mfd: Add Qualcomm PMIC 8921 core driver
Add support for the Qualcomm PM8921 PMIC chip. The core driver will communicate with the PMIC chip via the MSM SSBI bus. Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Abhijeet Dharmapurikar
Samuel Ortiz
parent
1305134e82
commit
cbdb53e1f3
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@ -691,6 +691,24 @@ config MFD_OMAP_USB_HOST
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This MFD driver does the required setup functionalities for
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OMAP USB Host drivers.
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config MFD_PM8XXX
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tristate
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config MFD_PM8921_CORE
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tristate "Qualcomm PM8921 PMIC chip"
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depends on MSM_SSBI
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select MFD_CORE
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select MFD_PM8XXX
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help
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If you say yes to this option, support will be included for the
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built-in PM8921 PMIC chip.
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This is required if your board has a PM8921 and uses its features,
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such as: MPPs, GPIOs, regulators, interrupts, and PWM.
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Say M here if you want to include support for PM8921 chip as a module.
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This will build a module called "pm8921-core".
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endif # MFD_SUPPORT
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menu "Multimedia Capabilities Port drivers"
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@ -91,3 +91,4 @@ obj-$(CONFIG_MFD_VX855) += vx855.o
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obj-$(CONFIG_MFD_WL1273_CORE) += wl1273-core.o
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obj-$(CONFIG_MFD_CS5535) += cs5535-mfd.o
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obj-$(CONFIG_MFD_OMAP_USB_HOST) += omap-usb-host.o
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obj-$(CONFIG_MFD_PM8921_CORE) += pm8921-core.o
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158
drivers/mfd/pm8921-core.c
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158
drivers/mfd/pm8921-core.c
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@ -0,0 +1,158 @@
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/*
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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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 and
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* only version 2 as 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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#define pr_fmt(fmt) "%s: " fmt, __func__
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/msm_ssbi.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/pm8xxx/pm8921.h>
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#include <linux/mfd/pm8xxx/core.h>
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#define REG_HWREV 0x002 /* PMIC4 revision */
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#define REG_HWREV_2 0x0E8 /* PMIC4 revision 2 */
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struct pm8921 {
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struct device *dev;
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};
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static int pm8921_readb(const struct device *dev, u16 addr, u8 *val)
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{
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const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev);
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const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data;
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return msm_ssbi_read(pmic->dev->parent, addr, val, 1);
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}
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static int pm8921_writeb(const struct device *dev, u16 addr, u8 val)
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{
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const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev);
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const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data;
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return msm_ssbi_write(pmic->dev->parent, addr, &val, 1);
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}
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static int pm8921_read_buf(const struct device *dev, u16 addr, u8 *buf,
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int cnt)
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{
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const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev);
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const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data;
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return msm_ssbi_read(pmic->dev->parent, addr, buf, cnt);
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}
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static int pm8921_write_buf(const struct device *dev, u16 addr, u8 *buf,
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int cnt)
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{
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const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev);
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const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data;
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return msm_ssbi_write(pmic->dev->parent, addr, buf, cnt);
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}
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static struct pm8xxx_drvdata pm8921_drvdata = {
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.pmic_readb = pm8921_readb,
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.pmic_writeb = pm8921_writeb,
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.pmic_read_buf = pm8921_read_buf,
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.pmic_write_buf = pm8921_write_buf,
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};
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static int __devinit pm8921_probe(struct platform_device *pdev)
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{
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const struct pm8921_platform_data *pdata = pdev->dev.platform_data;
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struct pm8921 *pmic;
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int rc;
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u8 val;
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if (!pdata) {
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pr_err("missing platform data\n");
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return -EINVAL;
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}
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pmic = kzalloc(sizeof(struct pm8921), GFP_KERNEL);
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if (!pmic) {
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pr_err("Cannot alloc pm8921 struct\n");
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return -ENOMEM;
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}
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/* Read PMIC chip revision */
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rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV, &val, sizeof(val));
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if (rc) {
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pr_err("Failed to read hw rev reg %d:rc=%d\n", REG_HWREV, rc);
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goto err_read_rev;
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}
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pr_info("PMIC revision 1: %02X\n", val);
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/* Read PMIC chip revision 2 */
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rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV_2, &val, sizeof(val));
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if (rc) {
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pr_err("Failed to read hw rev 2 reg %d:rc=%d\n",
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REG_HWREV_2, rc);
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goto err_read_rev;
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}
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pr_info("PMIC revision 2: %02X\n", val);
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pmic->dev = &pdev->dev;
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pm8921_drvdata.pm_chip_data = pmic;
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platform_set_drvdata(pdev, &pm8921_drvdata);
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return 0;
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err_read_rev:
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kfree(pmic);
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return rc;
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}
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static int __devexit pm8921_remove(struct platform_device *pdev)
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{
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struct pm8xxx_drvdata *drvdata;
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struct pm8921 *pmic = NULL;
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drvdata = platform_get_drvdata(pdev);
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if (drvdata)
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pmic = drvdata->pm_chip_data;
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if (pmic)
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mfd_remove_devices(pmic->dev);
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platform_set_drvdata(pdev, NULL);
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kfree(pmic);
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return 0;
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}
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static struct platform_driver pm8921_driver = {
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.probe = pm8921_probe,
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.remove = __devexit_p(pm8921_remove),
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.driver = {
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.name = "pm8921-core",
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.owner = THIS_MODULE,
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},
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};
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static int __init pm8921_init(void)
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{
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return platform_driver_register(&pm8921_driver);
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}
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subsys_initcall(pm8921_init);
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static void __exit pm8921_exit(void)
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{
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platform_driver_unregister(&pm8921_driver);
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}
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module_exit(pm8921_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("PMIC 8921 core driver");
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MODULE_VERSION("1.0");
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MODULE_ALIAS("platform:pm8921-core");
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71
include/linux/mfd/pm8xxx/core.h
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71
include/linux/mfd/pm8xxx/core.h
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@ -0,0 +1,71 @@
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/*
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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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 and
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* only version 2 as 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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* Qualcomm PMIC 8xxx driver header file
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*
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*/
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#ifndef __MFD_PM8XXX_CORE_H
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#define __MFD_PM8XXX_CORE_H
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#include <linux/mfd/core.h>
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struct pm8xxx_drvdata {
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int (*pmic_readb) (const struct device *dev, u16 addr, u8 *val);
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int (*pmic_writeb) (const struct device *dev, u16 addr, u8 val);
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int (*pmic_read_buf) (const struct device *dev, u16 addr, u8 *buf,
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int n);
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int (*pmic_write_buf) (const struct device *dev, u16 addr, u8 *buf,
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int n);
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void *pm_chip_data;
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};
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static inline int pm8xxx_readb(const struct device *dev, u16 addr, u8 *val)
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{
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struct pm8xxx_drvdata *dd = dev_get_drvdata(dev);
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if (!dd)
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return -EINVAL;
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return dd->pmic_readb(dev, addr, val);
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}
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static inline int pm8xxx_writeb(const struct device *dev, u16 addr, u8 val)
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{
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struct pm8xxx_drvdata *dd = dev_get_drvdata(dev);
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if (!dd)
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return -EINVAL;
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return dd->pmic_writeb(dev, addr, val);
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}
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static inline int pm8xxx_read_buf(const struct device *dev, u16 addr, u8 *buf,
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int n)
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{
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struct pm8xxx_drvdata *dd = dev_get_drvdata(dev);
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if (!dd)
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return -EINVAL;
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return dd->pmic_read_buf(dev, addr, buf, n);
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}
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static inline int pm8xxx_write_buf(const struct device *dev, u16 addr, u8 *buf,
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int n)
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{
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struct pm8xxx_drvdata *dd = dev_get_drvdata(dev);
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if (!dd)
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return -EINVAL;
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return dd->pmic_write_buf(dev, addr, buf, n);
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}
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#endif
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27
include/linux/mfd/pm8xxx/pm8921.h
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27
include/linux/mfd/pm8xxx/pm8921.h
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@ -0,0 +1,27 @@
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/*
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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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 and
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* only version 2 as 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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* Qualcomm PMIC 8921 driver header file
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*
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*/
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#ifndef __MFD_PM8921_H
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#define __MFD_PM8921_H
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#include <linux/device.h>
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struct pm8921_platform_data {
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int irq_base;
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};
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#endif
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