This patch adds support for device registration of various smartreflex module present in the system. This patch introduces the platform data for smartreflex devices which include the efused and test n-target vaules, module enable/disable pointers and a parameter to indicate whether smartreflex autocompensation needs to be enabled on init or not. Currently auocompensation is enabled on init by default for OMAP3430 ES3.1 chip.
Signed-off-by: Thara Gopinath <th...@ti.com> --- arch/arm/mach-omap2/Makefile | 2 +- arch/arm/mach-omap2/sr_device.c | 185 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 186 insertions(+), 1 deletions(-) create mode 100644 arch/arm/mach-omap2/sr_device.c diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index 0754886..f259bb8 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -53,7 +53,7 @@ obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o voltage.o \ cpuidle34xx.o obj-$(CONFIG_ARCH_OMAP4) += pm44xx.o obj-$(CONFIG_PM_DEBUG) += pm-debug.o -obj-$(CONFIG_OMAP_SMARTREFLEX) += smartreflex.o +obj-$(CONFIG_OMAP_SMARTREFLEX) += sr_device.o smartreflex.o AFLAGS_sleep24xx.o :=-Wa,-march=armv6 AFLAGS_sleep34xx.o :=-Wa,-march=armv7-a diff --git a/arch/arm/mach-omap2/sr_device.c b/arch/arm/mach-omap2/sr_device.c new file mode 100644 index 0000000..3bd0170 --- /dev/null +++ b/arch/arm/mach-omap2/sr_device.c @@ -0,0 +1,185 @@ +/* + * OMAP3/OMAP4 smartreflex device file + * + * Author: Thara Gopinath <th...@ti.com> + * + * Based originally on code from smartreflex.c + * Copyright (C) 2010 Texas Instruments, Inc. + * Thara Gopinath <th...@ti.com> + * + * Copyright (C) 2008 Nokia Corporation + * Kalle Jokiniemi + * + * Copyright (C) 2007 Texas Instruments, Inc. + * Lesly A M <x0080...@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/control.h> +#include <plat/omap_hwmod.h> +#include <plat/omap_device.h> +#include <plat/opp.h> +#include <plat/smartreflex.h> +#include <plat/voltage.h> + +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_read_efuse(struct omap_sr_dev_data *dev_data, + struct omap_sr_data *sr_data) +{ + int i; + + if (!dev_data || !dev_data->volts_supported || !dev_data->volt_data || + !dev_data->efuse_nvalues_offs) { + pr_warning("%s: Bad parameters! dev_data = %x," + "dev_data->volts_supported = %x," + "dev_data->volt_data = %x," + "dev_data->efuse_nvalues_offs = %x\n", __func__, + (unsigned int)dev_data, dev_data->volts_supported, + (unsigned int)dev_data->volt_data, + (unsigned int)dev_data->efuse_nvalues_offs); + return; + } + + /* + * From OMAP3630 onwards there are no efuse registers for senn_mod + * and senp_mod. They have to be 0x1 by default. + */ + if (!dev_data->efuse_sr_control) { + sr_data->senn_mod = 0x1; + sr_data->senp_mod = 0x1; + } else { + sr_data->senn_mod = + ((omap_ctrl_readl(dev_data->efuse_sr_control) & + (0x3 << dev_data->sennenable_shift)) >> + dev_data->sennenable_shift); + sr_data->senp_mod = + ((omap_ctrl_readl(dev_data->efuse_sr_control) & + (0x3 << dev_data->senpenable_shift)) >> + dev_data->senpenable_shift); + } + + for (i = 0; i < dev_data->volts_supported; i++) + dev_data->volt_data[i].sr_nvalue = omap_ctrl_readl( + dev_data->efuse_nvalues_offs[i]); +} + +/* + * Hard coded nvalues for testing purposes for OMAP3430, + * may cause device to hang! + */ +static void __init sr_set_testing_nvalues(struct omap_sr_dev_data *dev_data, + struct omap_sr_data *sr_data) +{ + int i; + + if (!dev_data || !dev_data->volts_supported || + !dev_data->volt_data || !dev_data->test_nvalues) { + pr_warning("%s: Bad parameters! dev_data = %x," + "dev_data->volts_supported = %x," + "dev_data->volt_data = %x," + "dev_data->test_nvalues = %x\n", __func__, + (unsigned int)dev_data, dev_data->volts_supported, + (unsigned int)dev_data->volt_data, + (unsigned int)dev_data->test_nvalues); + return; + } + + sr_data->senn_mod = dev_data->test_sennenable; + sr_data->senp_mod = dev_data->test_senpenable; + for (i = 0; i < dev_data->volts_supported; i++) + dev_data->volt_data[i].sr_nvalue = dev_data->test_nvalues[i]; +} + +static void __init sr_set_nvalues(struct omap_sr_dev_data *dev_data, + struct omap_sr_data *sr_data) +{ + if (SR_TESTING_NVALUES) + sr_set_testing_nvalues(dev_data, sr_data); + else + sr_read_efuse(dev_data, sr_data); +} + +static int sr_dev_init(struct omap_hwmod *oh, void *user) +{ + struct omap_sr_data *sr_data; + struct omap_sr_dev_data *sr_dev_data; + struct omap_device *od; + 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_data = (struct omap_sr_dev_data *)oh->dev_attr; + if (unlikely(!sr_dev_data)) { + pr_err("%s: dev atrribute is NULL\n", __func__); + goto exit; + } + + /* + * OMAP3430 ES3.1 chips by default come with Efuse burnt + * with parameters required for full functionality of + * smartreflex AVS feature like ntarget values , sennenable + * and senpenable. So enable the SR AVS feature during boot up + * itself if it is a OMAP3430 ES3.1 chip. + */ + if (cpu_is_omap343x()) { + if (omap_rev() == OMAP3430_REV_ES3_1) + sr_data->enable_on_init = true; + else + sr_data->enable_on_init = false; + } else { + sr_data->enable_on_init = false; + } + sr_data->device_enable = omap_device_enable; + sr_data->device_shutdown = omap_device_shutdown; + sr_data->device_idle = omap_device_idle; + sr_data->voltdm = omap_voltage_domain_get(sr_dev_data->vdd_name); + if (IS_ERR(sr_data->voltdm)) { + pr_err("%s: Unable to get voltage domain pointer for VDD %s\n", + __func__, sr_dev_data->vdd_name); + goto exit; + } + sr_dev_data->volts_supported = omap_voltage_get_volttable( + sr_data->voltdm, &sr_dev_data->volt_data); + if (!sr_dev_data->volts_supported) { + pr_warning("%s: No Voltage table registerd fo VDD%d." + "Something really wrong\n\n", __func__, i + 1); + goto exit; + } + sr_set_nvalues(sr_dev_data, sr_data); + 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; +} + +static int __init omap_devinit_smartreflex(void) +{ + return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL); +} +device_initcall(omap_devinit_smartreflex); -- 1.7.1.GIT -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html