Paul Walmsley | 87a1b26 | 2010-01-26 20:13:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * OMAP2xxx osc_clk-specific clock 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/module.h> |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/errno.h> |
| 23 | #include <linux/clk.h> |
| 24 | #include <linux/io.h> |
| 25 | |
| 26 | #include <plat/clock.h> |
| 27 | |
| 28 | #include "clock.h" |
| 29 | #include "clock2xxx.h" |
| 30 | #include "prm.h" |
| 31 | #include "prm-regbits-24xx.h" |
| 32 | |
| 33 | static int omap2_enable_osc_ck(struct clk *clk) |
| 34 | { |
| 35 | u32 pcc; |
| 36 | |
| 37 | pcc = __raw_readl(prcm_clksrc_ctrl); |
| 38 | |
| 39 | __raw_writel(pcc & ~OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); |
| 40 | |
| 41 | return 0; |
| 42 | } |
| 43 | |
| 44 | static void omap2_disable_osc_ck(struct clk *clk) |
| 45 | { |
| 46 | u32 pcc; |
| 47 | |
| 48 | pcc = __raw_readl(prcm_clksrc_ctrl); |
| 49 | |
| 50 | __raw_writel(pcc | OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); |
| 51 | } |
| 52 | |
| 53 | const struct clkops clkops_oscck = { |
| 54 | .enable = omap2_enable_osc_ck, |
| 55 | .disable = omap2_disable_osc_ck, |
| 56 | }; |
| 57 | |
| 58 | unsigned long omap2_osc_clk_recalc(struct clk *clk) |
| 59 | { |
| 60 | return omap2xxx_get_apll_clkin() * omap2xxx_get_sysclkdiv(); |
| 61 | } |
| 62 | |