mfd: add AB4500 driver
This adds core driver support for AB4500 mixed signal multimedia & power management chip. This connects to U8500 on the SSP (pl022) and exports read/write functions for the device to get access to this chip. This also registers the client devices and sets the parent. Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Andrea Gallo <andrea.gallo@stericsson.com> Reviewed-by: Mark Brown <broonie@sirena.org.uk> Reviewed-by: Jean-Christophe <plagnioj@jcrosoft.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>hifive-unleashed-5.1
Srinidhi Kasagar
Samuel Ortiz
parent
4107da2a28
commit
0c41839e98
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@ -329,6 +329,16 @@ config MFD_88PM8607
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individual components like voltage regulators, RTC and
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battery-charger under the corresponding menus.
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config AB4500_CORE
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tristate "ST-Ericsson's AB4500 Mixed Signal Power management chip"
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depends on SPI
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default y
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help
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Select this option to enable access to AB4500 power management
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chip. This connects to U8500 on the SSP/SPI bus and exports
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read/write functions for the devices to get access to this chip.
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This chip embeds various other multimedia funtionalities as well.
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endmenu
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menu "Multimedia Capabilities Port drivers"
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@ -52,4 +52,5 @@ obj-$(CONFIG_PCF50633_ADC) += pcf50633-adc.o
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obj-$(CONFIG_PCF50633_GPIO) += pcf50633-gpio.o
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obj-$(CONFIG_AB3100_CORE) += ab3100-core.o
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obj-$(CONFIG_AB3100_OTP) += ab3100-otp.o
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obj-$(CONFIG_AB4500_CORE) += ab4500-core.o
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obj-$(CONFIG_MFD_88PM8607) += 88pm8607.o
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@ -0,0 +1,207 @@
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/*
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* Copyright (C) 2009 ST-Ericsson
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*
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* Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation.
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*
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* AB4500 is a companion power management chip used with U8500.
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* On this platform, this is interfaced with SSP0 controller
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* which is a ARM primecell pl022.
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*
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* At the moment the module just exports read/write features.
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* Interrupt management to be added - TODO.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#include <linux/mfd/ab4500.h>
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/* just required if probe fails, we need to
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* unregister the device
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*/
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static struct spi_driver ab4500_driver;
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/*
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* This funtion writes to any AB4500 registers using
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* SPI protocol & before it writes it packs the data
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* in the below 24 bit frame format
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*
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* *|------------------------------------|
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* *| 23|22...18|17.......10|9|8|7......0|
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* *| r/w bank adr data |
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* * ------------------------------------
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*
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* This function shouldn't be called from interrupt
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* context
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*/
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int ab4500_write(struct ab4500 *ab4500, unsigned char block,
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unsigned long addr, unsigned char data)
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{
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struct spi_transfer xfer;
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struct spi_message msg;
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int err;
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unsigned long spi_data =
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block << 18 | addr << 10 | data;
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mutex_lock(&ab4500->lock);
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ab4500->tx_buf[0] = spi_data;
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ab4500->rx_buf[0] = 0;
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xfer.tx_buf = ab4500->tx_buf;
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xfer.rx_buf = NULL;
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xfer.len = sizeof(unsigned long);
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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err = spi_sync(ab4500->spi, &msg);
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mutex_unlock(&ab4500->lock);
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return err;
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}
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EXPORT_SYMBOL(ab4500_write);
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int ab4500_read(struct ab4500 *ab4500, unsigned char block,
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unsigned long addr)
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{
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struct spi_transfer xfer;
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struct spi_message msg;
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unsigned long spi_data =
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1 << 23 | block << 18 | addr << 10;
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mutex_lock(&ab4500->lock);
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ab4500->tx_buf[0] = spi_data;
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ab4500->rx_buf[0] = 0;
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xfer.tx_buf = ab4500->tx_buf;
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xfer.rx_buf = ab4500->rx_buf;
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xfer.len = sizeof(unsigned long);
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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spi_sync(ab4500->spi, &msg);
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mutex_unlock(&ab4500->lock);
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return ab4500->rx_buf[0];
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}
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EXPORT_SYMBOL(ab4500_read);
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/* ref: ab3100 core */
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#define AB4500_DEVICE(devname, devid) \
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static struct platform_device ab4500_##devname##_device = { \
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.name = devid, \
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.id = -1, \
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}
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/* list of childern devices of ab4500 - all are
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* not populated here - TODO
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*/
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AB4500_DEVICE(charger, "ab4500-charger");
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AB4500_DEVICE(audio, "ab4500-audio");
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AB4500_DEVICE(usb, "ab4500-usb");
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AB4500_DEVICE(tvout, "ab4500-tvout");
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AB4500_DEVICE(sim, "ab4500-sim");
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AB4500_DEVICE(gpadc, "ab4500-gpadc");
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AB4500_DEVICE(clkmgt, "ab4500-clkmgt");
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AB4500_DEVICE(misc, "ab4500-misc");
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static struct platform_device *ab4500_platform_devs[] = {
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&ab4500_charger_device,
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&ab4500_audio_device,
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&ab4500_usb_device,
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&ab4500_tvout_device,
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&ab4500_sim_device,
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&ab4500_gpadc_device,
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&ab4500_clkmgt_device,
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&ab4500_misc_device,
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};
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static int __init ab4500_probe(struct spi_device *spi)
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{
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struct ab4500 *ab4500;
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unsigned char revision;
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int err = 0;
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int i;
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ab4500 = kzalloc(sizeof *ab4500, GFP_KERNEL);
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if (!ab4500) {
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dev_err(&spi->dev, "could not allocate AB4500\n");
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err = -ENOMEM;
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goto not_detect;
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}
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ab4500->spi = spi;
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spi_set_drvdata(spi, ab4500);
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mutex_init(&ab4500->lock);
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/* read the revision register */
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revision = ab4500_read(ab4500, AB4500_MISC, AB4500_REV_REG);
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/* revision id 0x0 is for early drop, 0x10 is for cut1.0 */
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if (revision == 0x0 || revision == 0x10)
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dev_info(&spi->dev, "Detected chip: %s, revision = %x\n",
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ab4500_driver.driver.name, revision);
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else {
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dev_err(&spi->dev, "unknown chip: 0x%x\n", revision);
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goto not_detect;
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}
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for (i = 0; i < ARRAY_SIZE(ab4500_platform_devs); i++) {
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ab4500_platform_devs[i]->dev.parent =
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&spi->dev;
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platform_set_drvdata(ab4500_platform_devs[i], ab4500);
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}
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/* register the ab4500 platform devices */
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platform_add_devices(ab4500_platform_devs,
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ARRAY_SIZE(ab4500_platform_devs));
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return err;
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not_detect:
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spi_unregister_driver(&ab4500_driver);
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kfree(ab4500);
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return err;
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}
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static int __devexit ab4500_remove(struct spi_device *spi)
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{
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struct ab4500 *ab4500 =
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spi_get_drvdata(spi);
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kfree(ab4500);
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return 0;
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}
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static struct spi_driver ab4500_driver = {
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.driver = {
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.name = "ab4500",
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.owner = THIS_MODULE,
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},
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.probe = ab4500_probe,
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.remove = __devexit_p(ab4500_remove)
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};
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static int __devinit ab4500_init(void)
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{
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return spi_register_driver(&ab4500_driver);
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}
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static void __exit ab4500_exit(void)
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{
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spi_unregister_driver(&ab4500_driver);
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}
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subsys_initcall_sync(ab4500_init);
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MODULE_AUTHOR("Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com");
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MODULE_DESCRIPTION("AB4500 core driver");
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MODULE_LICENSE("GPL");
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@ -0,0 +1,262 @@
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/*
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* Copyright (C) 2009 ST-Ericsson
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*
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* Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
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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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* AB4500 device core funtions, for client access
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*/
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#ifndef MFD_AB4500_H
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#define MFD_AB4500_H
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#include <linux/device.h>
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/*
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* AB4500 bank addresses
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*/
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#define AB4500_SYS_CTRL1_BLOCK 0x1
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#define AB4500_SYS_CTRL2_BLOCK 0x2
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#define AB4500_REGU_CTRL1 0x3
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#define AB4500_REGU_CTRL2 0x4
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#define AB4500_USB 0x5
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#define AB4500_TVOUT 0x6
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#define AB4500_DBI 0x7
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#define AB4500_ECI_AV_ACC 0x8
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#define AB4500_RESERVED 0x9
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#define AB4500_GPADC 0xA
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#define AB4500_CHARGER 0xB
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#define AB4500_GAS_GAUGE 0xC
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#define AB4500_AUDIO 0xD
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#define AB4500_INTERRUPT 0xE
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#define AB4500_RTC 0xF
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#define AB4500_MISC 0x10
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#define AB4500_DEBUG 0x12
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#define AB4500_PROD_TEST 0x13
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#define AB4500_OTP_EMUL 0x15
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/*
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* System control 1 register offsets.
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* Bank = 0x01
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*/
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#define AB4500_TURNON_STAT_REG 0x0100
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#define AB4500_RESET_STAT_REG 0x0101
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#define AB4500_PONKEY1_PRESS_STAT_REG 0x0102
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#define AB4500_FSM_STAT1_REG 0x0140
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#define AB4500_FSM_STAT2_REG 0x0141
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#define AB4500_SYSCLK_REQ_STAT_REG 0x0142
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#define AB4500_USB_STAT1_REG 0x0143
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#define AB4500_USB_STAT2_REG 0x0144
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#define AB4500_STATUS_SPARE1_REG 0x0145
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#define AB4500_STATUS_SPARE2_REG 0x0146
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#define AB4500_CTRL1_REG 0x0180
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#define AB4500_CTRL2_REG 0x0181
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/*
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* System control 2 register offsets.
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* bank = 0x02
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*/
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#define AB4500_CTRL3_REG 0x0200
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#define AB4500_MAIN_WDOG_CTRL_REG 0x0201
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#define AB4500_MAIN_WDOG_TIMER_REG 0x0202
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#define AB4500_LOW_BAT_REG 0x0203
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#define AB4500_BATT_OK_REG 0x0204
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#define AB4500_SYSCLK_TIMER_REG 0x0205
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#define AB4500_SMPSCLK_CTRL_REG 0x0206
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#define AB4500_SMPSCLK_SEL1_REG 0x0207
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#define AB4500_SMPSCLK_SEL2_REG 0x0208
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#define AB4500_SMPSCLK_SEL3_REG 0x0209
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#define AB4500_SYSULPCLK_CONF_REG 0x020A
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#define AB4500_SYSULPCLK_CTRL1_REG 0x020B
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#define AB4500_SYSCLK_CTRL_REG 0x020C
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#define AB4500_SYSCLK_REQ1_VALID_REG 0x020D
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#define AB4500_SYSCLK_REQ_VALID_REG 0x020E
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#define AB4500_SYSCTRL_SPARE_REG 0x020F
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#define AB4500_PAD_CONF_REG 0x0210
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/*
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* Regu control1 register offsets
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* Bank = 0x03
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*/
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#define AB4500_REGU_SERIAL_CTRL1_REG 0x0300
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#define AB4500_REGU_SERIAL_CTRL2_REG 0x0301
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#define AB4500_REGU_SERIAL_CTRL3_REG 0x0302
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#define AB4500_REGU_REQ_CTRL1_REG 0x0303
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#define AB4500_REGU_REQ_CTRL2_REG 0x0304
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#define AB4500_REGU_REQ_CTRL3_REG 0x0305
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#define AB4500_REGU_REQ_CTRL4_REG 0x0306
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#define AB4500_REGU_MISC1_REG 0x0380
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#define AB4500_REGU_OTGSUPPLY_CTRL_REG 0x0381
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#define AB4500_REGU_VUSB_CTRL_REG 0x0382
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#define AB4500_REGU_VAUDIO_SUPPLY_REG 0x0383
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#define AB4500_REGU_CTRL1_SPARE_REG 0x0384
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/*
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* Regu control2 Vmod register offsets
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*/
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#define AB4500_REGU_VMOD_REGU_REG 0x0440
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#define AB4500_REGU_VMOD_SEL1_REG 0x0441
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#define AB4500_REGU_VMOD_SEL2_REG 0x0442
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#define AB4500_REGU_CTRL_DISCH_REG 0x0443
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#define AB4500_REGU_CTRL_DISCH2_REG 0x0444
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/*
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* USB/ULPI register offsets
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* Bank : 0x5
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*/
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#define AB4500_USB_LINE_STAT_REG 0x0580
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#define AB4500_USB_LINE_CTRL1_REG 0x0581
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#define AB4500_USB_LINE_CTRL2_REG 0x0582
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#define AB4500_USB_LINE_CTRL3_REG 0x0583
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#define AB4500_USB_LINE_CTRL4_REG 0x0584
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#define AB4500_USB_LINE_CTRL5_REG 0x0585
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#define AB4500_USB_OTG_CTRL_REG 0x0587
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#define AB4500_USB_OTG_STAT_REG 0x0588
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#define AB4500_USB_OTG_STAT_REG 0x0588
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#define AB4500_USB_CTRL_SPARE_REG 0x0589
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#define AB4500_USB_PHY_CTRL_REG 0x058A
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/*
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* TVOUT / CTRL register offsets
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* Bank : 0x06
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*/
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#define AB4500_TVOUT_CTRL_REG 0x0680
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/*
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* DBI register offsets
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* Bank : 0x07
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*/
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#define AB4500_DBI_REG1_REG 0x0700
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#define AB4500_DBI_REG2_REG 0x0701
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/*
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* ECI regsiter offsets
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* Bank : 0x08
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*/
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#define AB4500_ECI_CTRL_REG 0x0800
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#define AB4500_ECI_HOOKLEVEL_REG 0x0801
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#define AB4500_ECI_DATAOUT_REG 0x0802
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#define AB4500_ECI_DATAIN_REG 0x0803
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/*
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* AV Connector register offsets
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* Bank : 0x08
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*/
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#define AB4500_AV_CONN_REG 0x0840
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/*
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* Accessory detection register offsets
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* Bank : 0x08
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*/
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#define AB4500_ACC_DET_DB1_REG 0x0880
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#define AB4500_ACC_DET_DB2_REG 0x0881
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/*
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* GPADC register offsets
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* Bank : 0x0A
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*/
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#define AB4500_GPADC_CTRL1_REG 0x0A00
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#define AB4500_GPADC_CTRL2_REG 0x0A01
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#define AB4500_GPADC_CTRL3_REG 0x0A02
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#define AB4500_GPADC_AUTO_TIMER_REG 0x0A03
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#define AB4500_GPADC_STAT_REG 0x0A04
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#define AB4500_GPADC_MANDATAL_REG 0x0A05
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#define AB4500_GPADC_MANDATAH_REG 0x0A06
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#define AB4500_GPADC_AUTODATAL_REG 0x0A07
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#define AB4500_GPADC_AUTODATAH_REG 0x0A08
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#define AB4500_GPADC_MUX_CTRL_REG 0x0A09
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/*
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* Charger / status register offfsets
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* Bank : 0x0B
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*/
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#define AB4500_CH_STATUS1_REG 0x0B00
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#define AB4500_CH_STATUS2_REG 0x0B01
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#define AB4500_CH_USBCH_STAT1_REG 0x0B02
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#define AB4500_CH_USBCH_STAT2_REG 0x0B03
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#define AB4500_CH_FSM_STAT_REG 0x0B04
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#define AB4500_CH_STAT_REG 0x0B05
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/*
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* Charger / control register offfsets
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* Bank : 0x0B
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*/
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#define AB4500_CH_VOLT_LVL_REG 0x0B40
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/*
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* Charger / main control register offfsets
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* Bank : 0x0B
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*/
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#define AB4500_MCH_CTRL1 0x0B80
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#define AB4500_MCH_CTRL2 0x0B81
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#define AB4500_MCH_IPT_CURLVL_REG 0x0B82
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#define AB4500_CH_WD_REG 0x0B83
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/*
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* Charger / USB control register offsets
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* Bank : 0x0B
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*/
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#define AB4500_USBCH_CTRL1_REG 0x0BC0
|
||||
#define AB4500_USBCH_CTRL2_REG 0x0BC1
|
||||
#define AB4500_USBCH_IPT_CRNTLVL_REG 0x0BC2
|
||||
|
||||
/*
|
||||
* RTC bank register offsets
|
||||
* Bank : 0xF
|
||||
*/
|
||||
#define AB4500_RTC_SOFF_STAT_REG 0x0F00
|
||||
#define AB4500_RTC_CC_CONF_REG 0x0F01
|
||||
#define AB4500_RTC_READ_REQ_REG 0x0F02
|
||||
#define AB4500_RTC_WATCH_TSECMID_REG 0x0F03
|
||||
#define AB4500_RTC_WATCH_TSECHI_REG 0x0F04
|
||||
#define AB4500_RTC_WATCH_TMIN_LOW_REG 0x0F05
|
||||
#define AB4500_RTC_WATCH_TMIN_MID_REG 0x0F06
|
||||
#define AB4500_RTC_WATCH_TMIN_HI_REG 0x0F07
|
||||
#define AB4500_RTC_ALRM_MIN_LOW_REG 0x0F08
|
||||
#define AB4500_RTC_ALRM_MIN_MID_REG 0x0F09
|
||||
#define AB4500_RTC_ALRM_MIN_HI_REG 0x0F0A
|
||||
#define AB4500_RTC_STAT_REG 0x0F0B
|
||||
#define AB4500_RTC_BKUP_CHG_REG 0x0F0C
|
||||
#define AB4500_RTC_FORCE_BKUP_REG 0x0F0D
|
||||
#define AB4500_RTC_CALIB_REG 0x0F0E
|
||||
#define AB4500_RTC_SWITCH_STAT_REG 0x0F0F
|
||||
|
||||
/*
|
||||
* PWM Out generators
|
||||
* Bank: 0x10
|
||||
*/
|
||||
#define AB4500_PWM_OUT_CTRL1_REG 0x1060
|
||||
#define AB4500_PWM_OUT_CTRL2_REG 0x1061
|
||||
#define AB4500_PWM_OUT_CTRL3_REG 0x1062
|
||||
#define AB4500_PWM_OUT_CTRL4_REG 0x1063
|
||||
#define AB4500_PWM_OUT_CTRL5_REG 0x1064
|
||||
#define AB4500_PWM_OUT_CTRL6_REG 0x1065
|
||||
#define AB4500_PWM_OUT_CTRL7_REG 0x1066
|
||||
|
||||
#define AB4500_I2C_PAD_CTRL_REG 0x1067
|
||||
#define AB4500_REV_REG 0x1080
|
||||
|
||||
/**
|
||||
* struct ab4500
|
||||
* @spi: spi device structure
|
||||
* @tx_buf: transmit buffer
|
||||
* @rx_buf: receive buffer
|
||||
* @lock: sync primitive
|
||||
*/
|
||||
struct ab4500 {
|
||||
struct spi_device *spi;
|
||||
unsigned long tx_buf[4];
|
||||
unsigned long rx_buf[4];
|
||||
struct mutex lock;
|
||||
};
|
||||
|
||||
int ab4500_write(struct ab4500 *ab4500, unsigned char block,
|
||||
unsigned long addr, unsigned char data);
|
||||
int ab4500_read(struct ab4500 *ab4500, unsigned char block,
|
||||
unsigned long addr);
|
||||
|
||||
#endif /* MFD_AB4500_H */
|
||||
Loading…
Reference in New Issue