![Andreas Kemnade](/assets/img/avatar_default.png)
_opp_supported_by_regulators() wrongly ignored errors from regulator_is_supported_voltage(), so it considered errors as success. Since commit4982094451
("regulator: core: simplify return value on suported_voltage") regulator_is_supported_voltage() returns a real boolean, so errors make _opp_supported_by_regulators() return false. That reveals a problem with the declaration of the VDD1/2 regulators on twl4030. The VDD1/VDD2 regulators on twl4030 are neither defined with voltage lists nor with the continuous flag set, so regulator_is_supported_voltage() returns false and an error before above mentioned commit (which was considered success) The result is that after the above mentioned commit cpufreq does not work properly e.g. dm3730. [ 2.490997] core: _opp_supported_by_regulators: OPP minuV: 1012500 maxuV: 1012500, not supported by regulator [ 2.501617] cpu cpu0: _opp_add: OPP not supported by regulators (300000000) [ 2.509246] core: _opp_supported_by_regulators: OPP minuV: 1200000 maxuV: 1200000, not supported by regulator [ 2.519775] cpu cpu0: _opp_add: OPP not supported by regulators (600000000) [ 2.527313] core: _opp_supported_by_regulators: OPP minuV: 1325000 maxuV: 1325000, not supported by regulator [ 2.537750] cpu cpu0: _opp_add: OPP not supported by regulators (800000000) The patch fixes declaration of VDD1/2 regulators by adding proper voltage lists. Fixes:4982094451
("regulator: core: simplify return value on suported_voltage") Cc: stable@vger.kernel.org Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Tested-by: Adam Ford <aford173@gmail.com> #logicpd-torpedo-37xx-devkit Link: https://lore.kernel.org/r/20190814214319.24087-1-andreas@kemnade.info Signed-off-by: Mark Brown <broonie@kernel.org>
683 lines
18 KiB
C
683 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* twl-regulator.c -- support regulators in twl4030/twl6030 family chips
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*
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* Copyright (C) 2008 David Brownell
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*/
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/mfd/twl.h>
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#include <linux/delay.h>
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/*
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* The TWL4030/TW5030/TPS659x0 family chips include power management, a
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* USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions
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* include an audio codec, battery charger, and more voltage regulators.
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* These chips are often used in OMAP-based systems.
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*
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* This driver implements software-based resource control for various
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* voltage regulators. This is usually augmented with state machine
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* based control.
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*/
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struct twlreg_info {
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/* start of regulator's PM_RECEIVER control register bank */
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u8 base;
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/* twl resource ID, for resource control state machine */
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u8 id;
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/* voltage in mV = table[VSEL]; table_len must be a power-of-two */
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u8 table_len;
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const u16 *table;
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/* State REMAP default configuration */
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u8 remap;
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/* used by regulator core */
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struct regulator_desc desc;
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/* chip specific features */
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unsigned long features;
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/* data passed from board for external get/set voltage */
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void *data;
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};
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/* LDO control registers ... offset is from the base of its register bank.
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* The first three registers of all power resource banks help hardware to
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* manage the various resource groups.
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*/
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/* Common offset in TWL4030/6030 */
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#define VREG_GRP 0
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/* TWL4030 register offsets */
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#define VREG_TYPE 1
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#define VREG_REMAP 2
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#define VREG_DEDICATED 3 /* LDO control */
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#define VREG_VOLTAGE_SMPS_4030 9
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/* TWL6030 register offsets */
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#define VREG_TRANS 1
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#define VREG_STATE 2
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#define VREG_VOLTAGE 3
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#define VREG_VOLTAGE_SMPS 4
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static inline int
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twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset)
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{
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u8 value;
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int status;
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status = twl_i2c_read_u8(slave_subgp,
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&value, info->base + offset);
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return (status < 0) ? status : value;
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}
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static inline int
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twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset,
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u8 value)
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{
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return twl_i2c_write_u8(slave_subgp,
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value, info->base + offset);
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}
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/*----------------------------------------------------------------------*/
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/* generic power resource operations, which work on all regulators */
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static int twlreg_grp(struct regulator_dev *rdev)
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{
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return twlreg_read(rdev_get_drvdata(rdev), TWL_MODULE_PM_RECEIVER,
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VREG_GRP);
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}
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/*
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* Enable/disable regulators by joining/leaving the P1 (processor) group.
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* We assume nobody else is updating the DEV_GRP registers.
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*/
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/* definition for 4030 family */
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#define P3_GRP_4030 BIT(7) /* "peripherals" */
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#define P2_GRP_4030 BIT(6) /* secondary processor, modem, etc */
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#define P1_GRP_4030 BIT(5) /* CPU/Linux */
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/* definition for 6030 family */
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#define P3_GRP_6030 BIT(2) /* secondary processor, modem, etc */
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#define P2_GRP_6030 BIT(1) /* "peripherals" */
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#define P1_GRP_6030 BIT(0) /* CPU/Linux */
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static int twl4030reg_is_enabled(struct regulator_dev *rdev)
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{
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int state = twlreg_grp(rdev);
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if (state < 0)
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return state;
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return state & P1_GRP_4030;
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}
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#define PB_I2C_BUSY BIT(0)
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#define PB_I2C_BWEN BIT(1)
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/* Wait until buffer empty/ready to send a word on power bus. */
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static int twl4030_wait_pb_ready(void)
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{
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int ret;
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int timeout = 10;
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u8 val;
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do {
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ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
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TWL4030_PM_MASTER_PB_CFG);
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if (ret < 0)
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return ret;
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if (!(val & PB_I2C_BUSY))
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return 0;
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mdelay(1);
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timeout--;
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} while (timeout);
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return -ETIMEDOUT;
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}
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/* Send a word over the powerbus */
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static int twl4030_send_pb_msg(unsigned msg)
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{
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u8 val;
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int ret;
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/* save powerbus configuration */
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ret = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
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TWL4030_PM_MASTER_PB_CFG);
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if (ret < 0)
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return ret;
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/* Enable i2c access to powerbus */
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ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val | PB_I2C_BWEN,
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TWL4030_PM_MASTER_PB_CFG);
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if (ret < 0)
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return ret;
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ret = twl4030_wait_pb_ready();
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if (ret < 0)
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return ret;
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ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, msg >> 8,
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TWL4030_PM_MASTER_PB_WORD_MSB);
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if (ret < 0)
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return ret;
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ret = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, msg & 0xff,
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TWL4030_PM_MASTER_PB_WORD_LSB);
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if (ret < 0)
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return ret;
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ret = twl4030_wait_pb_ready();
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if (ret < 0)
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return ret;
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/* Restore powerbus configuration */
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return twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
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TWL4030_PM_MASTER_PB_CFG);
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}
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static int twl4030reg_enable(struct regulator_dev *rdev)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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int grp;
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int ret;
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grp = twlreg_grp(rdev);
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if (grp < 0)
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return grp;
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grp |= P1_GRP_4030;
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ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
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return ret;
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}
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static int twl4030reg_disable(struct regulator_dev *rdev)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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int grp;
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int ret;
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grp = twlreg_grp(rdev);
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if (grp < 0)
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return grp;
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grp &= ~(P1_GRP_4030 | P2_GRP_4030 | P3_GRP_4030);
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ret = twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_GRP, grp);
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return ret;
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}
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static int twl4030reg_get_status(struct regulator_dev *rdev)
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{
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int state = twlreg_grp(rdev);
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if (state < 0)
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return state;
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state &= 0x0f;
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/* assume state != WARM_RESET; we'd not be running... */
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if (!state)
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return REGULATOR_STATUS_OFF;
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return (state & BIT(3))
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? REGULATOR_STATUS_NORMAL
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: REGULATOR_STATUS_STANDBY;
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}
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static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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unsigned message;
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/* We can only set the mode through state machine commands... */
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switch (mode) {
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case REGULATOR_MODE_NORMAL:
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message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
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break;
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case REGULATOR_MODE_STANDBY:
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message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
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break;
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default:
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return -EINVAL;
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}
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return twl4030_send_pb_msg(message);
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}
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static inline unsigned int twl4030reg_map_mode(unsigned int mode)
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{
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switch (mode) {
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case RES_STATE_ACTIVE:
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return REGULATOR_MODE_NORMAL;
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case RES_STATE_SLEEP:
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return REGULATOR_MODE_STANDBY;
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default:
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return REGULATOR_MODE_INVALID;
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}
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}
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/*----------------------------------------------------------------------*/
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/*
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* Support for adjustable-voltage LDOs uses a four bit (or less) voltage
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* select field in its control register. We use tables indexed by VSEL
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* to record voltages in milliVolts. (Accuracy is about three percent.)
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*
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* Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
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* currently handled by listing two slightly different VAUX2 regulators,
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* only one of which will be configured.
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*
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* VSEL values documented as "TI cannot support these values" are flagged
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* in these tables as UNSUP() values; we normally won't assign them.
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*
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* VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
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* TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
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*/
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#define UNSUP_MASK 0x8000
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#define UNSUP(x) (UNSUP_MASK | (x))
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#define IS_UNSUP(info, x) \
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((UNSUP_MASK & (x)) && \
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!((info)->features & TWL4030_ALLOW_UNSUPPORTED))
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#define LDO_MV(x) (~UNSUP_MASK & (x))
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static const u16 VAUX1_VSEL_table[] = {
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UNSUP(1500), UNSUP(1800), 2500, 2800,
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3000, 3000, 3000, 3000,
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};
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static const u16 VAUX2_4030_VSEL_table[] = {
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UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
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1500, 1800, UNSUP(1850), 2500,
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UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
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UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
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};
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static const u16 VAUX2_VSEL_table[] = {
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1700, 1700, 1900, 1300,
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1500, 1800, 2000, 2500,
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2100, 2800, 2200, 2300,
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2400, 2400, 2400, 2400,
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};
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static const u16 VAUX3_VSEL_table[] = {
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1500, 1800, 2500, 2800,
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3000, 3000, 3000, 3000,
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};
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static const u16 VAUX4_VSEL_table[] = {
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700, 1000, 1200, UNSUP(1300),
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1500, 1800, UNSUP(1850), 2500,
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UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
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UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
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};
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static const u16 VMMC1_VSEL_table[] = {
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1850, 2850, 3000, 3150,
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};
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static const u16 VMMC2_VSEL_table[] = {
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UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
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UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
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2600, 2800, 2850, 3000,
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3150, 3150, 3150, 3150,
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};
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static const u16 VPLL1_VSEL_table[] = {
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1000, 1200, 1300, 1800,
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UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
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};
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static const u16 VPLL2_VSEL_table[] = {
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700, 1000, 1200, 1300,
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UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
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UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
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UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
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};
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static const u16 VSIM_VSEL_table[] = {
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UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
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2800, 3000, 3000, 3000,
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};
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static const u16 VDAC_VSEL_table[] = {
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1200, 1300, 1800, 1800,
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};
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static const u16 VIO_VSEL_table[] = {
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1800, 1850,
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};
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static const u16 VINTANA2_VSEL_table[] = {
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2500, 2750,
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};
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/* 600mV to 1450mV in 12.5 mV steps */
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static const struct regulator_linear_range VDD1_ranges[] = {
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REGULATOR_LINEAR_RANGE(600000, 0, 68, 12500)
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};
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/* 600mV to 1450mV in 12.5 mV steps, everything above = 1500mV */
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static const struct regulator_linear_range VDD2_ranges[] = {
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REGULATOR_LINEAR_RANGE(600000, 0, 68, 12500),
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REGULATOR_LINEAR_RANGE(1500000, 69, 69, 12500)
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};
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static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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int mV = info->table[index];
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return IS_UNSUP(info, mV) ? 0 : (LDO_MV(mV) * 1000);
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}
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static int
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twl4030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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return twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE,
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selector);
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}
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static int twl4030ldo_get_voltage_sel(struct regulator_dev *rdev)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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int vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE);
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if (vsel < 0)
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return vsel;
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vsel &= info->table_len - 1;
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return vsel;
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}
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static const struct regulator_ops twl4030ldo_ops = {
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.list_voltage = twl4030ldo_list_voltage,
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.set_voltage_sel = twl4030ldo_set_voltage_sel,
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.get_voltage_sel = twl4030ldo_get_voltage_sel,
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.enable = twl4030reg_enable,
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.disable = twl4030reg_disable,
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.is_enabled = twl4030reg_is_enabled,
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.set_mode = twl4030reg_set_mode,
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.get_status = twl4030reg_get_status,
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};
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static int
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twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
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unsigned *selector)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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int vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
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twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_VOLTAGE_SMPS_4030, vsel);
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return 0;
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}
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static int twl4030smps_get_voltage(struct regulator_dev *rdev)
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{
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struct twlreg_info *info = rdev_get_drvdata(rdev);
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int vsel;
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vsel = twlreg_read(info, TWL_MODULE_PM_RECEIVER,
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VREG_VOLTAGE_SMPS_4030);
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return vsel * 12500 + 600000;
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}
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static const struct regulator_ops twl4030smps_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.set_voltage = twl4030smps_set_voltage,
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.get_voltage = twl4030smps_get_voltage,
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};
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/*----------------------------------------------------------------------*/
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static const struct regulator_ops twl4030fixed_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.enable = twl4030reg_enable,
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.disable = twl4030reg_disable,
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.is_enabled = twl4030reg_is_enabled,
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.set_mode = twl4030reg_set_mode,
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.get_status = twl4030reg_get_status,
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};
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/*----------------------------------------------------------------------*/
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#define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) \
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static const struct twlreg_info TWL4030_INFO_##label = { \
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.base = offset, \
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.id = num, \
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.table_len = ARRAY_SIZE(label##_VSEL_table), \
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.table = label##_VSEL_table, \
|
|
.remap = remap_conf, \
|
|
.desc = { \
|
|
.name = #label, \
|
|
.id = TWL4030_REG_##label, \
|
|
.n_voltages = ARRAY_SIZE(label##_VSEL_table), \
|
|
.ops = &twl4030ldo_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
.enable_time = turnon_delay, \
|
|
.of_map_mode = twl4030reg_map_mode, \
|
|
}, \
|
|
}
|
|
|
|
#define TWL4030_ADJUSTABLE_SMPS(label, offset, num, turnon_delay, remap_conf, \
|
|
n_volt) \
|
|
static const struct twlreg_info TWL4030_INFO_##label = { \
|
|
.base = offset, \
|
|
.id = num, \
|
|
.remap = remap_conf, \
|
|
.desc = { \
|
|
.name = #label, \
|
|
.id = TWL4030_REG_##label, \
|
|
.ops = &twl4030smps_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
.enable_time = turnon_delay, \
|
|
.of_map_mode = twl4030reg_map_mode, \
|
|
.n_voltages = n_volt, \
|
|
.n_linear_ranges = ARRAY_SIZE(label ## _ranges), \
|
|
.linear_ranges = label ## _ranges, \
|
|
}, \
|
|
}
|
|
|
|
#define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \
|
|
remap_conf) \
|
|
static const struct twlreg_info TWLFIXED_INFO_##label = { \
|
|
.base = offset, \
|
|
.id = num, \
|
|
.remap = remap_conf, \
|
|
.desc = { \
|
|
.name = #label, \
|
|
.id = TWL4030##_REG_##label, \
|
|
.n_voltages = 1, \
|
|
.ops = &twl4030fixed_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
.min_uV = mVolts * 1000, \
|
|
.enable_time = turnon_delay, \
|
|
.of_map_mode = twl4030reg_map_mode, \
|
|
}, \
|
|
}
|
|
|
|
/*
|
|
* We list regulators here if systems need some level of
|
|
* software control over them after boot.
|
|
*/
|
|
TWL4030_ADJUSTABLE_LDO(VAUX1, 0x17, 1, 100, 0x08);
|
|
TWL4030_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2, 100, 0x08);
|
|
TWL4030_ADJUSTABLE_LDO(VAUX2, 0x1b, 2, 100, 0x08);
|
|
TWL4030_ADJUSTABLE_LDO(VAUX3, 0x1f, 3, 100, 0x08);
|
|
TWL4030_ADJUSTABLE_LDO(VAUX4, 0x23, 4, 100, 0x08);
|
|
TWL4030_ADJUSTABLE_LDO(VMMC1, 0x27, 5, 100, 0x08);
|
|
TWL4030_ADJUSTABLE_LDO(VMMC2, 0x2b, 6, 100, 0x08);
|
|
TWL4030_ADJUSTABLE_LDO(VPLL1, 0x2f, 7, 100, 0x00);
|
|
TWL4030_ADJUSTABLE_LDO(VPLL2, 0x33, 8, 100, 0x08);
|
|
TWL4030_ADJUSTABLE_LDO(VSIM, 0x37, 9, 100, 0x00);
|
|
TWL4030_ADJUSTABLE_LDO(VDAC, 0x3b, 10, 100, 0x08);
|
|
TWL4030_ADJUSTABLE_LDO(VINTANA2, 0x43, 12, 100, 0x08);
|
|
TWL4030_ADJUSTABLE_LDO(VIO, 0x4b, 14, 1000, 0x08);
|
|
TWL4030_ADJUSTABLE_SMPS(VDD1, 0x55, 15, 1000, 0x08, 68);
|
|
TWL4030_ADJUSTABLE_SMPS(VDD2, 0x63, 16, 1000, 0x08, 69);
|
|
/* VUSBCP is managed *only* by the USB subchip */
|
|
TWL4030_FIXED_LDO(VINTANA1, 0x3f, 1500, 11, 100, 0x08);
|
|
TWL4030_FIXED_LDO(VINTDIG, 0x47, 1500, 13, 100, 0x08);
|
|
TWL4030_FIXED_LDO(VUSB1V5, 0x71, 1500, 17, 100, 0x08);
|
|
TWL4030_FIXED_LDO(VUSB1V8, 0x74, 1800, 18, 100, 0x08);
|
|
TWL4030_FIXED_LDO(VUSB3V1, 0x77, 3100, 19, 150, 0x08);
|
|
|
|
#define TWL_OF_MATCH(comp, family, label) \
|
|
{ \
|
|
.compatible = comp, \
|
|
.data = &family##_INFO_##label, \
|
|
}
|
|
|
|
#define TWL4030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL4030, label)
|
|
#define TWL6030_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6030, label)
|
|
#define TWL6032_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWL6032, label)
|
|
#define TWLFIXED_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLFIXED, label)
|
|
#define TWLSMPS_OF_MATCH(comp, label) TWL_OF_MATCH(comp, TWLSMPS, label)
|
|
|
|
static const struct of_device_id twl_of_match[] = {
|
|
TWL4030_OF_MATCH("ti,twl4030-vaux1", VAUX1),
|
|
TWL4030_OF_MATCH("ti,twl4030-vaux2", VAUX2_4030),
|
|
TWL4030_OF_MATCH("ti,twl5030-vaux2", VAUX2),
|
|
TWL4030_OF_MATCH("ti,twl4030-vaux3", VAUX3),
|
|
TWL4030_OF_MATCH("ti,twl4030-vaux4", VAUX4),
|
|
TWL4030_OF_MATCH("ti,twl4030-vmmc1", VMMC1),
|
|
TWL4030_OF_MATCH("ti,twl4030-vmmc2", VMMC2),
|
|
TWL4030_OF_MATCH("ti,twl4030-vpll1", VPLL1),
|
|
TWL4030_OF_MATCH("ti,twl4030-vpll2", VPLL2),
|
|
TWL4030_OF_MATCH("ti,twl4030-vsim", VSIM),
|
|
TWL4030_OF_MATCH("ti,twl4030-vdac", VDAC),
|
|
TWL4030_OF_MATCH("ti,twl4030-vintana2", VINTANA2),
|
|
TWL4030_OF_MATCH("ti,twl4030-vio", VIO),
|
|
TWL4030_OF_MATCH("ti,twl4030-vdd1", VDD1),
|
|
TWL4030_OF_MATCH("ti,twl4030-vdd2", VDD2),
|
|
TWLFIXED_OF_MATCH("ti,twl4030-vintana1", VINTANA1),
|
|
TWLFIXED_OF_MATCH("ti,twl4030-vintdig", VINTDIG),
|
|
TWLFIXED_OF_MATCH("ti,twl4030-vusb1v5", VUSB1V5),
|
|
TWLFIXED_OF_MATCH("ti,twl4030-vusb1v8", VUSB1V8),
|
|
TWLFIXED_OF_MATCH("ti,twl4030-vusb3v1", VUSB3V1),
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, twl_of_match);
|
|
|
|
static int twlreg_probe(struct platform_device *pdev)
|
|
{
|
|
int id;
|
|
struct twlreg_info *info;
|
|
const struct twlreg_info *template;
|
|
struct regulator_init_data *initdata;
|
|
struct regulation_constraints *c;
|
|
struct regulator_dev *rdev;
|
|
struct regulator_config config = { };
|
|
|
|
template = of_device_get_match_data(&pdev->dev);
|
|
if (!template)
|
|
return -ENODEV;
|
|
|
|
id = template->desc.id;
|
|
initdata = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
|
|
&template->desc);
|
|
if (!initdata)
|
|
return -EINVAL;
|
|
|
|
info = devm_kmemdup(&pdev->dev, template, sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
/* Constrain board-specific capabilities according to what
|
|
* this driver and the chip itself can actually do.
|
|
*/
|
|
c = &initdata->constraints;
|
|
c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
|
|
c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
|
|
| REGULATOR_CHANGE_MODE
|
|
| REGULATOR_CHANGE_STATUS;
|
|
switch (id) {
|
|
case TWL4030_REG_VIO:
|
|
case TWL4030_REG_VDD1:
|
|
case TWL4030_REG_VDD2:
|
|
case TWL4030_REG_VPLL1:
|
|
case TWL4030_REG_VINTANA1:
|
|
case TWL4030_REG_VINTANA2:
|
|
case TWL4030_REG_VINTDIG:
|
|
c->always_on = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
config.dev = &pdev->dev;
|
|
config.init_data = initdata;
|
|
config.driver_data = info;
|
|
config.of_node = pdev->dev.of_node;
|
|
|
|
rdev = devm_regulator_register(&pdev->dev, &info->desc, &config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&pdev->dev, "can't register %s, %ld\n",
|
|
info->desc.name, PTR_ERR(rdev));
|
|
return PTR_ERR(rdev);
|
|
}
|
|
platform_set_drvdata(pdev, rdev);
|
|
|
|
twlreg_write(info, TWL_MODULE_PM_RECEIVER, VREG_REMAP, info->remap);
|
|
|
|
/* NOTE: many regulators support short-circuit IRQs (presentable
|
|
* as REGULATOR_OVER_CURRENT notifications?) configured via:
|
|
* - SC_CONFIG
|
|
* - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
|
|
* - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
|
|
* - IT_CONFIG
|
|
*/
|
|
|
|
return 0;
|
|
}
|
|
|
|
MODULE_ALIAS("platform:twl4030_reg");
|
|
|
|
static struct platform_driver twlreg_driver = {
|
|
.probe = twlreg_probe,
|
|
/* NOTE: short name, to work around driver model truncation of
|
|
* "twl_regulator.12" (and friends) to "twl_regulator.1".
|
|
*/
|
|
.driver = {
|
|
.name = "twl4030_reg",
|
|
.of_match_table = of_match_ptr(twl_of_match),
|
|
},
|
|
};
|
|
|
|
static int __init twlreg_init(void)
|
|
{
|
|
return platform_driver_register(&twlreg_driver);
|
|
}
|
|
subsys_initcall(twlreg_init);
|
|
|
|
static void __exit twlreg_exit(void)
|
|
{
|
|
platform_driver_unregister(&twlreg_driver);
|
|
}
|
|
module_exit(twlreg_exit)
|
|
|
|
MODULE_DESCRIPTION("TWL4030 regulator driver");
|
|
MODULE_LICENSE("GPL");
|