Hi Nishanth,
I have one small comment on the actual implementation
> + do {
> + value = prm_read_mod_reg(OMAP3430_GR_MOD,
> + OMAP3_PRM_VC_BYPASS_VAL_OFFSET)
> + & OMAP3430_VALID;
> + /* should i wait? */
> + if (value && (count % 50))
> + udelay(10);
> + count--;
> + *timeout_us -= 5;
> + } while (value && count);
Why are you removing 5us every read ?
If 50 iteration is 1us and we delay every loop by 10us we should remove 11us
Shouldn't it be:
+ do {
+ value = prm_read_mod_reg(OMAP3430_GR_MOD,
+ OMAP3_PRM_VC_BYPASS_VAL_OFFSET)
+ & OMAP3430_VALID;
+ /* should i wait? */
+ if (value && (count % 50)) {
+ udelay(10);
+ *timeout_us -= 11;
+ }
+ count--;
+ } while (value && count);
Hope this helps
Br
Guilhem
> -----Original Message-----
> From: Nishanth Menon [mailto:nm@xxxxxx]
> Sent: Thursday, October 22, 2009 7:28 PM
> To: linux-omap
> Cc: Nishanth Menon; Rajendra Nayak; Roger Quadros; Kalle
> Jokiniemi; Teerth Reddy; Kevin Hilman; Paul Walmsley;
> Högander Jouni; Mike Chan; Imberton Guilhem-gimb01
> Subject: [PATCH 2/2 v2] OMAP3:PM:SR: SmartReflex Refactor Rev3.0
>
> **-- SNIP ME
> V3 - Bunch of changes:
> * Introduce debugfs entries for SR - since these
> are variable updates, you can essentially do what we do
> with test values, change things but without a rebuild!
> * Removed the test values altogether
> * srid is standardised to u8 and it is not a bit field
> * Guilhem's changes for non-twl5030 PMIC incorporated
> * uses ioremap
> V2 - made possible to work with non twl5030 PMICs
> V1 - original rewrite
> **-- END OF SNIP ME
>
> Refactor the smart reflex implementation.
>
> Original implementation summary:
> Eduardo Valentin (1):
> OMAP3: PM: SmartReflex: Fix scheduled while atomic problem
>
> Kalle Jokiniemi (1):
> OMAP3: PM: SmartReflex driver integration
>
> Kevin Hilman (1):
> temp: SR: IO_ADDRESS conversion
>
> Phil Carmody (2):
> OMAP3: PM: Don't do unnecessary searches in
> omap_sr_vdd*_autocomp_store
> OMAP3: PM: Early exit on invalid parameters
>
> Rajendra Nayak (10):
> OMAP3: SR: Fix init voltage on OPP change
> OMAP3: SR: Update VDD1/2 voltages at boot
> OMAP3: SR: Use sysclk for SR CLKLENGTH calc
> OMAP3: SR: Reset voltage level on SR disable
> OMAP3: SR: Replace printk's with pr_* calls
> OMAP3: SR: Remove redundant defines
> OMAP3: SR: Replace (0x1 << n) with BIT(n)
> OMAP3: SR: Fix SR driver to check for omap-pm return values
> OMAP3: PM: Put optimal SMPS stabilization delay
> OMAP3: SR: Wait for VP idle before a VP disable
>
> Roger Quadros (4):
> OMAP3: PM: Fix Smartreflex when used with PM_NOOP layer
> OMAP3: PM: Make Smartreflex driver independent of SRF
> OMAP3: PM: Do not Enable SmartReflex if OPP tables not defined
> OMAP3: PM: Smartreflex: Fix VDD2 OPP determining logic
>
> Teerth Reddy (1):
> OMAP3: SR: Replace SR_PASS/FAIL,SR_TRUE/FALSE
>
> This patch introduces the following changes in addition to refactoring
> the implementation:
> a) changes the DVFS transition sequences from:
> freq, voltage(SR+vp) and viceversa
> TO:
> disable_vp,SR; freq, voltage(SR+vp) and viceversa; enable_vp,SR
> [NOTE: sequence change for disable path - was sr_dis,vp_dis]
> This change prevents spikes and unexpected voltage changes
> as a result of SR being left enabled at wrong times
> b) Major rewrite of smartreflex.c to do the following:
>
> 1) Support VCbypass style of voltage configuration as optional
> introduce and support forceupdate default as recommended by
> OMAP3430 TRM.
> 2) Centralize operations to allow for simpler and predictable code
> flows
> 3) Modification to SR configured values to be inline with
> silicon characterization results
> 4) cleanup of header
> 5) Introduce a few omap_pmic weak functions which can be overridden
> by platforms implementing PMICs which are different from TWL4030
> derivatives
> 6) srid is standardised to u8 and it is not a bit field
>
> c) Fix ERRCONFIG access to prevent unplanned cleanup of interrupt
> status registers - this is done using a interrupt status mask
> d) Test nvalues removed instead use debugfs entries to set any values
> you like - no more Kconfig option either..
> e) Setup h/w timeout based on cpu sysclk and not hardcoded values
> g) finegrained with raw register values available over
> debugfs in <debugfs mount point>/<pm_debug mount point>/
> smartreflex/{srid}/
> nvalue_opp[1-5] - nvalues for all 5 opps
> following register tweakability:
> VP register values:
> vplimito_value
> vpstepmax_value
> vpstepmin_value
> vpconfig_value
> SR Register values:
> sr_errconfig_value
> sr_config_value
> Advice: disable SR before hitting them, no checks at this point.
>
> test value equivalent userspace bash script would be:
> mount -t debugfs none /dbg
> mount -t sysfs none /sys
> #vdd1:
> #0x00AAB48A - OPP3
> echo -n "11187338" >/dbg/pm_debug/smartreflex/1/nvalue_opp3
> #0x00ABA2E6 - OPP4
> echo -n "11248358" >/dbg/pm_debug/smartreflex/1/nvalue_opp4
> # 0x00AB90D3 - OPP5
> echo -n "11243731" >/dbg/pm_debug/smartreflex/1/nvalue_opp5
>
> #setup senn and senp value (essentially +120)
> x=`cat /dbg/pm_debug/smartreflex/1/sr_config_value`
> y=$((x + 120))
> echo -n $y>/dbg/pm_debug/smartreflex/1/sr_config_value
> #and enable it..
> echo -n "1" >/sys/power/sr_vdd1_autocomp
>
> #vdd2
> #0x00AAC695 -OPP3
> echo -n "11191957" > /dbg/pm_debug/smartreflex/2/nvalue_opp3
> #setup senn and senp value (essentially +120)
> x=`cat /dbg/pm_debug/smartreflex/2/sr_config_value`
> y=$((x + 120))
> echo -n $y>/dbg/pm_debug/smartreflex/2/sr_config_value
> #and enable it..
> echo -n "1" >/sys/power/sr_vdd2_autocomp
>
> Tested on:
> SDP3430 with test N values as above and with ES3.1 silicon
>
> TODO:
> a) Handle scenarios for multiple OMAP variants with differing
> SR capabilities (e.g. varying OPP levels - e.g. 3630, 4430 etc..)
> [IMMEDIATE ISSUE]
> b) Handling OMAP variants with different tuning values
> c) Handling different SR capable PMIC with different tuning values
> d) A proper handling of locking mechanism b/w dvfs and
> userspace access of
> sr[x]_vddautocomp
> e) A more robust error handling
> f) using SR on larger number of boards and any tuning parameters
> which may be needed additionally (HS/FS I2C4 ops etc..)
> g) Wider testing and and bug fixes
> h) Analyse how to use SR decided voltages for OPP1 as
> retention voltage.
> some systems may choose to disable OPP1, what do we do then?
>
> Cc: Rajendra Nayak <rnayak@xxxxxx>
> Cc: Roger Quadros <ext-roger.quadros@xxxxxxxxx>
> Cc: Kalle Jokiniemi <ext-kalle.jokiniemi@xxxxxxxxx>
> Cc: Teerth Reddy <teerth@xxxxxx>
> Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
> Cc: Paul Walmsley <paul@xxxxxxxxx>
> Cc: Högander Jouni <jouni.hogander@xxxxxxxxx>
> Cc: Mike Chan <mikechan@xxxxxxxxxx>
> Signed-off-by: Imberton Guilhem <guilhem.imberton@xxxxxxxxxxxx>
> Signed-off-by: Nishanth Menon <nm@xxxxxx>
> ---
> arch/arm/mach-omap2/pm-debug.c | 3 +
> arch/arm/mach-omap2/resource34xx.c | 8 +-
> arch/arm/mach-omap2/smartreflex.c | 1434
> ++++++++++++++++++++++++++++++++++++
> arch/arm/mach-omap2/smartreflex.h | 274 +++++++
> arch/arm/plat-omap/Kconfig | 15 +-
> 5 files changed, 1723 insertions(+), 11 deletions(-)
> create mode 100644 arch/arm/mach-omap2/smartreflex.c
> create mode 100644 arch/arm/mach-omap2/smartreflex.h
>
> diff --git a/arch/arm/mach-omap2/pm-debug.c
> b/arch/arm/mach-omap2/pm-debug.c
> index 5aac64f..1af5e5f 100644
> --- a/arch/arm/mach-omap2/pm-debug.c
> +++ b/arch/arm/mach-omap2/pm-debug.c
> @@ -35,6 +35,7 @@
> #include "cm.h"
> #include "pm.h"
> #include "prm-regbits-34xx.h"
> +#include "smartreflex.h"
>
> int omap2_pm_debug;
>
> @@ -617,6 +618,8 @@ static int __init pm_dbg_init(void)
> &voltage_off_while_idle,
> &pm_dbg_option_fops);
>
> + (void)sr_debugfs_create_entries(d);
> +
> pm_dbg_init_done = 1;
>
> return 0;
> diff --git a/arch/arm/mach-omap2/resource34xx.c
> b/arch/arm/mach-omap2/resource34xx.c
> index e1a540e..410cb2b 100644
> --- a/arch/arm/mach-omap2/resource34xx.c
> +++ b/arch/arm/mach-omap2/resource34xx.c
> @@ -292,17 +292,23 @@ static int program_opp(int res, struct
> omap_opp *opp, int target_level,
> else
> raise = 0;
>
> +#ifdef CONFIG_OMAP_SMARTREFLEX
> + sr_vp_disable_both(t_opp, c_opp);
> +#endif
> for (i = 0; i < 2; i++) {
> if (i == raise)
> ret = program_opp_freq(res, target_level,
> current_level);
> #ifdef CONFIG_OMAP_SMARTREFLEX
> else
> - sr_voltagescale_vcbypass(t_opp, c_opp,
> + sr_voltage_set(t_opp, c_opp,
> opp[target_level].vsel,
> opp[current_level].vsel);
> #endif
> }
> +#ifdef CONFIG_OMAP_SMARTREFLEX
> + sr_vp_enable_both(t_opp, c_opp);
> +#endif
>
> return ret;
> }
> diff --git a/arch/arm/mach-omap2/smartreflex.c
> b/arch/arm/mach-omap2/smartreflex.c
> new file mode 100644
> index 0000000..b9edfad
> --- /dev/null
> +++ b/arch/arm/mach-omap2/smartreflex.c
> @@ -0,0 +1,1434 @@
> +/*
> + * linux/arch/arm/mach-omap3/smartreflex.c
> + *
> + * OMAP34XX SmartReflex Voltage Control
> + *
> + * Copyright (C) 2009 Texas Instruments, Inc.
> + * Nishanth Menon
> + *
> + * Copyright (C) 2008 Nokia Corporation
> + * Kalle Jokiniemi
> + *
> + * Copyright (C) 2007 Texas Instruments, Inc.
> + * Lesly A M <x0080970@xxxxxx>
> + *
> + * 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/kernel.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/delay.h>
> +#include <linux/err.h>
> +#include <linux/clk.h>
> +#include <linux/sysfs.h>
> +#include <linux/kobject.h>
> +#include <linux/i2c/twl4030.h>
> +#include <linux/io.h>
> +#include <linux/debugfs.h>
> +
> +#include <mach/omap34xx.h>
> +#include <mach/control.h>
> +#include <mach/clock.h>
> +#include <mach/omap-pm.h>
> +#include <mach/resource.h>
> +#include <mach/powerdomain.h>
> +
> +#include "prm.h"
> +#include "smartreflex.h"
> +#include "prm-regbits-34xx.h"
> +
> +/* MCUDISACK is expected to happen within 1uSec. */
> +#define COUNT_TIMEOUT_MCUDISACK 200
> +
> +/* VPINIDLE is expected to happen within 100uSec. Typical is 2uSec */
> +#define COUNT_TIMEOUT_VPINIDLE 200
> +
> +/* Time taken for setting the device - worst case as FS I2C
> + * Depends on SMPSWAITIME MIN/MAX Typical is 200uSec
> + */
> +#define COUNT_TIMEOUT_TRANSDONE_SET 400
> +
> +/* Time to clear out multiple transdone events typical is 3uSec */
> +#define COUNT_TIMEOUT_TRANSDONE_CLR 50
> +
> +/* Time For VCBypass mode for TWL4030 derivative chip. */
> +#define COUNT_TIMEOUT_TWL4030_VCBYPASS 500
> +
> +/* How many retries to do for I2C errors seen on bus for
> Forceupdate? */
> +#define COUNT_RETRY_SMPSNOACK 4
> +
> +#define SR_REGADDR(offset) (sr->srbase_addr + (offset))
> +
> +/* Which function to use for setting voltage */
> +#ifdef CONFIG_OMAP_VC_BYPASS_UPDATE
> +#define SR_CHOSEN_VOLTAGE_UPDATE_MECH sr_vc_bypass
> +#else
> +#define SR_CHOSEN_VOLTAGE_UPDATE_MECH sr_vp_forceupdate
> +#endif
> +
> +/* Structure for Voltage processor */
> +struct omap_sr_vp {
> + /* Store the commonly used register offsets.
> + * this saves a if condition decision
> + */
> + u16 prm_vpx_status_offset;
> + u16 prm_vpx_config_offset;
> + u16 prm_vpx_stepmin_offset;
> + u16 prm_vpx_stepmax_offset;
> + u16 prm_vpx_limito_offset;
> + /* Store the defaults
> + * allowing us to save OCP read
> + * operation
> + */
> + u32 vpconfig_value;
> + u32 vpstepmin_value;
> + u32 vpstepmax_value;
> + u32 vplimito_value;
> + u32 vpenable_mask;
> + u32 irqmask_trans_done;
> + u32 irqmask_smps_noack;
> +};
> +
> +/* Structure for Smart Reflex */
> +struct omap_sr {
> + u8 srid;
> + /* SR activity marker */
> + u8 is_sr_reset;
> + u8 is_autocomp_active;
> + u32 req_opp_no;
> + u32 opp_nvalue[5];
> + u32 sr_config_value;
> + u32 sr_errconfig_value;
> + struct clk *fclk;
> + struct clk *iclk;
> + void __iomem *srbase_addr;
> + /* Lock for maintaining SR+VP programming sequence atomicity */
> + /* Voltage processor for the specific SR module */
> + struct omap_sr_vp vp;
> +};
> +
> +/* Smart Reflex 1 structure */
> +static struct omap_sr sr1 = {
> + /* *INDENT-OFF* */
> + .srid = SR1,
> + .is_sr_reset = 1,
> + .is_autocomp_active = 0,
> + .srbase_addr = (void *)OMAP34XX_SR1_BASE,
> + .vp = {
> + .prm_vpx_status_offset = OMAP3_PRM_VP1_STATUS_OFFSET,
> + .prm_vpx_config_offset = OMAP3_PRM_VP1_CONFIG_OFFSET,
> + .prm_vpx_stepmin_offset = OMAP3_PRM_VP1_VSTEPMIN_OFFSET,
> + .prm_vpx_stepmax_offset = OMAP3_PRM_VP1_VSTEPMAX_OFFSET,
> + .prm_vpx_limito_offset = OMAP3_PRM_VP1_VLIMITTO_OFFSET,
> + .vpconfig_value = PRM_VP1_CONFIG_ERROROFFSET |
> + PRM_VP1_CONFIG_TIMEOUTEN,
> + .vpstepmin_value =
> PRM_VP1_VSTEPMIN_SMPSWAITTIMEMIN |
> + PRM_VP1_VSTEPMIN_VSTEPMIN,
> + .vpstepmax_value =
> PRM_VP1_VSTEPMAX_SMPSWAITTIMEMAX |
> + PRM_VP1_VSTEPMAX_VSTEPMAX,
> + .vplimito_value = PRM_VP1_VLIMITTO_VDDMAX |
> + PRM_VP1_VLIMITTO_VDDMIN,
> + .vpenable_mask = PRM_VP1_CONFIG_VPENABLE,
> + .irqmask_trans_done = VP1_IRQMASK_TRANSDONE,
> + .irqmask_smps_noack = OMAP3430_VP1_NOSMPSACK_ST,
> + },
> + /* *INDENT-ON* */
> +};
> +
> +/* Smart Reflex 2 structure */
> +static struct omap_sr sr2 = {
> + /* *INDENT-OFF* */
> + .srid = SR2,
> + .is_sr_reset = 1,
> + .is_autocomp_active = 0,
> + .srbase_addr = (void *)OMAP34XX_SR2_BASE,
> + .vp = {
> + .prm_vpx_status_offset = OMAP3_PRM_VP2_STATUS_OFFSET,
> + .prm_vpx_config_offset = OMAP3_PRM_VP2_CONFIG_OFFSET,
> + .prm_vpx_stepmin_offset = OMAP3_PRM_VP2_VSTEPMIN_OFFSET,
> + .prm_vpx_stepmax_offset = OMAP3_PRM_VP2_VSTEPMAX_OFFSET,
> + .prm_vpx_limito_offset = OMAP3_PRM_VP2_VLIMITTO_OFFSET,
> + .vpconfig_value = PRM_VP2_CONFIG_ERROROFFSET |
> + PRM_VP2_CONFIG_TIMEOUTEN,
> + .vpstepmin_value =
> PRM_VP2_VSTEPMIN_SMPSWAITTIMEMIN |
> + PRM_VP2_VSTEPMIN_VSTEPMIN,
> + .vpstepmax_value =
> PRM_VP2_VSTEPMAX_SMPSWAITTIMEMAX |
> + PRM_VP2_VSTEPMAX_VSTEPMAX,
> + .vplimito_value = PRM_VP2_VLIMITTO_VDDMAX |
> + PRM_VP2_VLIMITTO_VDDMIN,
> + .vpenable_mask = PRM_VP2_CONFIG_VPENABLE,
> + .irqmask_trans_done = VP2_IRQMASK_TRANSDONE,
> + .irqmask_smps_noack = OMAP3430_VP1_NOSMPSACK_ST,
> + },
> + /* *INDENT-ON* */
> +};
> +
> +/****************** SMART REFLEX DEBUGFS ENTRIES
> *************************/
> +
> +#ifdef __SR_DEBUG
> +
> +/**
> + * @brief sr_debugfs_set - set variable with value
> + *
> + * @param data - variable pointer
> + * @param val - value to set
> + *
> + * @return - 0
> + */
> +static int sr_debugfs_set(void *data, u64 val)
> +{
> + u32 *option = data;
> +
> + *option = val;
> +
> + return 0;
> +}
> +
> +/**
> + * @brief sr_debugfs_get - setup the params
> + *
> + * @param data - variable to set
> + * @param val - value to return
> + *
> + * @return - 0
> + */
> +static int sr_debugfs_get(void *data, u64 * val)
> +{
> + u32 *option = data;
> +
> + *val = *option;
> +
> + return 0;
> +}
> +
> +DEFINE_SIMPLE_ATTRIBUTE(sr_debugfs_option_fops,
> sr_debugfs_get, sr_debugfs_set,
> + "%llu\n");
> +
> +/**
> + * @brief sr_debugfs_create_entries - create the Smart
> Reflex entries - called
> + * from pm-debug
> + *
> + * @param d - parent directory tree
> + *
> + * @return 0 if all ok, else returns with error
> + */
> +int sr_debugfs_create_entries(struct dentry *d)
> +{
> + struct dentry *sr_dir;
> + struct dentry *sr_sub_dir;
> + struct omap_sr *sr_list[] = { &sr1, &sr2 };
> + int count;
> +
> + sr_dir = debugfs_create_dir("smartreflex", d);
> + if (IS_ERR(sr_dir))
> + return PTR_ERR(sr_dir);
> + for (count = 0; count < (sizeof(sr_list) /
> sizeof(struct omap_sr *));
> + count++) {
> + struct omap_sr *sr = sr_list[count];
> + char name[2] = "0";
> + name[0] += sr->srid;
> + sr_sub_dir = debugfs_create_dir(name, sr_dir);
> + if (IS_ERR(sr_sub_dir))
> + continue;
> +
> + (void)debugfs_create_file("nvalue_opp1",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->opp_nvalue[0]),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("nvalue_opp2",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->opp_nvalue[1]),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("nvalue_opp3",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->opp_nvalue[2]),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("nvalue_opp4",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->opp_nvalue[3]),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("nvalue_opp5",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->opp_nvalue[4]),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("sr_errconfig_value",
> + S_IRUGO | S_IWUGO, sr_sub_dir,
> + &(sr->sr_errconfig_value),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("sr_config_value",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->sr_config_value),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("vpconfig_value",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->vp.vpconfig_value),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("vpstepmin_value",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->vp.vpstepmin_value),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("vpstepmax_value",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->vp.vpstepmax_value),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("vplimito_value",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->vp.vplimito_value),
> + &sr_debugfs_option_fops);
> + (void)debugfs_create_file("vplimito_value",
> S_IRUGO | S_IWUGO,
> + sr_sub_dir,
> &(sr->vp.vplimito_value),
> + &sr_debugfs_option_fops);
> + }
> +
> + return 0;
> +}
> +
> +#endif /* __SR_DEBUG */
> +
> +/****************** PMIC WEAK FUNCTIONS FOR TWL4030
> derivatives **********/
> +
> +/**
> + * @brief pmic_srinit - Power management IC initialization
> + * for smart reflex. The current code is written for TWL4030
> + * derivatives, replace in board file if PMIC requires
> + * a different sequence
> + *
> + * @return result of operation
> + */
> +int __weak __init omap_pmic_srinit(void)
> +{
> + int ret = -ENODEV;
> +#ifdef CONFIG_TWL4030_CORE
> + u8 reg;
> + /* Enable SR on T2 */
> + ret = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, ®,
> + R_DCDC_GLOBAL_CFG);
> +
> + reg |= DCDC_GLOBAL_CFG_ENABLE_SRFLX;
> + ret |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, reg,
> + R_DCDC_GLOBAL_CFG);
> +#endif /* End of CONFIG_TWL4030_CORE */
> + return ret;
> +}
> +
> +/**
> + * @brief omap_pmic_voltage_ramp_delay - how much should
> this pmic ramp delay
> + * Various PMICs have different ramp up and down delays.
> choose to implement
> + * in required pmic file to override this function.
> + * On TWL4030 derivatives:
> + * T2 SMPS slew rate (min) 4mV/uS, step size 12.5mV,
> + * 2us added as buffer.
> + *
> + * @param srid - which SR is this for?
> + * @param target_vsel - targetted voltage selction
> + * @param current_vsel - current voltage selection
> + *
> + * @return delay in uSeconds
> + */
> +u32 __weak omap_pmic_voltage_ramp_delay(u8 srid, u8 target_vsel,
> + u8 current_vsel)
> +{
> + u32 t2_smps_steps = abs(target_vsel - current_vsel);
> + u32 t2_smps_delay = ((t2_smps_steps * 125) / 40) + 2;
> + return t2_smps_delay;
> +}
> +
> +#ifdef CONFIG_OMAP_VC_BYPASS_UPDATE
> +/**
> + * @brief omap_pmic_voltage_cmds - hook for pmic command sequence
> + * to be send out which are specific to pmic to set a
> specific voltage.
> + * this should inturn call vc_send_command with the required sequence
> + * The current implementation is for TWL4030 derivatives
> + *
> + * @param srid - which SR is this for?
> + * @param target_vsel - what voltage is desired to be set?
> + *
> + * @return specific value to set.
> + */
> +int __weak omap_pmic_voltage_cmds(u8 srid, u8 target_vsel)
> +{
> + u8 reg_addr = (srid == SR1) ? R_VDD1_SR_CONTROL :
> R_VDD2_SR_CONTROL;
> + u16 timeout = COUNT_TIMEOUT_TWL4030_VCBYPASS;
> + return vc_send_command(R_SRI2C_SLAVE_ADDR, reg_addr,
> target_vsel,
> + &timeout);
> +}
> +#endif /* ifdef
> CONFIG_OMAP_VC_BYPASS_UPDATE */
> +
> +/*********************** Voltage Controller functions
> *************************/
> +
> +/**
> + * @brief vc_send_command - The actual command transmission using
> + * Voltage controller on I2C4
> + *
> + * @param slave_addr - what is the PMIC slave address
> + * @param reg_addr - what is the register address I should be using?
> + * @param data - what value do you want to write here?
> + * @param timeout_us timeout in uSeconds - returns actual time left
> + *
> + * @return 0 if all ok, else error value
> + */
> +int vc_send_command(u8 slave_addr, u8 reg_addr, u8 data, u16
> *timeout_us)
> +{
> + u32 value;
> + u32 count;
> +
> + if (unlikely(!timeout_us))
> + return -EINVAL;
> +
> + /* timeout = timeout_us/10 -> each udelay event
> + * 1 udelay event every 50 iteration, assuming
> + * each iteration is instaneous,
> + * count = (timeout_us/10) * 50 or timeout_us * 5
> + */
> + count = *timeout_us * 5;
> +
> + value = (data << OMAP3430_DATA_SHIFT) |
> + (reg_addr << OMAP3430_REGADDR_SHIFT) |
> + (slave_addr << OMAP3430_SLAVEADDR_SHIFT);
> +
> + prm_write_mod_reg(value, OMAP3430_GR_MOD,
> + OMAP3_PRM_VC_BYPASS_VAL_OFFSET);
> +
> + value = prm_set_mod_reg_bits(OMAP3430_VALID, OMAP3430_GR_MOD,
> + OMAP3_PRM_VC_BYPASS_VAL_OFFSET);
> + /*
> + * Do continous 50 checks then follow with a 10usec delay,
> + * then check again
> + */
> + do {
> + value = prm_read_mod_reg(OMAP3430_GR_MOD,
> + OMAP3_PRM_VC_BYPASS_VAL_OFFSET)
> + & OMAP3430_VALID;
> + /* should i wait? */
> + if (value && (count % 50))
> + udelay(10);
> + count--;
> + *timeout_us -= 5;
> + } while (value && count);
> + if (!count) {
> + pr_err("VC:Command Timedout! slave_addr=0x%02X,"
> + "reg=0x%02X, value=0x%02X", slave_addr,
> reg_addr, data);
> + return -ETIMEDOUT;
> + }
> + return 0;
> +}
> +EXPORT_SYMBOL(vc_send_command);
> +
> +/**
> + * @brief sr_vc_bypass - setup voltage using VC Bypass technique
> + *
> + * @param target_opp - target opp to go to
> + * @param current_opp - current opp
> + * @param target_vsel - which voltage to go to?
> + * @param current_vsel - current voltage
> + *
> + * @return -success or failure
> + */
> +#ifdef CONFIG_OMAP_VC_BYPASS_UPDATE
> +static int sr_vc_bypass(struct omap_sr *sr,
> + u32 target_opp_no, u8 target_vsel, u8
> current_vsel)
> +{
> + int ret = 0;
> + struct omap_sr_vp *vp = &sr->vp;
> + u32 vc_cmd_val_offs;
> + u32 vpconfig_value;
> +
> + vc_cmd_val_offs =
> + (sr->srid ==
> + SR1) ? OMAP3_PRM_VC_CMD_VAL_0_OFFSET :
> + OMAP3_PRM_VC_CMD_VAL_1_OFFSET;
> +
> + vpconfig_value = vp->vpconfig_value;
> + vpconfig_value |= ((target_opp_no < 3) ? SR_ERRGAIN_LOWOP :
> + SR_ERRGAIN_HIGHOPP) <<
> OMAP3430_ERRORGAIN_SHIFT;
> + vpconfig_value |= target_vsel << OMAP3430_INITVOLTAGE_SHIFT;
> + prm_write_mod_reg(vpconfig_value, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> +
> + prm_rmw_mod_reg_bits(OMAP3430_VC_CMD_ON_MASK,
> + (target_vsel << OMAP3430_VC_CMD_ON_SHIFT),
> + OMAP3430_GR_MOD, vc_cmd_val_offs);
> +
> + /*
> + * Various PMIC might need a set of commands
> + * provide hooks for specific PMICs to implement
> + */
> + ret = omap_pmic_voltage_cmds(sr->srid, target_vsel);
> +
> + /* delay based on pmic */
> + if (!ret)
> + udelay(omap_pmic_voltage_ramp_delay(sr->srid,
> +
> target_vsel, current_vsel));
> +
> + WARN_ON(ret);
> +
> + return ret;
> +}
> +#endif /* ifdef
> CONFIG_OMAP_VC_BYPASS_UPDATE */
> +
> +/********************* SR Private functions
> ***************************/
> +
> +/**
> + * @brief sr_write_reg - write to Smart Reflex Register
> + *
> + * @param sr - pointer to SR structure
> + * @param offset - SR reg offset to write to
> + * @param value - value to write with
> + */
> +static inline void sr_write_reg(struct omap_sr *sr, unsigned
> offset, u32 value)
> +{
> + __raw_writel(value, SR_REGADDR(offset));
> +}
> +
> +/**
> + * @brief sr_modify_reg - Modify a register and write a new
> value to a field
> + *
> + * @param sr -pointer to SR structure
> + * @param offset -register offset
> + * @param mask -mask to clear out
> + * @param value -value to write there
> + */
> +static inline void sr_modify_reg(struct omap_sr *sr,
> unsigned offset, u32 mask,
> + u32 value)
> +{
> + u32 reg_val;
> +
> + reg_val = __raw_readl(SR_REGADDR(offset));
> + reg_val &= ~mask;
> + reg_val |= value;
> +
> + __raw_writel(reg_val, SR_REGADDR(offset));
> +}
> +
> +/**
> + * @brief sr_read_reg - read a SR register
> + *
> + * @param sr - pointer to SR structure
> + * @param offset - register offset
> + *
> + * @return value in that register
> + */
> +static inline u32 sr_read_reg(struct omap_sr *sr, unsigned offset)
> +{
> + return __raw_readl(SR_REGADDR(offset));
> +}
> +
> +/**
> + * @brief sr_vplimito_value -return the timeout value based on sysclk
> + * and desired timeout uSec
> + *
> + * @param sys_clk_speed - internal sysclk freq in hz
> + * @param timeout_us - timeout in uSec
> + *
> + * @return timeout value to use in VPLIMITTO:TIMEOUT reg
> + */
> +static inline u32 sr_vplimito_value(u32 sys_clk_speed, u16
> timeout_us)
> +{
> + u32 timeout_val;
> + /* prevent round off errors, we will divide by 10 later */
> + timeout_val = (sys_clk_speed / 100000);
> + timeout_val *= timeout_us;
> + timeout_val /= 10;
> + return timeout_val;
> +}
> +
> +/**
> + * @brief sr_clk_enable - SR clock enable
> + *
> + * @param sr - Structure to SR structure
> + *
> + * @return - result
> + */
> +static int sr_clk_enable(struct omap_sr *sr)
> +{
> + if (clk_enable(sr->iclk) != 0) {
> + pr_crit("SR:Could not enable %s for [%d]\n",
> + sr->iclk->name, sr->srid);
> + return -EINVAL;
> + }
> + if (clk_enable(sr->fclk) != 0) {
> + pr_crit("SR:Could not enable %s for [%d]\n",
> + sr->fclk->name, sr->srid);
> + clk_disable(sr->iclk);
> + return -EINVAL;
> + }
> + sr_modify_reg(sr, ERRCONFIG,
> + SR_CLKACTIVITY_MASK |
> ERRCONFIG_INTERRUPT_STATUS_MASK,
> + SR_CLKACTIVITY_IOFF_FON);
> + sr->is_sr_reset = 0;
> +
> + return 0;
> +}
> +
> +/**
> + * @brief sr_clk_disable - SR func clock disable
> + *
> + * @param sr - pointer to SR structure
> + */
> +static void sr_clk_disable(struct omap_sr *sr)
> +{
> + /* set fclk, iclk- idle */
> + sr_modify_reg(sr, ERRCONFIG,
> + SR_CLKACTIVITY_MASK |
> ERRCONFIG_INTERRUPT_STATUS_MASK,
> + SR_CLKACTIVITY_IOFF_FOFF);
> +
> + clk_disable(sr->fclk);
> + clk_disable(sr->iclk);
> + sr->is_sr_reset = 1;
> +}
> +
> +/****************** Voltage processor functions
> ***************************/
> +
> +/**
> + * @brief sr_vp_clear_vptransdone - clear vptrans_done event
> + *
> + * @param sr - sr pointer
> + *
> + * @return 0 if cleared ok, else 1 if timedout!
> + */
> +static int sr_vp_clear_vptransdone(struct omap_sr *sr)
> +{
> + struct omap_sr_vp *vp = &sr->vp;
> + u32 irqstat;
> + u32 count = COUNT_TIMEOUT_TRANSDONE_CLR;
> + do {
> + prm_write_mod_reg(vp->irqmask_trans_done, OCP_MOD,
> + OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
> + irqstat = prm_read_mod_reg(OCP_MOD,
> +
> OMAP3_PRM_IRQSTATUS_MPU_OFFSET) &
> + vp->irqmask_trans_done;
> + if (irqstat)
> + udelay(1);
> + count--;
> + } while (count && irqstat);
> + if (!count) {
> + pr_crit("SR:VPTransdone[%d]:Timedout\n", sr->srid);
> + return -ETIMEDOUT;
> + }
> + return 0;
> +}
> +
> +/**
> + * @brief sr_vp_forceupdate - do a forceupdate method
> + * to update the voltage level
> + *
> + * @param sr - pointer to sr structure
> + * @param target_opp_no - targetted opp number
> + * @param target_vsel - targetted voltage level
> + * @param current_vsel - current voltage level
> + *
> + * @return 0 if all worked out, else 1
> + */
> +#ifndef CONFIG_OMAP_VC_BYPASS_UPDATE
> +static int sr_vp_forceupdate(struct omap_sr *sr, u32 target_opp_no,
> + u8 target_vsel, u8 current_vsel)
> +{
> + u32 count;
> + u32 irqstat;
> + u32 vpconfig_value;
> + u32 retry_counter = COUNT_RETRY_SMPSNOACK;
> +
> + struct omap_sr_vp *vp = &sr->vp;
> +
> +retry_forceupdate:
> + /* First clear any pending events in the system */
> + if (sr_vp_clear_vptransdone(sr)) {
> +
> pr_crit("SR:forceupdate-transdone1[%d]:timedout\n", sr->srid);
> + return -ETIMEDOUT;
> + }
> +
> + vpconfig_value = vp->vpconfig_value;
> + vpconfig_value |= ((target_opp_no < 3) ? SR_ERRGAIN_LOWOP :
> + SR_ERRGAIN_HIGHOPP) <<
> OMAP3430_ERRORGAIN_SHIFT;
> + vpconfig_value |= target_vsel << OMAP3430_INITVOLTAGE_SHIFT;
> +
> + prm_write_mod_reg(vpconfig_value, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> +
> + /* Trigger initVDD value copy to voltage processor */
> + prm_set_mod_reg_bits(OMAP3430_INITVDD, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> +
> + /* Force update of voltage */
> + prm_set_mod_reg_bits(OMAP3430_FORCEUPDATE, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> +
> + /* Clear initVDD copy trigger bit */
> + prm_clear_mod_reg_bits(OMAP3430_INITVDD, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> + /* Clear force bit */
> + prm_clear_mod_reg_bits(OMAP3430_FORCEUPDATE, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> +
> + /* Now wait for the i2c transactions to complete */
> + count = COUNT_TIMEOUT_TRANSDONE_SET;
> + irqstat = 0;
> + do {
> + irqstat = prm_read_mod_reg(OCP_MOD,
> +
> OMAP3_PRM_IRQSTATUS_MPU_OFFSET) &
> + vp->irqmask_trans_done;
> + if (!irqstat)
> + udelay(1);
> + count--;
> + } while (count && !irqstat);
> + if (!count) {
> + irqstat = prm_read_mod_reg(OCP_MOD,
> +
> OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
> + if (irqstat & vp->irqmask_smps_noack) {
> + WARN(irqstat, "SMPS NO ACK DETECTED[0x%08X]!!"
> + "ATTEMPTING RECOVERY [%d left]\n",
> + irqstat, retry_counter);
> + prm_write_mod_reg(irqstat, OCP_MOD,
> +
> OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
> + retry_counter--;
> + if (retry_counter)
> + goto retry_forceupdate;
> + }
> + pr_crit("SR:forceupdate-transdone[%d]:timedout-"
> + "irqstat=0x%08X\n", sr->srid, irqstat);
> + BUG();
> + return -ETIMEDOUT;
> + }
> +
> + /*
> + * Now we wait for voltage to rise on PMIC
> + */
> + udelay(omap_pmic_voltage_ramp_delay(sr->srid, target_vsel,
> + current_vsel));
> +
> + /* clear that event */
> + if (sr_vp_clear_vptransdone(sr)) {
> +
> pr_crit("SR:forceupdate-transdone2[%d]:timedout\n", sr->srid);
> + BUG();
> + return -ETIMEDOUT;
> + }
> + return 0;
> +}
> +#endif /* ifndef
> CONFIG_OMAP_VC_BYPASS_UPDATE */
> +
> +/**
> + * @brief sr_vp_enable - enable VP enable code
> + *
> + * @param sr
> + */
> +static int sr_vp_enable(struct omap_sr *sr, u32 target_opp_no)
> +{
> + u32 vpconfig_value;
> + struct omap_sr_vp *vp = &sr->vp;
> +
> + /* Disable VP */
> + prm_clear_mod_reg_bits(vp->vpenable_mask, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> + /* Clear INITVDD */
> + prm_clear_mod_reg_bits(OMAP3430_INITVDD, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> +
> + vpconfig_value = vp->vpconfig_value;
> + vpconfig_value |= ((sr->srid == SR1) ?
> mpu_opps[target_opp_no].vsel :
> + l3_opps[target_opp_no].vsel) <<
> + OMAP3430_INITVOLTAGE_SHIFT;
> + vpconfig_value |=
> + ((target_opp_no < 3) ? SR_ERRGAIN_LOWOP :
> SR_ERRGAIN_HIGHOPP) <<
> + OMAP3430_ERRORGAIN_SHIFT;
> +
> + prm_write_mod_reg(vpconfig_value, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> +
> + prm_write_mod_reg(vp->vpstepmin_value, OMAP3430_GR_MOD,
> + vp->prm_vpx_stepmin_offset);
> + prm_write_mod_reg(vp->vpstepmax_value, OMAP3430_GR_MOD,
> + vp->prm_vpx_stepmax_offset);
> + prm_write_mod_reg(vp->vplimito_value, OMAP3430_GR_MOD,
> + vp->prm_vpx_limito_offset);
> +
> + /* write1 to latch */
> + prm_set_mod_reg_bits(OMAP3430_INITVDD, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> + /* write2 clear */
> + prm_clear_mod_reg_bits(OMAP3430_INITVDD, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> + /* Enable VP */
> + prm_set_mod_reg_bits(vp->vpenable_mask, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> + return 0;
> +}
> +
> +/**
> + * @brief sr_vp_disable - disbale Voltage processor
> + *
> + * @param sr - sr structure
> + *
> + * @return 0 if all ok, else return -ETIMEDOUT
> + */
> +static int sr_vp_disable(struct omap_sr *sr)
> +{
> + int count;
> + u32 v;
> + struct omap_sr_vp *vp = &sr->vp;
> +
> + v = prm_read_mod_reg(OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset) &
> vp->vpenable_mask;
> + /* Am i already disabled? */
> + if (!v) {
> + pr_info("SR[%d] attempt to disable VP when
> already disabled!\n",
> + sr->srid);
> + return 0;
> + }
> +
> + /* Disable VP */
> + prm_clear_mod_reg_bits(vp->vpenable_mask, OMAP3430_GR_MOD,
> + vp->prm_vpx_config_offset);
> +
> + /* Wait for vp to get idle - clear any events pending */
> + count = COUNT_TIMEOUT_MCUDISACK;
> + do {
> + v = prm_read_mod_reg(OMAP3430_GR_MOD,
> + vp->prm_vpx_status_offset) &
> + PRM_VP_STATUS_VPINIDLE;
> + if (!v)
> + udelay(1);
> + count--;
> + } while (count && !v);
> + if (unlikely(!count)) {
> + v = prm_read_mod_reg(OCP_MOD,
> OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
> + pr_warning("SR:vpdisable-vpinidle[%d][opp=%d]:timedout-"
> + "irqstat=0x%08X\n", sr->srid,
> sr->req_opp_no, v);
> + return -ETIMEDOUT;
> + }
> + return 0;
> +}
> +
> +/**
> + * @brief sr_vp_configure - configure the basic SR structure
> + *
> + * @param sr - pointer to SR structure
> + */
> +static void sr_vp_configure(struct omap_sr *sr)
> +{
> + u32 target_opp_no;
> + u32 target_vsel;
> + u32 prm_vpx_voltage;
> +
> + if (sr->srid == SR1) {
> + target_opp_no =
> mpu_opps[resource_get_level("vdd1_opp")].opp_id;
> + target_vsel =
> mpu_opps[resource_get_level("vdd1_opp")].vsel;
> + prm_vpx_voltage = prm_read_mod_reg(OMAP3430_GR_MOD,
> +
> OMAP3_PRM_VP1_VOLTAGE_OFFSET);
> + } else {
> + target_opp_no =
> l3_opps[resource_get_level("vdd2_opp")].opp_id;
> + target_vsel =
> l3_opps[resource_get_level("vdd2_opp")].vsel;
> + prm_vpx_voltage = prm_read_mod_reg(OMAP3430_GR_MOD,
> +
> OMAP3_PRM_VP2_VOLTAGE_OFFSET);
> + }
> +
> + sr_vp_enable(sr, target_opp_no);
> + if (SR_CHOSEN_VOLTAGE_UPDATE_MECH
> + (sr, target_opp_no, target_vsel, prm_vpx_voltage))
> + pr_crit("SR[%d] CONFIGURE VP failed!!\n", sr->srid);
> +}
> +
> +/**
> + * @brief sr_vp_reset_voltage - reset the voltages back to
> DVFS values
> + *
> + * @param srid -SRID
> + *
> + * @return 0 if ok, else result
> + */
> +static int sr_vp_reset_voltage(u8 srid)
> +{
> + u32 target_opp_no;
> + u32 target_vsel;
> + u32 prm_vpx_voltage;
> + struct omap_sr *sr;
> + if (srid == SR1) {
> + sr = &sr1;
> + target_opp_no = sr1.req_opp_no;
> + target_vsel = mpu_opps[target_opp_no].vsel;
> + prm_vpx_voltage = prm_read_mod_reg(OMAP3430_GR_MOD,
> +
> OMAP3_PRM_VP1_VOLTAGE_OFFSET);
> + } else {
> + sr = &sr2;
> + target_opp_no = sr2.req_opp_no;
> + target_vsel = l3_opps[target_opp_no].vsel;
> + prm_vpx_voltage = prm_read_mod_reg(OMAP3430_GR_MOD,
> +
> OMAP3_PRM_VP2_VOLTAGE_OFFSET);
> + }
> + return SR_CHOSEN_VOLTAGE_UPDATE_MECH(sr, target_opp_no,
> + target_vsel,
> prm_vpx_voltage);
> +
> +}
> +
> +/*********************** SR functions *************************/
> +
> +/**
> + * @brief sr_enable - enable smart reflex
> + *
> + * @param sr - smartreflex structure we are interest
> + * @param target_opp_no - target opp we want to switch to
> + *
> + * @return 0 if all went right, else return err val
> + */
> +static int sr_enable(struct omap_sr *sr, u32 target_opp_no)
> +{
> + u32 value;
> +
> + if (!sr->is_sr_reset) {
> + pr_info("SR[%d]already enabled\n", sr->srid);
> + return -EINVAL;
> + }
> +
> + sr->req_opp_no = target_opp_no;
> +
> + value = sr->opp_nvalue[target_opp_no - 1];
> + if (value == 0) {
> + pr_info("SR[%d]:OPP%d doesn't support SmartReflex\n",
> + sr->srid, target_opp_no);
> + return -EINVAL;
> + }
> +
> + sr_clk_enable(sr);
> + /* Start with setting SREnable as 0 */
> + sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0);
> +
> + sr_write_reg(sr, SRCONFIG, sr->sr_config_value);
> +
> + sr_write_reg(sr, NVALUERECIPROCAL, value);
> +
> + value = sr->sr_errconfig_value |
> + ((target_opp_no < 3) ? SR_ERRMINLIMIT_LOWOPP :
> + SR_ERRMINLIMIT_HIGHOPP);
> +
> + sr_write_reg(sr, ERRCONFIG, value);
> +
> + /* SRCONFIG - enable SR */
> + sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE,
> SRCONFIG_SRENABLE);
> +
> + return 0;
> +}
> +
> +/**
> + * @brief sr_disable - disable Smart Reflex
> + *
> + * @param sr - pointer to sr structure of interest
> + *
> + * @return 0 if all went right, else return INVAL/TIMEDOUT
> + */
> +int sr_disable(struct omap_sr *sr)
> +{
> + int count;
> + u32 stat;
> + u32 value;
> +
> + if (sr->is_sr_reset) {
> + pr_info("SR[%d]-disable:already Disabled\n", sr->srid);
> + return -EINVAL;
> + }
> + value = sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE;
> + if (!value) {
> + pr_info("SR[%d] attempt to disable SR when
> already disabled!\n",
> + sr->srid);
> + return 0;
> + }
> + value = sr->opp_nvalue[sr->req_opp_no - 1];
> + if (value == 0) {
> + pr_info("SR[%d]-disable:"
> + "OPP%d doesn't support SmartReflex\n",
> + sr->srid, sr->req_opp_no);
> + return -EINVAL;
> + }
> + /* Enable the MCUDISACKINST */
> + sr_modify_reg(sr, ERRCONFIG, ERRCONFIG_MCUDISACKINTEN |
> + ERRCONFIG_INTERRUPT_STATUS_MASK,
> + ERRCONFIG_MCUDISACKINTEN);
> +
> + /* SRCONFIG - disable SR */
> + sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0);
> +
> + /* Disable VPBOUND interrupt and clear any status
> + * before actually waiting for disack
> + * should be done after sr is disabled
> + */
> + sr_modify_reg(sr, ERRCONFIG, ERRCONFIG_VPBOUNDINTEN |
> + ERRCONFIG_INTERRUPT_STATUS_MASK,
> ERRCONFIG_VPBOUNDINTST);
> +
> + /* Wait for MCUDISACKINTST to be set */
> + count = COUNT_TIMEOUT_MCUDISACK;
> + do {
> + stat = sr_read_reg(sr, ERRCONFIG) &
> ERRCONFIG_MCUDISACKINTST;
> + if (!stat)
> + udelay(1);
> + count--;
> + } while (count && !stat);
> + /* Clear the event and disable MCUDISACKINST */
> + sr_modify_reg(sr, ERRCONFIG, ERRCONFIG_MCUDISACKINTEN |
> + ERRCONFIG_INTERRUPT_STATUS_MASK,
> + ERRCONFIG_MCUDISACKINTST);
> +
> + if (!count) {
> + pr_crit("SR[%d]-disable:MCUDIS timedout\n", sr->srid);
> + return -ETIMEDOUT;
> + }
> + sr_clk_disable(sr);
> + return 0;
> +}
> +
> +/**************** Common enable/disable functionality
> *********************/
> +
> +/**
> + * @brief srvp_disable - disable SR and VP
> + * These functions are based on h/w timeouts and should
> ideally not fail.
> + *
> + * @param sr -sr struct
> + *
> + * @return result
> + */
> +static int srvp_disable(struct omap_sr *sr)
> +{
> + int ret;
> + /* If we dont have an nvalue, dont bother.. */
> + if (!sr->opp_nvalue[sr->req_opp_no - 1]) {
> + pr_warning("SR[%d]: OPP%d does not support SR
> to disable\n",
> + sr->srid, sr->req_opp_no);
> + return -EINVAL;
> + }
> + ret = sr_vp_disable(sr);
> + if (unlikely(ret)) {
> + pr_err("SR[%d]: failed to disable vp:%d\n",
> sr->srid, ret);
> + } else {
> + ret = sr_disable(sr);
> + if (unlikely(ret))
> + pr_err("SR[%d]: failed to disable sr:%d\n",
> + sr->srid, ret);
> + }
> + /*
> + * Does not make much sense renabling SR as
> + * system is going to be in an invalid state
> + */
> + WARN_ON(ret);
> + return ret;
> +}
> +
> +/**
> + * @brief srvp_enable - enable SR and VP
> + * These functions are based on h/w timeouts and should
> ideally not fail.
> + *
> + * @param sr -sr struct
> + * @param target_opp -opp to go to
> + *
> + * @return result
> + */
> +static int srvp_enable(struct omap_sr *sr, u32 target_opp)
> +{
> + int ret;
> + /* If we dont have an nvalue, dont bother.. */
> + if (!sr->opp_nvalue[target_opp - 1]) {
> + pr_warning("SR[%d]: OPP%d does not support SR
> to enable\n",
> + sr->srid, target_opp);
> + return -EINVAL;
> + }
> + ret = sr_vp_enable(sr, target_opp);
> + if (unlikely(ret)) {
> + pr_err("SR[%d]: failed to enable vp:%d\n",
> sr->srid, ret);
> + } else {
> + ret = sr_enable(sr, target_opp);
> + /* Attempt to recover */
> + if (unlikely(ret)) {
> + pr_err("SR[%d]: failed to enable
> sr:%d\n", sr->srid,
> + ret);
> + /* nothing we can do if vp_disable fails */
> + (void)sr_vp_disable(sr);
> + }
> + }
> + /*
> + * potentially system in an invalid state - warn..
> + */
> + WARN_ON(ret);
> + return ret;
> +}
> +
> +/*********************** DVFS Entry POINTS
> **********************************/
> +
> +/**
> + * @brief sr_vp_enable_both - enable both vp and sr
> + *
> + * @param target_opp - targetted op
> + * @param current_opp - current opp
> + *
> + * @return 0 if ok, 1 if not ok
> + */
> +int sr_vp_enable_both(u32 target_opp, u32 current_opp)
> +{
> + struct omap_sr *sr;
> + u32 vdd, target_opp_no;
> + int ret = 0;
> +
> + vdd = get_vdd(target_opp);
> + target_opp_no = get_opp_no(target_opp);
> + sr = (vdd == PRCM_VDD1) ? &sr1 : &sr2;
> +
> + if (sr->is_autocomp_active && sr->is_sr_reset) {
> + ret = srvp_enable(sr, target_opp_no);
> + if (ret) {
> + pr_err("SR[%d]:enableboth:"
> + "failed enable SR\n", sr->srid);
> + }
> + }
> + return 0;
> +}
> +EXPORT_SYMBOL(sr_vp_enable_both);
> +
> +/**
> + * @brief sr_vp_disable_both - disable both vp and sr
> + *
> + * @param target_opp - targetted opp
> + * @param current_opp - current opp
> + *
> + * @return 0 if ok, 1 if not ok
> + */
> +int sr_vp_disable_both(u32 target_opp, u32 current_opp)
> +{
> + struct omap_sr *sr;
> + u32 vdd;
> + int ret = 0;
> +
> + vdd = get_vdd(target_opp);
> + sr = (vdd == PRCM_VDD1) ? &sr1 : &sr2;
> +
> + if (sr->is_autocomp_active && !sr->is_sr_reset) {
> + ret = srvp_disable(sr);
> + if (ret) {
> + pr_err("SR[%d]:disableboth:"
> + "failed disable SR\n", sr->srid);
> + }
> + }
> +
> + return 0;
> +
> +}
> +EXPORT_SYMBOL(sr_vp_disable_both);
> +
> +/**
> + * @brief sr_voltage_set - setup a voltage requested
> + *
> + * @param target_opp - targetted opp
> + * @param current_opp - current opp
> + * @param target_vsel - targeted voltage
> + * @param current_vsel - current voltage
> + *
> + * @return - result of op -0 if ok, else value
> + */
> +int sr_voltage_set(u32 target_opp, u32 current_opp,
> + u8 target_vsel, u8 current_vsel)
> +{
> + struct omap_sr *sr;
> + u32 vdd, target_opp_no;
> + int ret;
> +
> + vdd = get_vdd(target_opp);
> + target_opp_no = get_opp_no(target_opp);
> + sr = (vdd == PRCM_VDD1) ? &sr1 : &sr2;
> +
> + ret =
> + SR_CHOSEN_VOLTAGE_UPDATE_MECH(sr, target_opp_no,
> target_vsel,
> + current_vsel);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL(sr_voltage_set);
> +
> +/*********************** CPUIDLE ENTRY POINTS
> *********************************/
> +
> +/**
> + * @brief disable_smartreflex - disable SmartReflex before WFI
> + *
> + * @param srid SRID
> + */
> +void disable_smartreflex(u8 srid)
> +{
> + struct omap_sr *sr = NULL;
> + int ret;
> + u32 current_opp_no;
> +
> + /* I want to be in irq_disabled context..
> + * else I will die.. find the rootcause and fix it instead
> + */
> + BUG_ON(!irqs_disabled());
> +
> + sr = (srid == SR1) ? &sr1 : &sr2;
> +
> + current_opp_no = (sr->srid == SR1) ?
> + mpu_opps[resource_get_level("vdd1_opp")].opp_id :
> + l3_opps[resource_get_level("vdd2_opp")].opp_id;
> +
> + if (sr->is_autocomp_active && !sr->is_sr_reset) {
> + sr->req_opp_no = current_opp_no;
> + ret = srvp_disable(sr);
> + if (ret)
> + pr_err("SR[%d]:disable_smartreflex:"
> + "failed disable SR\n", sr->srid);
> + }
> +
> + /* Reset the voltage for current OPP to nominal if SR
> was enabled */
> + if (sr->is_autocomp_active)
> + sr_vp_reset_voltage(srid);
> +}
> +EXPORT_SYMBOL(disable_smartreflex);
> +
> +/**
> + * @brief enable_smartreflex - enable smart reflex after WFI is hit
> + *
> + * @param srid -SR ID to hit
> + */
> +void enable_smartreflex(u8 srid)
> +{
> + struct omap_sr *sr;
> + int ret;
> + u32 current_opp_no;
> +
> + /* I want to be in irq_disabled context..
> + * else I will die.. find the rootcause and fix it instead
> + */
> + BUG_ON(!irqs_disabled());
> +
> + sr = (srid == SR1) ? &sr1 : &sr2;
> +
> + current_opp_no = (sr->srid == SR1) ?
> + mpu_opps[resource_get_level("vdd1_opp")].opp_id :
> + l3_opps[resource_get_level("vdd2_opp")].opp_id;
> + if (sr->is_autocomp_active && sr->is_sr_reset) {
> + ret = srvp_enable(sr, current_opp_no);
> + if (ret)
> + pr_err("SR[%d]:enable_smartreflex:"
> + "failed enable SR\n", sr->srid);
> + }
> +}
> +EXPORT_SYMBOL(enable_smartreflex);
> +
> +/*********************** SYSFS ENTRY POINTS
> *********************************/
> +/**
> + * @brief omap_sr_vdd_autocomp_show - Sysfs entry for
> showing SR status
> + *
> + */
> +static ssize_t omap_sr_vdd_autocomp_show(struct kobject *kobj,
> + struct kobj_attribute
> *attr, char *buf)
> +{
> + u8 srid;
> + struct omap_sr *sr;
> + srid = (strcmp(attr->attr.name, "sr_vdd1_autocomp") ==
> 0) ? SR1 : SR2;
> + sr = (srid == SR1) ? &sr1 : &sr2;
> + return sprintf(buf, "%d\n", sr->is_autocomp_active);
> +}
> +
> +/**
> + * @brief omap_sr_vdd_autocomp_store - enable/disable SR
> + *
> + */
> +static ssize_t omap_sr_vdd_autocomp_store(struct kobject *kobj,
> + struct kobj_attribute *attr,
> + const char *buf, size_t n)
> +{
> + unsigned short value;
> + u8 srid;
> + struct omap_sr *sr;
> + int ret = 0;
> + u32 current_vddopp_no;
> + const char *name;
> +
> + name = attr->attr.name;
> +
> + srid = (strcmp(name, "sr_vdd1_autocomp") == 0) ? SR1 : SR2;
> + sr = (srid == SR1) ? &sr1 : &sr2;
> + current_vddopp_no = (sr->srid == SR1) ?
> + mpu_opps[resource_get_level("vdd1_opp")].opp_id :
> + l3_opps[resource_get_level("vdd2_opp")].opp_id;
> +
> + if (sscanf(buf, "%hu", &value) != 1 || (value > 1)) {
> + pr_err("%s: Invalid value[%d]. Use 0 or 1\n",
> name, value);
> + return -EINVAL;
> + }
> + if (sr->is_autocomp_active == value) {
> + pr_info("%s: Already set to %d \n", name, value);
> + return n;
> + }
> + /*
> + * Sanity check-might happen if SR and dvfs/idle paths collide
> + * but unlikely though..
> + */
> + if (unlikely(value ^ sr->is_sr_reset)) {
> + pr_warning("%s: Is already set %d Vs %d.\n",
> name, value,
> + sr->is_sr_reset);
> + return n;
> + }
> +
> + if (value)
> + ret = srvp_enable(sr, current_vddopp_no);
> + else {
> + ret = srvp_disable(sr);
> + /* reset the voltage back to nominal */
> + sr_vp_configure(sr);
> + }
> + if (!ret) {
> + sr->is_autocomp_active = value;
> + ret = n;
> + }
> +
> + return ret;
> +}
> +
> +static struct kobj_attribute sr_vdd1_autocomp = {
> + .attr = {
> + .name = __stringify(sr_vdd1_autocomp),
> + .mode = 0644,
> + },
> + .show = omap_sr_vdd_autocomp_show,
> + .store = omap_sr_vdd_autocomp_store,
> +};
> +
> +static struct kobj_attribute sr_vdd2_autocomp = {
> + .attr = {
> + .name = __stringify(sr_vdd2_autocomp),
> + .mode = 0644,
> + },
> + .show = omap_sr_vdd_autocomp_show,
> + .store = omap_sr_vdd_autocomp_store,
> +};
> +
> +/*********************** INIT FUNCTIONS
> *************************************/
> +
> +/**
> + * @brief srvp_init - configure smart reflex and VP params
> + *
> + * @param sr - structure of sr of interest
> + */
> +static void __init srvp_init(struct omap_sr *sr)
> +{
> + struct clk *sys_ck;
> + u32 sys_clk_speed;
> + u32 clk_len;
> + u32 senn_mod, senp_mod;
> +
> + /* Grab the clock speed */
> + sys_ck = clk_get(NULL, "sys_ck");
> + sys_clk_speed = clk_get_rate(sys_ck);
> + clk_put(sys_ck);
> +
> + switch (sys_clk_speed) {
> + case 12000000:
> + clk_len = SRCLKLENGTH_12MHZ_SYSCLK;
> + break;
> + case 13000000:
> + clk_len = SRCLKLENGTH_13MHZ_SYSCLK;
> + break;
> + case 19200000:
> + clk_len = SRCLKLENGTH_19MHZ_SYSCLK;
> + break;
> + case 26000000:
> + clk_len = SRCLKLENGTH_26MHZ_SYSCLK;
> + break;
> + case 38400000:
> + clk_len = SRCLKLENGTH_38MHZ_SYSCLK;
> + break;
> + default:
> + pr_err("SR[%d]:Invalid sysclk value: %d\n", sr->srid,
> + sys_clk_speed);
> + BUG();
> + return;
> + }
> + /* Configure from the nvalues */
> + if (sr->srid == SR1) {
> + senn_mod = (omap_ctrl_readl(OMAP343X_CONTROL_FUSE_SR) &
> + OMAP343X_SR1_SENNENABLE_MASK) >>
> + OMAP343X_SR1_SENNENABLE_SHIFT;
> + senp_mod = (omap_ctrl_readl(OMAP343X_CONTROL_FUSE_SR) &
> + OMAP343X_SR1_SENPENABLE_MASK) >>
> + OMAP343X_SR1_SENPENABLE_SHIFT;
> +
> + sr->opp_nvalue[4] =
> + omap_ctrl_readl(OMAP343X_CONTROL_FUSE_OPP5_VDD1);
> + sr->opp_nvalue[3] =
> + omap_ctrl_readl(OMAP343X_CONTROL_FUSE_OPP4_VDD1);
> + sr->opp_nvalue[2] =
> + omap_ctrl_readl(OMAP343X_CONTROL_FUSE_OPP3_VDD1);
> + sr->opp_nvalue[1] =
> + omap_ctrl_readl(OMAP343X_CONTROL_FUSE_OPP2_VDD1);
> + sr->opp_nvalue[0] =
> + omap_ctrl_readl(OMAP343X_CONTROL_FUSE_OPP1_VDD1);
> + sr->sr_errconfig_value = SR1_ERRWEIGHT |
> SR1_ERRMAXLIMIT;
> + sr->vp.vplimito_value |=
> sr_vplimito_value(sys_clk_speed,
> +
> PRM_VP1_VLIMITTO_TIMEOUT_US)
> + << PRM_VP1_VLIMITTO_TIMEOUT_SHIFT;
> +
> + } else {
> + senn_mod = (omap_ctrl_readl(OMAP343X_CONTROL_FUSE_SR) &
> + OMAP343X_SR2_SENNENABLE_MASK) >>
> + OMAP343X_SR2_SENNENABLE_SHIFT;
> +
> + senp_mod = (omap_ctrl_readl(OMAP343X_CONTROL_FUSE_SR) &
> + OMAP343X_SR2_SENPENABLE_MASK) >>
> + OMAP343X_SR2_SENPENABLE_SHIFT;
> +
> + sr->opp_nvalue[2] =
> + omap_ctrl_readl(OMAP343X_CONTROL_FUSE_OPP3_VDD2);
> + sr->opp_nvalue[1] =
> + omap_ctrl_readl(OMAP343X_CONTROL_FUSE_OPP2_VDD2);
> + sr->opp_nvalue[0] =
> + omap_ctrl_readl(OMAP343X_CONTROL_FUSE_OPP1_VDD2);
> + sr->sr_errconfig_value = SR2_ERRWEIGHT |
> SR2_ERRMAXLIMIT;
> + sr->vp.vplimito_value |=
> sr_vplimito_value(sys_clk_speed,
> +
> PRM_VP2_VLIMITTO_TIMEOUT_US)
> + << PRM_VP2_VLIMITTO_TIMEOUT_SHIFT;
> + }
> +
> + sr->sr_errconfig_value |=
> + ERRCONFIG_VPBOUNDINTEN | ERRCONFIG_VPBOUNDINTST |
> + SR_CLKACTIVITY_IOFF_FON;
> +
> + sr->sr_config_value =
> + (clk_len << SRCONFIG_SRCLKLENGTH_SHIFT) | SRCONFIG_ERRGEN_EN
> + | SRCONFIG_SENENABLE | (senn_mod <<
> + SRCONFIG_SENNENABLE_SHIFT) |
> + (senp_mod << SRCONFIG_SENPENABLE_SHIFT) |
> SRCONFIG_DELAYCTRL;
> +
> + /* Set up nominal voltage */
> + sr_vp_configure(sr);
> +}
> +
> +/**
> + * @brief omap_sr_init - SR initialization
> + *
> + * @return 0
> + */
> +static int __init omap_sr_init(void)
> +{
> + int ret = 0;
> + ret = omap_pmic_srinit();
> + if (ret) {
> + pr_crit("PMIC init failed during SmartReflex
> initilization."
> + "connectivity issues?: %d\n", ret);
> + return ret;
> + }
> + /* TODO: Extend this support for various PMICs */
> + if (cpu_is_omap34xx()) {
> + sr1.fclk = clk_get(NULL, "sr1_fck");
> + sr1.iclk = clk_get(NULL, "sr_l4_ick");
> + sr1.srbase_addr = ioremap((u32) sr1.srbase_addr, SZ_4K);
> + sr2.fclk = clk_get(NULL, "sr2_fck");
> + sr2.iclk = clk_get(NULL, "sr_l4_ick");
> + sr2.srbase_addr = ioremap((u32) sr2.srbase_addr, SZ_4K);
> +
> + srvp_init(&sr1);
> + srvp_init(&sr2);
> +
> + } else {
> + pr_warning("SmartReflex is not supported\n");
> + return -ENODEV;
> + }
> +
> + pr_info("SmartReflex driver initialized\n");
> +
> + ret = sysfs_create_file(power_kobj, &sr_vdd1_autocomp.attr);
> + if (ret)
> + pr_warning("sysfs_create_file failed: %d\n", ret);
> +
> + ret = sysfs_create_file(power_kobj, &sr_vdd2_autocomp.attr);
> + if (ret)
> + pr_warning("sysfs_create_file failed: %d\n", ret);
> +
> + return 0;
> +}
> +
> +late_initcall(omap_sr_init);
> diff --git a/arch/arm/mach-omap2/smartreflex.h
> b/arch/arm/mach-omap2/smartreflex.h
> new file mode 100644
> index 0000000..421f8b6
> --- /dev/null
> +++ b/arch/arm/mach-omap2/smartreflex.h
> @@ -0,0 +1,274 @@
> +#ifndef __ARCH_ARM_MACH_OMAP3_SMARTREFLEX_H
> +#define __ARCH_ARM_MACH_OMAP3_SMARTREFLEX_H
> +/*
> + * linux/arch/arm/mach-omap2/smartreflex.h
> + *
> + * Copyright (C) 2009 Texas Instruments, Inc.
> + * Nishanth Menon
> + *
> + * Copyright (C) 2008 Nokia Corporation
> + * Kalle Jokiniemi
> + *
> + * Copyright (C) 2007 Texas Instruments, Inc.
> + * Lesly A M <x0080970@xxxxxx>
> + *
> + * 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.
> + */
> +
> +/* SMART REFLEX REG ADDRESS OFFSET */
> +#define SRCONFIG 0x00
> +#define SRSTATUS 0x04
> +#define SENVAL 0x08
> +#define SENMIN 0x0C
> +#define SENMAX 0x10
> +#define SENAVG 0x14
> +#define AVGWEIGHT 0x18
> +#define NVALUERECIPROCAL 0x1C
> +#define SENERROR 0x20
> +#define ERRCONFIG 0x24
> +
> +/* SR Modules */
> +#define SR1 1
> +#define SR2 2
> +
> +#define VP1_IRQMASK_TRANSDONE (0x1 << 15)
> +#define VP2_IRQMASK_TRANSDONE (0x1 << 21)
> +
> +/* PRM_VP1_CONFIG */
> +#define PRM_VP1_CONFIG_ERROROFFSET (0x00 << 24)
> +#define PRM_VP1_CONFIG_ERRORGAIN (0x18 << 16)
> +#define SR_ERRGAIN_LOWOP (0x0C)
> +#define SR_ERRGAIN_HIGHOPP (0x18)
> +#define SR_ERRMINLIMIT_LOWOPP (0xF4 << 0)
> +#define SR_ERRMINLIMIT_HIGHOPP (0xF9 << 0)
> +#define PRM_VP_STATUS_VPINIDLE (0x1 << 0)
> +
> +#define PRM_VP1_CONFIG_INITVOLTAGE (0x30 << 8) /* 1.2 volt */
> +#define PRM_VP1_CONFIG_TIMEOUTEN (0x1 << 3)
> +#define PRM_VP1_CONFIG_INITVDD (0x1 << 2)
> +#define PRM_VP1_CONFIG_FORCEUPDATE (0x1 << 1)
> +#define PRM_VP1_CONFIG_VPENABLE (0x1 << 0)
> +
> +/* PRM_VP1_VSTEPMIN */
> +#define PRM_VP1_VSTEPMIN_SMPSWAITTIMEMIN (0x03C << 8)
> +#define PRM_VP1_VSTEPMIN_VSTEPMIN (0x01 << 0)
> +
> +/* PRM_VP1_VSTEPMAX */
> +#define PRM_VP1_VSTEPMAX_SMPSWAITTIMEMAX (0x003C << 8)
> +#define PRM_VP1_VSTEPMAX_VSTEPMAX (0x08 << 0)
> +
> +/* PRM_VP1_VLIMITTO */
> +#define PRM_VP1_VLIMITTO_VDDMAX (0x44 << 24)
> +#define PRM_VP1_VLIMITTO_VDDMIN (0x14 << 16)
> +#define PRM_VP1_VLIMITTO_TIMEOUT_US (200)
> +#define PRM_VP1_VLIMITTO_TIMEOUT_SHIFT (0)
> +
> +/* PRM_VP2_CONFIG */
> +#define PRM_VP2_CONFIG_ERROROFFSET (0x00 << 24)
> +#define PRM_VP2_CONFIG_ERRORGAIN (0x18 << 16)
> +
> +#define PRM_VP2_CONFIG_INITVOLTAGE (0x30 << 8) /* 1.2 volt */
> +#define PRM_VP2_CONFIG_TIMEOUTEN (0x1 << 3)
> +#define PRM_VP2_CONFIG_INITVDD (0x1 << 2)
> +#define PRM_VP2_CONFIG_FORCEUPDATE (0x1 << 1)
> +#define PRM_VP2_CONFIG_VPENABLE (0x1 << 0)
> +
> +/* PRM_VP2_VSTEPMIN */
> +#define PRM_VP2_VSTEPMIN_SMPSWAITTIMEMIN (0x03C << 8)
> +#define PRM_VP2_VSTEPMIN_VSTEPMIN (0x01 << 0)
> +
> +/* PRM_VP2_VSTEPMAX */
> +#define PRM_VP2_VSTEPMAX_SMPSWAITTIMEMAX (0x003C << 8)
> +#define PRM_VP2_VSTEPMAX_VSTEPMAX (0x08 << 0)
> +
> +/* PRM_VP2_VLIMITTO */
> +#define PRM_VP2_VLIMITTO_VDDMAX (0x42 << 24)
> +#define PRM_VP2_VLIMITTO_VDDMIN (0x18 << 16)
> +#define PRM_VP2_VLIMITTO_TIMEOUT_US (200)
> +#define PRM_VP2_VLIMITTO_TIMEOUT_SHIFT (0)
> +
> +/* SRCONFIG */
> +#define SRCLKLENGTH_12MHZ_SYSCLK 0x3C
> +#define SRCLKLENGTH_13MHZ_SYSCLK 0x41
> +#define SRCLKLENGTH_19MHZ_SYSCLK 0x60
> +#define SRCLKLENGTH_26MHZ_SYSCLK 0x82
> +#define SRCLKLENGTH_38MHZ_SYSCLK 0xC0
> +
> +#define SRCONFIG_SRCLKLENGTH_SHIFT 12
> +#define SRCONFIG_SENNENABLE_SHIFT 5
> +#define SRCONFIG_SENPENABLE_SHIFT 3
> +
> +#define SRCONFIG_SRENABLE (0x01 << 11)
> +#define SRCONFIG_SENENABLE (0x01 << 10)
> +#define SRCONFIG_ERRGEN_EN (0x01 << 9)
> +#define SRCONFIG_MINMAXAVG_EN (0x01 << 8)
> +
> +#define SRCONFIG_DELAYCTRL (0x01 << 2)
> +#define SRCONFIG_CLKCTRL (0x00 << 0)
> +
> +/* NVALUERECIPROCAL */
> +#define NVALUERECIPROCAL_SENPGAIN_SHIFT 20
> +#define NVALUERECIPROCAL_SENNGAIN_SHIFT 16
> +#define NVALUERECIPROCAL_RNSENP_SHIFT 8
> +#define NVALUERECIPROCAL_RNSENN_SHIFT 0
> +
> +/* ERRCONFIG */
> +#define SR_CLKACTIVITY_MASK (0x03 << 20)
> +#define SR_ERRWEIGHT_MASK (0x07 << 16)
> +#define SR_ERRMAXLIMIT_MASK (0xFF << 8)
> +#define SR_ERRMINLIMIT_MASK (0xFF << 0)
> +
> +#define SR_CLKACTIVITY_IOFF_FOFF (0x00 << 20)
> +#define SR_CLKACTIVITY_IOFF_FON (0x02 << 20)
> +
> +#define ERRCONFIG_VPBOUNDINTEN (0x1 << 31)
> +#define ERRCONFIG_MCUDISACKINTEN (0x1 << 23)
> +
> +/* Status Bits */
> +#define ERRCONFIG_VPBOUNDINTST (0x1 << 30)
> +#define ERRCONFIG_MCUACCUMINTST (0x1 << 28)
> +#define ERRCONFIG_MCUVALIDINTST (0x1 << 26)
> +#define ERRCONFIG_MCUBOUNDINTST (0x1 << 24)
> +#define ERRCONFIG_MCUDISACKINTST (0x1 << 22)
> +
> +/* WARNING: Ensure all access to errconfig register skips
> + * clearing intst bits to ensure that we dont clear status
> + * bits unwantedly.. esp vpbound
> + */
> +#define ERRCONFIG_INTERRUPT_STATUS_MASK (ERRCONFIG_VPBOUNDINTST |\
> + ERRCONFIG_MCUACCUMINTST |\
> + ERRCONFIG_MCUVALIDINTST |\
> + ERRCONFIG_MCUBOUNDINTST |\
> + ERRCONFIG_MCUDISACKINTST | (0X1<<19))
> +
> +#define SR1_ERRWEIGHT (0x04 << 16)
> +#define SR1_ERRMAXLIMIT (0x02 << 8)
> +#define SR1_ERRMINLIMIT (0xFA << 0)
> +
> +#define SR2_ERRWEIGHT (0x04 << 16)
> +#define SR2_ERRMAXLIMIT (0x02 << 8)
> +#define SR2_ERRMINLIMIT (0xFA << 0)
> +
> +/* T2 SMART REFLEX */
> +#define R_SRI2C_SLAVE_ADDR 0x12
> +#define R_VDD1_SR_CONTROL 0x00
> +#define R_VDD2_SR_CONTROL 0x01
> +
> +/* VDDs*/
> +#define PRCM_VDD1 1
> +#define PRCM_VDD2 2
> +
> +/*
> + * XXX: These should be removed/moved from here once we have
> a working DVFS
> + * implementation in place
> + */
> +#define PHY_TO_OFF_PM_MASTER(p) (p - 0x36)
> +#define PHY_TO_OFF_PM_RECIEVER(p) (p - 0x5b)
> +#define PHY_TO_OFF_PM_INT(p) (p - 0x2e)
> +
> +/* Vmode control */
> +#define R_DCDC_GLOBAL_CFG PHY_TO_OFF_PM_RECIEVER(0x61)
> +/* R_DCDC_GLOBAL_CFG register, SMARTREFLEX_ENABLE values */
> +#define DCDC_GLOBAL_CFG_ENABLE_SRFLX 0x08
> +
> +/* DEVICE ID/DPLL ID/CLOCK ID: bits 28-31 for OMAP type */
> +#define OMAP_TYPE_SHIFT 28
> +#define OMAP_TYPE_MASK 0xF
> +/* OPP ID: bits: 0-4 for OPP number */
> +#define OPP_NO_POS 0
> +#define OPP_NO_MASK 0x1F
> +/* OPP ID: bits: 5-6 for VDD */
> +#define VDD_NO_POS 5
> +#define VDD_NO_MASK 0x3
> +/* Other IDs: bits 20-27 for ID type */
> +/* These IDs have bits 25,26,27 as 1 */
> +#define OTHER_ID_TYPE_SHIFT 20
> +#define OTHER_ID_TYPE_MASK 0xFF
> +
> +#define OTHER_ID_TYPE(X) ((X & OTHER_ID_TYPE_MASK) <<
> OTHER_ID_TYPE_SHIFT)
> +#define ID_OPP_NO(X) ((X & OPP_NO_MASK) << OPP_NO_POS)
> +#define ID_VDD(X) ((X & VDD_NO_MASK) << VDD_NO_POS)
> +#define OMAP(X) ((X >> OMAP_TYPE_SHIFT) &
> OMAP_TYPE_MASK)
> +#define get_opp_no(X) ((X >> OPP_NO_POS) & OPP_NO_MASK)
> +#define get_vdd(X) ((X >> VDD_NO_POS) & VDD_NO_MASK)
> +
> +/* XXX: end remove/move */
> +
> +/* XXX: find more appropriate place for these once DVFS is
> in place */
> +extern u32 current_vdd1_opp;
> +extern u32 current_vdd2_opp;
> +
> +/*
> + * Smartreflex module enable/disable interface.
> + * NOTE: if smartreflex is not enabled from sysfs, these
> functions will not
> + * do anything.
> + */
> +#ifdef CONFIG_OMAP_SMARTREFLEX
> +void enable_smartreflex(u8 srid);
> +void disable_smartreflex(u8 srid);
> +int sr_voltage_set(u32 target_opp, u32 current_opp,
> + u8 target_vsel, u8 current_vsel);
> +int sr_vp_disable_both(u32 target_opp, u32 current_opp);
> +int sr_vp_enable_both(u32 target_opp, u32 current_opp);
> +int vc_send_command(u8 slave_addr, u8 reg_addr, u8 data, u16
> *timeout_us);
> +int omap_pmic_srinit(void);
> +u32 omap_pmic_voltage_ramp_delay(u8 srid, u8 target_vsel, u8
> current_vsel);
> +#ifdef CONFIG_OMAP_VC_BYPASS_UPDATE
> +int omap_pmic_voltage_cmds(u8 srid, u8 target_vsel);
> +#endif
> +
> +#ifdef CONFIG_PM_DEBUG
> +#define __SR_DEBUG
> +#endif
> +
> +#else
> +static inline void enable_smartreflex(u8 srid)
> +{
> +}
> +
> +static inline void disable_smartreflex(u8 srid)
> +{
> +}
> +
> +static inline int sr_voltage_set(u32 target_opp, u32 current_opp,
> + u8 target_vsel, u8 current_vsel)
> +{
> + return -EINVAL;
> +}
> +
> +static inline int sr_vp_disable_both(u32 target_opp, u32 current_opp)
> +{
> + return -EINVAL;
> +}
> +
> +static inline int sr_vp_enable_both(u32 target_opp, u32 current_opp)
> +{
> + return -EINVAL;
> +}
> +
> +static inline int vc_send_command(u8 slave_addr, u8
> reg_addr, u8 data,
> + u16 *timeout_us)
> +{
> + return -EINVAL;
> +}
> +
> +#ifdef CONFIG_OMAP_VC_BYPASS_UPDATE
> +static inline int omap_pmic_voltage_cmds(u8 srid, u8 target_vsel)
> +{
> + return -EINVAL;
> +}
> +#endif
> +#endif
> +
> +#ifdef __SR_DEBUG
> +int sr_debugfs_create_entries(struct dentry *d);
> +#else
> +static inline int sr_debugfs_create_entries(struct dentry *d)
> +{
> + return -EINVAL;
> +}
> +#endif
> +
> +#endif /*
> __ARCH_ARM_MACH_OMAP3_SMARTREFLEX_H */
> diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
> index 2143db5..6a3302c 100644
> --- a/arch/arm/plat-omap/Kconfig
> +++ b/arch/arm/plat-omap/Kconfig
> @@ -81,19 +81,14 @@ config OMAP_SMARTREFLEX
> compensation for VDD1 and VDD2, user must write 1 to
> /sys/power/sr_vddX_autocomp, where X is 1 or 2.
>
> -config OMAP_SMARTREFLEX_TESTING
> - bool "Smartreflex testing support"
> +config OMAP_VC_BYPASS_UPDATE
> + bool "Use VC Bypass method of updating voltage"
> depends on OMAP_SMARTREFLEX
> default n
> help
> - Say Y if you want to enable SmartReflex testing with
> SW hardcoded
> - NVALUES intead of E-fuse NVALUES set in factory
> silicon testing.
> -
> - In some devices the E-fuse values have not been set,
> even though
> - SmartReflex modules are included. Using these
> hardcoded values set
> - in software, one can test the SmartReflex features
> without E-fuse.
> -
> - WARNING: Enabling this option may cause your device to hang!
> + Say Y if you would like to use VC Bypass method of
> + update. If this is disabled, the default
> + VP forceupdate method is used.
>
> config OMAP_RESET_CLOCKS
> bool "Reset unused clocks during boot"
> --
> 1.6.3.3
>
>
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