| Rajendra Nayak | f327e07 | 2010-12-21 20:01:18 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * OMAP2 and OMAP3 powerdomain control |
| 3 | * |
| 4 | * Copyright (C) 2009-2010 Texas Instruments, Inc. |
| 5 | * Copyright (C) 2007-2009 Nokia Corporation |
| 6 | * |
| 7 | * Derived from mach-omap2/powerdomain.c written by Paul Walmsley |
| 8 | * Rajendra Nayak <rnayak@ti.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/io.h> |
| 16 | #include <linux/errno.h> |
| 17 | #include <linux/delay.h> |
| 18 | #include <plat/prcm.h> |
| 19 | #include "prm.h" |
| 20 | #include "prm-regbits-34xx.h" |
| 21 | #include "powerdomains.h" |
| 22 | |
| 23 | /* Common functions across OMAP2 and OMAP3 */ |
| 24 | static int omap2_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) |
| 25 | { |
| 26 | prm_rmw_mod_reg_bits(OMAP_POWERSTATE_MASK, |
| 27 | (pwrst << OMAP_POWERSTATE_SHIFT), |
| 28 | pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL); |
| 29 | return 0; |
| 30 | } |
| 31 | |
| 32 | static int omap2_pwrdm_read_next_pwrst(struct powerdomain *pwrdm) |
| 33 | { |
| 34 | return prm_read_mod_bits_shift(pwrdm->prcm_offs, |
| 35 | OMAP2_PM_PWSTCTRL, OMAP_POWERSTATE_MASK); |
| 36 | } |
| 37 | |
| 38 | static int omap2_pwrdm_read_pwrst(struct powerdomain *pwrdm) |
| 39 | { |
| 40 | return prm_read_mod_bits_shift(pwrdm->prcm_offs, |
| 41 | OMAP2_PM_PWSTST, OMAP_POWERSTATEST_MASK); |
| 42 | } |
| 43 | |
| 44 | /* Applicable only for OMAP3. Not supported on OMAP2 */ |
| 45 | static int omap3_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) |
| 46 | { |
| 47 | return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST, |
| 48 | OMAP3430_LASTPOWERSTATEENTERED_MASK); |
| 49 | } |
| 50 | |
| 51 | struct pwrdm_ops omap2_pwrdm_operations = { |
| 52 | .pwrdm_set_next_pwrst = omap2_pwrdm_set_next_pwrst, |
| 53 | .pwrdm_read_next_pwrst = omap2_pwrdm_read_next_pwrst, |
| 54 | .pwrdm_read_pwrst = omap2_pwrdm_read_pwrst, |
| 55 | }; |
| 56 | |
| 57 | struct pwrdm_ops omap3_pwrdm_operations = { |
| 58 | .pwrdm_set_next_pwrst = omap2_pwrdm_set_next_pwrst, |
| 59 | .pwrdm_read_next_pwrst = omap2_pwrdm_read_next_pwrst, |
| 60 | .pwrdm_read_pwrst = omap2_pwrdm_read_pwrst, |
| 61 | .pwrdm_read_prev_pwrst = omap3_pwrdm_read_prev_pwrst, |
| 62 | }; |