e7cd1d1eb1
The twl4030 PMIC needs to be configured properly for things like warm reset and deeper idle states so the PMIC manages the regulators properly based on the hardware triggers from the SoC. Earlier we have configured twl4030 using platform data, but we want to do it for device tree based booting also. In some cases configuring twl4030 is needed for things to work. For example, when rebooting an OMAP3530 at 125 MHz, it hangs. With this patch, TWL4030 will be reset when a warm reset occures, and OMAP3530 does not hang on reboot. Let's add device tree support and configure things for warm reset as the default when compatible = "ti,twl4030-power". More complicated configurations can be added to the driver based on other compatible flags. Note we now also make the pdata const like it should be. This allows use it for match->data with the device tree related functions. Based on earlier patch by Matthias Brugger <matthias.bgg@gmail.com> and Lesly A M <leslyam@ti.com>. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
748 lines
18 KiB
C
748 lines
18 KiB
C
/*
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* linux/drivers/i2c/chips/twl4030-power.c
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*
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* Handle TWL4030 Power initialization
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*
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* Copyright (C) 2008 Nokia Corporation
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* Copyright (C) 2006 Texas Instruments, Inc
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*
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* Written by Kalle Jokiniemi
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* Peter De Schrijver <peter.de-schrijver@nokia.com>
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* Several fixes by Amit Kucheria <amit.kucheria@verdurent.com>
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/pm.h>
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#include <linux/i2c/twl.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <asm/mach-types.h>
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static u8 twl4030_start_script_address = 0x2b;
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/* Register bits for P1, P2 and P3_SW_EVENTS */
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#define PWR_STOPON_PRWON BIT(6)
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#define PWR_STOPON_SYSEN BIT(5)
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#define PWR_ENABLE_WARMRESET BIT(4)
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#define PWR_LVL_WAKEUP BIT(3)
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#define PWR_DEVACT BIT(2)
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#define PWR_DEVSLP BIT(1)
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#define PWR_DEVOFF BIT(0)
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#define SEQ_OFFSYNC (1 << 0)
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#define PHY_TO_OFF_PM_MASTER(p) (p - 0x36)
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#define PHY_TO_OFF_PM_RECEIVER(p) (p - 0x5b)
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/* resource - hfclk */
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#define R_HFCLKOUT_DEV_GRP PHY_TO_OFF_PM_RECEIVER(0xe6)
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/* PM events */
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#define R_P1_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x46)
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#define R_P2_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x47)
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#define R_P3_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x48)
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#define R_CFG_P1_TRANSITION PHY_TO_OFF_PM_MASTER(0x36)
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#define R_CFG_P2_TRANSITION PHY_TO_OFF_PM_MASTER(0x37)
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#define R_CFG_P3_TRANSITION PHY_TO_OFF_PM_MASTER(0x38)
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#define END_OF_SCRIPT 0x3f
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#define R_SEQ_ADD_A2S PHY_TO_OFF_PM_MASTER(0x55)
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#define R_SEQ_ADD_S2A12 PHY_TO_OFF_PM_MASTER(0x56)
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#define R_SEQ_ADD_S2A3 PHY_TO_OFF_PM_MASTER(0x57)
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#define R_SEQ_ADD_WARM PHY_TO_OFF_PM_MASTER(0x58)
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#define R_MEMORY_ADDRESS PHY_TO_OFF_PM_MASTER(0x59)
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#define R_MEMORY_DATA PHY_TO_OFF_PM_MASTER(0x5a)
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/* resource configuration registers
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<RESOURCE>_DEV_GRP at address 'n+0'
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<RESOURCE>_TYPE at address 'n+1'
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<RESOURCE>_REMAP at address 'n+2'
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<RESOURCE>_DEDICATED at address 'n+3'
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*/
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#define DEV_GRP_OFFSET 0
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#define TYPE_OFFSET 1
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#define REMAP_OFFSET 2
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#define DEDICATED_OFFSET 3
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/* Bit positions in the registers */
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/* <RESOURCE>_DEV_GRP */
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#define DEV_GRP_SHIFT 5
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#define DEV_GRP_MASK (7 << DEV_GRP_SHIFT)
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/* <RESOURCE>_TYPE */
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#define TYPE_SHIFT 0
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#define TYPE_MASK (7 << TYPE_SHIFT)
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#define TYPE2_SHIFT 3
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#define TYPE2_MASK (3 << TYPE2_SHIFT)
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/* <RESOURCE>_REMAP */
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#define SLEEP_STATE_SHIFT 0
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#define SLEEP_STATE_MASK (0xf << SLEEP_STATE_SHIFT)
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#define OFF_STATE_SHIFT 4
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#define OFF_STATE_MASK (0xf << OFF_STATE_SHIFT)
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static u8 res_config_addrs[] = {
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[RES_VAUX1] = 0x17,
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[RES_VAUX2] = 0x1b,
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[RES_VAUX3] = 0x1f,
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[RES_VAUX4] = 0x23,
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[RES_VMMC1] = 0x27,
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[RES_VMMC2] = 0x2b,
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[RES_VPLL1] = 0x2f,
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[RES_VPLL2] = 0x33,
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[RES_VSIM] = 0x37,
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[RES_VDAC] = 0x3b,
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[RES_VINTANA1] = 0x3f,
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[RES_VINTANA2] = 0x43,
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[RES_VINTDIG] = 0x47,
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[RES_VIO] = 0x4b,
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[RES_VDD1] = 0x55,
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[RES_VDD2] = 0x63,
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[RES_VUSB_1V5] = 0x71,
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[RES_VUSB_1V8] = 0x74,
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[RES_VUSB_3V1] = 0x77,
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[RES_VUSBCP] = 0x7a,
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[RES_REGEN] = 0x7f,
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[RES_NRES_PWRON] = 0x82,
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[RES_CLKEN] = 0x85,
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[RES_SYSEN] = 0x88,
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[RES_HFCLKOUT] = 0x8b,
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[RES_32KCLKOUT] = 0x8e,
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[RES_RESET] = 0x91,
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[RES_MAIN_REF] = 0x94,
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};
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/*
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* Usable values for .remap_sleep and .remap_off
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* Based on table "5.3.3 Resource Operating modes"
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*/
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enum {
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TWL_REMAP_OFF = 0,
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TWL_REMAP_SLEEP = 8,
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TWL_REMAP_ACTIVE = 9,
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};
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/*
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* Macros to configure the PM register states for various resources.
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* Note that we can make MSG_SINGULAR etc private to this driver once
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* omap3 has been made DT only.
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*/
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#define TWL_DFLT_DELAY 2 /* typically 2 32 KiHz cycles */
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#define TWL_RESOURCE_SET(res, state) \
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{ MSG_SINGULAR(DEV_GRP_NULL, (res), (state)), TWL_DFLT_DELAY }
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#define TWL_RESOURCE_ON(res) TWL_RESOURCE_SET(res, RES_STATE_ACTIVE)
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#define TWL_RESOURCE_OFF(res) TWL_RESOURCE_SET(res, RES_STATE_OFF)
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#define TWL_RESOURCE_RESET(res) TWL_RESOURCE_SET(res, RES_STATE_WRST)
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/*
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* It seems that type1 and type2 is just the resource init order
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* number for the type1 and type2 group.
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*/
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#define TWL_RESOURCE_GROUP_RESET(group, type1, type2) \
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{ MSG_BROADCAST(DEV_GRP_NULL, (group), (type1), (type2), \
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RES_STATE_WRST), TWL_DFLT_DELAY }
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#define TWL_REMAP_SLEEP(res, devgrp, typ, typ2) \
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{ .resource = (res), .devgroup = (devgrp), \
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.type = (typ), .type2 = (typ2), \
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.remap_off = TWL_REMAP_OFF, \
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.remap_sleep = TWL_REMAP_SLEEP, }
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static int twl4030_write_script_byte(u8 address, u8 byte)
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{
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int err;
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_MEMORY_ADDRESS);
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if (err)
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goto out;
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, byte, R_MEMORY_DATA);
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out:
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return err;
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}
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static int twl4030_write_script_ins(u8 address, u16 pmb_message,
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u8 delay, u8 next)
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{
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int err;
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address *= 4;
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err = twl4030_write_script_byte(address++, pmb_message >> 8);
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if (err)
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goto out;
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err = twl4030_write_script_byte(address++, pmb_message & 0xff);
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if (err)
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goto out;
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err = twl4030_write_script_byte(address++, delay);
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if (err)
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goto out;
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err = twl4030_write_script_byte(address++, next);
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out:
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return err;
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}
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static int twl4030_write_script(u8 address, struct twl4030_ins *script,
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int len)
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{
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int err = -EINVAL;
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for (; len; len--, address++, script++) {
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if (len == 1) {
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err = twl4030_write_script_ins(address,
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script->pmb_message,
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script->delay,
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END_OF_SCRIPT);
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if (err)
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break;
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} else {
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err = twl4030_write_script_ins(address,
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script->pmb_message,
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script->delay,
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address + 1);
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if (err)
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break;
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}
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}
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return err;
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}
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static int twl4030_config_wakeup3_sequence(u8 address)
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{
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int err;
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u8 data;
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/* Set SLEEP to ACTIVE SEQ address for P3 */
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_S2A3);
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if (err)
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goto out;
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/* P3 LVL_WAKEUP should be on LEVEL */
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err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P3_SW_EVENTS);
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if (err)
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goto out;
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data |= PWR_LVL_WAKEUP;
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P3_SW_EVENTS);
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out:
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if (err)
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pr_err("TWL4030 wakeup sequence for P3 config error\n");
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return err;
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}
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static int twl4030_config_wakeup12_sequence(u8 address)
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{
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int err = 0;
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u8 data;
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/* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_S2A12);
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if (err)
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goto out;
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/* P1/P2 LVL_WAKEUP should be on LEVEL */
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err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P1_SW_EVENTS);
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if (err)
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goto out;
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data |= PWR_LVL_WAKEUP;
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P1_SW_EVENTS);
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if (err)
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goto out;
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err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P2_SW_EVENTS);
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if (err)
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goto out;
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data |= PWR_LVL_WAKEUP;
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P2_SW_EVENTS);
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if (err)
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goto out;
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if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) {
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/* Disabling AC charger effect on sleep-active transitions */
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err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data,
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R_CFG_P1_TRANSITION);
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if (err)
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goto out;
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data &= ~(1<<1);
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data,
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R_CFG_P1_TRANSITION);
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if (err)
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goto out;
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}
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out:
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if (err)
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pr_err("TWL4030 wakeup sequence for P1 and P2" \
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"config error\n");
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return err;
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}
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static int twl4030_config_sleep_sequence(u8 address)
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{
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int err;
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/* Set ACTIVE to SLEEP SEQ address in T2 memory*/
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_A2S);
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if (err)
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pr_err("TWL4030 sleep sequence config error\n");
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return err;
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}
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static int twl4030_config_warmreset_sequence(u8 address)
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{
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int err;
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u8 rd_data;
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/* Set WARM RESET SEQ address for P1 */
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_WARM);
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if (err)
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goto out;
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/* P1/P2/P3 enable WARMRESET */
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err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P1_SW_EVENTS);
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if (err)
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goto out;
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rd_data |= PWR_ENABLE_WARMRESET;
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P1_SW_EVENTS);
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if (err)
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goto out;
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err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P2_SW_EVENTS);
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if (err)
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goto out;
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rd_data |= PWR_ENABLE_WARMRESET;
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P2_SW_EVENTS);
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if (err)
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goto out;
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err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P3_SW_EVENTS);
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if (err)
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goto out;
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rd_data |= PWR_ENABLE_WARMRESET;
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P3_SW_EVENTS);
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out:
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if (err)
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pr_err("TWL4030 warmreset seq config error\n");
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return err;
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}
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static int twl4030_configure_resource(struct twl4030_resconfig *rconfig)
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{
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int rconfig_addr;
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int err;
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u8 type;
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u8 grp;
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u8 remap;
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if (rconfig->resource > TOTAL_RESOURCES) {
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pr_err("TWL4030 Resource %d does not exist\n",
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rconfig->resource);
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return -EINVAL;
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}
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rconfig_addr = res_config_addrs[rconfig->resource];
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/* Set resource group */
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err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &grp,
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rconfig_addr + DEV_GRP_OFFSET);
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if (err) {
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pr_err("TWL4030 Resource %d group could not be read\n",
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rconfig->resource);
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return err;
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}
|
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|
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if (rconfig->devgroup != TWL4030_RESCONFIG_UNDEF) {
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grp &= ~DEV_GRP_MASK;
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grp |= rconfig->devgroup << DEV_GRP_SHIFT;
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err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
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grp, rconfig_addr + DEV_GRP_OFFSET);
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if (err < 0) {
|
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pr_err("TWL4030 failed to program devgroup\n");
|
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return err;
|
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}
|
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}
|
|
|
|
/* Set resource types */
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err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &type,
|
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rconfig_addr + TYPE_OFFSET);
|
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if (err < 0) {
|
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pr_err("TWL4030 Resource %d type could not be read\n",
|
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rconfig->resource);
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return err;
|
|
}
|
|
|
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if (rconfig->type != TWL4030_RESCONFIG_UNDEF) {
|
|
type &= ~TYPE_MASK;
|
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type |= rconfig->type << TYPE_SHIFT;
|
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}
|
|
|
|
if (rconfig->type2 != TWL4030_RESCONFIG_UNDEF) {
|
|
type &= ~TYPE2_MASK;
|
|
type |= rconfig->type2 << TYPE2_SHIFT;
|
|
}
|
|
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
|
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type, rconfig_addr + TYPE_OFFSET);
|
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if (err < 0) {
|
|
pr_err("TWL4030 failed to program resource type\n");
|
|
return err;
|
|
}
|
|
|
|
/* Set remap states */
|
|
err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &remap,
|
|
rconfig_addr + REMAP_OFFSET);
|
|
if (err < 0) {
|
|
pr_err("TWL4030 Resource %d remap could not be read\n",
|
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rconfig->resource);
|
|
return err;
|
|
}
|
|
|
|
if (rconfig->remap_off != TWL4030_RESCONFIG_UNDEF) {
|
|
remap &= ~OFF_STATE_MASK;
|
|
remap |= rconfig->remap_off << OFF_STATE_SHIFT;
|
|
}
|
|
|
|
if (rconfig->remap_sleep != TWL4030_RESCONFIG_UNDEF) {
|
|
remap &= ~SLEEP_STATE_MASK;
|
|
remap |= rconfig->remap_sleep << SLEEP_STATE_SHIFT;
|
|
}
|
|
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
|
|
remap,
|
|
rconfig_addr + REMAP_OFFSET);
|
|
if (err < 0) {
|
|
pr_err("TWL4030 failed to program remap\n");
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int load_twl4030_script(struct twl4030_script *tscript,
|
|
u8 address)
|
|
{
|
|
int err;
|
|
static int order;
|
|
|
|
/* Make sure the script isn't going beyond last valid address (0x3f) */
|
|
if ((address + tscript->size) > END_OF_SCRIPT) {
|
|
pr_err("TWL4030 scripts too big error\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = twl4030_write_script(address, tscript->script, tscript->size);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (tscript->flags & TWL4030_WRST_SCRIPT) {
|
|
err = twl4030_config_warmreset_sequence(address);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
|
|
/* Reset any existing sleep script to avoid hangs on reboot */
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
|
|
R_SEQ_ADD_A2S);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = twl4030_config_wakeup12_sequence(address);
|
|
if (err)
|
|
goto out;
|
|
order = 1;
|
|
}
|
|
if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
|
|
err = twl4030_config_wakeup3_sequence(address);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
if (tscript->flags & TWL4030_SLEEP_SCRIPT) {
|
|
if (!order)
|
|
pr_warning("TWL4030: Bad order of scripts (sleep "\
|
|
"script before wakeup) Leads to boot"\
|
|
"failure on some boards\n");
|
|
err = twl4030_config_sleep_sequence(address);
|
|
}
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
int twl4030_remove_script(u8 flags)
|
|
{
|
|
int err = 0;
|
|
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
|
|
TWL4030_PM_MASTER_PROTECT_KEY);
|
|
if (err) {
|
|
pr_err("twl4030: unable to unlock PROTECT_KEY\n");
|
|
return err;
|
|
}
|
|
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
|
|
TWL4030_PM_MASTER_PROTECT_KEY);
|
|
if (err) {
|
|
pr_err("twl4030: unable to unlock PROTECT_KEY\n");
|
|
return err;
|
|
}
|
|
|
|
if (flags & TWL4030_WRST_SCRIPT) {
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
|
|
R_SEQ_ADD_WARM);
|
|
if (err)
|
|
return err;
|
|
}
|
|
if (flags & TWL4030_WAKEUP12_SCRIPT) {
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
|
|
R_SEQ_ADD_S2A12);
|
|
if (err)
|
|
return err;
|
|
}
|
|
if (flags & TWL4030_WAKEUP3_SCRIPT) {
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
|
|
R_SEQ_ADD_S2A3);
|
|
if (err)
|
|
return err;
|
|
}
|
|
if (flags & TWL4030_SLEEP_SCRIPT) {
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
|
|
R_SEQ_ADD_A2S);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
|
|
TWL4030_PM_MASTER_PROTECT_KEY);
|
|
if (err)
|
|
pr_err("TWL4030 Unable to relock registers\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
twl4030_power_configure_scripts(const struct twl4030_power_data *pdata)
|
|
{
|
|
int err;
|
|
int i;
|
|
u8 address = twl4030_start_script_address;
|
|
|
|
for (i = 0; i < pdata->num; i++) {
|
|
err = load_twl4030_script(pdata->scripts[i], address);
|
|
if (err)
|
|
return err;
|
|
address += pdata->scripts[i]->size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
twl4030_power_configure_resources(const struct twl4030_power_data *pdata)
|
|
{
|
|
struct twl4030_resconfig *resconfig = pdata->resource_config;
|
|
int err;
|
|
|
|
if (resconfig) {
|
|
while (resconfig->resource) {
|
|
err = twl4030_configure_resource(resconfig);
|
|
if (err)
|
|
return err;
|
|
resconfig++;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* In master mode, start the power off sequence.
|
|
* After a successful execution, TWL shuts down the power to the SoC
|
|
* and all peripherals connected to it.
|
|
*/
|
|
void twl4030_power_off(void)
|
|
{
|
|
int err;
|
|
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, PWR_DEVOFF,
|
|
TWL4030_PM_MASTER_P1_SW_EVENTS);
|
|
if (err)
|
|
pr_err("TWL4030 Unable to power off\n");
|
|
}
|
|
|
|
static bool twl4030_power_use_poweroff(const struct twl4030_power_data *pdata,
|
|
struct device_node *node)
|
|
{
|
|
if (pdata && pdata->use_poweroff)
|
|
return true;
|
|
|
|
if (of_property_read_bool(node, "ti,use_poweroff"))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
|
|
/* Generic warm reset configuration for omap3 */
|
|
|
|
static struct twl4030_ins omap3_wrst_seq[] = {
|
|
TWL_RESOURCE_OFF(RES_NRES_PWRON),
|
|
TWL_RESOURCE_OFF(RES_RESET),
|
|
TWL_RESOURCE_RESET(RES_MAIN_REF),
|
|
TWL_RESOURCE_GROUP_RESET(RES_GRP_ALL, RES_TYPE_R0, RES_TYPE2_R2),
|
|
TWL_RESOURCE_RESET(RES_VUSB_3V1),
|
|
TWL_RESOURCE_GROUP_RESET(RES_GRP_ALL, RES_TYPE_R0, RES_TYPE2_R1),
|
|
TWL_RESOURCE_GROUP_RESET(RES_GRP_RC, RES_TYPE_ALL, RES_TYPE2_R0),
|
|
TWL_RESOURCE_ON(RES_RESET),
|
|
TWL_RESOURCE_ON(RES_NRES_PWRON),
|
|
};
|
|
|
|
static struct twl4030_script omap3_wrst_script = {
|
|
.script = omap3_wrst_seq,
|
|
.size = ARRAY_SIZE(omap3_wrst_seq),
|
|
.flags = TWL4030_WRST_SCRIPT,
|
|
};
|
|
|
|
static struct twl4030_script *omap3_reset_scripts[] = {
|
|
&omap3_wrst_script,
|
|
};
|
|
|
|
static struct twl4030_resconfig omap3_rconfig[] = {
|
|
TWL_REMAP_SLEEP(RES_HFCLKOUT, DEV_GRP_P3, -1, -1),
|
|
TWL_REMAP_SLEEP(RES_VDD1, DEV_GRP_P1, -1, -1),
|
|
TWL_REMAP_SLEEP(RES_VDD2, DEV_GRP_P1, -1, -1),
|
|
{ 0, 0 },
|
|
};
|
|
|
|
static struct twl4030_power_data omap3_reset = {
|
|
.scripts = omap3_reset_scripts,
|
|
.num = ARRAY_SIZE(omap3_reset_scripts),
|
|
.resource_config = omap3_rconfig,
|
|
};
|
|
|
|
static struct of_device_id twl4030_power_of_match[] = {
|
|
{
|
|
.compatible = "ti,twl4030-power-reset",
|
|
.data = &omap3_reset,
|
|
},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, twl4030_power_of_match);
|
|
#endif /* CONFIG_OF */
|
|
|
|
static int twl4030_power_probe(struct platform_device *pdev)
|
|
{
|
|
const struct twl4030_power_data *pdata = dev_get_platdata(&pdev->dev);
|
|
struct device_node *node = pdev->dev.of_node;
|
|
const struct of_device_id *match;
|
|
int err = 0;
|
|
int err2 = 0;
|
|
u8 val;
|
|
|
|
if (!pdata && !node) {
|
|
dev_err(&pdev->dev, "Platform data is missing\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
|
|
TWL4030_PM_MASTER_PROTECT_KEY);
|
|
err |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
|
|
TWL4030_PM_MASTER_KEY_CFG2,
|
|
TWL4030_PM_MASTER_PROTECT_KEY);
|
|
|
|
if (err) {
|
|
pr_err("TWL4030 Unable to unlock registers\n");
|
|
return err;
|
|
}
|
|
|
|
match = of_match_device(of_match_ptr(twl4030_power_of_match),
|
|
&pdev->dev);
|
|
if (match && match->data)
|
|
pdata = match->data;
|
|
|
|
if (pdata) {
|
|
err = twl4030_power_configure_scripts(pdata);
|
|
if (err) {
|
|
pr_err("TWL4030 failed to load scripts\n");
|
|
goto relock;
|
|
}
|
|
err = twl4030_power_configure_resources(pdata);
|
|
if (err) {
|
|
pr_err("TWL4030 failed to configure resource\n");
|
|
goto relock;
|
|
}
|
|
}
|
|
|
|
/* Board has to be wired properly to use this feature */
|
|
if (twl4030_power_use_poweroff(pdata, node) && !pm_power_off) {
|
|
/* Default for SEQ_OFFSYNC is set, lets ensure this */
|
|
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
|
|
TWL4030_PM_MASTER_CFG_P123_TRANSITION);
|
|
if (err) {
|
|
pr_warning("TWL4030 Unable to read registers\n");
|
|
|
|
} else if (!(val & SEQ_OFFSYNC)) {
|
|
val |= SEQ_OFFSYNC;
|
|
err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
|
|
TWL4030_PM_MASTER_CFG_P123_TRANSITION);
|
|
if (err) {
|
|
pr_err("TWL4030 Unable to setup SEQ_OFFSYNC\n");
|
|
goto relock;
|
|
}
|
|
}
|
|
|
|
pm_power_off = twl4030_power_off;
|
|
}
|
|
|
|
relock:
|
|
err2 = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
|
|
TWL4030_PM_MASTER_PROTECT_KEY);
|
|
if (err2) {
|
|
pr_err("TWL4030 Unable to relock registers\n");
|
|
return err2;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int twl4030_power_remove(struct platform_device *pdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver twl4030_power_driver = {
|
|
.driver = {
|
|
.name = "twl4030_power",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(twl4030_power_of_match),
|
|
},
|
|
.probe = twl4030_power_probe,
|
|
.remove = twl4030_power_remove,
|
|
};
|
|
|
|
module_platform_driver(twl4030_power_driver);
|
|
|
|
MODULE_AUTHOR("Nokia Corporation");
|
|
MODULE_AUTHOR("Texas Instruments, Inc.");
|
|
MODULE_DESCRIPTION("Power management for TWL4030");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:twl4030_power");
|