diff options
Diffstat (limited to 'arch/arm/mach-omap2/sr_device.c')
| -rw-r--r-- | arch/arm/mach-omap2/sr_device.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/sr_device.c b/arch/arm/mach-omap2/sr_device.c new file mode 100644 index 00000000000..9a3538fb633 --- /dev/null +++ b/arch/arm/mach-omap2/sr_device.c @@ -0,0 +1,131 @@ +/* + * OMAP3/OMAP4 smartreflex device file + * + * Author: Thara Gopinath <thara@ti.com> + * + * Based originally on code from smartreflex.c + * Copyright (C) 2010 Texas Instruments, Inc. + * Thara Gopinath <thara@ti.com> + * + * Copyright (C) 2008 Nokia Corporation + * Kalle Jokiniemi + * + * Copyright (C) 2007 Texas Instruments, Inc. + * Lesly A M <x0080970@ti.com> + * + * 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 <linux/err.h> +#include <linux/slab.h> + +#include <plat/omap_device.h> +#include <plat/smartreflex.h> +#include <plat/voltage.h> + +#include "control.h" + +static bool sr_enable_on_init; + +static struct omap_device_pm_latency omap_sr_latency[] = { + { + .deactivate_func = omap_device_idle_hwmods, + .activate_func = omap_device_enable_hwmods, + .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST + }, +}; + +/* 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 = 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 sr_dev_init(struct omap_hwmod *oh, void *user) +{ + struct omap_sr_data *sr_data; + struct omap_device *od; + struct omap_volt_data *volt_data; + 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; + } + + if (!oh->vdd_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 = omap_voltage_domain_lookup(oh->vdd_name); + if (IS_ERR(sr_data->voltdm)) { + pr_err("%s: Unable to get voltage domain pointer for VDD %s\n", + __func__, oh->vdd_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; + + od = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data), + omap_sr_latency, + ARRAY_SIZE(omap_sr_latency), 0); + if (IS_ERR(od)) + 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); +} |