From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- drivers/mfd/htc-pasic3.c | 225 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 225 insertions(+) create mode 100644 drivers/mfd/htc-pasic3.c (limited to 'drivers/mfd/htc-pasic3.c') diff --git a/drivers/mfd/htc-pasic3.c b/drivers/mfd/htc-pasic3.c new file mode 100644 index 00000000..04c7093d --- /dev/null +++ b/drivers/mfd/htc-pasic3.c @@ -0,0 +1,225 @@ +/* + * Core driver for HTC PASIC3 LED/DS1WM chip. + * + * Copyright (C) 2006 Philipp Zabel + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + */ + +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +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 struct mfd_cell ds1wm_cell __initdata = { + .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 = pdev->dev.platform_data; + 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 = kzalloc(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"); + kfree(asic); + 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); + 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); + 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)); + kfree(asic); + return 0; +} + +MODULE_ALIAS("platform:pasic3"); + +static struct platform_driver pasic3_driver = { + .driver = { + .name = "pasic3", + }, + .remove = pasic3_remove, +}; + +static int __init pasic3_base_init(void) +{ + return platform_driver_probe(&pasic3_driver, pasic3_probe); +} + +static void __exit pasic3_base_exit(void) +{ + platform_driver_unregister(&pasic3_driver); +} + +module_init(pasic3_base_init); +module_exit(pasic3_base_exit); + +MODULE_AUTHOR("Philipp Zabel "); +MODULE_DESCRIPTION("Core driver for HTC PASIC3"); +MODULE_LICENSE("GPL"); -- cgit