | 45 +++++++++++++++++++++++ > > > > 4 files changed, 127 insertions(+) > > > > create mode 100644 drivers/mfd/sy7636a.c > > > > create mode 100644 include/linux/mfd/sy7636a.h > > > > > > > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > > > > index 6a3fd2d75f96..b82208f0c79c 100644 > > > > --- a/drivers/mfd/Kconfig > > > > +++ b/drivers/mfd/Kconfig > > > > @@ -1352,6 +1352,15 @@ config MFD_SYSCON > > > > Select this option to enable accessing system control registers > > > > via regmap. > > > > > > > > +config MFD_SY7636A > > > > + tristate "Silergy SY7636A Power Management IC" > > > > + select MFD_CORE > > > > + select REGMAP_I2C > > > > + depends on I2C > > > > + help > > > > + Select this option to enable support for the Silergy SY7636A > > > > + Power Management IC. > > > > + > > > > config MFD_DAVINCI_VOICECODEC > > > > tristate > > > > select MFD_CORE > > > > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile > > > > index 8116c19d5fd4..cbe581e87fa9 100644 > > > > --- a/drivers/mfd/Makefile > > > > +++ b/drivers/mfd/Makefile > > > > @@ -266,6 +266,7 @@ obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o > > > > obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o > > > > obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o > > > > > > > > +obj-$(CONFIG_MFD_SY7636A) += sy7636a.o > > > > obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o > > > > obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o > > > > obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o > > > > diff --git a/drivers/mfd/sy7636a.c b/drivers/mfd/sy7636a.c > > > > new file mode 100644 > > > > index 000000000000..f3ff93c7395d > > > > --- /dev/null > > > > +++ b/drivers/mfd/sy7636a.c > > > > @@ -0,0 +1,72 @@ > > > > +// SPDX-License-Identifier: GPL-2.0+ > > > > +/* > > > > + * MFD parent driver for SY7636A chip > > > > + * > > > > + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ > > > > + * > > > > + * Authors: Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com> > > > > + * Alistair Francis <alistair@alistair23.me> > > > > + * > > > > + * Based on the lp87565 driver by Keerthy <j-keerthy@ti.com> > > > > + */ > > > > + > > > > +#include <linux/interrupt.h> > > > > +#include <linux/mfd/core.h> > > > > +#include <linux/module.h> > > > > +#include <linux/of_device.h> > > > > + > > > > +#include <linux/mfd/sy7636a.h> > > > > + > > > > +static const struct regmap_config sy7636a_regmap_config = { > > > > + .reg_bits = 8, > > > > + .val_bits = 8, > > > > +}; > > > > + > > > > +static const struct mfd_cell sy7636a_cells[] = { > > > > + { .name = "sy7636a-regulator", }, > > > > > > What kind of regulator is 'vcom'? LDO? DCDC? > > > > Both I guess: > > > > "SY7636A is a single-chip power management IC (PMIC) designed for > > electronic paper display (EPD) applications. The device supports panel > > sizes up to 9.7 inches and larger. The device integrates two > > high-efficiency DC-DC boost converters, which are boosted to 25V and > > -20V by two charge pumps to provide gate driver power for the panel. > > Two tracking LDOs create a ±15V source driver power supply that > > supports output currents up to 200mA. SY7636A also provides I2C > > interface control for specific panel requirements" > > Is there a datasheet I could look at? I have managed to find this: https://www.silergy.com/cn/productsview/SY7636ARMC which is in Chinese. The datasheet is behind a login page unfortunately. Alistair > > -- > Lee Jones [李琼斯] > Senior Technical Lead - Developer Services > Linaro.org │ Open source software for Arm SoCs > Follow Linaro: Facebook | Twitter | Blog
On Wed, 04 Aug 2021, Alistair Francis wrote: > On Wed, Aug 4, 2021 at 7:06 PM Lee Jones <lee.jones@linaro.org> wrote: > > > > On Wed, 04 Aug 2021, Alistair Francis wrote: > > > > > On Tue, Aug 3, 2021 at 11:16 PM Lee Jones <lee.jones@linaro.org> wrote: > > > > > > > > On Tue, 03 Aug 2021, Alistair Francis wrote: > > > > > > > > > Initial support for the Silergy SY7636A Power Management chip. > > > > > > > > > > Signed-off-by: Alistair Francis <alistair@alistair23.me> > > > > > --- > > > > > drivers/mfd/Kconfig | 9 +++++ > > > > > drivers/mfd/Makefile | 1 + > > > > > drivers/mfd/sy7636a.c | 72 +++++++++++++++++++++++++++++++++++++ > > > > > include/linux/mfd/sy7636a.h | 45 +++++++++++++++++++++++ > > > > > 4 files changed, 127 insertions(+) > > > > > create mode 100644 drivers/mfd/sy7636a.c > > > > > create mode 100644 include/linux/mfd/sy7636a.h > > > > > > > > > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > > > > > index 6a3fd2d75f96..b82208f0c79c 100644 > > > > > --- a/drivers/mfd/Kconfig > > > > > +++ b/drivers/mfd/Kconfig > > > > > @@ -1352,6 +1352,15 @@ config MFD_SYSCON > > > > > Select this option to enable accessing system control registers > > > > > via regmap. > > > > > > > > > > +config MFD_SY7636A > > > > > + tristate "Silergy SY7636A Power Management IC" > > > > > + select MFD_CORE > > > > > + select REGMAP_I2C > > > > > + depends on I2C > > > > > + help > > > > > + Select this option to enable support for the Silergy SY7636A > > > > > + Power Management IC. > > > > > + > > > > > config MFD_DAVINCI_VOICECODEC > > > > > tristate > > > > > select MFD_CORE > > > > > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile > > > > > index 8116c19d5fd4..cbe581e87fa9 100644 > > > > > --- a/drivers/mfd/Makefile > > > > > +++ b/drivers/mfd/Makefile > > > > > @@ -266,6 +266,7 @@ obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o > > > > > obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o > > > > > obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o > > > > > > > > > > +obj-$(CONFIG_MFD_SY7636A) += sy7636a.o > > > > > obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o > > > > > obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o > > > > > obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o > > > > > diff --git a/drivers/mfd/sy7636a.c b/drivers/mfd/sy7636a.c > > > > > new file mode 100644 > > > > > index 000000000000..f3ff93c7395d > > > > > --- /dev/null > > > > > +++ b/drivers/mfd/sy7636a.c > > > > > @@ -0,0 +1,72 @@ > > > > > +// SPDX-License-Identifier: GPL-2.0+ > > > > > +/* > > > > > + * MFD parent driver for SY7636A chip > > > > > + * > > > > > + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ > > > > > + * > > > > > + * Authors: Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com> > > > > > + * Alistair Francis <alistair@alistair23.me> > > > > > + * > > > > > + * Based on the lp87565 driver by Keerthy <j-keerthy@ti.com> > > > > > + */ > > > > > + > > > > > +#include <linux/interrupt.h> > > > > > +#include <linux/mfd/core.h> > > > > > +#include <linux/module.h> > > > > > +#include <linux/of_device.h> > > > > > + > > > > > +#include <linux/mfd/sy7636a.h> > > > > > + > > > > > +static const struct regmap_config sy7636a_regmap_config = { > > > > > + .reg_bits = 8, > > > > > + .val_bits = 8, > > > > > +}; > > > > > + > > > > > +static const struct mfd_cell sy7636a_cells[] = { > > > > > + { .name = "sy7636a-regulator", }, > > > > > > > > What kind of regulator is 'vcom'? LDO? DCDC? > > > > > > Both I guess: > > > > > > "SY7636A is a single-chip power management IC (PMIC) designed for > > > electronic paper display (EPD) applications. The device supports panel > > > sizes up to 9.7 inches and larger. The device integrates two > > > high-efficiency DC-DC boost converters, which are boosted to 25V and > > > -20V by two charge pumps to provide gate driver power for the panel. > > > Two tracking LDOs create a ±15V source driver power supply that > > > supports output currents up to 200mA. SY7636A also provides I2C > > > interface control for specific panel requirements" > > > > Is there a datasheet I could look at? > > I have managed to find this: > > https://www.silergy.com/cn/productsview/SY7636ARMC > > which is in Chinese. The datasheet is behind a login page unfortunately. Where did the snippet above come from then? What documentation are you working to? -- Lee Jones [李琼斯] Senior Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog
On Wed, Aug 4, 2021 at 8:28 PM Lee Jones <lee.jones@linaro.org> wrote: > > On Wed, 04 Aug 2021, Alistair Francis wrote: > > > On Wed, Aug 4, 2021 at 7:06 PM Lee Jones <lee.jones@linaro.org> wrote: > > > > > > On Wed, 04 Aug 2021, Alistair Francis wrote: > > > > > > > On Tue, Aug 3, 2021 at 11:16 PM Lee Jones <lee.jones@linaro.org> wrote: > > > > > > > > > > On Tue, 03 Aug 2021, Alistair Francis wrote: > > > > > > > > > > > Initial support for the Silergy SY7636A Power Management chip. > > > > > > > > > > > > Signed-off-by: Alistair Francis <alistair@alistair23.me> > > > > > > --- > > > > > > drivers/mfd/Kconfig | 9 +++++ > > > > > > drivers/mfd/Makefile | 1 + > > > > > > drivers/mfd/sy7636a.c | 72 +++++++++++++++++++++++++++++++++++++ > > > > > > include/linux/mfd/sy7636a.h | 45 +++++++++++++++++++++++ > > > > > > 4 files changed, 127 insertions(+) > > > > > > create mode 100644 drivers/mfd/sy7636a.c > > > > > > create mode 100644 include/linux/mfd/sy7636a.h > > > > > > > > > > > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > > > > > > index 6a3fd2d75f96..b82208f0c79c 100644 > > > > > > --- a/drivers/mfd/Kconfig > > > > > > +++ b/drivers/mfd/Kconfig > > > > > > @@ -1352,6 +1352,15 @@ config MFD_SYSCON > > > > > > Select this option to enable accessing system control registers > > > > > > via regmap. > > > > > > > > > > > > +config MFD_SY7636A > > > > > > + tristate "Silergy SY7636A Power Management IC" > > > > > > + select MFD_CORE > > > > > > + select REGMAP_I2C > > > > > > + depends on I2C > > > > > > + help > > > > > > + Select this option to enable support for the Silergy SY7636A > > > > > > + Power Management IC. > > > > > > + > > > > > > config MFD_DAVINCI_VOICECODEC > > > > > > tristate > > > > > > select MFD_CORE > > > > > > diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile > > > > > > index 8116c19d5fd4..cbe581e87fa9 100644 > > > > > > --- a/drivers/mfd/Makefile > > > > > > +++ b/drivers/mfd/Makefile > > > > > > @@ -266,6 +266,7 @@ obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o > > > > > > obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o > > > > > > obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o > > > > > > > > > > > > +obj-$(CONFIG_MFD_SY7636A) += sy7636a.o > > > > > > obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o > > > > > > obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o > > > > > > obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o > > > > > > diff --git a/drivers/mfd/sy7636a.c b/drivers/mfd/sy7636a.c > > > > > > new file mode 100644 > > > > > > index 000000000000..f3ff93c7395d > > > > > > --- /dev/null > > > > > > +++ b/drivers/mfd/sy7636a.c > > > > > > @@ -0,0 +1,72 @@ > > > > > > +// SPDX-License-Identifier: GPL-2.0+ > > > > > > +/* > > > > > > + * MFD parent driver for SY7636A chip > > > > > > + * > > > > > > + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ > > > > > > + * > > > > > > + * Authors: Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com> > > > > > > + * Alistair Francis <alistair@alistair23.me> > > > > > > + * > > > > > > + * Based on the lp87565 driver by Keerthy <j-keerthy@ti.com> > > > > > > + */ > > > > > > + > > > > > > +#include <linux/interrupt.h> > > > > > > +#include <linux/mfd/core.h> > > > > > > +#include <linux/module.h> > > > > > > +#include <linux/of_device.h> > > > > > > + > > > > > > +#include <linux/mfd/sy7636a.h> > > > > > > + > > > > > > +static const struct regmap_config sy7636a_regmap_config = { > > > > > > + .reg_bits = 8, > > > > > > + .val_bits = 8, > > > > > > +}; > > > > > > + > > > > > > +static const struct mfd_cell sy7636a_cells[] = { > > > > > > + { .name = "sy7636a-regulator", }, > > > > > > > > > > What kind of regulator is 'vcom'? LDO? DCDC? > > > > > > > > Both I guess: > > > > > > > > "SY7636A is a single-chip power management IC (PMIC) designed for > > > > electronic paper display (EPD) applications. The device supports panel > > > > sizes up to 9.7 inches and larger. The device integrates two > > > > high-efficiency DC-DC boost converters, which are boosted to 25V and > > > > -20V by two charge pumps to provide gate driver power for the panel. > > > > Two tracking LDOs create a ±15V source driver power supply that > > > > supports output currents up to 200mA. SY7636A also provides I2C > > > > interface control for specific panel requirements" > > > > > > Is there a datasheet I could look at? > > > > I have managed to find this: > > > > https://www.silergy.com/cn/productsview/SY7636ARMC > > > > which is in Chinese. The datasheet is behind a login page unfortunately. > > Where did the snippet above come from then? It's the translation of the above link. > > What documentation are you working to? It's based on the vendor driver and then testing on hardware. Alistair > > -- > Lee Jones [李琼斯] > Senior Technical Lead - Developer Services > Linaro.org │ Open source software for Arm SoCs > Follow Linaro: Facebook | Twitter | Blog
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 6a3fd2d75f96..b82208f0c79c 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1352,6 +1352,15 @@ config MFD_SYSCON Select this option to enable accessing system control registers via regmap. +config MFD_SY7636A + tristate "Silergy SY7636A Power Management IC" + select MFD_CORE + select REGMAP_I2C + depends on I2C + help + Select this option to enable support for the Silergy SY7636A + Power Management IC. + config MFD_DAVINCI_VOICECODEC tristate select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 8116c19d5fd4..cbe581e87fa9 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -266,6 +266,7 @@ obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o +obj-$(CONFIG_MFD_SY7636A) += sy7636a.o obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o diff --git a/drivers/mfd/sy7636a.c b/drivers/mfd/sy7636a.c new file mode 100644 index 000000000000..f3ff93c7395d --- /dev/null +++ b/drivers/mfd/sy7636a.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * MFD parent driver for SY7636A chip + * + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ + * + * Authors: Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com> + * Alistair Francis <alistair@alistair23.me> + * + * Based on the lp87565 driver by Keerthy <j-keerthy@ti.com> + */ + +#include <linux/interrupt.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/of_device.h> + +#include <linux/mfd/sy7636a.h> + +static const struct regmap_config sy7636a_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct mfd_cell sy7636a_cells[] = { + { .name = "sy7636a-regulator", }, + { .name = "sy7636a-temperature", }, + { .name = "sy7636a-thermal", }, +}; + +static int sy7636a_probe(struct i2c_client *client) +{ + struct sy7636a *ddata; + int ret; + + ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL); + if (!ddata) + return -ENOMEM; + + ddata->regmap = devm_regmap_init_i2c(client, &sy7636a_regmap_config); + if (IS_ERR(ddata->regmap)) { + ret = PTR_ERR(ddata->regmap); + dev_err(&client->dev, + "Failed to initialize register map: %d\n", ret); + return ret; + } + + i2c_set_clientdata(client, ddata); + + return devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO, + sy7636a_cells, ARRAY_SIZE(sy7636a_cells), + NULL, 0, NULL); +} + +static const struct of_device_id of_sy7636a_match_table[] = { + { .compatible = "silergy,sy7636a", }, + {} +}; +MODULE_DEVICE_TABLE(of, of_sy7636a_match_table); + +static struct i2c_driver sy7636a_driver = { + .driver = { + .name = "sy7636a", + .of_match_table = of_sy7636a_match_table, + }, + .probe_new = sy7636a_probe, +}; +module_i2c_driver(sy7636a_driver); + +MODULE_AUTHOR("Lars Ivar Miljeteig <lars.ivar.miljeteig@remarkable.com>"); +MODULE_DESCRIPTION("Silergy SY7636A Multi-Function Device Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/sy7636a.h b/include/linux/mfd/sy7636a.h new file mode 100644 index 000000000000..5e9c537fee45 --- /dev/null +++ b/include/linux/mfd/sy7636a.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Functions to access SY3686A power management chip. + * + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ + */ + +#ifndef __MFD_SY7636A_H +#define __MFD_SY7636A_H + +#include <linux/i2c.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> + +#define SY7636A_REG_OPERATION_MODE_CRL 0x00 +#define SY7636A_OPERATION_MODE_CRL_VCOMCTL BIT(6) +#define SY7636A_OPERATION_MODE_CRL_ONOFF BIT(7) +#define SY7636A_REG_VCOM_ADJUST_CTRL_L 0x01 +#define SY7636A_REG_VCOM_ADJUST_CTRL_H 0x02 +#define SY7636A_REG_VCOM_ADJUST_CTRL_MASK 0x01ff +#define SY7636A_REG_VLDO_VOLTAGE_ADJULST_CTRL 0x03 +#define SY7636A_REG_POWER_ON_DELAY_TIME 0x06 +#define SY7636A_REG_FAULT_FLAG 0x07 +#define SY7636A_FAULT_FLAG_PG BIT(0) +#define SY7636A_REG_TERMISTOR_READOUT 0x08 + +#define SY7636A_REG_MAX 0x08 + +#define VCOM_MIN 0 +#define VCOM_MAX 5000 + +#define VCOM_ADJUST_CTRL_MASK 0x1ff +// Used to shift the high byte +#define VCOM_ADJUST_CTRL_SHIFT 8 +// Used to scale from VCOM_ADJUST_CTRL to mv +#define VCOM_ADJUST_CTRL_SCAL 10000 + +#define FAULT_FLAG_SHIFT 1 + +struct sy7636a { + struct regmap *regmap; +}; + +#endif /* __LINUX_MFD_SY7636A_H */
Initial support for the Silergy SY7636A Power Management chip. Signed-off-by: Alistair Francis <alistair@alistair23.me> --- drivers/mfd/Kconfig | 9 +++++ drivers/mfd/Makefile | 1 + drivers/mfd/sy7636a.c | 72 +++++++++++++++++++++++++++++++++++++ include/linux/mfd/sy7636a.h | 45 +++++++++++++++++++++++ 4 files changed, 127 insertions(+) create mode 100644 drivers/mfd/sy7636a.c create mode 100644 include/linux/mfd/sy7636a.h