diff options
author | Kevin Hilman <khilman@ti.com> | 2011-03-21 14:29:13 -0700 |
---|---|---|
committer | Kevin Hilman <khilman@ti.com> | 2011-09-15 11:39:11 -0700 |
commit | 01f48d308db1cfcfb0151d8d91153fd73e84ae40 (patch) | |
tree | 2b36a459bb9ea482cdf60cfaf79c4e4996d599dc /arch/arm/mach-omap2/voltage.c | |
parent | 4d47506a85a9f2e745dc63215594e9f799aff3dc (diff) | |
download | linux-01f48d308db1cfcfb0151d8d91153fd73e84ae40.tar.bz2 |
OMAP2+: voltage: split out voltage processor (VP) code into new layer
This patch is primarily a move of VP specific code from voltage.c into
its own code in vp.c and adds prototypes to vp.h
No functional changes, except debugfs...
VP debugfs moved to 'vp' subdir of <debugfs>/voltage/ and 'vp_'
prefixes removed from all debugfs filenames.
Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'arch/arm/mach-omap2/voltage.c')
-rw-r--r-- | arch/arm/mach-omap2/voltage.c | 348 |
1 files changed, 3 insertions, 345 deletions
diff --git a/arch/arm/mach-omap2/voltage.c b/arch/arm/mach-omap2/voltage.c index e1a22a3d2f03..9b9f01973d12 100644 --- a/arch/arm/mach-omap2/voltage.c +++ b/arch/arm/mach-omap2/voltage.c @@ -46,10 +46,6 @@ static LIST_HEAD(voltdm_list); #define VOLTAGE_DIR_SIZE 16 static struct dentry *voltage_dir; -/* Init function pointers */ -static int vp_forceupdate_scale_voltage(struct voltagedomain *voltdm, - unsigned long target_volt); - static u32 omap3_voltage_read_reg(u16 mod, u8 offset) { return omap2_prm_read_mod_reg(mod, offset); @@ -105,7 +101,7 @@ static int __init _config_common_vdd_data(struct voltagedomain *voltdm) sys_clk_speed /= 1000; /* Generic voltage parameters */ - vdd->volt_scale = vp_forceupdate_scale_voltage; + vdd->volt_scale = omap_vp_forceupdate_scale; vdd->vp_enabled = false; vdd->vp_rt_data.vpconfig_erroroffset = @@ -127,30 +123,6 @@ static int __init _config_common_vdd_data(struct voltagedomain *voltdm) return 0; } -/* Voltage debugfs support */ -static int vp_volt_debug_get(void *data, u64 *val) -{ - struct voltagedomain *voltdm = (struct voltagedomain *)data; - struct omap_vdd_info *vdd = voltdm->vdd; - u8 vsel; - - if (!vdd) { - pr_warning("Wrong paramater passed\n"); - return -EINVAL; - } - - vsel = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->voltage); - - if (!vdd->pmic_info->vsel_to_uv) { - pr_warning("PMIC function to convert vsel to voltage" - "in uV not registerd\n"); - return -EINVAL; - } - - *val = vdd->pmic_info->vsel_to_uv(vsel); - return 0; -} - static int nom_volt_debug_get(void *data, u64 *val) { struct voltagedomain *voltdm = (struct voltagedomain *)data; @@ -165,85 +137,8 @@ static int nom_volt_debug_get(void *data, u64 *val) return 0; } -DEFINE_SIMPLE_ATTRIBUTE(vp_volt_debug_fops, vp_volt_debug_get, NULL, "%llu\n"); DEFINE_SIMPLE_ATTRIBUTE(nom_volt_debug_fops, nom_volt_debug_get, NULL, "%llu\n"); -static void vp_latch_vsel(struct voltagedomain *voltdm) -{ - u32 vpconfig; - unsigned long uvdc; - char vsel; - struct omap_vdd_info *vdd = voltdm->vdd; - - uvdc = omap_voltage_get_nom_volt(voltdm); - if (!uvdc) { - pr_warning("%s: unable to find current voltage for vdd_%s\n", - __func__, voltdm->name); - return; - } - - if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) { - pr_warning("%s: PMIC function to convert voltage in uV to" - " vsel not registered\n", __func__); - return; - } - - vsel = vdd->pmic_info->uv_to_vsel(uvdc); - - vpconfig = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - vpconfig &= ~(vdd->vp_data->vp_common->vpconfig_initvoltage_mask | - vdd->vp_data->vp_common->vpconfig_initvdd); - vpconfig |= vsel << vdd->vp_data->vp_common->vpconfig_initvoltage_shift; - - vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - - /* Trigger initVDD value copy to voltage processor */ - vdd->write_reg((vpconfig | vdd->vp_data->vp_common->vpconfig_initvdd), - vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - - /* Clear initVDD copy trigger bit */ - vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); -} - -/* Generic voltage init functions */ -static void __init vp_init(struct voltagedomain *voltdm) -{ - struct omap_vdd_info *vdd = voltdm->vdd; - u32 vp_val; - - if (!vdd->read_reg || !vdd->write_reg) { - pr_err("%s: No read/write API for accessing vdd_%s regs\n", - __func__, voltdm->name); - return; - } - - vp_val = vdd->vp_rt_data.vpconfig_erroroffset | - (vdd->vp_rt_data.vpconfig_errorgain << - vdd->vp_data->vp_common->vpconfig_errorgain_shift) | - vdd->vp_data->vp_common->vpconfig_timeouten; - vdd->write_reg(vp_val, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - - vp_val = ((vdd->vp_rt_data.vstepmin_smpswaittimemin << - vdd->vp_data->vp_common->vstepmin_smpswaittimemin_shift) | - (vdd->vp_rt_data.vstepmin_stepmin << - vdd->vp_data->vp_common->vstepmin_stepmin_shift)); - vdd->write_reg(vp_val, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vstepmin); - - vp_val = ((vdd->vp_rt_data.vstepmax_smpswaittimemax << - vdd->vp_data->vp_common->vstepmax_smpswaittimemax_shift) | - (vdd->vp_rt_data.vstepmax_stepmax << - vdd->vp_data->vp_common->vstepmax_stepmax_shift)); - vdd->write_reg(vp_val, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vstepmax); - - vp_val = ((vdd->vp_rt_data.vlimitto_vddmax << - vdd->vp_data->vp_common->vlimitto_vddmax_shift) | - (vdd->vp_rt_data.vlimitto_vddmin << - vdd->vp_data->vp_common->vlimitto_vddmin_shift) | - (vdd->vp_rt_data.vlimitto_timeout << - vdd->vp_data->vp_common->vlimitto_timeout_shift)); - vdd->write_reg(vp_val, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vlimitto); -} - static void __init vdd_debugfs_init(struct voltagedomain *voltdm) { char *name; @@ -268,125 +163,11 @@ static void __init vdd_debugfs_init(struct voltagedomain *voltdm) return; } - (void) debugfs_create_x16("vp_errorgain", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vpconfig_errorgain)); - (void) debugfs_create_x16("vp_smpswaittimemin", S_IRUGO, - vdd->debug_dir, - &(vdd->vp_rt_data.vstepmin_smpswaittimemin)); - (void) debugfs_create_x8("vp_stepmin", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vstepmin_stepmin)); - (void) debugfs_create_x16("vp_smpswaittimemax", S_IRUGO, - vdd->debug_dir, - &(vdd->vp_rt_data.vstepmax_smpswaittimemax)); - (void) debugfs_create_x8("vp_stepmax", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vstepmax_stepmax)); - (void) debugfs_create_x8("vp_vddmax", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vlimitto_vddmax)); - (void) debugfs_create_x8("vp_vddmin", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vlimitto_vddmin)); - (void) debugfs_create_x16("vp_timeout", S_IRUGO, vdd->debug_dir, - &(vdd->vp_rt_data.vlimitto_timeout)); - (void) debugfs_create_file("curr_vp_volt", S_IRUGO, vdd->debug_dir, - (void *) voltdm, &vp_volt_debug_fops); (void) debugfs_create_file("curr_nominal_volt", S_IRUGO, vdd->debug_dir, (void *) voltdm, &nom_volt_debug_fops); } -/* VP force update method of voltage scaling */ -static int vp_forceupdate_scale_voltage(struct voltagedomain *voltdm, - unsigned long target_volt) -{ - struct omap_vdd_info *vdd = voltdm->vdd; - u32 vpconfig; - u8 target_vsel, current_vsel; - int ret, timeout = 0; - - ret = omap_vc_pre_scale(voltdm, target_volt, &target_vsel, ¤t_vsel); - if (ret) - return ret; - - /* - * Clear all pending TransactionDone interrupt/status. Typical latency - * is <3us - */ - while (timeout++ < VP_TRANXDONE_TIMEOUT) { - vdd->write_reg(vdd->vp_data->prm_irqst_data->tranxdone_status, - vdd->prm_irqst_mod, vdd->prm_irqst_reg); - if (!(vdd->read_reg(vdd->prm_irqst_mod, vdd->prm_irqst_reg) & - vdd->vp_data->prm_irqst_data->tranxdone_status)) - break; - udelay(1); - } - if (timeout >= VP_TRANXDONE_TIMEOUT) { - pr_warning("%s: vdd_%s TRANXDONE timeout exceeded." - "Voltage change aborted", __func__, voltdm->name); - return -ETIMEDOUT; - } - - /* Configure for VP-Force Update */ - vpconfig = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - vpconfig &= ~(vdd->vp_data->vp_common->vpconfig_initvdd | - vdd->vp_data->vp_common->vpconfig_forceupdate | - vdd->vp_data->vp_common->vpconfig_initvoltage_mask); - vpconfig |= ((target_vsel << - vdd->vp_data->vp_common->vpconfig_initvoltage_shift)); - vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - - /* Trigger initVDD value copy to voltage processor */ - vpconfig |= vdd->vp_data->vp_common->vpconfig_initvdd; - vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - - /* Force update of voltage */ - vpconfig |= vdd->vp_data->vp_common->vpconfig_forceupdate; - vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - - /* - * Wait for TransactionDone. Typical latency is <200us. - * Depends on SMPSWAITTIMEMIN/MAX and voltage change - */ - timeout = 0; - omap_test_timeout((vdd->read_reg(vdd->prm_irqst_mod, - vdd->prm_irqst_reg) & - vdd->vp_data->prm_irqst_data->tranxdone_status), - VP_TRANXDONE_TIMEOUT, timeout); - if (timeout >= VP_TRANXDONE_TIMEOUT) - pr_err("%s: vdd_%s TRANXDONE timeout exceeded." - "TRANXDONE never got set after the voltage update\n", - __func__, voltdm->name); - - omap_vc_post_scale(voltdm, target_volt, target_vsel, current_vsel); - - /* - * Disable TransactionDone interrupt , clear all status, clear - * control registers - */ - timeout = 0; - while (timeout++ < VP_TRANXDONE_TIMEOUT) { - vdd->write_reg(vdd->vp_data->prm_irqst_data->tranxdone_status, - vdd->prm_irqst_mod, vdd->prm_irqst_reg); - if (!(vdd->read_reg(vdd->prm_irqst_mod, vdd->prm_irqst_reg) & - vdd->vp_data->prm_irqst_data->tranxdone_status)) - break; - udelay(1); - } - - if (timeout >= VP_TRANXDONE_TIMEOUT) - pr_warning("%s: vdd_%s TRANXDONE timeout exceeded while trying" - "to clear the TRANXDONE status\n", - __func__, voltdm->name); - - vpconfig = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - /* Clear initVDD copy trigger bit */ - vpconfig &= ~vdd->vp_data->vp_common->vpconfig_initvdd; - vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - /* Clear force bit */ - vpconfig &= ~vdd->vp_data->vp_common->vpconfig_forceupdate; - vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - - return 0; -} - static int __init omap_vdd_data_configure(struct voltagedomain *voltdm) { struct omap_vdd_info *vdd = voltdm->vdd; @@ -439,129 +220,6 @@ unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm) } /** - * omap_vp_get_curr_volt() - API to get the current vp voltage. - * @voltdm: pointer to the VDD. - * - * This API returns the current voltage for the specified voltage processor - */ -unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm) -{ - struct omap_vdd_info *vdd; - u8 curr_vsel; - - if (!voltdm || IS_ERR(voltdm)) { - pr_warning("%s: VDD specified does not exist!\n", __func__); - return 0; - } - - vdd = voltdm->vdd; - if (!vdd->read_reg) { - pr_err("%s: No read API for reading vdd_%s regs\n", - __func__, voltdm->name); - return 0; - } - - curr_vsel = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->voltage); - - if (!vdd->pmic_info || !vdd->pmic_info->vsel_to_uv) { - pr_warning("%s: PMIC function to convert vsel to voltage" - "in uV not registerd\n", __func__); - return 0; - } - - return vdd->pmic_info->vsel_to_uv(curr_vsel); -} - -/** - * omap_vp_enable() - API to enable a particular VP - * @voltdm: pointer to the VDD whose VP is to be enabled. - * - * This API enables a particular voltage processor. Needed by the smartreflex - * class drivers. - */ -void omap_vp_enable(struct voltagedomain *voltdm) -{ - struct omap_vdd_info *vdd; - u32 vpconfig; - - if (!voltdm || IS_ERR(voltdm)) { - pr_warning("%s: VDD specified does not exist!\n", __func__); - return; - } - - vdd = voltdm->vdd; - if (!vdd->read_reg || !vdd->write_reg) { - pr_err("%s: No read/write API for accessing vdd_%s regs\n", - __func__, voltdm->name); - return; - } - - /* If VP is already enabled, do nothing. Return */ - if (vdd->vp_enabled) - return; - - vp_latch_vsel(voltdm); - - /* Enable VP */ - vpconfig = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - vpconfig |= vdd->vp_data->vp_common->vpconfig_vpenable; - vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - vdd->vp_enabled = true; -} - -/** - * omap_vp_disable() - API to disable a particular VP - * @voltdm: pointer to the VDD whose VP is to be disabled. - * - * This API disables a particular voltage processor. Needed by the smartreflex - * class drivers. - */ -void omap_vp_disable(struct voltagedomain *voltdm) -{ - struct omap_vdd_info *vdd; - u32 vpconfig; - int timeout; - - if (!voltdm || IS_ERR(voltdm)) { - pr_warning("%s: VDD specified does not exist!\n", __func__); - return; - } - - vdd = voltdm->vdd; - if (!vdd->read_reg || !vdd->write_reg) { - pr_err("%s: No read/write API for accessing vdd_%s regs\n", - __func__, voltdm->name); - return; - } - - /* If VP is already disabled, do nothing. Return */ - if (!vdd->vp_enabled) { - pr_warning("%s: Trying to disable VP for vdd_%s when" - "it is already disabled\n", __func__, voltdm->name); - return; - } - - /* Disable VP */ - vpconfig = vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - vpconfig &= ~vdd->vp_data->vp_common->vpconfig_vpenable; - vdd->write_reg(vpconfig, vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vpconfig); - - /* - * Wait for VP idle Typical latency is <2us. Maximum latency is ~100us - */ - omap_test_timeout((vdd->read_reg(vdd->vp_data->vp_common->prm_mod, vdd->vp_data->vstatus)), - VP_IDLE_TIMEOUT, timeout); - - if (timeout >= VP_IDLE_TIMEOUT) - pr_warning("%s: vdd_%s idle timedout\n", - __func__, voltdm->name); - - vdd->vp_enabled = false; - - return; -} - -/** * omap_voltage_scale_vdd() - API to scale voltage of a particular * voltage domain. * @voltdm: pointer to the VDD which is to be scaled. @@ -766,7 +424,7 @@ void omap_change_voltscale_method(struct voltagedomain *voltdm, switch (voltscale_method) { case VOLTSCALE_VPFORCEUPDATE: - vdd->volt_scale = vp_forceupdate_scale_voltage; + vdd->volt_scale = omap_vp_forceupdate_scale; return; case VOLTSCALE_VCBYPASS: vdd->volt_scale = omap_vc_bypass_scale; @@ -810,8 +468,8 @@ int __init omap_voltage_late_init(void) if (voltdm->vdd) { if (omap_vdd_data_configure(voltdm)) continue; - vp_init(voltdm); vdd_debugfs_init(voltdm); + omap_vp_init(voltdm); } } |