| /* |
| * OMAP3-specific clock framework functions |
| * |
| * Copyright (C) 2007-2008 Texas Instruments, Inc. |
| * Copyright (C) 2007-2011 Nokia Corporation |
| * |
| * Paul Walmsley |
| * Jouni Högander |
| * |
| * Parts of this code are based on code written by |
| * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu, |
| * Russell King |
| * |
| * 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. |
| */ |
| #undef DEBUG |
| |
| #include <linux/kernel.h> |
| #include <linux/clk.h> |
| #include <linux/io.h> |
| |
| #include "clock.h" |
| #include "clock34xx.h" |
| #include "cm2xxx_3xxx.h" |
| #include "cm-regbits-34xx.h" |
| |
| /** |
| * omap3430es2_clk_ssi_find_idlest - return CM_IDLEST info for SSI |
| * @clk: struct clk * being enabled |
| * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into |
| * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into |
| * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator |
| * |
| * The OMAP3430ES2 SSI target CM_IDLEST bit is at a different shift |
| * from the CM_{I,F}CLKEN bit. Pass back the correct info via |
| * @idlest_reg and @idlest_bit. No return value. |
| */ |
| static void omap3430es2_clk_ssi_find_idlest(struct clk *clk, |
| void __iomem **idlest_reg, |
| u8 *idlest_bit, |
| u8 *idlest_val) |
| { |
| u32 r; |
| |
| r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); |
| *idlest_reg = (__force void __iomem *)r; |
| *idlest_bit = OMAP3430ES2_ST_SSI_IDLE_SHIFT; |
| *idlest_val = OMAP34XX_CM_IDLEST_VAL; |
| } |
| |
| const struct clkops clkops_omap3430es2_ssi_wait = { |
| .enable = omap2_dflt_clk_enable, |
| .disable = omap2_dflt_clk_disable, |
| .find_idlest = omap3430es2_clk_ssi_find_idlest, |
| .find_companion = omap2_clk_dflt_find_companion, |
| }; |
| |
| const struct clkops clkops_omap3430es2_iclk_ssi_wait = { |
| .enable = omap2_dflt_clk_enable, |
| .disable = omap2_dflt_clk_disable, |
| .find_idlest = omap3430es2_clk_ssi_find_idlest, |
| .find_companion = omap2_clk_dflt_find_companion, |
| .allow_idle = omap2_clkt_iclk_allow_idle, |
| .deny_idle = omap2_clkt_iclk_deny_idle, |
| }; |
| |
| /** |
| * omap3430es2_clk_dss_usbhost_find_idlest - CM_IDLEST info for DSS, USBHOST |
| * @clk: struct clk * being enabled |
| * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into |
| * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into |
| * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator |
| * |
| * Some OMAP modules on OMAP3 ES2+ chips have both initiator and |
| * target IDLEST bits. For our purposes, we are concerned with the |
| * target IDLEST bits, which exist at a different bit position than |
| * the *CLKEN bit position for these modules (DSS and USBHOST) (The |
| * default find_idlest code assumes that they are at the same |
| * position.) No return value. |
| */ |
| static void omap3430es2_clk_dss_usbhost_find_idlest(struct clk *clk, |
| void __iomem **idlest_reg, |
| u8 *idlest_bit, |
| u8 *idlest_val) |
| { |
| u32 r; |
| |
| r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); |
| *idlest_reg = (__force void __iomem *)r; |
| /* USBHOST_IDLE has same shift */ |
| *idlest_bit = OMAP3430ES2_ST_DSS_IDLE_SHIFT; |
| *idlest_val = OMAP34XX_CM_IDLEST_VAL; |
| } |
| |
| const struct clkops clkops_omap3430es2_dss_usbhost_wait = { |
| .enable = omap2_dflt_clk_enable, |
| .disable = omap2_dflt_clk_disable, |
| .find_idlest = omap3430es2_clk_dss_usbhost_find_idlest, |
| .find_companion = omap2_clk_dflt_find_companion, |
| }; |
| |
| const struct clkops clkops_omap3430es2_iclk_dss_usbhost_wait = { |
| .enable = omap2_dflt_clk_enable, |
| .disable = omap2_dflt_clk_disable, |
| .find_idlest = omap3430es2_clk_dss_usbhost_find_idlest, |
| .find_companion = omap2_clk_dflt_find_companion, |
| .allow_idle = omap2_clkt_iclk_allow_idle, |
| .deny_idle = omap2_clkt_iclk_deny_idle, |
| }; |
| |
| /** |
| * omap3430es2_clk_hsotgusb_find_idlest - return CM_IDLEST info for HSOTGUSB |
| * @clk: struct clk * being enabled |
| * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into |
| * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into |
| * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator |
| * |
| * The OMAP3430ES2 HSOTGUSB target CM_IDLEST bit is at a different |
| * shift from the CM_{I,F}CLKEN bit. Pass back the correct info via |
| * @idlest_reg and @idlest_bit. No return value. |
| */ |
| static void omap3430es2_clk_hsotgusb_find_idlest(struct clk *clk, |
| void __iomem **idlest_reg, |
| u8 *idlest_bit, |
| u8 *idlest_val) |
| { |
| u32 r; |
| |
| r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); |
| *idlest_reg = (__force void __iomem *)r; |
| *idlest_bit = OMAP3430ES2_ST_HSOTGUSB_IDLE_SHIFT; |
| *idlest_val = OMAP34XX_CM_IDLEST_VAL; |
| } |
| |
| const struct clkops clkops_omap3430es2_hsotgusb_wait = { |
| .enable = omap2_dflt_clk_enable, |
| .disable = omap2_dflt_clk_disable, |
| .find_idlest = omap3430es2_clk_hsotgusb_find_idlest, |
| .find_companion = omap2_clk_dflt_find_companion, |
| }; |
| |
| const struct clkops clkops_omap3430es2_iclk_hsotgusb_wait = { |
| .enable = omap2_dflt_clk_enable, |
| .disable = omap2_dflt_clk_disable, |
| .find_idlest = omap3430es2_clk_hsotgusb_find_idlest, |
| .find_companion = omap2_clk_dflt_find_companion, |
| .allow_idle = omap2_clkt_iclk_allow_idle, |
| .deny_idle = omap2_clkt_iclk_deny_idle, |
| }; |