* [PATCH V4 1/3] mfd: add support for ams AS3722 PMIC
2013-10-02 15:50 [PATCH V4 0/3] Add AMS AS3722 mfd, pincontrol, regulator and RTC driver Laxman Dewangan
@ 2013-10-02 15:50 ` Laxman Dewangan
[not found] ` <1380729030-25896-2-git-send-email-ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2013-10-08 20:38 ` Stephen Warren
2013-10-02 15:50 ` [PATCH V5 2/3] pincntrl: add support for ams AS3722 pin control driver Laxman Dewangan
2013-10-02 15:50 ` [PATCH V4 3/3] drivers/rtc/rtc-as3722: add RTC driver Laxman Dewangan
2 siblings, 2 replies; 9+ messages in thread
From: Laxman Dewangan @ 2013-10-02 15:50 UTC (permalink / raw)
To: lee.jones, sameo, broonie, linus.walleij, akpm
Cc: devicetree, linux-doc, linux-kernel, linux-gpio, rtc-linux,
rob.herring, mark.rutland, pawel.moll, swarren, rob,
ijc+devicetree, grant.likely, Laxman Dewangan, Florian Lobmaier
The ams AS3722 is a compact system PMU suitable for mobile phones,
tablets etc. It has 4 DC/DC step-down regulators, 3 DC/DC step-down
controller, 11 LDOs, RTC, automatic battery, temperature and
over-current monitoring, 8 GPIOs, ADC and a watchdog.
Add MFD core driver for the AS3722 to support core functionality.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Florian Lobmaier <florian.lobmaier@ams.com>
---
Changes from V1:
- Remove compatible string from DT for subnode.
- Nit cleanups in driver and use module_i2c_driver
Changes from V2:
- Change DT file to reflect the changes in gpio/pincntrl driver.
Now there is no extra subnode.
Changes from V3:
- Combine DT of pincontrol and regulator to mfd.
- Nits cleanups.
- AMS to ams.
Documentation/devicetree/bindings/mfd/as3722.txt | 174 +++++++++
drivers/mfd/Kconfig | 12 +
drivers/mfd/Makefile | 1 +
drivers/mfd/as3722.c | 449 ++++++++++++++++++++++
include/linux/mfd/as3722.h | 423 ++++++++++++++++++++
5 files changed, 1059 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mfd/as3722.txt
create mode 100644 drivers/mfd/as3722.c
create mode 100644 include/linux/mfd/as3722.h
diff --git a/Documentation/devicetree/bindings/mfd/as3722.txt b/Documentation/devicetree/bindings/mfd/as3722.txt
new file mode 100644
index 0000000..885ca4c
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/as3722.txt
@@ -0,0 +1,174 @@
+* ams AS3722 Power management IC.
+
+Required properties:
+-------------------
+- compatible: Must be "ams,as3722".
+- reg: I2C device address.
+- interrupt-controller: AS3722 has internal interrupt controller which takes the
+ interrupt request from internal sub-blocks like RTC, regulators, GPIOs as well
+ as external input.
+- #interrupt-cells: Should be set to 2 for IRQ number and flags.
+ The first cell is the IRQ number.
+ The second cell is the flags, encoded as the trigger masks from binding document
+ interrupts.txt, using dt-bindings/irq.
+
+Optional submodule and their properties:
+---------------------------------------
+
+Pinmux and GPIO:
+---------------
+Device has 8 GPIO pins which can be configured as GPIO as well as the special IO
+functions.
+
+Please refer to pinctrl-bindings.txt in this directory for details of the
+common pinctrl bindings used by client devices, including the meaning of the
+phrase "pin configuration node".
+
+Following are properties which is needed if GPIO and pinmux functionality
+is required:
+- gpio-controller: Marks the device node as a GPIO controller.
+- #gpio-cells: Number of GPIO cells. Refer to binding document gpio/gpio.txt
+- pinctrl-names: A pinctrl state named "default" must be defined, using the
+ bindings in pinctrl/pinctrl-binding.txt.
+- pinctrl[0...n]: Nodes for pin control to represents state 0 to state n.
+ Each of these nodes contains different subnodes to represents
+ some desired configuration for a list of pins. This configuration can
+ include the mux function to select on those pin(s), and various pin
+ configuration parameters, such as pull-up, open drain.
+
+Each subnode have following properties:
+Required properties:
+ pins: List of pins. Valid options for pins properties are
+ gpio0, gpio1, gpio2, gpio3, gpio4, gpio5, gpio6, gpio7
+
+Optional properties:
+ Optional properties are
+ function, bias-disable, bias-pull-up, bias-pull-down,
+ bias-high-impedance, drive-open-drain.
+
+ Valid options for funtion properties are:
+ gpio, interrupt-out, gpio-in-interrupt,
+ vsup-vbat-low-undebounce-out, vsup-vbat-low-debounce-out,
+ voltage-in-standby, oc-pg-sd0, oc-pg-sd6, powergood-out,
+ pwm-in, pwm-out, clk32k-out, watchdog-in, soft-reset-in
+
+Regulators:
+-----------
+Device has multiple DCDC and LDOs. The node "regulators" is require if regulator
+functionality is needed.
+
+Following are properties of regulator subnode.
+
+Optional properties:
+-------------------
+The input supply of regulators are the optional properties on the
+regulator node. The input supply of these regulators are provided
+through following properties:
+vsup-sd2-supply: Input supply for SD2.
+vsup-sd3-supply: Input supply for SD3.
+vsup-sd4-supply: Input supply for SD4.
+vsup-sd5-supply: Input supply for SD5.
+vin-ldo0-supply: Input supply for LDO0.
+vin-ldo1-6-supply: Input supply for LDO1 and LDO6.
+vin-ldo2-5-7-supply: Input supply for LDO2, LDO5 and LDO7.
+vin-ldo3-4-supply: Input supply for LDO3 and LDO4.
+vin-ldo9-10-supply: Input supply for LDO9 and LDO10.
+vin-ldo11-supply: Input supply for LDO11.
+
+Optional sub nodes:
+-----------------
+ The subnodes name is the name of regulator and it must be one of:
+ sd[0-6], ldo[0-7], ldo[9-11]
+
+ Each sub-node should contain the constraints and initialization
+ information for that regulator. See regulator.txt for a description
+ of standard properties for these sub-nodes.
+ Additional custom properties are listed below.
+ ams,ext-control: External control of the rail. The option of
+ this properties will tell which external input is
+ controlling this rail. Valid values are 0, 1, 2 ad 3.
+ 0: There is no external control of this rail.
+ 1: Rail is controlled by ENABLE1 input pin.
+ 2: Rail is controlled by ENABLE2 input pin.
+ 3: Rail is controlled by ENABLE3 input pin.
+ ams,enable-tracking: Enable tracking with SD1, only supported
+ by LDO3.
+
+Example:
+--------
+ams3722 {
+ compatible = "ams,as3722";
+ reg = <0x48>;
+
+ interrupt-parent = <&intc>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&as3722_default>;
+
+ as3722_default: pinmux {
+ gpio0 {
+ pins = "gpio0";
+ function = "gpio";
+ bias-pull-down;
+ };
+
+ gpio1_2_4_7 {
+ pins = "gpio1", "gpio2", "gpio4", "gpio7";
+ function = "gpio";
+ bias-pull-up;
+ };
+
+ gpio5 {
+ pins = "gpio5";
+ function = "clk32k_out";
+ };
+ }
+
+ regulators {
+ vsup-sd2-supply = <...>;
+ ...
+
+ sd0 {
+ regulator-name = "vdd_cpu";
+ regulator-min-microvolt = <700000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-always-on;
+ ams,ext-control = <2>;
+ };
+
+ sd1 {
+ regulator-name = "vdd_core";
+ regulator-min-microvolt = <700000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-always-on;
+ ams,ext-control = <1>;
+ };
+
+ sd2 {
+ regulator-name = "vddio_ddr";
+ regulator-min-microvolt = <1350000>;
+ regulator-max-microvolt = <1350000>;
+ regulator-always-on;
+ };
+
+ sd4 {
+ regulator-name = "avdd-hdmi-pex";
+ regulator-min-microvolt = <1050000>;
+ regulator-max-microvolt = <1050000>;
+ regulator-always-on;
+ };
+
+ sd5 {
+ regulator-name = "vdd-1v8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+ ....
+ };
+};
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index d078fe4..b7c74a7 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -27,6 +27,18 @@ config MFD_AS3711
help
Support for the AS3711 PMIC from AMS
+config MFD_AS3722
+ bool "ams AS3722 Power Management IC"
+ select MFD_CORE
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ depends on I2C && OF
+ help
+ The ams AS3722 is a compact system PMU suitable for mobile phones,
+ tablets etc. It has 4 DC/DC step-down regulators, 3 DC/DC step-down
+ controllers, 11 LDOs, RTC, automatic battery, temperature and
+ over current monitoring, GPIOs, ADC and a watchdog.
+
config PMIC_ADP5520
bool "Analog Devices ADP5520/01 MFD PMIC Core Support"
depends on I2C=y
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 656cec9..8a28dc9 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -162,4 +162,5 @@ obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o
obj-$(CONFIG_VEXPRESS_CONFIG) += vexpress-config.o vexpress-sysreg.o
obj-$(CONFIG_MFD_RETU) += retu-mfd.o
obj-$(CONFIG_MFD_AS3711) += as3711.o
+obj-$(CONFIG_MFD_AS3722) += as3722.o
obj-$(CONFIG_MFD_STW481X) += stw481x.o
diff --git a/drivers/mfd/as3722.c b/drivers/mfd/as3722.c
new file mode 100644
index 0000000..cd8ee59
--- /dev/null
+++ b/drivers/mfd/as3722.c
@@ -0,0 +1,449 @@
+/*
+ * Core driver for ams AS3722 PMICs
+ *
+ * Copyright (C) 2013 AMS AG
+ * Copyright (c) 2013, NVIDIA Corporation. All rights reserved.
+ *
+ * Author: Florian Lobmaier <florian.lobmaier@ams.com>
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/as3722.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define AS3722_DEVICE_ID 0x0C
+
+static const struct resource as3722_rtc_resource[] = {
+ {
+ .name = "as3722-rtc-alarm",
+ .start = AS3722_IRQ_RTC_ALARM,
+ .end = AS3722_IRQ_RTC_ALARM,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static const struct resource as3722_adc_resource[] = {
+ {
+ .name = "as3722-adc",
+ .start = AS3722_IRQ_ADC,
+ .end = AS3722_IRQ_ADC,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct mfd_cell as3722_devs[] = {
+ {
+ .name = "as3722-pinctrl",
+ },
+ {
+ .name = "as3722-regulator",
+ },
+ {
+ .name = "as3722-rtc",
+ .num_resources = ARRAY_SIZE(as3722_rtc_resource),
+ .resources = as3722_rtc_resource,
+ },
+ {
+ .name = "as3722-adc",
+ .num_resources = ARRAY_SIZE(as3722_adc_resource),
+ .resources = as3722_adc_resource,
+ },
+ {
+ .name = "as3722-power-off",
+ },
+};
+
+static const struct regmap_irq as3722_irqs[] = {
+ /* INT1 IRQs */
+ [AS3722_IRQ_LID] = {
+ .mask = AS3722_INTERRUPT_MASK1_LID,
+ },
+ [AS3722_IRQ_ACOK] = {
+ .mask = AS3722_INTERRUPT_MASK1_ACOK,
+ },
+ [AS3722_IRQ_ENABLE1] = {
+ .mask = AS3722_INTERRUPT_MASK1_ENABLE1,
+ },
+ [AS3722_IRQ_OCCUR_ALARM_SD0] = {
+ .mask = AS3722_INTERRUPT_MASK1_OCURR_ALARM_SD0,
+ },
+ [AS3722_IRQ_ONKEY_LONG_PRESS] = {
+ .mask = AS3722_INTERRUPT_MASK1_ONKEY_LONG,
+ },
+ [AS3722_IRQ_ONKEY] = {
+ .mask = AS3722_INTERRUPT_MASK1_ONKEY,
+ },
+ [AS3722_IRQ_OVTMP] = {
+ .mask = AS3722_INTERRUPT_MASK1_OVTMP,
+ },
+ [AS3722_IRQ_LOWBAT] = {
+ .mask = AS3722_INTERRUPT_MASK1_LOWBAT,
+ },
+
+ /* INT2 IRQs */
+ [AS3722_IRQ_SD0_LV] = {
+ .mask = AS3722_INTERRUPT_MASK2_SD0_LV,
+ .reg_offset = 1,
+ },
+ [AS3722_IRQ_SD1_LV] = {
+ .mask = AS3722_INTERRUPT_MASK2_SD1_LV,
+ .reg_offset = 1,
+ },
+ [AS3722_IRQ_SD2_LV] = {
+ .mask = AS3722_INTERRUPT_MASK2_SD2345_LV,
+ .reg_offset = 1,
+ },
+ [AS3722_IRQ_PWM1_OV_PROT] = {
+ .mask = AS3722_INTERRUPT_MASK2_PWM1_OV_PROT,
+ .reg_offset = 1,
+ },
+ [AS3722_IRQ_PWM2_OV_PROT] = {
+ .mask = AS3722_INTERRUPT_MASK2_PWM2_OV_PROT,
+ .reg_offset = 1,
+ },
+ [AS3722_IRQ_ENABLE2] = {
+ .mask = AS3722_INTERRUPT_MASK2_ENABLE2,
+ .reg_offset = 1,
+ },
+ [AS3722_IRQ_SD6_LV] = {
+ .mask = AS3722_INTERRUPT_MASK2_SD6_LV,
+ .reg_offset = 1,
+ },
+ [AS3722_IRQ_RTC_REP] = {
+ .mask = AS3722_INTERRUPT_MASK2_RTC_REP,
+ .reg_offset = 1,
+ },
+
+ /* INT3 IRQs */
+ [AS3722_IRQ_RTC_ALARM] = {
+ .mask = AS3722_INTERRUPT_MASK3_RTC_ALARM,
+ .reg_offset = 2,
+ },
+ [AS3722_IRQ_GPIO1] = {
+ .mask = AS3722_INTERRUPT_MASK3_GPIO1,
+ .reg_offset = 2,
+ },
+ [AS3722_IRQ_GPIO2] = {
+ .mask = AS3722_INTERRUPT_MASK3_GPIO2,
+ .reg_offset = 2,
+ },
+ [AS3722_IRQ_GPIO3] = {
+ .mask = AS3722_INTERRUPT_MASK3_GPIO3,
+ .reg_offset = 2,
+ },
+ [AS3722_IRQ_GPIO4] = {
+ .mask = AS3722_INTERRUPT_MASK3_GPIO4,
+ .reg_offset = 2,
+ },
+ [AS3722_IRQ_GPIO5] = {
+ .mask = AS3722_INTERRUPT_MASK3_GPIO5,
+ .reg_offset = 2,
+ },
+ [AS3722_IRQ_WATCHDOG] = {
+ .mask = AS3722_INTERRUPT_MASK3_WATCHDOG,
+ .reg_offset = 2,
+ },
+ [AS3722_IRQ_ENABLE3] = {
+ .mask = AS3722_INTERRUPT_MASK3_ENABLE3,
+ .reg_offset = 2,
+ },
+
+ /* INT4 IRQs */
+ [AS3722_IRQ_TEMP_SD0_SHUTDOWN] = {
+ .mask = AS3722_INTERRUPT_MASK4_TEMP_SD0_SHUTDOWN,
+ .reg_offset = 3,
+ },
+ [AS3722_IRQ_TEMP_SD1_SHUTDOWN] = {
+ .mask = AS3722_INTERRUPT_MASK4_TEMP_SD1_SHUTDOWN,
+ .reg_offset = 3,
+ },
+ [AS3722_IRQ_TEMP_SD2_SHUTDOWN] = {
+ .mask = AS3722_INTERRUPT_MASK4_TEMP_SD6_SHUTDOWN,
+ .reg_offset = 3,
+ },
+ [AS3722_IRQ_TEMP_SD0_ALARM] = {
+ .mask = AS3722_INTERRUPT_MASK4_TEMP_SD0_ALARM,
+ .reg_offset = 3,
+ },
+ [AS3722_IRQ_TEMP_SD1_ALARM] = {
+ .mask = AS3722_INTERRUPT_MASK4_TEMP_SD1_ALARM,
+ .reg_offset = 3,
+ },
+ [AS3722_IRQ_TEMP_SD6_ALARM] = {
+ .mask = AS3722_INTERRUPT_MASK4_TEMP_SD6_ALARM,
+ .reg_offset = 3,
+ },
+ [AS3722_IRQ_OCCUR_ALARM_SD6] = {
+ .mask = AS3722_INTERRUPT_MASK4_OCCUR_ALARM_SD6,
+ .reg_offset = 3,
+ },
+ [AS3722_IRQ_ADC] = {
+ .mask = AS3722_INTERRUPT_MASK4_ADC,
+ .reg_offset = 3,
+ },
+};
+
+static const struct regmap_irq_chip as3722_irq_chip = {
+ .name = "as3722",
+ .irqs = as3722_irqs,
+ .num_irqs = ARRAY_SIZE(as3722_irqs),
+ .num_regs = 4,
+ .status_base = AS3722_INTERRUPT_STATUS1_REG,
+ .mask_base = AS3722_INTERRUPT_MASK1_REG,
+};
+
+static int as3722_check_device_id(struct as3722 *as3722)
+{
+ u32 val;
+ int ret;
+
+ /* Check that this is actually a AS3722 */
+ ret = as3722_read(as3722, AS3722_ASIC_ID1_REG, &val);
+ if (ret < 0) {
+ dev_err(as3722->dev, "ASIC_ID1 read failed: %d\n", ret);
+ return ret;
+ }
+
+ if (val != AS3722_DEVICE_ID) {
+ dev_err(as3722->dev, "Device is not AS3722, ID is 0x%x\n", val);
+ return -ENODEV;
+ }
+
+ ret = as3722_read(as3722, AS3722_ASIC_ID2_REG, &val);
+ if (ret < 0) {
+ dev_err(as3722->dev, "ASIC_ID2 read failed: %d\n", ret);
+ return ret;
+ }
+
+ dev_info(as3722->dev, "AS3722 with revision 0x%x found\n", val);
+ return 0;
+}
+
+static int as3722_configure_pullups(struct as3722 *as3722)
+{
+ int ret;
+ u32 val = 0;
+
+ if (as3722->en_intern_int_pullup)
+ val |= AS3722_INT_PULL_UP;
+ if (as3722->en_intern_i2c_pullup)
+ val |= AS3722_I2C_PULL_UP;
+
+ ret = as3722_update_bits(as3722, AS3722_IOVOLTAGE_REG,
+ AS3722_INT_PULL_UP | AS3722_I2C_PULL_UP, val);
+ if (ret < 0)
+ dev_err(as3722->dev, "IOVOLTAGE_REG update failed: %d\n", ret);
+ return ret;
+}
+
+static const struct regmap_range as3722_readable_ranges[] = {
+ regmap_reg_range(AS3722_SD0_VOLTAGE_REG, AS3722_SD6_VOLTAGE_REG),
+ regmap_reg_range(AS3722_GPIO0_CONTROL_REG, AS3722_LDO7_VOLTAGE_REG),
+ regmap_reg_range(AS3722_LDO9_VOLTAGE_REG, AS3722_REG_SEQU_MOD3_REG),
+ regmap_reg_range(AS3722_SD_PHSW_CTRL_REG, AS3722_PWM_CONTROL_H_REG),
+ regmap_reg_range(AS3722_WATCHDOG_TIMER_REG, AS3722_WATCHDOG_TIMER_REG),
+ regmap_reg_range(AS3722_WATCHDOG_SOFTWARE_SIGNAL_REG,
+ AS3722_BATTERY_VOLTAGE_MONITOR2_REG),
+ regmap_reg_range(AS3722_SD_CONTROL_REG, AS3722_PWM_VCONTROL4_REG),
+ regmap_reg_range(AS3722_BB_CHARGER_REG, AS3722_SRAM_REG),
+ regmap_reg_range(AS3722_RTC_ACCESS_REG, AS3722_RTC_ACCESS_REG),
+ regmap_reg_range(AS3722_RTC_STATUS_REG, AS3722_TEMP_STATUS_REG),
+ regmap_reg_range(AS3722_ADC0_CONTROL_REG, AS3722_ADC_CONFIGURATION_REG),
+ regmap_reg_range(AS3722_ASIC_ID1_REG, AS3722_ASIC_ID2_REG),
+ regmap_reg_range(AS3722_LOCK_REG, AS3722_LOCK_REG),
+};
+
+static const struct regmap_access_table as3722_readable_table = {
+ .yes_ranges = as3722_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(as3722_readable_ranges),
+};
+
+static const struct regmap_range as3722_writable_ranges[] = {
+ regmap_reg_range(AS3722_SD0_VOLTAGE_REG, AS3722_SD6_VOLTAGE_REG),
+ regmap_reg_range(AS3722_GPIO0_CONTROL_REG, AS3722_LDO7_VOLTAGE_REG),
+ regmap_reg_range(AS3722_LDO9_VOLTAGE_REG, AS3722_GPIO_SIGNAL_OUT_REG),
+ regmap_reg_range(AS3722_REG_SEQU_MOD1_REG, AS3722_REG_SEQU_MOD3_REG),
+ regmap_reg_range(AS3722_SD_PHSW_CTRL_REG, AS3722_PWM_CONTROL_H_REG),
+ regmap_reg_range(AS3722_WATCHDOG_TIMER_REG, AS3722_WATCHDOG_TIMER_REG),
+ regmap_reg_range(AS3722_WATCHDOG_SOFTWARE_SIGNAL_REG,
+ AS3722_BATTERY_VOLTAGE_MONITOR2_REG),
+ regmap_reg_range(AS3722_SD_CONTROL_REG, AS3722_PWM_VCONTROL4_REG),
+ regmap_reg_range(AS3722_BB_CHARGER_REG, AS3722_SRAM_REG),
+ regmap_reg_range(AS3722_INTERRUPT_MASK1_REG, AS3722_TEMP_STATUS_REG),
+ regmap_reg_range(AS3722_ADC0_CONTROL_REG, AS3722_ADC1_CONTROL_REG),
+ regmap_reg_range(AS3722_ADC1_THRESHOLD_HI_MSB_REG,
+ AS3722_ADC_CONFIGURATION_REG),
+ regmap_reg_range(AS3722_LOCK_REG, AS3722_LOCK_REG),
+};
+
+static const struct regmap_access_table as3722_writable_table = {
+ .yes_ranges = as3722_writable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(as3722_writable_ranges),
+};
+
+static const struct regmap_range as3722_cacheable_ranges[] = {
+ regmap_reg_range(AS3722_SD0_VOLTAGE_REG, AS3722_LDO11_VOLTAGE_REG),
+ regmap_reg_range(AS3722_SD_CONTROL_REG, AS3722_LDOCONTROL1_REG),
+};
+
+static const struct regmap_access_table as3722_volatile_table = {
+ .no_ranges = as3722_cacheable_ranges,
+ .n_no_ranges = ARRAY_SIZE(as3722_cacheable_ranges),
+};
+
+const struct regmap_config as3722_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = AS3722_MAX_REGISTER,
+ .cache_type = REGCACHE_RBTREE,
+ .rd_table = &as3722_readable_table,
+ .wr_table = &as3722_writable_table,
+ .volatile_table = &as3722_volatile_table,
+};
+
+static int as3722_i2c_of_probe(struct i2c_client *i2c,
+ struct as3722 *as3722)
+{
+ struct device_node *np = i2c->dev.of_node;
+ struct irq_data *irq_data;
+
+ if (!np) {
+ dev_err(&i2c->dev, "Device Tree not found\n");
+ return -EINVAL;
+ }
+
+ irq_data = irq_get_irq_data(i2c->irq);
+ if (!irq_data) {
+ dev_err(&i2c->dev, "Invalid IRQ: %d\n", i2c->irq);
+ return -EINVAL;
+ }
+
+ as3722->en_intern_int_pullup = of_property_read_bool(np,
+ "ams,enable-internal-int-pullup");
+ as3722->en_intern_i2c_pullup = of_property_read_bool(np,
+ "ams,enable-internal-i2c-pullup");
+ as3722->irq_flags = irqd_get_trigger_type(irq_data);
+ dev_dbg(&i2c->dev, "IRQ flags are 0x%08lx\n", as3722->irq_flags);
+ return 0;
+}
+
+static int as3722_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct as3722 *as3722;
+ unsigned long irq_flags;
+ int ret;
+
+ as3722 = devm_kzalloc(&i2c->dev, sizeof(struct as3722), GFP_KERNEL);
+ if (!as3722)
+ return -ENOMEM;
+
+ as3722->dev = &i2c->dev;
+ as3722->chip_irq = i2c->irq;
+ i2c_set_clientdata(i2c, as3722);
+
+ ret = as3722_i2c_of_probe(i2c, as3722);
+ if (ret < 0)
+ return ret;
+
+ as3722->regmap = devm_regmap_init_i2c(i2c, &as3722_regmap_config);
+ if (IS_ERR(as3722->regmap)) {
+ ret = PTR_ERR(as3722->regmap);
+ dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = as3722_check_device_id(as3722);
+ if (ret < 0)
+ return ret;
+
+ irq_flags = as3722->irq_flags | IRQF_ONESHOT;
+ ret = regmap_add_irq_chip(as3722->regmap, as3722->chip_irq,
+ irq_flags, -1, &as3722_irq_chip,
+ &as3722->irq_data);
+ if (ret < 0) {
+ dev_err(as3722->dev, "Failed to add regmap irq: %d\n", ret);
+ return ret;
+ }
+
+ ret = as3722_configure_pullups(as3722);
+ if (ret < 0)
+ goto scrub;
+
+ ret = mfd_add_devices(&i2c->dev, -1, as3722_devs,
+ ARRAY_SIZE(as3722_devs), NULL, 0,
+ regmap_irq_get_domain(as3722->irq_data));
+ if (ret) {
+ dev_err(as3722->dev, "Failed to add MFD devices: %d\n", ret);
+ goto scrub;
+ }
+
+ dev_dbg(as3722->dev, "AS3722 core driver initialized successfully\n");
+ return 0;
+
+scrub:
+ regmap_del_irq_chip(as3722->chip_irq, as3722->irq_data);
+ return ret;
+}
+
+static int as3722_i2c_remove(struct i2c_client *i2c)
+{
+ struct as3722 *as3722 = i2c_get_clientdata(i2c);
+
+ mfd_remove_devices(as3722->dev);
+ regmap_del_irq_chip(as3722->chip_irq, as3722->irq_data);
+ return 0;
+}
+
+static const struct of_device_id as3722_of_match[] = {
+ { .compatible = "ams,as3722", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, as3722_of_match);
+
+static const struct i2c_device_id as3722_i2c_id[] = {
+ { "as3722", 0 },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, as3722_i2c_id);
+
+static struct i2c_driver as3722_i2c_driver = {
+ .driver = {
+ .name = "as3722",
+ .owner = THIS_MODULE,
+ .of_match_table = as3722_of_match,
+ },
+ .probe = as3722_i2c_probe,
+ .remove = as3722_i2c_remove,
+ .id_table = as3722_i2c_id,
+};
+
+module_i2c_driver(as3722_i2c_driver);
+
+MODULE_DESCRIPTION("I2C support for AS3722 PMICs");
+MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/as3722.h b/include/linux/mfd/as3722.h
new file mode 100644
index 0000000..16bf8a0
--- /dev/null
+++ b/include/linux/mfd/as3722.h
@@ -0,0 +1,423 @@
+/*
+ * as3722 definitions
+ *
+ * Copyright (C) 2013 ams
+ * Copyright (c) 2013, NVIDIA Corporation. All rights reserved.
+ *
+ * Author: Florian Lobmaier <florian.lobmaier@ams.com>
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef __LINUX_MFD_AS3722_H__
+#define __LINUX_MFD_AS3722_H__
+
+#include <linux/regmap.h>
+
+/* AS3722 registers */
+#define AS3722_SD0_VOLTAGE_REG 0x00
+#define AS3722_SD1_VOLTAGE_REG 0x01
+#define AS3722_SD2_VOLTAGE_REG 0x02
+#define AS3722_SD3_VOLTAGE_REG 0x03
+#define AS3722_SD4_VOLTAGE_REG 0x04
+#define AS3722_SD5_VOLTAGE_REG 0x05
+#define AS3722_SD6_VOLTAGE_REG 0x06
+#define AS3722_GPIO0_CONTROL_REG 0x08
+#define AS3722_GPIO1_CONTROL_REG 0x09
+#define AS3722_GPIO2_CONTROL_REG 0x0A
+#define AS3722_GPIO3_CONTROL_REG 0x0B
+#define AS3722_GPIO4_CONTROL_REG 0x0C
+#define AS3722_GPIO5_CONTROL_REG 0x0D
+#define AS3722_GPIO6_CONTROL_REG 0x0E
+#define AS3722_GPIO7_CONTROL_REG 0x0F
+#define AS3722_LDO0_VOLTAGE_REG 0x10
+#define AS3722_LDO1_VOLTAGE_REG 0x11
+#define AS3722_LDO2_VOLTAGE_REG 0x12
+#define AS3722_LDO3_VOLTAGE_REG 0x13
+#define AS3722_LDO4_VOLTAGE_REG 0x14
+#define AS3722_LDO5_VOLTAGE_REG 0x15
+#define AS3722_LDO6_VOLTAGE_REG 0x16
+#define AS3722_LDO7_VOLTAGE_REG 0x17
+#define AS3722_LDO9_VOLTAGE_REG 0x19
+#define AS3722_LDO10_VOLTAGE_REG 0x1A
+#define AS3722_LDO11_VOLTAGE_REG 0x1B
+#define AS3722_GPIO_DEB1_REG 0x1E
+#define AS3722_GPIO_DEB2_REG 0x1F
+#define AS3722_GPIO_SIGNAL_OUT_REG 0x20
+#define AS3722_GPIO_SIGNAL_IN_REG 0x21
+#define AS3722_REG_SEQU_MOD1_REG 0x22
+#define AS3722_REG_SEQU_MOD2_REG 0x23
+#define AS3722_REG_SEQU_MOD3_REG 0x24
+#define AS3722_SD_PHSW_CTRL_REG 0x27
+#define AS3722_SD_PHSW_STATUS 0x28
+#define AS3722_SD0_CONTROL_REG 0x29
+#define AS3722_SD1_CONTROL_REG 0x2A
+#define AS3722_SDmph_CONTROL_REG 0x2B
+#define AS3722_SD23_CONTROL_REG 0x2C
+#define AS3722_SD4_CONTROL_REG 0x2D
+#define AS3722_SD5_CONTROL_REG 0x2E
+#define AS3722_SD6_CONTROL_REG 0x2F
+#define AS3722_SD_DVM_REG 0x30
+#define AS3722_RESET_REASON_REG 0x31
+#define AS3722_BATTERY_VOLTAGE_MONITOR_REG 0x32
+#define AS3722_STARTUP_CONTROL_REG 0x33
+#define AS3722_RESET_TIMER_REG 0x34
+#define AS3722_REFERENCE_CONTROL_REG 0x35
+#define AS3722_RESET_CONTROL_REG 0x36
+#define AS3722_OVER_TEMP_CONTROL_REG 0x37
+#define AS3722_WATCHDOG_CONTROL_REG 0x38
+#define AS3722_REG_STANDBY_MOD1_REG 0x39
+#define AS3722_REG_STANDBY_MOD2_REG 0x3A
+#define AS3722_REG_STANDBY_MOD3_REG 0x3B
+#define AS3722_ENABLE_CTRL1_REG 0x3C
+#define AS3722_ENABLE_CTRL2_REG 0x3D
+#define AS3722_ENABLE_CTRL3_REG 0x3E
+#define AS3722_ENABLE_CTRL4_REG 0x3F
+#define AS3722_ENABLE_CTRL5_REG 0x40
+#define AS3722_PWM_CONTROL_L_REG 0x41
+#define AS3722_PWM_CONTROL_H_REG 0x42
+#define AS3722_WATCHDOG_TIMER_REG 0x46
+#define AS3722_WATCHDOG_SOFTWARE_SIGNAL_REG 0x48
+#define AS3722_IOVOLTAGE_REG 0x49
+#define AS3722_BATTERY_VOLTAGE_MONITOR2_REG 0x4A
+#define AS3722_SD_CONTROL_REG 0x4D
+#define AS3722_LDOCONTROL0_REG 0x4E
+#define AS3722_LDOCONTROL1_REG 0x4F
+#define AS3722_SD0_PROTECT_REG 0x50
+#define AS3722_SD6_PROTECT_REG 0x51
+#define AS3722_PWM_VCONTROL1_REG 0x52
+#define AS3722_PWM_VCONTROL2_REG 0x53
+#define AS3722_PWM_VCONTROL3_REG 0x54
+#define AS3722_PWM_VCONTROL4_REG 0x55
+#define AS3722_BB_CHARGER_REG 0x57
+#define AS3722_CTRL_SEQU1_REG 0x58
+#define AS3722_CTRL_SEQU2_REG 0x59
+#define AS3722_OVCURRENT_REG 0x5A
+#define AS3722_OVCURRENT_DEB_REG 0x5B
+#define AS3722_SDLV_DEB_REG 0x5C
+#define AS3722_OC_PG_CTRL_REG 0x5D
+#define AS3722_OC_PG_CTRL2_REG 0x5E
+#define AS3722_CTRL_STATUS 0x5F
+#define AS3722_RTC_CONTROL_REG 0x60
+#define AS3722_RTC_SECOND_REG 0x61
+#define AS3722_RTC_MINUTE_REG 0x62
+#define AS3722_RTC_HOUR_REG 0x63
+#define AS3722_RTC_DAY_REG 0x64
+#define AS3722_RTC_MONTH_REG 0x65
+#define AS3722_RTC_YEAR_REG 0x66
+#define AS3722_RTC_ALARM_SECOND_REG 0x67
+#define AS3722_RTC_ALARM_MINUTE_REG 0x68
+#define AS3722_RTC_ALARM_HOUR_REG 0x69
+#define AS3722_RTC_ALARM_DAY_REG 0x6A
+#define AS3722_RTC_ALARM_MONTH_REG 0x6B
+#define AS3722_RTC_ALARM_YEAR_REG 0x6C
+#define AS3722_SRAM_REG 0x6D
+#define AS3722_RTC_ACCESS_REG 0x6F
+#define AS3722_RTC_STATUS_REG 0x73
+#define AS3722_INTERRUPT_MASK1_REG 0x74
+#define AS3722_INTERRUPT_MASK2_REG 0x75
+#define AS3722_INTERRUPT_MASK3_REG 0x76
+#define AS3722_INTERRUPT_MASK4_REG 0x77
+#define AS3722_INTERRUPT_STATUS1_REG 0x78
+#define AS3722_INTERRUPT_STATUS2_REG 0x79
+#define AS3722_INTERRUPT_STATUS3_REG 0x7A
+#define AS3722_INTERRUPT_STATUS4_REG 0x7B
+#define AS3722_TEMP_STATUS_REG 0x7D
+#define AS3722_ADC0_CONTROL_REG 0x80
+#define AS3722_ADC1_CONTROL_REG 0x81
+#define AS3722_ADC0_MSB_RESULT_REG 0x82
+#define AS3722_ADC0_LSB_RESULT_REG 0x83
+#define AS3722_ADC1_MSB_RESULT_REG 0x84
+#define AS3722_ADC1_LSB_RESULT_REG 0x85
+#define AS3722_ADC1_THRESHOLD_HI_MSB_REG 0x86
+#define AS3722_ADC1_THRESHOLD_HI_LSB_REG 0x87
+#define AS3722_ADC1_THRESHOLD_LO_MSB_REG 0x88
+#define AS3722_ADC1_THRESHOLD_LO_LSB_REG 0x89
+#define AS3722_ADC_CONFIGURATION_REG 0x8A
+#define AS3722_ASIC_ID1_REG 0x90
+#define AS3722_ASIC_ID2_REG 0x91
+#define AS3722_LOCK_REG 0x9E
+#define AS3722_MAX_REGISTER 0xF4
+
+#define AS3722_SD0_EXT_ENABLE_MASK 0x03
+#define AS3722_SD1_EXT_ENABLE_MASK 0x0C
+#define AS3722_SD2_EXT_ENABLE_MASK 0x30
+#define AS3722_SD3_EXT_ENABLE_MASK 0xC0
+#define AS3722_SD4_EXT_ENABLE_MASK 0x03
+#define AS3722_SD5_EXT_ENABLE_MASK 0x0C
+#define AS3722_SD6_EXT_ENABLE_MASK 0x30
+#define AS3722_LDO0_EXT_ENABLE_MASK 0x03
+#define AS3722_LDO1_EXT_ENABLE_MASK 0x0C
+#define AS3722_LDO2_EXT_ENABLE_MASK 0x30
+#define AS3722_LDO3_EXT_ENABLE_MASK 0xC0
+#define AS3722_LDO4_EXT_ENABLE_MASK 0x03
+#define AS3722_LDO5_EXT_ENABLE_MASK 0x0C
+#define AS3722_LDO6_EXT_ENABLE_MASK 0x30
+#define AS3722_LDO7_EXT_ENABLE_MASK 0xC0
+#define AS3722_LDO9_EXT_ENABLE_MASK 0x0C
+#define AS3722_LDO10_EXT_ENABLE_MASK 0x30
+#define AS3722_LDO11_EXT_ENABLE_MASK 0xC0
+
+#define AS3722_OVCURRENT_SD0_ALARM_MASK 0x07
+#define AS3722_OVCURRENT_SD0_ALARM_SHIFT 0x01
+#define AS3722_OVCURRENT_SD0_TRIP_MASK 0x18
+#define AS3722_OVCURRENT_SD0_TRIP_SHIFT 0x03
+#define AS3722_OVCURRENT_SD1_TRIP_MASK 0x60
+#define AS3722_OVCURRENT_SD1_TRIP_SHIFT 0x05
+
+#define AS3722_OVCURRENT_SD6_ALARM_MASK 0x07
+#define AS3722_OVCURRENT_SD6_ALARM_SHIFT 0x01
+#define AS3722_OVCURRENT_SD6_TRIP_MASK 0x18
+#define AS3722_OVCURRENT_SD6_TRIP_SHIFT 0x03
+
+/* AS3722 register bits and bit masks */
+#define AS3722_LDO_ILIMIT_MASK BIT(7)
+#define AS3722_LDO_ILIMIT_BIT BIT(7)
+#define AS3722_LDO0_VSEL_MASK 0x1F
+#define AS3722_LDO0_VSEL_MIN 0x01
+#define AS3722_LDO0_VSEL_MAX 0x12
+#define AS3722_LDO0_NUM_VOLT 0x12
+#define AS3722_LDO3_VSEL_MASK 0x3F
+#define AS3722_LDO3_VSEL_MIN 0x01
+#define AS3722_LDO3_VSEL_MAX 0x2D
+#define AS3722_LDO3_NUM_VOLT 0x2D
+#define AS3722_LDO_VSEL_MASK 0x7F
+#define AS3722_LDO_VSEL_MIN 0x01
+#define AS3722_LDO_VSEL_MAX 0x7F
+#define AS3722_LDO_VSEL_DNU_MIN 0x25
+#define AS3722_LDO_VSEL_DNU_MAX 0x3F
+#define AS3722_LDO_NUM_VOLT 0x80
+
+#define AS3722_LDO0_CTRL BIT(0)
+#define AS3722_LDO1_CTRL BIT(1)
+#define AS3722_LDO2_CTRL BIT(2)
+#define AS3722_LDO3_CTRL BIT(3)
+#define AS3722_LDO4_CTRL BIT(4)
+#define AS3722_LDO5_CTRL BIT(5)
+#define AS3722_LDO6_CTRL BIT(6)
+#define AS3722_LDO7_CTRL BIT(7)
+#define AS3722_LDO9_CTRL BIT(1)
+#define AS3722_LDO10_CTRL BIT(2)
+#define AS3722_LDO11_CTRL BIT(3)
+
+#define AS3722_LDO3_MODE_MASK (3 << 6)
+#define AS3722_LDO3_MODE_VAL(n) (((n) & 0x3) << 6)
+#define AS3722_LDO3_MODE_PMOS AS3722_LDO3_MODE_VAL(0)
+#define AS3722_LDO3_MODE_PMOS_TRACKING AS3722_LDO3_MODE_VAL(1)
+#define AS3722_LDO3_MODE_NMOS AS3722_LDO3_MODE_VAL(2)
+#define AS3722_LDO3_MODE_SWITCH AS3722_LDO3_MODE_VAL(3)
+
+#define AS3722_SD_VSEL_MASK 0x7F
+#define AS3722_SD0_VSEL_MIN 0x01
+#define AS3722_SD0_VSEL_MAX 0x5A
+#define AS3722_SD2_VSEL_MIN 0x01
+#define AS3722_SD2_VSEL_MAX 0x7F
+
+#define AS3722_SDn_CTRL(n) BIT(n)
+
+#define AS3722_SD0_MODE_FAST BIT(4)
+#define AS3722_SD1_MODE_FAST BIT(4)
+#define AS3722_SD2_MODE_FAST BIT(2)
+#define AS3722_SD3_MODE_FAST BIT(6)
+#define AS3722_SD4_MODE_FAST BIT(2)
+#define AS3722_SD5_MODE_FAST BIT(2)
+#define AS3722_SD6_MODE_FAST BIT(4)
+
+#define AS3722_POWER_OFF BIT(1)
+
+#define AS3722_INTERRUPT_MASK1_LID BIT(0)
+#define AS3722_INTERRUPT_MASK1_ACOK BIT(1)
+#define AS3722_INTERRUPT_MASK1_ENABLE1 BIT(2)
+#define AS3722_INTERRUPT_MASK1_OCURR_ALARM_SD0 BIT(3)
+#define AS3722_INTERRUPT_MASK1_ONKEY_LONG BIT(4)
+#define AS3722_INTERRUPT_MASK1_ONKEY BIT(5)
+#define AS3722_INTERRUPT_MASK1_OVTMP BIT(6)
+#define AS3722_INTERRUPT_MASK1_LOWBAT BIT(7)
+
+#define AS3722_INTERRUPT_MASK2_SD0_LV BIT(0)
+#define AS3722_INTERRUPT_MASK2_SD1_LV BIT(1)
+#define AS3722_INTERRUPT_MASK2_SD2345_LV BIT(2)
+#define AS3722_INTERRUPT_MASK2_PWM1_OV_PROT BIT(3)
+#define AS3722_INTERRUPT_MASK2_PWM2_OV_PROT BIT(4)
+#define AS3722_INTERRUPT_MASK2_ENABLE2 BIT(5)
+#define AS3722_INTERRUPT_MASK2_SD6_LV BIT(6)
+#define AS3722_INTERRUPT_MASK2_RTC_REP BIT(7)
+
+#define AS3722_INTERRUPT_MASK3_RTC_ALARM BIT(0)
+#define AS3722_INTERRUPT_MASK3_GPIO1 BIT(1)
+#define AS3722_INTERRUPT_MASK3_GPIO2 BIT(2)
+#define AS3722_INTERRUPT_MASK3_GPIO3 BIT(3)
+#define AS3722_INTERRUPT_MASK3_GPIO4 BIT(4)
+#define AS3722_INTERRUPT_MASK3_GPIO5 BIT(5)
+#define AS3722_INTERRUPT_MASK3_WATCHDOG BIT(6)
+#define AS3722_INTERRUPT_MASK3_ENABLE3 BIT(7)
+
+#define AS3722_INTERRUPT_MASK4_TEMP_SD0_SHUTDOWN BIT(0)
+#define AS3722_INTERRUPT_MASK4_TEMP_SD1_SHUTDOWN BIT(1)
+#define AS3722_INTERRUPT_MASK4_TEMP_SD6_SHUTDOWN BIT(2)
+#define AS3722_INTERRUPT_MASK4_TEMP_SD0_ALARM BIT(3)
+#define AS3722_INTERRUPT_MASK4_TEMP_SD1_ALARM BIT(4)
+#define AS3722_INTERRUPT_MASK4_TEMP_SD6_ALARM BIT(5)
+#define AS3722_INTERRUPT_MASK4_OCCUR_ALARM_SD6 BIT(6)
+#define AS3722_INTERRUPT_MASK4_ADC BIT(7)
+
+#define AS3722_ADC1_INTERVAL_TIME BIT(0)
+#define AS3722_ADC1_INT_MODE_ON BIT(1)
+#define AS3722_ADC_BUF_ON BIT(2)
+#define AS3722_ADC1_LOW_VOLTAGE_RANGE BIT(5)
+#define AS3722_ADC1_INTEVAL_SCAN BIT(6)
+#define AS3722_ADC1_INT_MASK BIT(7)
+
+#define AS3722_ADC_MSB_VAL_MASK 0x7F
+#define AS3722_ADC_LSB_VAL_MASK 0x07
+
+#define AS3722_ADC0_CONV_START BIT(7)
+#define AS3722_ADC0_CONV_NOTREADY BIT(7)
+#define AS3722_ADC0_SOURCE_SELECT_MASK 0x1F
+
+#define AS3722_ADC1_CONV_START BIT(7)
+#define AS3722_ADC1_CONV_NOTREADY BIT(7)
+#define AS3722_ADC1_SOURCE_SELECT_MASK 0x1F
+
+/* GPIO modes */
+#define AS3722_GPIO_MODE_MASK 0x07
+#define AS3722_GPIO_MODE_INPUT 0x00
+#define AS3722_GPIO_MODE_OUTPUT_VDDH 0x01
+#define AS3722_GPIO_MODE_IO_OPEN_DRAIN 0x02
+#define AS3722_GPIO_MODE_ADC_IN 0x03
+#define AS3722_GPIO_MODE_INPUT_PULL_UP 0x04
+#define AS3722_GPIO_MODE_INPUT_PULL_DOWN 0x05
+#define AS3722_GPIO_MODE_IO_OPEN_DRAIN_PULL_UP 0x06
+#define AS3722_GPIO_MODE_OUTPUT_VDDL 0x07
+#define AS3722_GPIO_MODE_VAL(n) ((n) & AS3722_GPIO_MODE_MASK)
+
+#define AS3722_GPIO_INV BIT(7)
+#define AS3722_GPIO_IOSF_MASK 0x78
+#define AS3722_GPIO_IOSF_VAL(n) (((n) & 0xF) << 3)
+#define AS3722_GPIO_IOSF_NORMAL AS3722_GPIO_IOSF_VAL(0)
+#define AS3722_GPIO_IOSF_INTERRUPT_OUT AS3722_GPIO_IOSF_VAL(1)
+#define AS3722_GPIO_IOSF_VSUP_LOW_OUT AS3722_GPIO_IOSF_VAL(2)
+#define AS3722_GPIO_IOSF_GPIO_INTERRUPT_IN AS3722_GPIO_IOSF_VAL(3)
+#define AS3722_GPIO_IOSF_ISINK_PWM_IN AS3722_GPIO_IOSF_VAL(4)
+#define AS3722_GPIO_IOSF_VOLTAGE_STBY AS3722_GPIO_IOSF_VAL(5)
+#define AS3722_GPIO_IOSF_PWR_GOOD_OUT AS3722_GPIO_IOSF_VAL(7)
+#define AS3722_GPIO_IOSF_Q32K_OUT AS3722_GPIO_IOSF_VAL(8)
+#define AS3722_GPIO_IOSF_WATCHDOG_IN AS3722_GPIO_IOSF_VAL(9)
+#define AS3722_GPIO_IOSF_SOFT_RESET_IN AS3722_GPIO_IOSF_VAL(11)
+#define AS3722_GPIO_IOSF_PWM_OUT AS3722_GPIO_IOSF_VAL(12)
+#define AS3722_GPIO_IOSF_VSUP_LOW_DEB_OUT AS3722_GPIO_IOSF_VAL(13)
+#define AS3722_GPIO_IOSF_SD6_LOW_VOLT_LOW AS3722_GPIO_IOSF_VAL(14)
+
+#define AS3722_GPIOn_SIGNAL(n) BIT(n)
+#define AS3722_GPIOn_CONTROL_REG(n) (AS3722_GPIO0_CONTROL_REG + n)
+#define AS3722_I2C_PULL_UP BIT(4)
+#define AS3722_INT_PULL_UP BIT(5)
+
+#define AS3722_RTC_REP_WAKEUP_EN BIT(0)
+#define AS3722_RTC_ALARM_WAKEUP_EN BIT(1)
+#define AS3722_RTC_ON BIT(2)
+#define AS3722_RTC_IRQMODE BIT(3)
+#define AS3722_RTC_CLK32K_OUT_EN BIT(5)
+
+#define AS3722_WATCHDOG_TIMER_MAX 0x7F
+#define AS3722_WATCHDOG_ON BIT(0)
+#define AS3722_WATCHDOG_SW_SIG BIT(0)
+
+#define AS3722_EXT_CONTROL_ENABLE1 0x1
+#define AS3722_EXT_CONTROL_ENABLE2 0x2
+#define AS3722_EXT_CONTROL_ENABLE3 0x3
+
+/* Interrupt IDs */
+enum as3722_irq {
+ AS3722_IRQ_LID,
+ AS3722_IRQ_ACOK,
+ AS3722_IRQ_ENABLE1,
+ AS3722_IRQ_OCCUR_ALARM_SD0,
+ AS3722_IRQ_ONKEY_LONG_PRESS,
+ AS3722_IRQ_ONKEY,
+ AS3722_IRQ_OVTMP,
+ AS3722_IRQ_LOWBAT,
+ AS3722_IRQ_SD0_LV,
+ AS3722_IRQ_SD1_LV,
+ AS3722_IRQ_SD2_LV,
+ AS3722_IRQ_PWM1_OV_PROT,
+ AS3722_IRQ_PWM2_OV_PROT,
+ AS3722_IRQ_ENABLE2,
+ AS3722_IRQ_SD6_LV,
+ AS3722_IRQ_RTC_REP,
+ AS3722_IRQ_RTC_ALARM,
+ AS3722_IRQ_GPIO1,
+ AS3722_IRQ_GPIO2,
+ AS3722_IRQ_GPIO3,
+ AS3722_IRQ_GPIO4,
+ AS3722_IRQ_GPIO5,
+ AS3722_IRQ_WATCHDOG,
+ AS3722_IRQ_ENABLE3,
+ AS3722_IRQ_TEMP_SD0_SHUTDOWN,
+ AS3722_IRQ_TEMP_SD1_SHUTDOWN,
+ AS3722_IRQ_TEMP_SD2_SHUTDOWN,
+ AS3722_IRQ_TEMP_SD0_ALARM,
+ AS3722_IRQ_TEMP_SD1_ALARM,
+ AS3722_IRQ_TEMP_SD6_ALARM,
+ AS3722_IRQ_OCCUR_ALARM_SD6,
+ AS3722_IRQ_ADC,
+ AS3722_IRQ_MAX,
+};
+
+struct as3722 {
+ struct device *dev;
+ struct regmap *regmap;
+ int chip_irq;
+ unsigned long irq_flags;
+ bool en_intern_int_pullup;
+ bool en_intern_i2c_pullup;
+ struct regmap_irq_chip_data *irq_data;
+};
+
+static inline int as3722_read(struct as3722 *as3722, u32 reg, u32 *dest)
+{
+ return regmap_read(as3722->regmap, reg, dest);
+}
+
+static inline int as3722_write(struct as3722 *as3722, u32 reg, u32 value)
+{
+ return regmap_write(as3722->regmap, reg, value);
+}
+
+static inline int as3722_block_read(struct as3722 *as3722, u32 reg,
+ int count, u8 *buf)
+{
+ return regmap_bulk_read(as3722->regmap, reg, buf, count);
+}
+
+static inline int as3722_block_write(struct as3722 *as3722, u32 reg,
+ int count, u8 *data)
+{
+ return regmap_bulk_write(as3722->regmap, reg, data, count);
+}
+
+static inline int as3722_update_bits(struct as3722 *as3722, u32 reg,
+ u32 mask, u8 val)
+{
+ return regmap_update_bits(as3722->regmap, reg, mask, val);
+}
+
+static inline int as3722_irq_get_virq(struct as3722 *as3722, int irq)
+{
+ return regmap_irq_get_virq(as3722->irq_data, irq);
+}
+#endif /* __LINUX_MFD_AS3722_H__ */
--
1.7.1.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH V5 2/3] pincntrl: add support for ams AS3722 pin control driver
2013-10-02 15:50 [PATCH V4 0/3] Add AMS AS3722 mfd, pincontrol, regulator and RTC driver Laxman Dewangan
2013-10-02 15:50 ` [PATCH V4 1/3] mfd: add support for ams AS3722 PMIC Laxman Dewangan
@ 2013-10-02 15:50 ` Laxman Dewangan
2013-10-08 12:16 ` [rtc-linux] " Linus Walleij
2013-10-02 15:50 ` [PATCH V4 3/3] drivers/rtc/rtc-as3722: add RTC driver Laxman Dewangan
2 siblings, 1 reply; 9+ messages in thread
From: Laxman Dewangan @ 2013-10-02 15:50 UTC (permalink / raw)
To: lee.jones, sameo, broonie, linus.walleij, akpm
Cc: devicetree, linux-doc, linux-kernel, linux-gpio, rtc-linux,
rob.herring, mark.rutland, pawel.moll, swarren, rob,
ijc+devicetree, grant.likely, Laxman Dewangan
The AS3722 is a compact system PMU suitable for mobile phones, tablets etc.
Add a driver to support accessing the GPIO, pinmux and pin configuration
of 8 GPIO pins found on the ams AS3722 through pin control driver and
gpiolib.
The driver will register itself as the pincontrol driver and gpio driver.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
---
Changes from V1:
- Nit cleanups in driver and use module_platform_driver.
Changes from V2:
- Move the gpio driver from gpio folder to pinctnrl driver and register
driver as pincontrol driver.
- Provide pin configuration through pincntrl framework.
Changes from V3:
- Added gpio ranges and pinctrl_gpio calls.
- Used pinctrl_gpio_* calls on gpio chips callback.
- Remove dummy function which just return not supported.
- Nit cleanups.
Changes from V4:
- Drop separate DT binding document as it is moved to mfd/as3722.txt.
drivers/pinctrl/Kconfig | 11 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/pinctrl-as3722.c | 630 ++++++++++++++++++++++++++++++++++++++
3 files changed, 642 insertions(+), 0 deletions(-)
create mode 100644 drivers/pinctrl/pinctrl-as3722.c
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 21db201..85f5462 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -59,6 +59,17 @@ config PINCTRL_ADI2
future processors. This option is selected automatically when specific
machine and arch are selected to build.
+config PINCTRL_AS3722
+ bool "Pinctrl and GPIO driver for ams AS3722 PMIC"
+ depends on MFD_AS3722 && GPIOLIB
+ select PINMUX
+ select GENERIC_PINCONF
+ help
+ AS3722 device supports the configuration of GPIO pins for different
+ functionality. This driver supports the pinmux, push-pull and
+ open drain configuration for the GPIO pins of AS3722 devices. It also
+ supports the GPIO functionality through gpiolib.
+
config PINCTRL_BF54x
def_bool y if BF54x
select PINCTRL_ADI2
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index bbeb980..3d14cb8 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_PINCTRL_AB8540) += pinctrl-ab8540.o
obj-$(CONFIG_PINCTRL_AB9540) += pinctrl-ab9540.o
obj-$(CONFIG_PINCTRL_AB8505) += pinctrl-ab8505.o
obj-$(CONFIG_PINCTRL_ADI2) += pinctrl-adi2.o
+obj-$(CONFIG_PINCTRL_AS3722) += pinctrl-as3722.o
obj-$(CONFIG_PINCTRL_BF54x) += pinctrl-adi2-bf54x.o
obj-$(CONFIG_PINCTRL_BF60x) += pinctrl-adi2-bf60x.o
obj-$(CONFIG_PINCTRL_AT91) += pinctrl-at91.o
diff --git a/drivers/pinctrl/pinctrl-as3722.c b/drivers/pinctrl/pinctrl-as3722.c
new file mode 100644
index 0000000..01bffc1
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-as3722.c
@@ -0,0 +1,630 @@
+/*
+ * ams AS3722 pin control and GPIO driver.
+ *
+ * Copyright (c) 2013, NVIDIA Corporation.
+ *
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
+ * whether express or implied; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307, USA
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mfd/as3722.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pm.h>
+#include <linux/slab.h>
+
+#include "core.h"
+#include "pinconf.h"
+#include "pinctrl-utils.h"
+
+#define AS3722_PIN_GPIO0 0
+#define AS3722_PIN_GPIO1 1
+#define AS3722_PIN_GPIO2 2
+#define AS3722_PIN_GPIO3 3
+#define AS3722_PIN_GPIO4 4
+#define AS3722_PIN_GPIO5 5
+#define AS3722_PIN_GPIO6 6
+#define AS3722_PIN_GPIO7 7
+#define AS3722_PIN_NUM (AS3722_PIN_GPIO7 + 1)
+
+#define AS3722_GPIO_MODE_PULL_UP BIT(PIN_CONFIG_BIAS_PULL_UP)
+#define AS3722_GPIO_MODE_PULL_DOWN BIT(PIN_CONFIG_BIAS_PULL_DOWN)
+#define AS3722_GPIO_MODE_HIGH_IMPED BIT(PIN_CONFIG_BIAS_HIGH_IMPEDANCE)
+#define AS3722_GPIO_MODE_OPEN_DRAIN BIT(PIN_CONFIG_DRIVE_OPEN_DRAIN)
+
+struct as3722_pin_function {
+ const char *name;
+ const char * const *groups;
+ unsigned ngroups;
+ int mux_option;
+};
+
+struct as3722_gpio_pin_control {
+ bool enable_gpio_invert;
+ unsigned mode_prop;
+ int io_function;
+};
+
+struct as3722_pingroup {
+ const char *name;
+ const unsigned pins[1];
+ unsigned npins;
+};
+
+struct as3722_pctrl_info {
+ struct device *dev;
+ struct pinctrl_dev *pctl;
+ struct as3722 *as3722;
+ struct gpio_chip gpio_chip;
+ int pins_current_opt[AS3722_PIN_NUM];
+ const struct as3722_pin_function *functions;
+ unsigned num_functions;
+ const struct as3722_pingroup *pin_groups;
+ int num_pin_groups;
+ const struct pinctrl_pin_desc *pins;
+ unsigned num_pins;
+ struct as3722_gpio_pin_control gpio_control[AS3722_PIN_NUM];
+};
+
+static const struct pinctrl_pin_desc as3722_pins_desc[] = {
+ PINCTRL_PIN(AS3722_PIN_GPIO0, "gpio0"),
+ PINCTRL_PIN(AS3722_PIN_GPIO1, "gpio1"),
+ PINCTRL_PIN(AS3722_PIN_GPIO2, "gpio2"),
+ PINCTRL_PIN(AS3722_PIN_GPIO3, "gpio3"),
+ PINCTRL_PIN(AS3722_PIN_GPIO4, "gpio4"),
+ PINCTRL_PIN(AS3722_PIN_GPIO5, "gpio5"),
+ PINCTRL_PIN(AS3722_PIN_GPIO6, "gpio6"),
+ PINCTRL_PIN(AS3722_PIN_GPIO7, "gpio7"),
+};
+
+static const char * const gpio_groups[] = {
+ "gpio0",
+ "gpio1",
+ "gpio2",
+ "gpio3",
+ "gpio4",
+ "gpio5",
+ "gpio6",
+ "gpio7",
+};
+
+enum as3722_pinmux_option {
+ AS3722_PINMUX_GPIO = 0,
+ AS3722_PINMUX_INTERRUPT_OUT = 1,
+ AS3722_PINMUX_VSUB_VBAT_UNDEB_LOW_OUT = 2,
+ AS3722_PINMUX_GPIO_INTERRUPT = 3,
+ AS3722_PINMUX_PWM_INPUT = 4,
+ AS3722_PINMUX_VOLTAGE_IN_STBY = 5,
+ AS3722_PINMUX_OC_PG_SD0 = 6,
+ AS3722_PINMUX_PG_OUT = 7,
+ AS3722_PINMUX_CLK32K_OUT = 8,
+ AS3722_PINMUX_WATCHDOG_INPUT = 9,
+ AS3722_PINMUX_SOFT_RESET_IN = 11,
+ AS3722_PINMUX_PWM_OUTPUT = 12,
+ AS3722_PINMUX_VSUB_VBAT_LOW_DEB_OUT = 13,
+ AS3722_PINMUX_OC_PG_SD6 = 14,
+};
+
+#define FUNCTION_GROUP(fname, mux) \
+ { \
+ .name = #fname, \
+ .groups = gpio_groups, \
+ .ngroups = ARRAY_SIZE(gpio_groups), \
+ .mux_option = AS3722_PINMUX_##mux, \
+ }
+
+static const struct as3722_pin_function as3722_pin_function[] = {
+ FUNCTION_GROUP(gpio, GPIO),
+ FUNCTION_GROUP(interrupt-out, INTERRUPT_OUT),
+ FUNCTION_GROUP(gpio-in-interrupt, GPIO_INTERRUPT),
+ FUNCTION_GROUP(vsup-vbat-low-undebounce-out, VSUB_VBAT_UNDEB_LOW_OUT),
+ FUNCTION_GROUP(vsup-vbat-low-debounce-out, VSUB_VBAT_LOW_DEB_OUT),
+ FUNCTION_GROUP(voltage-in-standby, VOLTAGE_IN_STBY),
+ FUNCTION_GROUP(oc-pg-sd0, OC_PG_SD0),
+ FUNCTION_GROUP(oc-pg-sd6, OC_PG_SD6),
+ FUNCTION_GROUP(powergood-out, PG_OUT),
+ FUNCTION_GROUP(pwm-in, PWM_INPUT),
+ FUNCTION_GROUP(pwm-out, PWM_OUTPUT),
+ FUNCTION_GROUP(clk32k-out, CLK32K_OUT),
+ FUNCTION_GROUP(watchdog-in, WATCHDOG_INPUT),
+ FUNCTION_GROUP(soft-reset-in, SOFT_RESET_IN),
+};
+
+#define AS3722_PINGROUP(pg_name, pin_id) \
+ { \
+ .name = #pg_name, \
+ .pins = {AS3722_PIN_##pin_id}, \
+ .npins = 1, \
+ }
+
+static const struct as3722_pingroup as3722_pingroups[] = {
+ AS3722_PINGROUP(gpio0, GPIO0),
+ AS3722_PINGROUP(gpio1, GPIO1),
+ AS3722_PINGROUP(gpio2, GPIO2),
+ AS3722_PINGROUP(gpio3, GPIO3),
+ AS3722_PINGROUP(gpio4, GPIO4),
+ AS3722_PINGROUP(gpio5, GPIO5),
+ AS3722_PINGROUP(gpio6, GPIO6),
+ AS3722_PINGROUP(gpio7, GPIO7),
+};
+
+static int as3722_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+
+ return as_pci->num_pin_groups;
+}
+
+static const char *as3722_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned group)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+
+ return as_pci->pin_groups[group].name;
+}
+
+static int as3722_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned group, const unsigned **pins, unsigned *num_pins)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = as_pci->pin_groups[group].pins;
+ *num_pins = as_pci->pin_groups[group].npins;
+ return 0;
+}
+
+static const struct pinctrl_ops as3722_pinctrl_ops = {
+ .get_groups_count = as3722_pinctrl_get_groups_count,
+ .get_group_name = as3722_pinctrl_get_group_name,
+ .get_group_pins = as3722_pinctrl_get_group_pins,
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+ .dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int as3722_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+
+ return as_pci->num_functions;
+}
+
+static const char *as3722_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
+ unsigned function)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+
+ return as_pci->functions[function].name;
+}
+
+static int as3722_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
+ unsigned function, const char * const **groups,
+ unsigned * const num_groups)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = as_pci->functions[function].groups;
+ *num_groups = as_pci->functions[function].ngroups;
+ return 0;
+}
+
+static int as3722_pinctrl_enable(struct pinctrl_dev *pctldev, unsigned function,
+ unsigned group)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+ int gpio_cntr_reg = AS3722_GPIOn_CONTROL_REG(group);
+ u8 val = AS3722_GPIO_IOSF_VAL(as_pci->functions[function].mux_option);
+ int ret;
+
+ dev_dbg(as_pci->dev, "%s(): GPIO %u pin to function %u and val %u\n",
+ __func__, group, function, val);
+
+ ret = as3722_update_bits(as_pci->as3722, gpio_cntr_reg,
+ AS3722_GPIO_IOSF_MASK, val);
+ if (ret < 0) {
+ dev_err(as_pci->dev, "GPIO%d_CTRL_REG update failed %d\n",
+ group, ret);
+ return ret;
+ }
+ as_pci->gpio_control[group].io_function = function;
+ return ret;
+}
+
+static int as3722_pinctrl_gpio_get_mode(unsigned gpio_mode_prop, bool input)
+{
+ if (gpio_mode_prop & AS3722_GPIO_MODE_HIGH_IMPED)
+ return -EINVAL;
+
+ if (gpio_mode_prop & AS3722_GPIO_MODE_OPEN_DRAIN) {
+ if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_UP)
+ return AS3722_GPIO_MODE_IO_OPEN_DRAIN_PULL_UP;
+ return AS3722_GPIO_MODE_IO_OPEN_DRAIN;
+ }
+ if (input) {
+ if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_UP)
+ return AS3722_GPIO_MODE_INPUT_PULL_UP;
+ else if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_DOWN)
+ return AS3722_GPIO_MODE_INPUT_PULL_DOWN;
+ return AS3722_GPIO_MODE_INPUT;
+ }
+ if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_DOWN)
+ return AS3722_GPIO_MODE_OUTPUT_VDDL;
+ return AS3722_GPIO_MODE_OUTPUT_VDDH;
+}
+
+static int as3722_pinctrl_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned offset)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+
+ if (as_pci->gpio_control[offset].io_function)
+ return -EBUSY;
+ return 0;
+}
+
+static int as3722_pinctrl_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned offset, bool input)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+ struct as3722 *as3722 = as_pci->as3722;
+ int mode;
+
+ mode = as3722_pinctrl_gpio_get_mode(
+ as_pci->gpio_control[offset].mode_prop, input);
+ if (mode < 0) {
+ dev_err(as_pci->dev, "%s direction for GPIO %d not supported\n",
+ (input) ? "Input" : "Output", offset);
+ return mode;
+ }
+
+ if (as_pci->gpio_control[offset].enable_gpio_invert)
+ mode |= AS3722_GPIO_INV;
+
+ return as3722_write(as3722, AS3722_GPIOn_CONTROL_REG(offset), mode);
+}
+
+static const struct pinmux_ops as3722_pinmux_ops = {
+ .get_functions_count = as3722_pinctrl_get_funcs_count,
+ .get_function_name = as3722_pinctrl_get_func_name,
+ .get_function_groups = as3722_pinctrl_get_func_groups,
+ .enable = as3722_pinctrl_enable,
+ .gpio_request_enable = as3722_pinctrl_gpio_request_enable,
+ .gpio_set_direction = as3722_pinctrl_gpio_set_direction,
+};
+
+static int as3722_pinconf_get(struct pinctrl_dev *pctldev,
+ unsigned pin, unsigned long *config)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+ enum pin_config_param param = pinconf_to_config_param(*config);
+ int arg = 0;
+ u16 prop;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ prop = AS3722_GPIO_MODE_PULL_UP |
+ AS3722_GPIO_MODE_PULL_DOWN;
+ if (!(as_pci->gpio_control[pin].mode_prop & prop))
+ arg = 1;
+ prop = 0;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ prop = AS3722_GPIO_MODE_PULL_UP;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ prop = AS3722_GPIO_MODE_PULL_DOWN;
+ break;
+
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ prop = AS3722_GPIO_MODE_OPEN_DRAIN;
+ break;
+
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ prop = AS3722_GPIO_MODE_HIGH_IMPED;
+ break;
+
+ default:
+ dev_err(as_pci->dev, "Properties not supported\n");
+ return -ENOTSUPP;
+ }
+
+ if (as_pci->gpio_control[pin].mode_prop & prop)
+ arg = 1;
+
+ *config = pinconf_to_config_packed(param, (u16)arg);
+ return 0;
+}
+
+static int as3722_pinconf_set(struct pinctrl_dev *pctldev,
+ unsigned pin, unsigned long *configs,
+ unsigned num_configs)
+{
+ struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
+ enum pin_config_param param;
+ int mode_prop;
+ int i;
+
+ for (i = 0; i < num_configs; i++) {
+ param = pinconf_to_config_param(configs[i]);
+ mode_prop = as_pci->gpio_control[pin].mode_prop;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
+ break;
+
+ case PIN_CONFIG_BIAS_DISABLE:
+ mode_prop &= ~(AS3722_GPIO_MODE_PULL_UP |
+ AS3722_GPIO_MODE_PULL_DOWN);
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ mode_prop |= AS3722_GPIO_MODE_PULL_UP;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ mode_prop |= AS3722_GPIO_MODE_PULL_DOWN;
+ break;
+
+ case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
+ mode_prop |= AS3722_GPIO_MODE_HIGH_IMPED;
+ break;
+
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ mode_prop |= AS3722_GPIO_MODE_OPEN_DRAIN;
+ break;
+
+ default:
+ dev_err(as_pci->dev, "Properties not supported\n");
+ return -ENOTSUPP;
+ }
+
+ as_pci->gpio_control[pin].mode_prop = mode_prop;
+ }
+ return 0;
+}
+
+static const struct pinconf_ops as3722_pinconf_ops = {
+ .pin_config_get = as3722_pinconf_get,
+ .pin_config_set = as3722_pinconf_set,
+};
+
+static struct pinctrl_desc as3722_pinctrl_desc = {
+ .pctlops = &as3722_pinctrl_ops,
+ .pmxops = &as3722_pinmux_ops,
+ .confops = &as3722_pinconf_ops,
+ .owner = THIS_MODULE,
+};
+
+static inline struct as3722_pctrl_info *to_as_pci(struct gpio_chip *chip)
+{
+ return container_of(chip, struct as3722_pctrl_info, gpio_chip);
+}
+
+static int as3722_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct as3722_pctrl_info *as_pci = to_as_pci(chip);
+ struct as3722 *as3722 = as_pci->as3722;
+ int ret;
+ u32 reg;
+ u32 control;
+ u32 val;
+ int mode;
+ int invert_enable;
+
+ ret = as3722_read(as3722, AS3722_GPIOn_CONTROL_REG(offset), &control);
+ if (ret < 0) {
+ dev_err(as_pci->dev,
+ "GPIO_CONTROL%d_REG read failed: %d\n", offset, ret);
+ return ret;
+ }
+
+ invert_enable = !!(control & AS3722_GPIO_INV);
+ mode = control & AS3722_GPIO_MODE_MASK;
+ switch (mode) {
+ case AS3722_GPIO_MODE_INPUT:
+ case AS3722_GPIO_MODE_INPUT_PULL_UP:
+ case AS3722_GPIO_MODE_INPUT_PULL_DOWN:
+ case AS3722_GPIO_MODE_IO_OPEN_DRAIN:
+ case AS3722_GPIO_MODE_IO_OPEN_DRAIN_PULL_UP:
+ reg = AS3722_GPIO_SIGNAL_IN_REG;
+ break;
+ case AS3722_GPIO_MODE_OUTPUT_VDDH:
+ case AS3722_GPIO_MODE_OUTPUT_VDDL:
+ reg = AS3722_GPIO_SIGNAL_OUT_REG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = as3722_read(as3722, reg, &val);
+ if (ret < 0) {
+ dev_err(as_pci->dev,
+ "GPIO_SIGNAL_IN_REG read failed: %d\n", ret);
+ return ret;
+ }
+
+ val = !!(val & AS3722_GPIOn_SIGNAL(offset));
+ return (invert_enable) ? !val : val;
+}
+
+static void as3722_gpio_set(struct gpio_chip *chip, unsigned offset,
+ int value)
+{
+ struct as3722_pctrl_info *as_pci = to_as_pci(chip);
+ struct as3722 *as3722 = as_pci->as3722;
+ int en_invert = as_pci->gpio_control[offset].enable_gpio_invert;
+ u32 val;
+ int ret;
+
+ if (value)
+ val = (en_invert) ? 0 : AS3722_GPIOn_SIGNAL(offset);
+ else
+ val = (en_invert) ? AS3722_GPIOn_SIGNAL(offset) : 0;
+
+ ret = as3722_update_bits(as3722, AS3722_GPIO_SIGNAL_OUT_REG,
+ AS3722_GPIOn_SIGNAL(offset), val);
+ if (ret < 0)
+ dev_err(as_pci->dev,
+ "GPIO_SIGNAL_OUT_REG update failed: %d\n", ret);
+}
+
+static int as3722_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ return pinctrl_gpio_direction_input(chip->base + offset);
+}
+
+static int as3722_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ as3722_gpio_set(chip, offset, value);
+ return pinctrl_gpio_direction_output(chip->base + offset);
+}
+
+static int as3722_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct as3722_pctrl_info *as_pci = to_as_pci(chip);
+
+ return as3722_irq_get_virq(as_pci->as3722, offset);
+}
+
+static int as3722_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ return pinctrl_request_gpio(chip->base + offset);
+}
+
+static void as3722_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ pinctrl_free_gpio(chip->base + offset);
+}
+
+static const struct gpio_chip as3722_gpio_chip = {
+ .label = "as3722-gpio",
+ .owner = THIS_MODULE,
+ .request = as3722_gpio_request,
+ .free = as3722_gpio_free,
+ .get = as3722_gpio_get,
+ .set = as3722_gpio_set,
+ .direction_input = as3722_gpio_direction_input,
+ .direction_output = as3722_gpio_direction_output,
+ .to_irq = as3722_gpio_to_irq,
+ .can_sleep = 1,
+ .ngpio = AS3722_PIN_NUM,
+ .base = -1,
+};
+
+static int as3722_pinctrl_probe(struct platform_device *pdev)
+{
+ struct as3722_pctrl_info *as_pci;
+ int ret;
+ int tret;
+
+ as_pci = devm_kzalloc(&pdev->dev, sizeof(*as_pci), GFP_KERNEL);
+ if (!as_pci)
+ return -ENOMEM;
+
+ as_pci->dev = &pdev->dev;
+ as_pci->dev->of_node = pdev->dev.parent->of_node;
+ as_pci->as3722 = dev_get_drvdata(pdev->dev.parent);
+ platform_set_drvdata(pdev, as_pci);
+
+ as_pci->pins = as3722_pins_desc;
+ as_pci->num_pins = ARRAY_SIZE(as3722_pins_desc);
+ as_pci->functions = as3722_pin_function;
+ as_pci->num_functions = ARRAY_SIZE(as3722_pin_function);
+ as_pci->pin_groups = as3722_pingroups;
+ as_pci->num_pin_groups = ARRAY_SIZE(as3722_pingroups);
+ as3722_pinctrl_desc.name = dev_name(&pdev->dev);
+ as3722_pinctrl_desc.pins = as3722_pins_desc;
+ as3722_pinctrl_desc.npins = ARRAY_SIZE(as3722_pins_desc);
+ as_pci->pctl = pinctrl_register(&as3722_pinctrl_desc,
+ &pdev->dev, as_pci);
+ if (!as_pci->pctl) {
+ dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
+ return -EINVAL;
+ }
+
+ as_pci->gpio_chip = as3722_gpio_chip;
+ as_pci->gpio_chip.dev = &pdev->dev;
+ as_pci->gpio_chip.of_node = pdev->dev.parent->of_node;
+ ret = gpiochip_add(&as_pci->gpio_chip);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Couldn't register gpiochip, %d\n", ret);
+ goto fail_chip_add;
+ }
+
+ ret = gpiochip_add_pin_range(&as_pci->gpio_chip, dev_name(&pdev->dev),
+ 0, 0, AS3722_PIN_NUM);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Couldn't add pin range, %d\n", ret);
+ goto fail_range_add;
+ }
+
+ return 0;
+
+fail_range_add:
+ tret = gpiochip_remove(&as_pci->gpio_chip);
+ if (tret < 0)
+ dev_warn(&pdev->dev, "Couldn't remove gpio chip, %d\n", tret);
+
+fail_chip_add:
+ pinctrl_unregister(as_pci->pctl);
+ return ret;
+}
+
+static int as3722_pinctrl_remove(struct platform_device *pdev)
+{
+ struct as3722_pctrl_info *as_pci = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = gpiochip_remove(&as_pci->gpio_chip);
+ if (ret < 0)
+ return ret;
+ pinctrl_unregister(as_pci->pctl);
+ return 0;
+}
+
+static struct of_device_id as3722_pinctrl_of_match[] = {
+ { .compatible = "ams,as3722-pinctrl", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, as3722_pinctrl_of_match);
+
+static struct platform_driver as3722_pinctrl_driver = {
+ .driver = {
+ .name = "as3722-pinctrl",
+ .owner = THIS_MODULE,
+ .of_match_table = as3722_pinctrl_of_match,
+ },
+ .probe = as3722_pinctrl_probe,
+ .remove = as3722_pinctrl_remove,
+};
+module_platform_driver(as3722_pinctrl_driver);
+
+MODULE_ALIAS("platform:as3722-pinctrl");
+MODULE_DESCRIPTION("AS3722 pin control and GPIO driver");
+MODULE_AUTHOR("Laxman Dewangan<ldewangan@nvidia.com>");
+MODULE_LICENSE("GPL v2");
--
1.7.1.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH V4 3/3] drivers/rtc/rtc-as3722: add RTC driver
2013-10-02 15:50 [PATCH V4 0/3] Add AMS AS3722 mfd, pincontrol, regulator and RTC driver Laxman Dewangan
2013-10-02 15:50 ` [PATCH V4 1/3] mfd: add support for ams AS3722 PMIC Laxman Dewangan
2013-10-02 15:50 ` [PATCH V5 2/3] pincntrl: add support for ams AS3722 pin control driver Laxman Dewangan
@ 2013-10-02 15:50 ` Laxman Dewangan
2 siblings, 0 replies; 9+ messages in thread
From: Laxman Dewangan @ 2013-10-02 15:50 UTC (permalink / raw)
To: lee.jones, sameo, broonie, linus.walleij, akpm
Cc: devicetree, linux-doc, linux-kernel, linux-gpio, rtc-linux,
rob.herring, mark.rutland, pawel.moll, swarren, rob,
ijc+devicetree, grant.likely, Laxman Dewangan, Florian Lobmaier
The ams AS3722 is a compact system PMU suitable for mobile phones,
tablets etc.
Add a driver to support accessing the RTC found on the ams AS3722
PMIC using RTC framework.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Florian Lobmaier <florian.lobmaier@ams.com>
---
Changes from V1:
- Get rid of clk32k out configuration from RTC. Will add clock driver.
Changes from V2:
- None.
Changes form V3:
- Change AMS to ams.
drivers/rtc/Kconfig | 10 ++
drivers/rtc/Makefile | 1 +
drivers/rtc/rtc-as3722.c | 296 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 307 insertions(+), 0 deletions(-)
create mode 100644 drivers/rtc/rtc-as3722.c
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 9654aa3..d8785d7 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -153,6 +153,16 @@ config RTC_DRV_88PM80X
This driver can also be built as a module. If so, the module
will be called rtc-88pm80x.
+config RTC_DRV_AS3722
+ tristate "ams AS3722 RTC driver"
+ depends on MFD_AS3722
+ help
+ If you say yes here you get support for the RTC of ams AS3722 PMIC
+ chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-as3722.
+
config RTC_DRV_DS1307
tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025"
help
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 2dff3d2..fdb5764 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_RTC_DRV_88PM860X) += rtc-88pm860x.o
obj-$(CONFIG_RTC_DRV_88PM80X) += rtc-88pm80x.o
obj-$(CONFIG_RTC_DRV_AB3100) += rtc-ab3100.o
obj-$(CONFIG_RTC_DRV_AB8500) += rtc-ab8500.o
+obj-$(CONFIG_RTC_DRV_AS3722) += rtc-as3722.o
obj-$(CONFIG_RTC_DRV_AT32AP700X)+= rtc-at32ap700x.o
obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o
obj-$(CONFIG_RTC_DRV_AT91SAM9) += rtc-at91sam9.o
diff --git a/drivers/rtc/rtc-as3722.c b/drivers/rtc/rtc-as3722.c
new file mode 100644
index 0000000..430a927
--- /dev/null
+++ b/drivers/rtc/rtc-as3722.c
@@ -0,0 +1,296 @@
+/*
+ * rtc-as3722.c - Real Time Clock driver for ams AS3722 PMICs
+ *
+ * Copyright (C) 2013 ams AG
+ * Copyright (c) 2013, NVIDIA Corporation. All rights reserved.
+ *
+ * Author: Florian Lobmaier <florian.lobmaier@ams.com>
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/bcd.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/ioctl.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mfd/as3722.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/time.h>
+
+#define AS3722_RTC_START_YEAR 2000
+struct as3722_rtc {
+ struct rtc_device *rtc;
+ struct device *dev;
+ struct as3722 *as3722;
+ int alarm_irq;
+ bool irq_enable;
+};
+
+static void as3722_time_to_reg(u8 *rbuff, struct rtc_time *tm)
+{
+ rbuff[0] = bin2bcd(tm->tm_sec);
+ rbuff[1] = bin2bcd(tm->tm_min);
+ rbuff[2] = bin2bcd(tm->tm_hour);
+ rbuff[3] = bin2bcd(tm->tm_mday);
+ rbuff[4] = bin2bcd(tm->tm_mon);
+ rbuff[5] = bin2bcd(tm->tm_year - (AS3722_RTC_START_YEAR - 1900));
+}
+
+static void as3722_reg_to_time(u8 *rbuff, struct rtc_time *tm)
+{
+ tm->tm_sec = bcd2bin(rbuff[0] & 0x7F);
+ tm->tm_min = bcd2bin(rbuff[1] & 0x7F);
+ tm->tm_hour = bcd2bin(rbuff[2] & 0x3F);
+ tm->tm_mday = bcd2bin(rbuff[3] & 0x3F);
+ tm->tm_mon = bcd2bin(rbuff[4] & 0x1F);
+ tm->tm_year = (AS3722_RTC_START_YEAR - 1900) + bcd2bin(rbuff[5] & 0x7F);
+ return;
+}
+
+static int as3722_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev);
+ struct as3722 *as3722 = as3722_rtc->as3722;
+ u8 as_time_array[6];
+ int ret;
+
+ ret = as3722_block_read(as3722, AS3722_RTC_SECOND_REG,
+ 6, as_time_array);
+ if (ret < 0) {
+ dev_err(dev, "RTC_SECOND reg block read failed %d\n", ret);
+ return ret;
+ }
+ as3722_reg_to_time(as_time_array, tm);
+ return 0;
+}
+
+static int as3722_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev);
+ struct as3722 *as3722 = as3722_rtc->as3722;
+ u8 as_time_array[6];
+ int ret;
+
+ if (tm->tm_year < (AS3722_RTC_START_YEAR - 1900))
+ return -EINVAL;
+
+ as3722_time_to_reg(as_time_array, tm);
+ ret = as3722_block_write(as3722, AS3722_RTC_SECOND_REG, 6,
+ as_time_array);
+ if (ret < 0)
+ dev_err(dev, "RTC_SECOND reg block write failed %d\n", ret);
+ return ret;
+}
+
+static int as3722_rtc_alarm_irq_enable(struct device *dev,
+ unsigned int enabled)
+{
+ struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev);
+
+ if (enabled && !as3722_rtc->irq_enable) {
+ enable_irq(as3722_rtc->alarm_irq);
+ as3722_rtc->irq_enable = true;
+ } else if (!enabled && as3722_rtc->irq_enable) {
+ disable_irq(as3722_rtc->alarm_irq);
+ as3722_rtc->irq_enable = false;
+ }
+ return 0;
+}
+
+static int as3722_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev);
+ struct as3722 *as3722 = as3722_rtc->as3722;
+ u8 as_time_array[6];
+ int ret;
+
+ ret = as3722_block_read(as3722, AS3722_RTC_ALARM_SECOND_REG, 6,
+ as_time_array);
+ if (ret < 0) {
+ dev_err(dev, "RTC_ALARM_SECOND block read failed %d\n", ret);
+ return ret;
+ }
+
+ as3722_reg_to_time(as_time_array, &alrm->time);
+ return 0;
+}
+
+static int as3722_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev);
+ struct as3722 *as3722 = as3722_rtc->as3722;
+ u8 as_time_array[6];
+ int ret;
+
+ if (alrm->time.tm_year < (AS3722_RTC_START_YEAR - 1900))
+ return -EINVAL;
+
+ ret = as3722_rtc_alarm_irq_enable(dev, 0);
+ if (ret < 0) {
+ dev_err(dev, "Disable RTC alarm failed\n");
+ return ret;
+ }
+
+ as3722_time_to_reg(as_time_array, &alrm->time);
+ ret = as3722_block_write(as3722, AS3722_RTC_ALARM_SECOND_REG, 6,
+ as_time_array);
+ if (ret < 0) {
+ dev_err(dev, "RTC_ALARM_SECOND block write failed %d\n", ret);
+ return ret;
+ }
+
+ if (alrm->enabled)
+ ret = as3722_rtc_alarm_irq_enable(dev, alrm->enabled);
+ return ret;
+}
+
+static irqreturn_t as3722_alarm_irq(int irq, void *data)
+{
+ struct as3722_rtc *as3722_rtc = data;
+
+ rtc_update_irq(as3722_rtc->rtc, 1, RTC_IRQF | RTC_AF);
+ return IRQ_HANDLED;
+}
+
+static const struct rtc_class_ops as3722_rtc_ops = {
+ .read_time = as3722_rtc_read_time,
+ .set_time = as3722_rtc_set_time,
+ .read_alarm = as3722_rtc_read_alarm,
+ .set_alarm = as3722_rtc_set_alarm,
+ .alarm_irq_enable = as3722_rtc_alarm_irq_enable,
+};
+
+static int as3722_rtc_probe(struct platform_device *pdev)
+{
+ struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent);
+ struct as3722_rtc *as3722_rtc;
+ int val;
+ int ret;
+
+ as3722_rtc = devm_kzalloc(&pdev->dev, sizeof(*as3722_rtc), GFP_KERNEL);
+ if (!as3722_rtc)
+ return -ENOMEM;
+
+ as3722_rtc->as3722 = as3722;
+ as3722_rtc->dev = &pdev->dev;
+ platform_set_drvdata(pdev, as3722_rtc);
+
+ /* Enable the RTC to make sure it is running. */
+ ret = as3722_update_bits(as3722, AS3722_RTC_CONTROL_REG,
+ AS3722_RTC_ON, AS3722_RTC_ON);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "RTC_CONTROL reg update failed: %d\n", ret);
+ return ret;
+ }
+
+ val = AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN;
+ ret = as3722_write(as3722, AS3722_RTC_CONTROL_REG, val);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "RTC_CONTROL reg write failed: %d\n", ret);
+ return ret;
+ }
+
+ device_init_wakeup(&pdev->dev, 1);
+
+ as3722_rtc->rtc = rtc_device_register("as3722", &pdev->dev,
+ &as3722_rtc_ops, THIS_MODULE);
+ if (IS_ERR(as3722_rtc->rtc)) {
+ ret = PTR_ERR(as3722_rtc->rtc);
+ dev_err(&pdev->dev, "RTC register failed: %d\n", ret);
+ return ret;
+ }
+
+ as3722_rtc->alarm_irq = platform_get_irq(pdev, 0);
+ dev_info(&pdev->dev, "RTC interrupt %d\n", as3722_rtc->alarm_irq);
+
+ ret = request_threaded_irq(as3722_rtc->alarm_irq, NULL,
+ as3722_alarm_irq, IRQF_ONESHOT | IRQF_EARLY_RESUME,
+ "rtc-alarm", as3722_rtc);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to request alarm IRQ %d: %d\n",
+ as3722_rtc->alarm_irq, ret);
+ goto scrub;
+ }
+ disable_irq(as3722_rtc->alarm_irq);
+ return 0;
+scrub:
+ rtc_device_unregister(as3722_rtc->rtc);
+ return ret;
+}
+
+static int as3722_rtc_remove(struct platform_device *pdev)
+{
+ struct as3722_rtc *as3722_rtc = platform_get_drvdata(pdev);
+
+ free_irq(as3722_rtc->alarm_irq, as3722_rtc);
+ rtc_device_unregister(as3722_rtc->rtc);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int as3722_rtc_suspend(struct device *dev)
+{
+ struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(as3722_rtc->alarm_irq);
+
+ return 0;
+}
+
+static int as3722_rtc_resume(struct device *dev)
+{
+ struct as3722_rtc *as3722_rtc = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(as3722_rtc->alarm_irq);
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops as3722_rtc_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(as3722_rtc_suspend, as3722_rtc_resume)
+};
+
+static const struct of_device_id of_as3722_rtc_match[] = {
+ { .compatible = "ams,as3722-rtc"},
+ { },
+};
+MODULE_DEVICE_TABLE(of, of_as3722_rtc_match);
+
+static struct platform_driver as3722_rtc_driver = {
+ .probe = as3722_rtc_probe,
+ .remove = as3722_rtc_remove,
+ .driver = {
+ .name = "as3722-rtc",
+ .pm = &as3722_rtc_pm_ops,
+ .of_match_table = of_as3722_rtc_match,
+ },
+};
+module_platform_driver(as3722_rtc_driver);
+
+MODULE_DESCRIPTION("RTC driver for AS3722 PMICs");
+MODULE_ALIAS("platform:as3722-rtc");
+MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_LICENSE("GPL");
--
1.7.1.1
^ permalink raw reply related [flat|nested] 9+ messages in thread