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An OMAP clock cleanup series for 3.17 from Tero Kristo.

Browse Source 
This is in preparation for moving this code into drivers/clk/ti.
 
 Basic build, boot, and PM test logs are here:
 
 http://www.pwsan.com/omap/testlogs/clock-a-v3.17/20140717034329/
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Merge tag 'for-v3.17/omap-clock-a' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v3.17/soc

An OMAP clock cleanup series for 3.17 from Tero Kristo.
This is in preparation for moving this code into drivers/clk/ti.

Basic build, boot, and PM test logs are here:

http://www.pwsan.com/omap/testlogs/clock-a-v3.17/20140717034329/
This commit is contained in:
Tony Lindgren 2014-07-21 00:35:38 -07:00
commit 3db53918e3
7 changed files with 154 additions and 100 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

98
arch/arm/mach-omap2/clkt_dpll.c
View File

@ -21,10 +21,7 @@
#include <asm/div64.h>
#include "soc.h"
#include "clock.h"
#include "cm-regbits-24xx.h"
#include "cm-regbits-34xx.h"
/* DPLL rate rounding: minimum DPLL multiplier, divider values */
#define DPLL_MIN_MULTIPLIER 2
@ -44,20 +41,12 @@
#define DPLL_ROUNDING_VAL ((DPLL_SCALE_BASE / 2) * \
(DPLL_SCALE_FACTOR / DPLL_SCALE_BASE))
/* DPLL valid Fint frequency band limits - from 34xx TRM Section 4.7.6.2 */
#define OMAP3430_DPLL_FINT_BAND1_MIN 750000
#define OMAP3430_DPLL_FINT_BAND1_MAX 2100000
#define OMAP3430_DPLL_FINT_BAND2_MIN 7500000
#define OMAP3430_DPLL_FINT_BAND2_MAX 21000000
/*
* DPLL valid Fint frequency range for OMAP36xx and OMAP4xxx.
* From device data manual section 4.3 "DPLL and DLL Specifications".
*/
#define OMAP3PLUS_DPLL_FINT_JTYPE_MIN 500000
#define OMAP3PLUS_DPLL_FINT_JTYPE_MAX 2500000
#define OMAP3PLUS_DPLL_FINT_MIN 32000
#define OMAP3PLUS_DPLL_FINT_MAX 52000000
/* _dpll_test_fint() return codes */
#define DPLL_FINT_UNDERFLOW -1
@ -87,33 +76,31 @@ static int _dpll_test_fint(struct clk_hw_omap *clk, u8 n)
/* DPLL divider must result in a valid jitter correction val */
fint = __clk_get_rate(__clk_get_parent(clk->hw.clk)) / n;
if (cpu_is_omap24xx()) {
/* Should not be called for OMAP2, so warn if it is called */
WARN(1, "No fint limits available for OMAP2!\n");
return DPLL_FINT_INVALID;
} else if (cpu_is_omap3430()) {
fint_min = OMAP3430_DPLL_FINT_BAND1_MIN;
fint_max = OMAP3430_DPLL_FINT_BAND2_MAX;
} else if (dd->flags & DPLL_J_TYPE) {
if (dd->flags & DPLL_J_TYPE) {
fint_min = OMAP3PLUS_DPLL_FINT_JTYPE_MIN;
fint_max = OMAP3PLUS_DPLL_FINT_JTYPE_MAX;
} else {
fint_min = OMAP3PLUS_DPLL_FINT_MIN;
fint_max = OMAP3PLUS_DPLL_FINT_MAX;
fint_min = ti_clk_features.fint_min;
fint_max = ti_clk_features.fint_max;
}
if (fint < fint_min) {
if (!fint_min || !fint_max) {
WARN(1, "No fint limits available!\n");
return DPLL_FINT_INVALID;
}
if (fint < ti_clk_features.fint_min) {
pr_debug("rejecting n=%d due to Fint failure, lowering max_divider\n",
n);
dd->max_divider = n;
ret = DPLL_FINT_UNDERFLOW;
} else if (fint > fint_max) {
} else if (fint > ti_clk_features.fint_max) {
pr_debug("rejecting n=%d due to Fint failure, boosting min_divider\n",
n);
dd->min_divider = n;
ret = DPLL_FINT_INVALID;
} else if (cpu_is_omap3430() && fint > OMAP3430_DPLL_FINT_BAND1_MAX &&
fint < OMAP3430_DPLL_FINT_BAND2_MIN) {
} else if (fint > ti_clk_features.fint_band1_max &&
fint < ti_clk_features.fint_band2_min) {
pr_debug("rejecting n=%d due to Fint failure\n", n);
ret = DPLL_FINT_INVALID;
}
@ -185,6 +172,34 @@ static int _dpll_test_mult(int *m, int n, unsigned long *new_rate,
return r;
}
/**
* _omap2_dpll_is_in_bypass - check if DPLL is in bypass mode or not
* @v: bitfield value of the DPLL enable
*
* Checks given DPLL enable bitfield to see whether the DPLL is in bypass
* mode or not. Returns 1 if the DPLL is in bypass, 0 otherwise.
*/
static int _omap2_dpll_is_in_bypass(u32 v)
{
u8 mask, val;
mask = ti_clk_features.dpll_bypass_vals;
/*
* Each set bit in the mask corresponds to a bypass value equal
* to the bitshift. Go through each set-bit in the mask and
* compare against the given register value.
*/
while (mask) {
val = __ffs(mask);
mask ^= (1 << val);
if (v == val)
return 1;
}
return 0;
}
/* Public functions */
u8 omap2_init_dpll_parent(struct clk_hw *hw)
{
@ -201,20 +216,9 @@ u8 omap2_init_dpll_parent(struct clk_hw *hw)
v >>= __ffs(dd->enable_mask);
/* Reparent the struct clk in case the dpll is in bypass */
if (cpu_is_omap24xx()) {
if (v == OMAP2XXX_EN_DPLL_LPBYPASS ||
v == OMAP2XXX_EN_DPLL_FRBYPASS)
return 1;
} else if (cpu_is_omap34xx()) {
if (v == OMAP3XXX_EN_DPLL_LPBYPASS ||
v == OMAP3XXX_EN_DPLL_FRBYPASS)
return 1;
} else if (soc_is_am33xx() || cpu_is_omap44xx() || soc_is_am43xx()) {
if (v == OMAP4XXX_EN_DPLL_LPBYPASS ||
v == OMAP4XXX_EN_DPLL_FRBYPASS ||
v == OMAP4XXX_EN_DPLL_MNBYPASS)
return 1;
}
if (_omap2_dpll_is_in_bypass(v))
return 1;
return 0;
}
@ -247,20 +251,8 @@ unsigned long omap2_get_dpll_rate(struct clk_hw_omap *clk)
v &= dd->enable_mask;
v >>= __ffs(dd->enable_mask);
if (cpu_is_omap24xx()) {
if (v == OMAP2XXX_EN_DPLL_LPBYPASS ||
v == OMAP2XXX_EN_DPLL_FRBYPASS)
return __clk_get_rate(dd->clk_bypass);
} else if (cpu_is_omap34xx()) {
if (v == OMAP3XXX_EN_DPLL_LPBYPASS ||
v == OMAP3XXX_EN_DPLL_FRBYPASS)
return __clk_get_rate(dd->clk_bypass);
} else if (soc_is_am33xx() || cpu_is_omap44xx() || soc_is_am43xx()) {
if (v == OMAP4XXX_EN_DPLL_LPBYPASS ||
v == OMAP4XXX_EN_DPLL_FRBYPASS ||
v == OMAP4XXX_EN_DPLL_MNBYPASS)
return __clk_get_rate(dd->clk_bypass);
}
if (_omap2_dpll_is_in_bypass(v))
return __clk_get_rate(dd->clk_bypass);
v = omap2_clk_readl(clk, dd->mult_div1_reg);
dpll_mult = v & dd->mult_mask;

8
arch/arm/mach-omap2/clkt_iclk.c
View File

@ -14,11 +14,11 @@
#include <linux/clk-provider.h>
#include <linux/io.h>
#include "clock.h"
#include "clock2xxx.h"
#include "cm2xxx_3xxx.h"
#include "cm-regbits-24xx.h"
/* Register offsets */
#define CM_AUTOIDLE 0x30
#define CM_ICLKEN 0x10
/* Private functions */

76
arch/arm/mach-omap2/clock.c
View File

@ -46,6 +46,24 @@
u16 cpu_mask;
/*
* Clock features setup. Used instead of CPU type checks.
*/
struct ti_clk_features ti_clk_features;
/* DPLL valid Fint frequency band limits - from 34xx TRM Section 4.7.6.2 */
#define OMAP3430_DPLL_FINT_BAND1_MIN 750000
#define OMAP3430_DPLL_FINT_BAND1_MAX 2100000
#define OMAP3430_DPLL_FINT_BAND2_MIN 7500000
#define OMAP3430_DPLL_FINT_BAND2_MAX 21000000
/*
* DPLL valid Fint frequency range for OMAP36xx and OMAP4xxx.
* From device data manual section 4.3 "DPLL and DLL Specifications".
*/
#define OMAP3PLUS_DPLL_FINT_MIN 32000
#define OMAP3PLUS_DPLL_FINT_MAX 52000000
/*
* clkdm_control: if true, then when a clock is enabled in the
* hardware, its clockdomain will first be enabled; and when a clock
@ -287,13 +305,7 @@ void omap2_clk_dflt_find_idlest(struct clk_hw_omap *clk,
* 34xx reverses this, just to keep us on our toes
* AM35xx uses both, depending on the module.
*/
if (cpu_is_omap24xx())
*idlest_val = OMAP24XX_CM_IDLEST_VAL;
else if (cpu_is_omap34xx())
*idlest_val = OMAP34XX_CM_IDLEST_VAL;
else
BUG();
*idlest_val = ti_clk_features.cm_idlest_val;
}
/**
@ -731,3 +743,53 @@ void __init omap2_clk_print_new_rates(const char *hfclkin_ck_name,
(clk_get_rate(core_ck) / 1000000),
(clk_get_rate(mpu_ck) / 1000000));
}
/**
* ti_clk_init_features - init clock features struct for the SoC
*
* Initializes the clock features struct based on the SoC type.
*/
void __init ti_clk_init_features(void)
{
/* Fint setup for DPLLs */
if (cpu_is_omap3430()) {
ti_clk_features.fint_min = OMAP3430_DPLL_FINT_BAND1_MIN;
ti_clk_features.fint_max = OMAP3430_DPLL_FINT_BAND2_MAX;
ti_clk_features.fint_band1_max = OMAP3430_DPLL_FINT_BAND1_MAX;
ti_clk_features.fint_band2_min = OMAP3430_DPLL_FINT_BAND2_MIN;
} else {
ti_clk_features.fint_min = OMAP3PLUS_DPLL_FINT_MIN;
ti_clk_features.fint_max = OMAP3PLUS_DPLL_FINT_MAX;
}
/* Bypass value setup for DPLLs */
if (cpu_is_omap24xx()) {
ti_clk_features.dpll_bypass_vals |=
(1 << OMAP2XXX_EN_DPLL_LPBYPASS) |
(1 << OMAP2XXX_EN_DPLL_FRBYPASS);
} else if (cpu_is_omap34xx()) {
ti_clk_features.dpll_bypass_vals |=
(1 << OMAP3XXX_EN_DPLL_LPBYPASS) |
(1 << OMAP3XXX_EN_DPLL_FRBYPASS);
} else if (soc_is_am33xx() || cpu_is_omap44xx() || soc_is_am43xx() ||
soc_is_omap54xx() || soc_is_dra7xx()) {
ti_clk_features.dpll_bypass_vals |=
(1 << OMAP4XXX_EN_DPLL_LPBYPASS) |
(1 << OMAP4XXX_EN_DPLL_FRBYPASS) |
(1 << OMAP4XXX_EN_DPLL_MNBYPASS);
}
/* Jitter correction only available on OMAP343X */
if (cpu_is_omap343x())
ti_clk_features.flags |= TI_CLK_DPLL_HAS_FREQSEL;
/* Idlest value for interface clocks.
* 24xx uses 0 to indicate not ready, and 1 to indicate ready.
* 34xx reverses this, just to keep us on our toes
* AM35xx uses both, depending on the module.
*/
if (cpu_is_omap24xx())
ti_clk_features.cm_idlest_val = OMAP24XX_CM_IDLEST_VAL;
else if (cpu_is_omap34xx())
ti_clk_features.cm_idlest_val = OMAP34XX_CM_IDLEST_VAL;
}

44
arch/arm/mach-omap2/clock.h
View File

@ -101,31 +101,6 @@ struct clockdomain;
}; \
DEFINE_STRUCT_CLK(_name, _parent_names, _ops);
#define DEFINE_CLK_OMAP_HSDIVIDER(_name, _parent_name, \
_parent_ptr, _flags, \
_clksel_reg, _clksel_mask) \
static const struct clksel _name##_div[] = { \
{ \
.parent = _parent_ptr, \
.rates = div31_1to31_rates \
}, \
{ .parent = NULL }, \
}; \
static struct clk _name; \
static const char *_name##_parent_names[] = { \
_parent_name, \
}; \
static struct clk_hw_omap _name##_hw = { \
.hw = { \
.clk = &_name, \
}, \
.clksel = _name##_div, \
.clksel_reg = _clksel_reg, \
.clksel_mask = _clksel_mask, \
.ops = &clkhwops_omap4_dpllmx, \
}; \
DEFINE_STRUCT_CLK(_name, _name##_parent_names, omap_hsdivider_ops);
/* struct clksel_rate.flags possibilities */
#define RATE_IN_242X (1 << 0)
#define RATE_IN_243X (1 << 1)
@ -248,6 +223,23 @@ void omap2_clk_writel(u32 val, struct clk_hw_omap *clk, void __iomem *reg);
extern u16 cpu_mask;
/*
* Clock features setup. Used instead of CPU type checks.
*/
struct ti_clk_features {
u32 flags;
long fint_min;
long fint_max;
long fint_band1_max;
long fint_band2_min;
u8 dpll_bypass_vals;
u8 cm_idlest_val;
};
#define TI_CLK_DPLL_HAS_FREQSEL (1 << 0)
extern struct ti_clk_features ti_clk_features;
extern const struct clkops clkops_omap2_dflt_wait;
extern const struct clkops clkops_dummy;
extern const struct clkops clkops_omap2_dflt;
@ -286,4 +278,6 @@ extern int omap2_clkops_enable_clkdm(struct clk_hw *hw);
extern void omap2_clkops_disable_clkdm(struct clk_hw *hw);
extern void omap_clocks_register(struct omap_clk *oclks, int cnt);
void __init ti_clk_init_features(void);
#endif

7
arch/arm/mach-omap2/dpll3xxx.c
View File

@ -28,11 +28,8 @@
#include <linux/bitops.h>
#include <linux/clkdev.h>
#include "soc.h"
#include "clockdomain.h"
#include "clock.h"
#include "cm2xxx_3xxx.h"
#include "cm-regbits-34xx.h"
/* CM_AUTOIDLE_PLL*.AUTO_* bit values */
#define DPLL_AUTOIDLE_DISABLE 0x0
@ -310,7 +307,7 @@ static int omap3_noncore_dpll_program(struct clk_hw_omap *clk, u16 freqsel)
* Set jitter correction. Jitter correction applicable for OMAP343X
* only since freqsel field is no longer present on other devices.
*/
if (cpu_is_omap343x()) {
if (ti_clk_features.flags & TI_CLK_DPLL_HAS_FREQSEL) {
v = omap2_clk_readl(clk, dd->control_reg);
v &= ~dd->freqsel_mask;
v |= freqsel << __ffs(dd->freqsel_mask);
@ -512,7 +509,7 @@ int omap3_noncore_dpll_set_rate(struct clk_hw *hw, unsigned long rate,
return -EINVAL;
/* Freqsel is available only on OMAP343X devices */
if (cpu_is_omap343x()) {
if (ti_clk_features.flags & TI_CLK_DPLL_HAS_FREQSEL) {
freqsel = _omap3_dpll_compute_freqsel(clk,
dd->last_rounded_n);
WARN_ON(!freqsel);

19
arch/arm/mach-omap2/dpll44xx.c
View File

@ -15,10 +15,7 @@
#include <linux/io.h>
#include <linux/bitops.h>
#include "soc.h"
#include "clock.h"
#include "clock44xx.h"
#include "cm-regbits-44xx.h"
/*
* Maximum DPLL input frequency (FINT) and output frequency (FOUT) that
@ -29,13 +26,23 @@
#define OMAP4_DPLL_LP_FINT_MAX 1000000
#define OMAP4_DPLL_LP_FOUT_MAX 100000000
/*
* Bitfield declarations
*/
#define OMAP4430_DPLL_CLKOUT_GATE_CTRL_MASK (1 << 8)
#define OMAP4430_DPLL_CLKOUTX2_GATE_CTRL_MASK (1 << 10)
#define OMAP4430_DPLL_REGM4XEN_MASK (1 << 11)
/* Static rate multiplier for OMAP4 REGM4XEN clocks */
#define OMAP4430_REGM4XEN_MULT 4
/* Supported only on OMAP4 */
int omap4_dpllmx_gatectrl_read(struct clk_hw_omap *clk)
{
u32 v;
u32 mask;
if (!clk || !clk->clksel_reg || !cpu_is_omap44xx())
if (!clk || !clk->clksel_reg)
return -EINVAL;
mask = clk->flags & CLOCK_CLKOUTX2 ?
@ -54,7 +61,7 @@ void omap4_dpllmx_allow_gatectrl(struct clk_hw_omap *clk)
u32 v;
u32 mask;
if (!clk || !clk->clksel_reg || !cpu_is_omap44xx())
if (!clk || !clk->clksel_reg)
return;
mask = clk->flags & CLOCK_CLKOUTX2 ?
@ -72,7 +79,7 @@ void omap4_dpllmx_deny_gatectrl(struct clk_hw_omap *clk)
u32 v;
u32 mask;
if (!clk || !clk->clksel_reg || !cpu_is_omap44xx())
if (!clk || !clk->clksel_reg)
return;
mask = clk->flags & CLOCK_CLKOUTX2 ?

2
arch/arm/mach-omap2/io.c
View File

@ -728,6 +728,8 @@ int __init omap_clk_init(void)
if (!omap_clk_soc_init)
return 0;
ti_clk_init_features();
ret = of_prcm_init();
if (!ret)
ret = omap_clk_soc_init();