+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Core driver for HTC PASIC3 LED/DS1WM chip.
- *
- * Copyright (C) 2006 Philipp Zabel <philipp.zabel@gmail.com>
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-
-#include <linux/gpio.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/mfd/core.h>
-#include <linux/mfd/ds1wm.h>
-#include <linux/mfd/htc-pasic3.h>
-#include <linux/slab.h>
-
-struct pasic3_data {
- void __iomem *mapping;
- unsigned int bus_shift;
-};
-
-#define REG_ADDR 5
-#define REG_DATA 6
-
-#define READ_MODE 0x80
-
-/*
- * write to a secondary register on the PASIC3
- */
-void pasic3_write_register(struct device *dev, u32 reg, u8 val)
-{
- struct pasic3_data *asic = dev_get_drvdata(dev);
- int bus_shift = asic->bus_shift;
- void __iomem *addr = asic->mapping + (REG_ADDR << bus_shift);
- void __iomem *data = asic->mapping + (REG_DATA << bus_shift);
-
- __raw_writeb(~READ_MODE & reg, addr);
- __raw_writeb(val, data);
-}
-EXPORT_SYMBOL(pasic3_write_register); /* for leds-pasic3 */
-
-/*
- * read from a secondary register on the PASIC3
- */
-u8 pasic3_read_register(struct device *dev, u32 reg)
-{
- struct pasic3_data *asic = dev_get_drvdata(dev);
- int bus_shift = asic->bus_shift;
- void __iomem *addr = asic->mapping + (REG_ADDR << bus_shift);
- void __iomem *data = asic->mapping + (REG_DATA << bus_shift);
-
- __raw_writeb(READ_MODE | reg, addr);
- return __raw_readb(data);
-}
-EXPORT_SYMBOL(pasic3_read_register); /* for leds-pasic3 */
-
-/*
- * LEDs
- */
-
-static struct mfd_cell led_cell __initdata = {
- .name = "leds-pasic3",
-};
-
-/*
- * DS1WM
- */
-
-static int ds1wm_enable(struct platform_device *pdev)
-{
- struct device *dev = pdev->dev.parent;
- int c;
-
- c = pasic3_read_register(dev, 0x28);
- pasic3_write_register(dev, 0x28, c & 0x7f);
-
- dev_dbg(dev, "DS1WM OWM_EN low (active) %02x\n", c & 0x7f);
- return 0;
-}
-
-static int ds1wm_disable(struct platform_device *pdev)
-{
- struct device *dev = pdev->dev.parent;
- int c;
-
- c = pasic3_read_register(dev, 0x28);
- pasic3_write_register(dev, 0x28, c | 0x80);
-
- dev_dbg(dev, "DS1WM OWM_EN high (inactive) %02x\n", c | 0x80);
- return 0;
-}
-
-static struct ds1wm_driver_data ds1wm_pdata = {
- .active_high = 0,
- .reset_recover_delay = 1,
-};
-
-static struct resource ds1wm_resources[] __initdata = {
- [0] = {
- .start = 0,
- .flags = IORESOURCE_MEM,
- },
- [1] = {
- .start = 0,
- .end = 0,
- .flags = IORESOURCE_IRQ,
- },
-};
-
-static const struct mfd_cell ds1wm_cell __initconst = {
- .name = "ds1wm",
- .enable = ds1wm_enable,
- .disable = ds1wm_disable,
- .platform_data = &ds1wm_pdata,
- .pdata_size = sizeof(ds1wm_pdata),
- .num_resources = 2,
- .resources = ds1wm_resources,
-};
-
-static int __init pasic3_probe(struct platform_device *pdev)
-{
- struct pasic3_platform_data *pdata = dev_get_platdata(&pdev->dev);
- struct device *dev = &pdev->dev;
- struct pasic3_data *asic;
- struct resource *r;
- int ret;
- int irq = 0;
-
- r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (r) {
- ds1wm_resources[1].flags = IORESOURCE_IRQ | (r->flags &
- (IORESOURCE_IRQ_HIGHEDGE | IORESOURCE_IRQ_LOWEDGE));
- irq = r->start;
- }
-
- r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!r)
- return -ENXIO;
-
- if (!request_mem_region(r->start, resource_size(r), "pasic3"))
- return -EBUSY;
-
- asic = devm_kzalloc(dev, sizeof(struct pasic3_data), GFP_KERNEL);
- if (!asic)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, asic);
-
- asic->mapping = ioremap(r->start, resource_size(r));
- if (!asic->mapping) {
- dev_err(dev, "couldn't ioremap PASIC3\n");
- return -ENOMEM;
- }
-
- /* calculate bus shift from mem resource */
- asic->bus_shift = (resource_size(r) - 5) >> 3;
-
- if (pdata && pdata->clock_rate) {
- ds1wm_pdata.clock_rate = pdata->clock_rate;
- /* the first 5 PASIC3 registers control the DS1WM */
- ds1wm_resources[0].end = (5 << asic->bus_shift) - 1;
- ret = mfd_add_devices(&pdev->dev, pdev->id,
- &ds1wm_cell, 1, r, irq, NULL);
- if (ret < 0)
- dev_warn(dev, "failed to register DS1WM\n");
- }
-
- if (pdata && pdata->led_pdata) {
- led_cell.platform_data = pdata->led_pdata;
- led_cell.pdata_size = sizeof(struct pasic3_leds_machinfo);
- ret = mfd_add_devices(&pdev->dev, pdev->id, &led_cell, 1, r,
- 0, NULL);
- if (ret < 0)
- dev_warn(dev, "failed to register LED device\n");
- }
-
- return 0;
-}
-
-static int pasic3_remove(struct platform_device *pdev)
-{
- struct pasic3_data *asic = platform_get_drvdata(pdev);
- struct resource *r;
-
- mfd_remove_devices(&pdev->dev);
-
- iounmap(asic->mapping);
- r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(r->start, resource_size(r));
- return 0;
-}
-
-MODULE_ALIAS("platform:pasic3");
-
-static struct platform_driver pasic3_driver = {
- .driver = {
- .name = "pasic3",
- },
- .remove = pasic3_remove,
-};
-
-module_platform_driver_probe(pasic3_driver, pasic3_probe);
-
-MODULE_AUTHOR("Philipp Zabel <philipp.zabel@gmail.com>");
-MODULE_DESCRIPTION("Core driver for HTC PASIC3");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * HTC PASIC3 driver - LEDs and DS1WM
- *
- * Copyright (c) 2007 Philipp Zabel <philipp.zabel@gmail.com>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for
- * more details.
- *
- */
-
-#ifndef __PASIC3_H
-#define __PASIC3_H
-
-#include <linux/platform_device.h>
-#include <linux/leds.h>
-
-extern void pasic3_write_register(struct device *dev, u32 reg, u8 val);
-extern u8 pasic3_read_register(struct device *dev, u32 reg);
-
-/*
- * mask for registers 0x20,0x21,0x22
- */
-#define PASIC3_MASK_LED0 0x04
-#define PASIC3_MASK_LED1 0x08
-#define PASIC3_MASK_LED2 0x40
-
-/*
- * bits in register 0x06
- */
-#define PASIC3_BIT2_LED0 0x08
-#define PASIC3_BIT2_LED1 0x10
-#define PASIC3_BIT2_LED2 0x20
-
-struct pasic3_led {
- struct led_classdev led;
- unsigned int hw_num;
- unsigned int bit2;
- unsigned int mask;
- struct pasic3_leds_machinfo *pdata;
-};
-
-struct pasic3_leds_machinfo {
- unsigned int num_leds;
- unsigned int power_gpio;
- struct pasic3_led *leds;
-};
-
-struct pasic3_platform_data {
- struct pasic3_leds_machinfo *led_pdata;
- unsigned int clock_rate;
-};
-
-#endif
projects / platform / kernel / linux-rpi.git / commitdiff