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https://github.com/followmsi/android_kernel_google_msm.git
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mfd: pm8058: Modify pm8058 subdevices to pm8xxx interface
Move the following subdevices to use the pm8xxx interface - mpp, irq, gpio, keypad, power-key, leds, othc, vibrator, rtc, batt-alarm, thermal, upl, nfc, pwm, xoadc, regulators, xo-buffers, charger. This allows usage of a common driver for modules which are same across multiple PM8XXX PMICs. It also provides flexibility to add/remove subdevices for multiple board configurations. Change-Id: Id9795552fc9f4a2c920c070babfaef1f4cd6ca61 Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>
This commit is contained in:
Anirudh Ghayal
Stephen Boyd
parent
a3c0edd841
commit
1b0b1f6685
4 changed files with 398 additions and 0 deletions
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@ -584,6 +584,13 @@ config PMIC8XXX_VIBRATOR
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on the PM8XXX chips. The vibrator is controlled using the
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timed output class.
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config PMIC8XXX_NFC
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tristate "Qualcomm PM8XXX support for Near Field Communication"
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depends on MFD_PM8XXX
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help
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Qualcomm PM8XXX chips have a module to support NFC (Near Field
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Communication). This option enables the driver to support it.
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source "drivers/misc/c2port/Kconfig"
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source "drivers/misc/eeprom/Kconfig"
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source "drivers/misc/cb710/Kconfig"
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@ -59,3 +59,4 @@ obj-$(CONFIG_TSPP) += tspp.o
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obj-$(CONFIG_HAPTIC_ISA1200) += isa1200.o
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obj-$(CONFIG_PMIC8058_PWM) += pmic8058-pwm.o
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obj-$(CONFIG_PMIC8XXX_VIBRATOR) += pm8xxx-vibrator.o
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obj-$(CONFIG_PMIC8XXX_NFC) += pm8xxx-nfc.o
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311
drivers/misc/pm8xxx-nfc.c
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311
drivers/misc/pm8xxx-nfc.c
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@ -0,0 +1,311 @@
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/* Copyright (c) 2010,2011 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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/*
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* Qualcomm PMIC8XXX NFC driver
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <linux/mfd/pm8xxx/core.h>
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#include <linux/mfd/pm8xxx/nfc.h>
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/* PM8XXX NFC */
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#define SSBI_REG_NFC_CTRL 0x14D
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#define SSBI_REG_NFC_TEST 0x14E
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/* NFC_CTRL */
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#define PM8XXX_NFC_SUPPORT_EN 0x80
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#define PM8XXX_NFC_LDO_EN 0x40
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#define PM8XXX_NFC_EN 0x20
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#define PM8XXX_NFC_EXT_VDDLDO_EN 0x10
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#define PM8XXX_NFC_VPH_PWR_EN 0x08
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#define PM8XXX_NFC_RESERVED 0x04
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#define PM8XXX_NFC_VDDLDO_LEVEL 0x03
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/* NFC_TEST */
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#define PM8XXX_NFC_VDDLDO_MON_EN 0x80
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#define PM8XXX_NFC_ATEST_EN 0x40
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#define PM8XXX_NFC_DTEST1_EN 0x20
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#define PM8XXX_NFC_RESERVED2 0x18
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#define PM8XXX_NFC_VDDLDO_OK_S 0x04
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#define PM8XXX_NFC_MBG_EN_S 0x02
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#define PM8XXX_NFC_EXT_EN_S 0x01
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struct pm8xxx_nfc_device {
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struct device *dev;
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struct mutex nfc_mutex;
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#if defined(CONFIG_DEBUG_FS)
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struct dentry *dent;
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#endif
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};
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static struct pm8xxx_nfc_device *nfc_dev;
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/* APIs */
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/*
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* pm8xxx_nfc_request - request a handle to access NFC device
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*/
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struct pm8xxx_nfc_device *pm8xxx_nfc_request(void)
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{
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return nfc_dev;
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}
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EXPORT_SYMBOL(pm8xxx_nfc_request);
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/*
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* pm8xxx_nfc_config - configure NFC signals
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*
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* @nfcdev: the NFC device
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* @mask: signal mask to configure
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* @flags: control flags
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*/
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int pm8xxx_nfc_config(struct pm8xxx_nfc_device *nfcdev, u32 mask, u32 flags)
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{
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u8 nfc_ctrl, nfc_test, m, f;
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int rc;
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if (nfcdev == NULL || IS_ERR(nfcdev) || !mask)
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return -EINVAL;
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mutex_lock(&nfcdev->nfc_mutex);
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if (!(mask & PM_NFC_CTRL_REQ))
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goto config_test;
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rc = pm8xxx_readb(nfcdev->dev->parent, SSBI_REG_NFC_CTRL, &nfc_ctrl);
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if (rc) {
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pr_err("%s: FAIL pm8xxx_readb(): rc=%d (nfc_ctrl=0x%x)\n",
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__func__, rc, nfc_ctrl);
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goto config_done;
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}
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m = mask & 0x00ff;
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f = flags & 0x00ff;
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nfc_ctrl &= ~m;
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nfc_ctrl |= m & f;
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rc = pm8xxx_writeb(nfcdev->dev->parent, SSBI_REG_NFC_CTRL, nfc_ctrl);
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if (rc) {
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pr_err("%s: FAIL pm8xxx_writeb(): rc=%d (nfc_ctrl=0x%x)\n",
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__func__, rc, nfc_ctrl);
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goto config_done;
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}
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config_test:
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if (!(mask & PM_NFC_TEST_REQ))
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goto config_done;
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rc = pm8xxx_readb(nfcdev->dev->parent, SSBI_REG_NFC_TEST, &nfc_test);
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if (rc) {
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pr_err("%s: FAIL pm8xxx_readb(): rc=%d (nfc_test=0x%x)\n",
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__func__, rc, nfc_test);
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goto config_done;
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}
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m = (mask >> 8) & 0x00ff;
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f = (flags >> 8) & 0x00ff;
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nfc_test &= ~m;
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nfc_test |= m & f;
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rc = pm8xxx_writeb(nfcdev->dev->parent, SSBI_REG_NFC_TEST, nfc_test);
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if (rc) {
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pr_err("%s: FAIL pm8xxx_writeb(): rc=%d (nfc_test=0x%x)\n",
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__func__, rc, nfc_test);
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goto config_done;
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}
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config_done:
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mutex_unlock(&nfcdev->nfc_mutex);
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return 0;
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}
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EXPORT_SYMBOL(pm8xxx_nfc_config);
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/*
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* pm8xxx_nfc_get_status - get NFC status
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*
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* @nfcdev: the NFC device
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* @mask: of status mask to read
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* @status: pointer to the status variable
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*/
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int pm8xxx_nfc_get_status(struct pm8xxx_nfc_device *nfcdev,
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u32 mask, u32 *status)
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{
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u8 nfc_ctrl, nfc_test;
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u32 st;
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int rc;
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if (nfcdev == NULL || IS_ERR(nfcdev) || status == NULL)
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return -EINVAL;
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st = 0;
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mutex_lock(&nfcdev->nfc_mutex);
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if (!(mask & PM_NFC_CTRL_REQ))
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goto read_test;
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rc = pm8xxx_readb(nfcdev->dev->parent, SSBI_REG_NFC_CTRL, &nfc_ctrl);
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if (rc) {
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pr_err("%s: FAIL pm8xxx_readb(): rc=%d (nfc_ctrl=0x%x)\n",
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__func__, rc, nfc_ctrl);
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goto get_status_done;
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}
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read_test:
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if (!(mask & (PM_NFC_TEST_REQ | PM_NFC_TEST_STATUS)))
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goto get_status_done;
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rc = pm8xxx_readb(nfcdev->dev->parent, SSBI_REG_NFC_TEST, &nfc_test);
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if (rc)
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pr_err("%s: FAIL pm8xxx_readb(): rc=%d (nfc_test=0x%x)\n",
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__func__, rc, nfc_test);
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get_status_done:
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st = nfc_ctrl;
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st |= nfc_test << 8;
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*status = st;
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mutex_unlock(&nfcdev->nfc_mutex);
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return 0;
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}
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EXPORT_SYMBOL(pm8xxx_nfc_get_status);
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/*
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* pm8xxx_nfc_free - free the NFC device
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*/
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void pm8xxx_nfc_free(struct pm8xxx_nfc_device *nfcdev)
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{
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/* Disable all signals */
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pm8xxx_nfc_config(nfcdev, PM_NFC_CTRL_REQ, 0);
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}
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EXPORT_SYMBOL(pm8xxx_nfc_free);
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#if defined(CONFIG_DEBUG_FS)
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static int pm8xxx_nfc_debug_set(void *data, u64 val)
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{
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struct pm8xxx_nfc_device *nfcdev;
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u32 mask, control;
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int rc;
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nfcdev = (struct pm8xxx_nfc_device *)data;
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control = (u32)val & 0xffff;
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mask = ((u32)val >> 16) & 0xffff;
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rc = pm8xxx_nfc_config(nfcdev, mask, control);
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if (rc)
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pr_err("%s: ERR pm8xxx_nfc_config: rc=%d, "
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"[mask, control]=[0x%x, 0x%x]\n",
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__func__, rc, mask, control);
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return 0;
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}
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static int pm8xxx_nfc_debug_get(void *data, u64 *val)
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{
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struct pm8xxx_nfc_device *nfcdev;
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u32 status;
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int rc;
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nfcdev = (struct pm8xxx_nfc_device *)data;
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rc = pm8xxx_nfc_get_status(nfcdev, (u32)-1, &status);
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if (rc)
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pr_err("%s: ERR pm8xxx_nfc_get_status: rc=%d, status=0x%x\n",
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__func__, rc, status);
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if (val)
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*val = (u64)status;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(pm8xxx_nfc_fops, pm8xxx_nfc_debug_get,
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pm8xxx_nfc_debug_set, "%llu\n");
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static int pm8xxx_nfc_debug_init(struct pm8xxx_nfc_device *nfcdev)
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{
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struct dentry *dent;
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dent = debugfs_create_file("pm8xxx-nfc", 0644, NULL,
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(void *)nfcdev, &pm8xxx_nfc_fops);
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if (dent == NULL || IS_ERR(dent))
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pr_err("%s: ERR debugfs_create_file: dent=0x%x\n",
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__func__, (unsigned)dent);
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nfcdev->dent = dent;
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return 0;
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}
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#endif
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static int __devinit pm8xxx_nfc_probe(struct platform_device *pdev)
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{
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struct pm8xxx_nfc_device *nfcdev;
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nfcdev = kzalloc(sizeof *nfcdev, GFP_KERNEL);
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if (nfcdev == NULL) {
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pr_err("%s: kzalloc() failed.\n", __func__);
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return -ENOMEM;
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}
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mutex_init(&nfcdev->nfc_mutex);
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nfcdev->dev = &pdev->dev;
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nfc_dev = nfcdev;
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platform_set_drvdata(pdev, nfcdev);
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#if defined(CONFIG_DEBUG_FS)
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pm8xxx_nfc_debug_init(nfc_dev);
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#endif
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pr_notice("%s: OK\n", __func__);
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return 0;
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}
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static int __devexit pm8xxx_nfc_remove(struct platform_device *pdev)
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{
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struct pm8xxx_nfc_device *nfcdev = platform_get_drvdata(pdev);
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#if defined(CONFIG_DEBUG_FS)
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debugfs_remove(nfcdev->dent);
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#endif
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platform_set_drvdata(pdev, NULL);
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kfree(nfcdev);
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return 0;
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}
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static struct platform_driver pm8xxx_nfc_driver = {
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.probe = pm8xxx_nfc_probe,
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.remove = __devexit_p(pm8xxx_nfc_remove),
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.driver = {
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.name = PM8XXX_NFC_DEV_NAME,
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.owner = THIS_MODULE,
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},
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};
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static int __init pm8xxx_nfc_init(void)
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{
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return platform_driver_register(&pm8xxx_nfc_driver);
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}
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static void __exit pm8xxx_nfc_exit(void)
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{
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platform_driver_unregister(&pm8xxx_nfc_driver);
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}
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module_init(pm8xxx_nfc_init);
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module_exit(pm8xxx_nfc_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("PM8XXX NFC driver");
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MODULE_VERSION("1.0");
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MODULE_ALIAS("platform:" PM8XXX_NFC_DEV_NAME);
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79
include/linux/mfd/pm8xxx/nfc.h
Normal file
79
include/linux/mfd/pm8xxx/nfc.h
Normal file
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@ -0,0 +1,79 @@
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/* Copyright (c) 2010,2011 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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#ifndef __PM8XXX_NFC_H__
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#define __PM8XXX_NFC_H__
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struct pm8xxx_nfc_device;
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#define PM8XXX_NFC_DEV_NAME "pm8xxx-nfc"
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/* masks, flags and status */
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#define PM_NFC_VDDLDO_MON_LEVEL 0x0003
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#define PM_NFC_VPH_PWR_EN 0x0008
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#define PM_NFC_EXT_VDDLDO_EN 0x0010
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#define PM_NFC_EN 0x0020
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#define PM_NFC_LDO_EN 0x0040
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#define PM_NFC_SUPPORT_EN 0x0080
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#define PM_NFC_EXT_EN_HIGH 0x0100
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#define PM_NFC_MBG_EN_HIGH 0x0200
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#define PM_NFC_VDDLDO_OK_HIGH 0x0400
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#define PM_NFC_DTEST1_MODE 0x2000
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#define PM_NFC_ATEST_EN 0x4000
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#define PM_NFC_VDDLDO_MON_EN 0x8000
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#define PM_NFC_CTRL_REQ (PM_NFC_SUPPORT_EN |\
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PM_NFC_LDO_EN |\
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PM_NFC_EN |\
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PM_NFC_EXT_VDDLDO_EN |\
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PM_NFC_VPH_PWR_EN |\
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PM_NFC_VDDLDO_MON_LEVEL)
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#define PM_NFC_TEST_REQ (PM_NFC_VDDLDO_MON_EN |\
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PM_NFC_DTEST1_MODE |\
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PM_NFC_ATEST_EN)
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#define PM_NFC_TEST_STATUS (PM_NFC_EXT_EN_HIGH |\
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PM_NFC_MBG_EN_HIGH |\
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PM_NFC_VDDLDO_OK_HIGH)
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/*
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* pm8xxx_nfc_request - request a handle to access NFC device
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*/
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struct pm8xxx_nfc_device *pm8xxx_nfc_request(void);
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/*
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* pm8xxx_nfc_config - configure NFC signals
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*
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* @nfcdev: the NFC device
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* @mask: signal mask to configure
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* @flags: control flags
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*/
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int pm8xxx_nfc_config(struct pm8xxx_nfc_device *nfcdev, u32 mask, u32 flags);
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/*
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* pm8xxx_nfc_get_status - get NFC status
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*
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* @nfcdev: the NFC device
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* @mask: of status mask to read
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* @status: pointer to the status variable
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*/
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int pm8xxx_nfc_get_status(struct pm8xxx_nfc_device *nfcdev,
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u32 mask, u32 *status);
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/*
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* pm8xxx_nfc_free - free the NFC device
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*/
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void pm8xxx_nfc_free(struct pm8xxx_nfc_device *nfcdev);
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#endif /* __PM8XXX_NFC_H__ */
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