From 392e8802486cb573b916e746010e141a75f507e6 Mon Sep 17 00:00:00 2001 From: Kevin Date: Sat, 15 Nov 2014 09:58:27 +0800 Subject: init android origin source code --- ANDROID_3.4.5/arch/arm/mach-omap2/sr_device.c | 141 ++++++++++++++++++++++++++ 1 file changed, 141 insertions(+) create mode 100644 ANDROID_3.4.5/arch/arm/mach-omap2/sr_device.c (limited to 'ANDROID_3.4.5/arch/arm/mach-omap2/sr_device.c') diff --git a/ANDROID_3.4.5/arch/arm/mach-omap2/sr_device.c b/ANDROID_3.4.5/arch/arm/mach-omap2/sr_device.c new file mode 100644 index 00000000..a503e1e8 --- /dev/null +++ b/ANDROID_3.4.5/arch/arm/mach-omap2/sr_device.c @@ -0,0 +1,141 @@ +/* + * OMAP3/OMAP4 smartreflex device file + * + * Author: Thara Gopinath + * + * Based originally on code from smartreflex.c + * Copyright (C) 2010 Texas Instruments, Inc. + * Thara Gopinath + * + * Copyright (C) 2008 Nokia Corporation + * Kalle Jokiniemi + * + * Copyright (C) 2007 Texas Instruments, Inc. + * Lesly A M + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include + +#include + +#include "smartreflex.h" +#include "voltage.h" +#include "control.h" +#include "pm.h" + +static bool sr_enable_on_init; + +/* Read EFUSE values from control registers for OMAP3430 */ +static void __init sr_set_nvalues(struct omap_volt_data *volt_data, + struct omap_sr_data *sr_data) +{ + struct omap_sr_nvalue_table *nvalue_table; + int i, count = 0; + + while (volt_data[count].volt_nominal) + count++; + + nvalue_table = kzalloc(sizeof(struct omap_sr_nvalue_table)*count, + GFP_KERNEL); + + for (i = 0; i < count; i++) { + u32 v; + /* + * In OMAP4 the efuse registers are 24 bit aligned. + * A __raw_readl will fail for non-32 bit aligned address + * and hence the 8-bit read and shift. + */ + if (cpu_is_omap44xx()) { + u16 offset = volt_data[i].sr_efuse_offs; + + v = omap_ctrl_readb(offset) | + omap_ctrl_readb(offset + 1) << 8 | + omap_ctrl_readb(offset + 2) << 16; + } else { + v = omap_ctrl_readl(volt_data[i].sr_efuse_offs); + } + + nvalue_table[i].efuse_offs = volt_data[i].sr_efuse_offs; + nvalue_table[i].nvalue = v; + } + + sr_data->nvalue_table = nvalue_table; + sr_data->nvalue_count = count; +} + +static int __init sr_dev_init(struct omap_hwmod *oh, void *user) +{ + struct omap_sr_data *sr_data; + struct platform_device *pdev; + struct omap_volt_data *volt_data; + struct omap_smartreflex_dev_attr *sr_dev_attr; + char *name = "smartreflex"; + static int i; + + sr_data = kzalloc(sizeof(struct omap_sr_data), GFP_KERNEL); + if (!sr_data) { + pr_err("%s: Unable to allocate memory for %s sr_data.Error!\n", + __func__, oh->name); + return -ENOMEM; + } + + sr_dev_attr = (struct omap_smartreflex_dev_attr *)oh->dev_attr; + if (!sr_dev_attr || !sr_dev_attr->sensor_voltdm_name) { + pr_err("%s: No voltage domain specified for %s." + "Cannot initialize\n", __func__, + oh->name); + goto exit; + } + + sr_data->ip_type = oh->class->rev; + sr_data->senn_mod = 0x1; + sr_data->senp_mod = 0x1; + + sr_data->voltdm = voltdm_lookup(sr_dev_attr->sensor_voltdm_name); + if (IS_ERR(sr_data->voltdm)) { + pr_err("%s: Unable to get voltage domain pointer for VDD %s\n", + __func__, sr_dev_attr->sensor_voltdm_name); + goto exit; + } + + omap_voltage_get_volttable(sr_data->voltdm, &volt_data); + if (!volt_data) { + pr_warning("%s: No Voltage table registerd fo VDD%d." + "Something really wrong\n\n", __func__, i + 1); + goto exit; + } + + sr_set_nvalues(volt_data, sr_data); + + sr_data->enable_on_init = sr_enable_on_init; + + pdev = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data), + NULL, 0, 0); + if (IS_ERR(pdev)) + pr_warning("%s: Could not build omap_device for %s: %s.\n\n", + __func__, name, oh->name); +exit: + i++; + kfree(sr_data); + return 0; +} + +/* + * API to be called from board files to enable smartreflex + * autocompensation at init. + */ +void __init omap_enable_smartreflex_on_init(void) +{ + sr_enable_on_init = true; +} + +int __init omap_devinit_smartreflex(void) +{ + return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL); +} -- cgit