OMAP3/4 clock: split into per-chip family files

clock34xx_data.c now contains data for the OMAP34xx family, the
OMAP36xx family, and the OMAP3517 family, so rename it to
clock3xxx_data.c.  Rename clock34xx.c to clock3xxx.c, and move the
chip family-specific clock functions to clock34xx.c, clock36xx.c, or
clock3517.c, as appropriate.  So now "clock3xxx.*" refers to the OMAP3
superset.

The main goal here is to prepare to compile chip family-specific clock
functions only for kernel builds that target that chip family.  To get to
that point, we also need to add CONFIG_SOC_* options for those other
chip families; that will be done in future patches, planned for 2.6.35.

OMAP4 is also affected by this.  It duplicated the OMAP3 non-CORE DPLL
clkops structure.  The OMAP4 variant of this clkops structure has been
removed, and since there was nothing else currently in clock44xx.c, it
too has been removed -- it can always be added back later when there
is some content for it.  (The OMAP4 clock autogeneration scripts have been
updated accordingly.)

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Ranjith Lohithakshan <ranjithl@ti.com>
Cc: Tony Lindgren <tony@atomide.com>

1 files changed, 2 insertions, 258 deletions

diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c
index 9039e8c..6febd5f 100644
--- a/arch/arm/mach-omap2/clock34xx.c
+++ b/arch/arm/mach-omap2/clock34xx.c
@@ -8,7 +8,8 @@
  * Jouni Högander
  *
  * Parts of this code are based on code written by
- * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu
+ * 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
@@ -17,42 +18,16 @@
 #undef DEBUG
 
 #include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/delay.h>
 #include <linux/clk.h>
 #include <linux/io.h>
-#include <linux/err.h>
 
-#include <plat/cpu.h>
 #include <plat/clock.h>
 
 #include "clock.h"
 #include "clock34xx.h"
-#include "prm.h"
-#include "prm-regbits-34xx.h"
 #include "cm.h"
 #include "cm-regbits-34xx.h"
 
-/*
- * DPLL5_FREQ_FOR_USBHOST: USBHOST and USBTLL are the only clocks
- * that are sourced by DPLL5, and both of these require this clock
- * to be at 120 MHz for proper operation.
- */
-#define DPLL5_FREQ_FOR_USBHOST		120000000
-
-/*
- * In AM35xx IPSS, the {ICK,FCK} enable bits for modules are exported
- * in the same register at a bit offset of 0x8. The EN_ACK for ICK is
- * at an offset of 4 from ICK enable bit.
- */
-#define AM35XX_IPSS_ICK_MASK			0xF
-#define AM35XX_IPSS_ICK_EN_ACK_OFFSET 	0x4
-#define AM35XX_IPSS_ICK_FCK_OFFSET		0x8
-#define AM35XX_IPSS_CLK_IDLEST_VAL		0
-
-/* needed by omap3_core_dpll_m2_set_rate() */
-struct clk *sdrc_ick_p, *arm_fck_p;
-
 /**
  * omap3430es2_clk_ssi_find_idlest - return CM_IDLEST info for SSI
  * @clk: struct clk * being enabled
@@ -149,234 +124,3 @@ const struct clkops clkops_omap3430es2_hsotgusb_wait = {
 	.find_idlest	= omap3430es2_clk_hsotgusb_find_idlest,
 	.find_companion = omap2_clk_dflt_find_companion,
 };
-
-/**
- * omap36xx_pwrdn_clk_enable_with_hsdiv_restore - enable clocks suffering
- *         from HSDivider PWRDN problem Implements Errata ID: i556.
- * @clk: DPLL output struct clk
- *
- * 3630 only: dpll3_m3_ck, dpll4_m2_ck, dpll4_m3_ck, dpll4_m4_ck,
- * dpll4_m5_ck & dpll4_m6_ck dividers gets loaded with reset
- * valueafter their respective PWRDN bits are set.  Any dummy write
- * (Any other value different from the Read value) to the
- * corresponding CM_CLKSEL register will refresh the dividers.
- */
-static int omap36xx_pwrdn_clk_enable_with_hsdiv_restore(struct clk *clk)
-{
-	u32 dummy_v, orig_v, clksel_shift;
-	int ret;
-
-	/* Clear PWRDN bit of HSDIVIDER */
-	ret = omap2_dflt_clk_enable(clk);
-
-	/* Restore the dividers */
-	if (!ret) {
-		clksel_shift = __ffs(clk->parent->clksel_mask);
-		orig_v = __raw_readl(clk->parent->clksel_reg);
-		dummy_v = orig_v;
-
-		/* Write any other value different from the Read value */
-		dummy_v ^= (1 << clksel_shift);
-		__raw_writel(dummy_v, clk->parent->clksel_reg);
-
-		/* Write the original divider */
-		__raw_writel(orig_v, clk->parent->clksel_reg);
-	}
-
-	return ret;
-}
-
-const struct clkops clkops_omap36xx_pwrdn_with_hsdiv_wait_restore = {
-	.enable		= omap36xx_pwrdn_clk_enable_with_hsdiv_restore,
-	.disable	= omap2_dflt_clk_disable,
-	.find_companion	= omap2_clk_dflt_find_companion,
-	.find_idlest	= omap2_clk_dflt_find_idlest,
-};
-
-const struct clkops omap3_clkops_noncore_dpll_ops = {
-	.enable		= omap3_noncore_dpll_enable,
-	.disable	= omap3_noncore_dpll_disable,
-};
-
-/**
- * am35xx_clk_find_idlest - return clock ACK info for AM35XX IPSS
- * @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 interface clocks on AM35xx IPSS reflects the clock idle status
- * in the enable register itsel at a bit offset of 4 from the enable
- * bit. A value of 1 indicates that clock is enabled.
- */
-static void am35xx_clk_find_idlest(struct clk *clk,
-					    void __iomem **idlest_reg,
-					    u8 *idlest_bit,
-					    u8 *idlest_val)
-{
-	*idlest_reg = (__force void __iomem *)(clk->enable_reg);
-	*idlest_bit = clk->enable_bit + AM35XX_IPSS_ICK_EN_ACK_OFFSET;
-	*idlest_val = AM35XX_IPSS_CLK_IDLEST_VAL;
-}
-
-/**
- * am35xx_clk_find_companion - find companion clock to @clk
- * @clk: struct clk * to find the companion clock of
- * @other_reg: void __iomem ** to return the companion clock CM_*CLKEN va in
- * @other_bit: u8 ** to return the companion clock bit shift in
- *
- * Some clocks don't have companion clocks.  For example, modules with
- * only an interface clock (such as HECC) don't have a companion
- * clock.  Right now, this code relies on the hardware exporting a bit
- * in the correct companion register that indicates that the
- * nonexistent 'companion clock' is active.  Future patches will
- * associate this type of code with per-module data structures to
- * avoid this issue, and remove the casts.  No return value.
- */
-static void am35xx_clk_find_companion(struct clk *clk, void __iomem **other_reg,
-					    u8 *other_bit)
-{
-	*other_reg = (__force void __iomem *)(clk->enable_reg);
-	if (clk->enable_bit & AM35XX_IPSS_ICK_MASK)
-		*other_bit = clk->enable_bit + AM35XX_IPSS_ICK_FCK_OFFSET;
-	else
-		*other_bit = clk->enable_bit - AM35XX_IPSS_ICK_FCK_OFFSET;
-}
-
-const struct clkops clkops_am35xx_ipss_module_wait = {
-	.enable		= omap2_dflt_clk_enable,
-	.disable	= omap2_dflt_clk_disable,
-	.find_idlest	= am35xx_clk_find_idlest,
-	.find_companion	= am35xx_clk_find_companion,
-};
-
-/**
- * am35xx_clk_ipss_find_idlest - return CM_IDLEST info for IPSS
- * @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 IPSS 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 am35xx_clk_ipss_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 = AM35XX_ST_IPSS_SHIFT;
-	*idlest_val = OMAP34XX_CM_IDLEST_VAL;
-}
-
-const struct clkops clkops_am35xx_ipss_wait = {
-	.enable		= omap2_dflt_clk_enable,
-	.disable	= omap2_dflt_clk_disable,
-	.find_idlest	= am35xx_clk_ipss_find_idlest,
-	.find_companion	= omap2_clk_dflt_find_companion,
-};
-
-int omap3_dpll4_set_rate(struct clk *clk, unsigned long rate)
-{
-	/*
-	 * According to the 12-5 CDP code from TI, "Limitation 2.5"
-	 * on 3430ES1 prevents us from changing DPLL multipliers or dividers
-	 * on DPLL4.
-	 */
-	if (omap_rev() == OMAP3430_REV_ES1_0) {
-		printk(KERN_ERR "clock: DPLL4 cannot change rate due to "
-		       "silicon 'Limitation 2.5' on 3430ES1.\n");
-		return -EINVAL;
-	}
-	return omap3_noncore_dpll_set_rate(clk, rate);
-}
-
-void __init omap3_clk_lock_dpll5(void)
-{
-	struct clk *dpll5_clk;
-	struct clk *dpll5_m2_clk;
-
-	dpll5_clk = clk_get(NULL, "dpll5_ck");
-	clk_set_rate(dpll5_clk, DPLL5_FREQ_FOR_USBHOST);
-	clk_enable(dpll5_clk);
-
-	/* Enable autoidle to allow it to enter low power bypass */
-	omap3_dpll_allow_idle(dpll5_clk);
-
-	/* Program dpll5_m2_clk divider for no division */
-	dpll5_m2_clk = clk_get(NULL, "dpll5_m2_ck");
-	clk_enable(dpll5_m2_clk);
-	clk_set_rate(dpll5_m2_clk, DPLL5_FREQ_FOR_USBHOST);
-
-	clk_disable(dpll5_m2_clk);
-	clk_disable(dpll5_clk);
-	return;
-}
-
-/* Common clock code */
-
-/* REVISIT: Move this init stuff out into clock.c */
-
-/*
- * Switch the MPU rate if specified on cmdline.
- * We cannot do this early until cmdline is parsed.
- */
-static int __init omap3xxx_clk_arch_init(void)
-{
-	struct clk *osc_sys_ck, *dpll1_ck, *arm_fck, *core_ck;
-	unsigned long osc_sys_rate;
-	bool err = 0;
-
-	if (!cpu_is_omap34xx())
-		return 0;
-
-	if (!mpurate)
-		return -EINVAL;
-
-	/* XXX test these for success */
-	dpll1_ck = clk_get(NULL, "dpll1_ck");
-	if (WARN(IS_ERR(dpll1_ck), "Failed to get dpll1_ck.\n"))
-		err = 1;
-
-	arm_fck = clk_get(NULL, "arm_fck");
-	if (WARN(IS_ERR(arm_fck), "Failed to get arm_fck.\n"))
-		err = 1;
-
-	core_ck = clk_get(NULL, "core_ck");
-	if (WARN(IS_ERR(core_ck), "Failed to get core_ck.\n"))
-		err = 1;
-
-	osc_sys_ck = clk_get(NULL, "osc_sys_ck");
-	if (WARN(IS_ERR(osc_sys_ck), "Failed to get osc_sys_ck.\n"))
-		err = 1;
-
-	if (err)
-		return -ENOENT;
-
-	/* REVISIT: not yet ready for 343x */
-	if (clk_set_rate(dpll1_ck, mpurate))
-		printk(KERN_ERR "*** Unable to set MPU rate\n");
-
-	recalculate_root_clocks();
-
-	osc_sys_rate = clk_get_rate(osc_sys_ck);
-
-	pr_info("Switched to new clocking rate (Crystal/Core/MPU): "
-		"%ld.%01ld/%ld/%ld MHz\n",
-		(osc_sys_rate / 1000000),
-		((osc_sys_rate / 100000) % 10),
-		(clk_get_rate(core_ck) / 1000000),
-		(clk_get_rate(arm_fck) / 1000000));
-
-	calibrate_delay();
-
-	return 0;
-}
-arch_initcall(omap3xxx_clk_arch_init);
-
-