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staging: regulator: add a regulator driver for HiSilicon 6421v600 SPMI PMIC
Add the regulator driver for the LDO lines provided by the HiSilicon 6421v600 SPMI PMIC device. [mchehab+huawei@kernel.org: keep just the regulator driver on this patch, renaming it to better fit at upstream namespace] The compete patch is at: https://github.com/96boards-hikey/linux/commit/08464419fba2 Signed-off-by: Mayulong <mayulong1@huawei.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/6e5f6a811edf77575ddaa84ab6542cc646024423.1597647359.git.mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mayulong
Greg Kroah-Hartman
parent
6b94669925
commit
42f24d9d44
741
drivers/staging/hikey9xx/hi6421v600-regulator.c
Normal file
741
drivers/staging/hikey9xx/hi6421v600-regulator.c
Normal file
@ -0,0 +1,741 @@
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/*
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* Device driver for regulators in Hisi IC
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*
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* Copyright (c) 2013 Linaro Ltd.
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* Copyright (c) 2011 Hisilicon.
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*
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* Guodong Xu <guodong.xu@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/io.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/of_address.h>
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#include <linux/regmap.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/hisi_pmic.h>
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#include <linux/delay.h>
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#include <linux/time.h>
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#include <linux/version.h>
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#ifdef CONFIG_HISI_PMIC_DEBUG
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#include <linux/debugfs.h>
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#endif
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include <linux/spmi.h>
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#if 1
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#define BRAND_DEBUG(args...) pr_debug(args);
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#else
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#define BRAND_DEBUG(args...)
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#endif
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struct hisi_regulator_register_info {
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u32 ctrl_reg;
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u32 enable_mask;
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u32 eco_mode_mask;
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u32 vset_reg;
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u32 vset_mask;
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};
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struct hisi_regulator {
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const char *name;
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struct hisi_regulator_register_info register_info;
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struct timeval last_off_time;
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u32 off_on_delay;
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u32 eco_uA;
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struct regulator_desc rdesc;
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int (*dt_parse)(struct hisi_regulator *, struct spmi_device *);
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};
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static DEFINE_MUTEX(enable_mutex);
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struct timeval last_enabled;
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static inline struct hisi_pmic *rdev_to_pmic(struct regulator_dev *dev)
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{
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/* regulator_dev parent to->
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* hisi regulator platform device_dev parent to->
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* hisi pmic platform device_dev
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*/
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return dev_get_drvdata(rdev_get_dev(dev)->parent->parent);
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}
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/* helper function to ensure when it returns it is at least 'delay_us'
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* microseconds after 'since'.
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*/
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static void ensured_time_after(struct timeval since, u32 delay_us)
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{
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struct timeval now;
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u64 elapsed_ns64, delay_ns64;
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u32 actual_us32;
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delay_ns64 = delay_us * NSEC_PER_USEC;
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do_gettimeofday(&now);
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elapsed_ns64 = timeval_to_ns(&now) - timeval_to_ns(&since);
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if (delay_ns64 > elapsed_ns64) {
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actual_us32 = ((u32)(delay_ns64 - elapsed_ns64) /
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NSEC_PER_USEC);
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if (actual_us32 >= 1000) {
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mdelay(actual_us32 / 1000); /*lint !e647 */
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udelay(actual_us32 % 1000);
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} else if (actual_us32 > 0) {
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udelay(actual_us32);
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}
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}
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return;
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}
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static int hisi_regulator_is_enabled(struct regulator_dev *dev)
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{
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u32 reg_val;
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struct hisi_regulator *sreg = rdev_get_drvdata(dev);
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struct hisi_pmic *pmic = rdev_to_pmic(dev);
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reg_val = hisi_pmic_read(pmic, sreg->register_info.ctrl_reg);
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BRAND_DEBUG("<[%s]: ctrl_reg=0x%x,enable_state=%d>\n", __func__, sreg->register_info.ctrl_reg,\
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(reg_val & sreg->register_info.enable_mask));
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return ((reg_val & sreg->register_info.enable_mask) != 0);
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}
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static int hisi_regulator_enable(struct regulator_dev *dev)
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{
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struct hisi_regulator *sreg = rdev_get_drvdata(dev);
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struct hisi_pmic *pmic = rdev_to_pmic(dev);
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/* keep a distance of off_on_delay from last time disabled */
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ensured_time_after(sreg->last_off_time, sreg->off_on_delay);
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BRAND_DEBUG("<[%s]: off_on_delay=%dus>\n", __func__, sreg->off_on_delay);
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/* cannot enable more than one regulator at one time */
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mutex_lock(&enable_mutex);
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ensured_time_after(last_enabled, HISI_REGS_ENA_PROTECT_TIME);
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/* set enable register */
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hisi_pmic_rmw(pmic, sreg->register_info.ctrl_reg,
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sreg->register_info.enable_mask,
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sreg->register_info.enable_mask);
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BRAND_DEBUG("<[%s]: ctrl_reg=0x%x,enable_mask=0x%x>\n", __func__, sreg->register_info.ctrl_reg,\
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sreg->register_info.enable_mask);
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do_gettimeofday(&last_enabled);
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mutex_unlock(&enable_mutex);
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return 0;
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}
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static int hisi_regulator_disable(struct regulator_dev *dev)
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{
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struct hisi_regulator *sreg = rdev_get_drvdata(dev);
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struct hisi_pmic *pmic = rdev_to_pmic(dev);
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/* set enable register to 0 */
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hisi_pmic_rmw(pmic, sreg->register_info.ctrl_reg,
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sreg->register_info.enable_mask, 0);
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do_gettimeofday(&sreg->last_off_time);
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return 0;
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}
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static int hisi_regulator_get_voltage(struct regulator_dev *dev)
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{
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struct hisi_regulator *sreg = rdev_get_drvdata(dev);
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struct hisi_pmic *pmic = rdev_to_pmic(dev);
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u32 reg_val, selector;
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/* get voltage selector */
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reg_val = hisi_pmic_read(pmic, sreg->register_info.vset_reg);
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BRAND_DEBUG("<[%s]: vset_reg=0x%x>\n", __func__, sreg->register_info.vset_reg);
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selector = (reg_val & sreg->register_info.vset_mask) >>
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(ffs(sreg->register_info.vset_mask) - 1);
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return sreg->rdesc.ops->list_voltage(dev, selector);
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}
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static int hisi_regulator_set_voltage(struct regulator_dev *dev,
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int min_uV, int max_uV, unsigned *selector)
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{
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struct hisi_regulator *sreg = rdev_get_drvdata(dev);
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struct hisi_pmic *pmic = rdev_to_pmic(dev);
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u32 vsel;
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int ret = 0;
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for (vsel = 0; vsel < sreg->rdesc.n_voltages; vsel++) {
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int uV = sreg->rdesc.volt_table[vsel];
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/* Break at the first in-range value */
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if (min_uV <= uV && uV <= max_uV)
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break;
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}
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/* unlikely to happen. sanity test done by regulator core */
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if (unlikely(vsel == sreg->rdesc.n_voltages))
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return -EINVAL;
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*selector = vsel;
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/* set voltage selector */
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hisi_pmic_rmw(pmic, sreg->register_info.vset_reg,
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sreg->register_info.vset_mask,
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vsel << (ffs(sreg->register_info.vset_mask) - 1));
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BRAND_DEBUG("<[%s]: vset_reg=0x%x, vset_mask=0x%x, value=0x%x>\n", __func__,\
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sreg->register_info.vset_reg,\
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sreg->register_info.vset_mask,\
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vsel << (ffs(sreg->register_info.vset_mask) - 1)\
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);
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return ret;
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}
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static unsigned int hisi_regulator_get_mode(struct regulator_dev *dev)
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{
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struct hisi_regulator *sreg = rdev_get_drvdata(dev);
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struct hisi_pmic *pmic = rdev_to_pmic(dev);
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u32 reg_val;
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reg_val = hisi_pmic_read(pmic, sreg->register_info.ctrl_reg);
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BRAND_DEBUG("<[%s]: reg_val=%d, ctrl_reg=0x%x, eco_mode_mask=0x%x>\n", __func__, reg_val,\
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sreg->register_info.ctrl_reg,\
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sreg->register_info.eco_mode_mask\
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);
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if (reg_val & sreg->register_info.eco_mode_mask)
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return REGULATOR_MODE_IDLE;
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else
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return REGULATOR_MODE_NORMAL;
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}
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static int hisi_regulator_set_mode(struct regulator_dev *dev,
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unsigned int mode)
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{
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struct hisi_regulator *sreg = rdev_get_drvdata(dev);
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struct hisi_pmic *pmic = rdev_to_pmic(dev);
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u32 eco_mode;
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switch (mode) {
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case REGULATOR_MODE_NORMAL:
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eco_mode = HISI_ECO_MODE_DISABLE;
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break;
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case REGULATOR_MODE_IDLE:
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eco_mode = HISI_ECO_MODE_ENABLE;
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break;
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default:
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return -EINVAL;
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}
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/* set mode */
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hisi_pmic_rmw(pmic, sreg->register_info.ctrl_reg,
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sreg->register_info.eco_mode_mask,
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eco_mode << (ffs(sreg->register_info.eco_mode_mask) - 1));
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BRAND_DEBUG("<[%s]: ctrl_reg=0x%x, eco_mode_mask=0x%x, value=0x%x>\n", __func__,\
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sreg->register_info.ctrl_reg,\
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sreg->register_info.eco_mode_mask,\
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eco_mode << (ffs(sreg->register_info.eco_mode_mask) - 1)\
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);
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return 0;
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}
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unsigned int hisi_regulator_get_optimum_mode(struct regulator_dev *dev,
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int input_uV, int output_uV, int load_uA)
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{
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struct hisi_regulator *sreg = rdev_get_drvdata(dev);
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if ((load_uA == 0) || ((unsigned int)load_uA > sreg->eco_uA))
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return REGULATOR_MODE_NORMAL;
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else
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return REGULATOR_MODE_IDLE;
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}
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static int hisi_dt_parse_common(struct hisi_regulator *sreg,
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struct spmi_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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struct regulator_desc *rdesc = &sreg->rdesc;
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unsigned int register_info[3] = {0};
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int ret = 0;
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/* parse .register_info.ctrl_reg */
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ret = of_property_read_u32_array(np, "hisilicon,hisi-ctrl",
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register_info, 3);
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if (ret) {
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dev_err(dev, "no hisilicon,hisi-ctrl property set\n");
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goto dt_parse_common_end;
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}
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sreg->register_info.ctrl_reg = register_info[0];
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sreg->register_info.enable_mask = register_info[1];
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sreg->register_info.eco_mode_mask = register_info[2];
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/* parse .register_info.vset_reg */
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ret = of_property_read_u32_array(np, "hisilicon,hisi-vset",
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register_info, 2);
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if (ret) {
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dev_err(dev, "no hisilicon,hisi-vset property set\n");
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goto dt_parse_common_end;
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}
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sreg->register_info.vset_reg = register_info[0];
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sreg->register_info.vset_mask = register_info[1];
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/* parse .off-on-delay */
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ret = of_property_read_u32(np, "hisilicon,hisi-off-on-delay-us",
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&sreg->off_on_delay);
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if (ret) {
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dev_err(dev, "no hisilicon,hisi-off-on-delay-us property set\n");
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goto dt_parse_common_end;
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}
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/* parse .enable_time */
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ret = of_property_read_u32(np, "hisilicon,hisi-enable-time-us",
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&rdesc->enable_time);
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if (ret) {
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dev_err(dev, "no hisilicon,hisi-enable-time-us property set\n");
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goto dt_parse_common_end;
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}
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/* parse .eco_uA */
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ret = of_property_read_u32(np, "hisilicon,hisi-eco-microamp",
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&sreg->eco_uA);
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if (ret) {
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sreg->eco_uA = 0;
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ret = 0;
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}
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dt_parse_common_end:
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return ret;
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}
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static int hisi_dt_parse_ldo(struct hisi_regulator *sreg,
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struct spmi_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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struct regulator_desc *rdesc = &sreg->rdesc;
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unsigned int *v_table;
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int ret = 0;
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/* parse .n_voltages, and .volt_table */
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ret = of_property_read_u32(np, "hisilicon,hisi-n-voltages",
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&rdesc->n_voltages);
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if (ret) {
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dev_err(dev, "no hisilicon,hisi-n-voltages property set\n");
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goto dt_parse_ldo_end;
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}
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/* alloc space for .volt_table */
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v_table = devm_kzalloc(dev, sizeof(unsigned int) * rdesc->n_voltages,
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GFP_KERNEL);
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if (unlikely(!v_table)) {
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ret = -ENOMEM;
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dev_err(dev, "no memory for .volt_table\n");
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goto dt_parse_ldo_end;
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}
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ret = of_property_read_u32_array(np, "hisilicon,hisi-vset-table",
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v_table, rdesc->n_voltages);
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if (ret) {
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dev_err(dev, "no hisilicon,hisi-vset-table property set\n");
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goto dt_parse_ldo_end1;
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}
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rdesc->volt_table = v_table;
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/* parse hisi regulator's dt common part */
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ret = hisi_dt_parse_common(sreg, pdev);
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if (ret) {
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dev_err(dev, "failure in hisi_dt_parse_common\n");
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goto dt_parse_ldo_end1;
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}
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return ret;
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dt_parse_ldo_end1:
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dt_parse_ldo_end:
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return ret;
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}
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static struct regulator_ops hisi_ldo_rops = {
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.is_enabled = hisi_regulator_is_enabled,
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.enable = hisi_regulator_enable,
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.disable = hisi_regulator_disable,
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.list_voltage = regulator_list_voltage_table,
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.get_voltage = hisi_regulator_get_voltage,
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.set_voltage = hisi_regulator_set_voltage,
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.get_mode = hisi_regulator_get_mode,
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.set_mode = hisi_regulator_set_mode,
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.get_optimum_mode = hisi_regulator_get_optimum_mode,
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};
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static const struct hisi_regulator hisi_regulator_ldo = {
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.rdesc = {
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.ops = &hisi_ldo_rops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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},
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.dt_parse = hisi_dt_parse_ldo,
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};
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static struct of_device_id of_hisi_regulator_match_tbl[] = {
|
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{
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.compatible = "hisilicon-hisi-ldo",
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.data = &hisi_regulator_ldo,
|
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},
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{ /* end */ }
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};
|
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|
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#ifdef CONFIG_HISI_PMIC_DEBUG
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extern void get_current_regulator_dev(struct seq_file *s);
|
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extern void set_regulator_state(char *ldo_name, int value);
|
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extern void get_regulator_state(char *ldo_name);
|
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extern int set_regulator_voltage(char *ldo_name, unsigned int vol_value);
|
||||
|
||||
u32 pmu_atoi(char *s)
|
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{
|
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char *p = s;
|
||||
char c;
|
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u64 ret = 0;
|
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if (s == NULL)
|
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return 0;
|
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while ((c = *p++) != '\0') {
|
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if ('0' <= c && c <= '9') {
|
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ret *= 10;
|
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ret += (u64)((unsigned char)c - '0');
|
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if (ret > U32_MAX)
|
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return 0;
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
return (u32)ret;
|
||||
}
|
||||
static int dbg_hisi_regulator_show(struct seq_file *s, void *data)
|
||||
{
|
||||
seq_printf(s, "\n\r");
|
||||
seq_printf(s, "%-13s %-15s %-15s %-15s %-15s\n\r",
|
||||
"LDO_NAME", "ON/OFF", "Use_count", "Open_count", "Always_on");
|
||||
seq_printf(s, "-----------------------------------------"
|
||||
"-----------------------------------------------\n\r");
|
||||
get_current_regulator_dev(s);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int dbg_hisi_regulator_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return single_open(file, dbg_hisi_regulator_show, inode->i_private);
|
||||
}
|
||||
|
||||
static const struct file_operations debug_regulator_state_fops = {
|
||||
.open = dbg_hisi_regulator_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = single_release,
|
||||
};
|
||||
|
||||
static int dbg_control_regulator_show(struct seq_file *s, void *data)
|
||||
{
|
||||
printk(" \n\r \
|
||||
---------------------------------------------------------------------------------\n\r \
|
||||
|usage: |\n\r \
|
||||
| S = state R = read V = voltage |\n\r \
|
||||
| set ldo state and voltage |\n\r \
|
||||
| get ldo state and current voltage |\n\r \
|
||||
|example: |\n\r \
|
||||
| echo S ldo16 0 > control_regulator :disable ldo16 |\n\r \
|
||||
| echo S ldo16 1 > control_regulator :enable ldo16 |\n\r \
|
||||
| echo R ldo16 > control_regulator :get ldo16 state and voltage |\n\r \
|
||||
| echo V ldo16 xxx > control_regulator :set ldo16 voltage |\n\r \
|
||||
---------------------------------------------------------------------------------\n\r");
|
||||
return 0;
|
||||
}
|
||||
static ssize_t dbg_control_regulator_set_value(struct file *filp, const char __user *buffer,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
char tmp[128] = {0};
|
||||
char ptr[128] = {0};
|
||||
char *vol = NULL;
|
||||
char num = 0;
|
||||
unsigned int i;
|
||||
int next_flag = 1;
|
||||
|
||||
if (count >= 128) {
|
||||
pr_info("error! buffer size big than internal buffer\n");
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
if (copy_from_user(tmp, buffer, count)) {
|
||||
pr_info("error!\n");
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
if (tmp[0] == 'R' || tmp[0] == 'r') {
|
||||
for (i = 2; i < (count - 1); i++) {
|
||||
ptr[i - 2] = tmp[i];
|
||||
}
|
||||
ptr[i - 2] = '\0';
|
||||
get_regulator_state(ptr);
|
||||
} else if (tmp[0] == 'S' || tmp[0] == 's') {
|
||||
for (i = 2; i < (count - 1); i++) {
|
||||
if (tmp[i] == ' ') {
|
||||
next_flag = 0;
|
||||
ptr[i - 2] = '\0';
|
||||
continue;
|
||||
}
|
||||
if (next_flag) {
|
||||
ptr[i - 2] = tmp[i];
|
||||
} else {
|
||||
num = tmp[i] - 48;
|
||||
}
|
||||
}
|
||||
set_regulator_state(ptr, num);
|
||||
} else if (tmp[0] == 'V' || tmp[0] == 'v') {
|
||||
for (i = 2; i < (count - 1); i++) {
|
||||
if (tmp[i] == ' ') {
|
||||
next_flag = 0;
|
||||
ptr[i - 2] = '\0';
|
||||
continue;
|
||||
}
|
||||
if (next_flag) {
|
||||
ptr[i - 2] = tmp[i];
|
||||
} else {
|
||||
vol = &tmp[i];
|
||||
break;
|
||||
}
|
||||
}
|
||||
set_regulator_voltage(ptr, pmu_atoi(vol));
|
||||
}
|
||||
|
||||
*ppos += count;
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static int dbg_control_regulator_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
file->private_data = inode->i_private;
|
||||
return single_open(file, dbg_control_regulator_show, &inode->i_private);
|
||||
}
|
||||
|
||||
static const struct file_operations set_control_regulator_fops = {
|
||||
.open = dbg_control_regulator_open,
|
||||
.read = seq_read,
|
||||
.write = dbg_control_regulator_set_value,
|
||||
.llseek = seq_lseek,
|
||||
.release = single_release,
|
||||
};
|
||||
#endif
|
||||
|
||||
static int hisi_regulator_probe(struct spmi_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct device_node *np = dev->of_node;
|
||||
struct regulator_desc *rdesc;
|
||||
struct regulator_dev *rdev;
|
||||
struct hisi_regulator *sreg = NULL;
|
||||
struct regulator_init_data *initdata;
|
||||
struct regulator_config config = { };
|
||||
const struct of_device_id *match;
|
||||
struct regulation_constraints *constraint;
|
||||
const char *supplyname = NULL;
|
||||
#ifdef CONFIG_HISI_PMIC_DEBUG
|
||||
struct dentry *d;
|
||||
static int debugfs_flag;
|
||||
#endif
|
||||
unsigned int temp_modes;
|
||||
|
||||
const struct hisi_regulator *template = NULL;
|
||||
int ret = 0;
|
||||
/* to check which type of regulator this is */
|
||||
match = of_match_device(of_hisi_regulator_match_tbl, &pdev->dev);
|
||||
if (NULL == match) {
|
||||
pr_err("get hisi regulator fail!\n\r");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
template = match->data;
|
||||
#if (LINUX_VERSION_CODE > KERNEL_VERSION(3, 13, 0))
|
||||
initdata = of_get_regulator_init_data(dev, np, NULL);
|
||||
#else
|
||||
initdata = of_get_regulator_init_data(dev, np);
|
||||
#endif
|
||||
if (NULL == initdata) {
|
||||
pr_err("get regulator init data error !\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* hisi regulator supports two modes */
|
||||
constraint = &initdata->constraints;
|
||||
|
||||
ret = of_property_read_u32_array(np, "hisilicon,valid-modes-mask",
|
||||
&(constraint->valid_modes_mask), 1);
|
||||
if (ret) {
|
||||
pr_err("no hisilicon,valid-modes-mask property set\n");
|
||||
ret = -ENODEV;
|
||||
return ret;
|
||||
}
|
||||
ret = of_property_read_u32_array(np, "hisilicon,valid-idle-mask",
|
||||
&temp_modes, 1);
|
||||
if (ret) {
|
||||
pr_err("no hisilicon,valid-modes-mask property set\n");
|
||||
ret = -ENODEV;
|
||||
return ret;
|
||||
}
|
||||
constraint->valid_ops_mask |= temp_modes;
|
||||
|
||||
sreg = kmemdup(template, sizeof(*sreg), GFP_KERNEL);
|
||||
if (!sreg) {
|
||||
pr_err("template kememdup is fail. \n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
sreg->name = initdata->constraints.name;
|
||||
rdesc = &sreg->rdesc;
|
||||
rdesc->name = sreg->name;
|
||||
rdesc->min_uV = initdata->constraints.min_uV;
|
||||
supplyname = of_get_property(np, "hisilicon,supply_name", NULL);
|
||||
if (supplyname != NULL) {
|
||||
initdata->supply_regulator = supplyname;
|
||||
}
|
||||
|
||||
/* to parse device tree data for regulator specific */
|
||||
ret = sreg->dt_parse(sreg, pdev);
|
||||
if (ret) {
|
||||
dev_err(dev, "device tree parameter parse error!\n");
|
||||
goto hisi_probe_end;
|
||||
}
|
||||
|
||||
config.dev = &pdev->dev;
|
||||
config.init_data = initdata;
|
||||
config.driver_data = sreg;
|
||||
config.of_node = pdev->dev.of_node;
|
||||
|
||||
/* register regulator */
|
||||
rdev = regulator_register(rdesc, &config);
|
||||
if (IS_ERR(rdev)) {
|
||||
dev_err(dev, "failed to register %s\n",
|
||||
rdesc->name);
|
||||
ret = PTR_ERR(rdev);
|
||||
goto hisi_probe_end;
|
||||
}
|
||||
|
||||
BRAND_DEBUG("[%s]:valid_modes_mask[0x%x], valid_ops_mask[0x%x]\n", rdesc->name,\
|
||||
constraint->valid_modes_mask, constraint->valid_ops_mask);
|
||||
|
||||
dev_set_drvdata(dev, rdev);
|
||||
#ifdef CONFIG_HISI_PMIC_DEBUG
|
||||
if (debugfs_flag == 0) {
|
||||
d = debugfs_create_dir("hisi_regulator_debugfs", NULL);
|
||||
if (!d) {
|
||||
dev_err(dev, "failed to create hisi regulator debugfs dir !\n");
|
||||
ret = -ENOMEM;
|
||||
goto hisi_probe_fail;
|
||||
}
|
||||
(void) debugfs_create_file("regulator_state", S_IRUSR,
|
||||
d, NULL, &debug_regulator_state_fops);
|
||||
|
||||
(void) debugfs_create_file("control_regulator", S_IRUSR,
|
||||
d, NULL, &set_control_regulator_fops);
|
||||
debugfs_flag = 1;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_HISI_PMIC_DEBUG
|
||||
hisi_probe_fail:
|
||||
if (ret)
|
||||
regulator_unregister(rdev);
|
||||
#endif
|
||||
hisi_probe_end:
|
||||
if (ret)
|
||||
kfree(sreg);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void hisi_regulator_remove(struct spmi_device *pdev)
|
||||
{
|
||||
struct regulator_dev *rdev = dev_get_drvdata(&pdev->dev);
|
||||
struct hisi_regulator *sreg = rdev_get_drvdata(rdev);
|
||||
|
||||
regulator_unregister(rdev);
|
||||
|
||||
/* TODO: should i worry about that? devm_kzalloc */
|
||||
if (sreg->rdesc.volt_table)
|
||||
devm_kfree(&pdev->dev, (unsigned int *)sreg->rdesc.volt_table);
|
||||
|
||||
kfree(sreg);
|
||||
}
|
||||
static int hisi_regulator_suspend(struct device *dev, pm_message_t state)
|
||||
{
|
||||
struct hisi_regulator *hisi_regulator = dev_get_drvdata(dev);
|
||||
|
||||
if (NULL == hisi_regulator) {
|
||||
pr_err("%s:regulator is NULL\n", __func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
pr_info("%s:+\n", __func__);
|
||||
pr_info("%s:-\n", __func__);
|
||||
|
||||
return 0;
|
||||
}/*lint !e715 */
|
||||
|
||||
static int hisi_regulator_resume(struct device *dev)
|
||||
{
|
||||
struct hisi_regulator *hisi_regulator = dev_get_drvdata(dev);
|
||||
|
||||
if (NULL == hisi_regulator) {
|
||||
pr_err("%s:regulator is NULL\n", __func__);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
pr_info("%s:+\n", __func__);
|
||||
pr_info("%s:-\n", __func__);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct spmi_driver hisi_pmic_driver = {
|
||||
.driver = {
|
||||
.name = "hisi_regulator",
|
||||
.owner = THIS_MODULE,
|
||||
.of_match_table = of_hisi_regulator_match_tbl,
|
||||
.suspend = hisi_regulator_suspend,
|
||||
.resume = hisi_regulator_resume,
|
||||
},
|
||||
.probe = hisi_regulator_probe,
|
||||
.remove = hisi_regulator_remove,
|
||||
};
|
||||
|
||||
static int __init hisi_regulator_init(void)
|
||||
{
|
||||
return spmi_driver_register(&hisi_pmic_driver);
|
||||
}
|
||||
|
||||
static void __exit hisi_regulator_exit(void)
|
||||
{
|
||||
spmi_driver_unregister(&hisi_pmic_driver);
|
||||
}
|
||||
|
||||
fs_initcall(hisi_regulator_init);
|
||||
module_exit(hisi_regulator_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Hisi regulator driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user