linux-imx

/*

 * Texas Instruments SoC Adaptive Body Bias(ABB) Regulator

 *

 * Copyright (C) 2011 Texas Instruments, Inc.

 * Mike Turquette <mturquette@ti.com>

 *

 * Copyright (C) 2012-2013 Texas Instruments, Inc.

 * Andrii Tseglytskyi <andrii.tseglytskyi@ti.com>

 * Nishanth Menon <nm@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.

 *

 * This program is distributed "as is" WITHOUT ANY WARRANTY of any

 * kind, whether express or implied; without even the implied warranty

 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

​

/*

 * ABB LDO operating states:

 * NOMINAL_OPP: bypasses the ABB LDO

 * FAST_OPP:    sets ABB LDO to Forward Body-Bias

 * SLOW_OPP:    sets ABB LDO to Reverse Body-Bias

 */

#define TI_ABB_NOMINAL_OPP  0

#define TI_ABB_FAST_OPP     1

#define TI_ABB_SLOW_OPP     3

​

/**

 * struct ti_abb_info - ABB information per voltage setting

 * @opp_sel:    one of TI_ABB macro

 * @vset:   (optional) vset value that LDOVBB needs to be overriden with.

 *

 * Array of per voltage entries organized in the same order as regulator_desc's

 * volt_table list. (selector is used to index from this array)

 */

struct ti_abb_info {

    u32 opp_sel;

    u32 vset;

};

​

/**

 * struct ti_abb_reg - Register description for ABB block

 * @setup_off:          setup register offset from base

 * @control_off:        control register offset from base

 * @sr2_wtcnt_value_mask:   setup register- sr2_wtcnt_value mask

 * @fbb_sel_mask:       setup register- FBB sel mask

 * @rbb_sel_mask:       setup register- RBB sel mask

 * @sr2_en_mask:        setup register- enable mask

 * @opp_change_mask:        control register - mask to trigger LDOVBB change

 * @opp_sel_mask:       control register - mask for mode to operate

 */

struct ti_abb_reg {

    u32 setup_off;

    u32 control_off;

​

    /* Setup register fields */

    u32 sr2_wtcnt_value_mask;

    u32 fbb_sel_mask;

    u32 rbb_sel_mask;

    u32 sr2_en_mask;

​

    /* Control register fields */

    u32 opp_change_mask;

    u32 opp_sel_mask;

};

​

/**

 * struct ti_abb - ABB instance data

 * @rdesc:          regulator descriptor

 * @clk:            clock(usually sysclk) supplying ABB block

 * @base:           base address of ABB block

 * @setup_reg:          setup register of ABB block

 * @control_reg:        control register of ABB block

 * @int_base:           interrupt register base address

 * @efuse_base:         (optional) efuse base address for ABB modes

 * @ldo_base:           (optional) LDOVBB vset override base address

 * @regs:           pointer to struct ti_abb_reg for ABB block

 * @txdone_mask:        mask on int_base for tranxdone interrupt