| Paul Walmsley | 81b34fb | 2010-02-22 22:09:22 -0700 | [diff] [blame] | 1 | /* |
| 2 | * clock2430.c - OMAP2430-specific clock integration code |
| 3 | * |
| 4 | * Copyright (C) 2005-2008 Texas Instruments, Inc. |
| 5 | * Copyright (C) 2004-2010 Nokia Corporation |
| 6 | * |
| 7 | * Contacts: |
| 8 | * Richard Woodruff <r-woodruff2@ti.com> |
| 9 | * Paul Walmsley |
| 10 | * |
| 11 | * Based on earlier work by Tuukka Tikkanen, Tony Lindgren, |
| 12 | * Gordon McNutt and RidgeRun, Inc. |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License version 2 as |
| 16 | * published by the Free Software Foundation. |
| 17 | */ |
| 18 | #undef DEBUG |
| 19 | |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/clk.h> |
| 22 | #include <linux/io.h> |
| 23 | |
| 24 | #include <plat/clock.h> |
| 25 | |
| 26 | #include "clock.h" |
| 27 | #include "clock2xxx.h" |
| 28 | #include "cm.h" |
| 29 | #include "cm-regbits-24xx.h" |
| 30 | |
| 31 | /** |
| 32 | * omap2430_clk_i2chs_find_idlest - return CM_IDLEST info for 2430 I2CHS |
| 33 | * @clk: struct clk * being enabled |
| 34 | * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into |
| 35 | * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into |
| 36 | * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator |
| 37 | * |
| 38 | * OMAP2430 I2CHS CM_IDLEST bits are in CM_IDLEST1_CORE, but the |
| 39 | * CM_*CLKEN bits are in CM_{I,F}CLKEN2_CORE. This custom function |
| 40 | * passes back the correct CM_IDLEST register address for I2CHS |
| 41 | * modules. No return value. |
| 42 | */ |
| 43 | static void omap2430_clk_i2chs_find_idlest(struct clk *clk, |
| 44 | void __iomem **idlest_reg, |
| 45 | u8 *idlest_bit, |
| 46 | u8 *idlest_val) |
| 47 | { |
| 48 | *idlest_reg = OMAP2430_CM_REGADDR(CORE_MOD, CM_IDLEST); |
| 49 | *idlest_bit = clk->enable_bit; |
| 50 | *idlest_val = OMAP24XX_CM_IDLEST_VAL; |
| 51 | } |
| 52 | |
| 53 | /* 2430 I2CHS has non-standard IDLEST register */ |
| 54 | const struct clkops clkops_omap2430_i2chs_wait = { |
| 55 | .enable = omap2_dflt_clk_enable, |
| 56 | .disable = omap2_dflt_clk_disable, |
| 57 | .find_idlest = omap2430_clk_i2chs_find_idlest, |
| 58 | .find_companion = omap2_clk_dflt_find_companion, |
| 59 | }; |