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ARM: OMAP2+: clock: export driver API to setup/get clock features

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As most of the clock driver support code is going to be moved under
drivers/clk/ti, an API for setting / getting the SoC specific clock
features is needed. This patch provides this API and changes the
existing code to use it.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
This commit is contained in:
Tero Kristo 2015-02-27 17:54:14 +02:00
parent 5ebe6afaf0
commit f3b19aa5ca
7 changed files with 69 additions and 48 deletions
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14
arch/arm/mach-omap2/clkt_dpll.c
View File

@ -80,8 +80,8 @@ static int _dpll_test_fint(struct clk_hw_omap *clk, unsigned int n)
fint_min = OMAP3PLUS_DPLL_FINT_JTYPE_MIN;
fint_max = OMAP3PLUS_DPLL_FINT_JTYPE_MAX;
} else {
fint_min = ti_clk_features.fint_min;
fint_max = ti_clk_features.fint_max;
fint_min = ti_clk_get_features()->fint_min;
fint_max = ti_clk_get_features()->fint_max;
}
if (!fint_min || !fint_max) {
@ -89,18 +89,18 @@ static int _dpll_test_fint(struct clk_hw_omap *clk, unsigned int n)
return DPLL_FINT_INVALID;
}
if (fint < ti_clk_features.fint_min) {
if (fint < ti_clk_get_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 > ti_clk_features.fint_max) {
} else if (fint > ti_clk_get_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 (fint > ti_clk_features.fint_band1_max &&
fint < ti_clk_features.fint_band2_min) {
} else if (fint > ti_clk_get_features()->fint_band1_max &&
fint < ti_clk_get_features()->fint_band2_min) {
pr_debug("rejecting n=%d due to Fint failure\n", n);
ret = DPLL_FINT_INVALID;
}
@ -183,7 +183,7 @@ static int _omap2_dpll_is_in_bypass(u32 v)
{
u8 mask, val;
mask = ti_clk_features.dpll_bypass_vals;
mask = ti_clk_get_features()->dpll_bypass_vals;
/*
* Each set bit in the mask corresponds to a bypass value equal

36
arch/arm/mach-omap2/clock.c
View File

@ -48,11 +48,6 @@
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
@ -367,7 +362,7 @@ 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.
*/
*idlest_val = ti_clk_features.cm_idlest_val;
*idlest_val = ti_clk_get_features()->cm_idlest_val;
}
/**
@ -801,29 +796,30 @@ void __init omap2_clk_print_new_rates(const char *hfclkin_ck_name,
*/
void __init ti_clk_init_features(void)
{
struct ti_clk_features features = { 0 };
/* 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;
features.fint_min = OMAP3430_DPLL_FINT_BAND1_MIN;
features.fint_max = OMAP3430_DPLL_FINT_BAND2_MAX;
features.fint_band1_max = OMAP3430_DPLL_FINT_BAND1_MAX;
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;
features.fint_min = OMAP3PLUS_DPLL_FINT_MIN;
features.fint_max = OMAP3PLUS_DPLL_FINT_MAX;
}
/* Bypass value setup for DPLLs */
if (cpu_is_omap24xx()) {
ti_clk_features.dpll_bypass_vals |=
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 |=
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 |=
features.dpll_bypass_vals |=
(1 << OMAP4XXX_EN_DPLL_LPBYPASS) |
(1 << OMAP4XXX_EN_DPLL_FRBYPASS) |
(1 << OMAP4XXX_EN_DPLL_MNBYPASS);
@ -831,7 +827,7 @@ void __init ti_clk_init_features(void)
/* Jitter correction only available on OMAP343X */
if (cpu_is_omap343x())
ti_clk_features.flags |= TI_CLK_DPLL_HAS_FREQSEL;
features.flags |= TI_CLK_DPLL_HAS_FREQSEL;
/* Idlest value for interface clocks.
* 24xx uses 0 to indicate not ready, and 1 to indicate ready.
@ -839,11 +835,13 @@ void __init ti_clk_init_features(void)
* AM35xx uses both, depending on the module.
*/
if (cpu_is_omap24xx())
ti_clk_features.cm_idlest_val = OMAP24XX_CM_IDLEST_VAL;
features.cm_idlest_val = OMAP24XX_CM_IDLEST_VAL;
else if (cpu_is_omap34xx())
ti_clk_features.cm_idlest_val = OMAP34XX_CM_IDLEST_VAL;
features.cm_idlest_val = OMAP34XX_CM_IDLEST_VAL;
/* On OMAP3430 ES1.0, DPLL4 can't be re-programmed */
if (omap_rev() == OMAP3430_REV_ES1_0)
ti_clk_features.flags |= TI_CLK_DPLL4_DENY_REPROGRAM;
features.flags |= TI_CLK_DPLL4_DENY_REPROGRAM;
ti_clk_setup_features(&features);
}

18
arch/arm/mach-omap2/clock.h
View File

@ -225,24 +225,6 @@ 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)
#define TI_CLK_DPLL4_DENY_REPROGRAM (1 << 1)
extern struct ti_clk_features ti_clk_features;
extern const struct clkops clkops_omap2_dflt_wait;
extern const struct clkops clkops_omap2_dflt;

4
arch/arm/mach-omap2/clock3xxx.c
View File

@ -58,7 +58,7 @@ int omap3_dpll4_set_rate(struct clk_hw *hw, unsigned long rate,
* on 3430ES1 prevents us from changing DPLL multipliers or dividers
* on DPLL4.
*/
if (ti_clk_features.flags & TI_CLK_DPLL4_DENY_REPROGRAM) {
if (ti_clk_get_features()->flags & TI_CLK_DPLL4_DENY_REPROGRAM) {
pr_err("clock: DPLL4 cannot change rate due to silicon 'Limitation 2.5' on 3430ES1.\n");
return -EINVAL;
}
@ -81,7 +81,7 @@ int omap3_dpll4_set_rate(struct clk_hw *hw, unsigned long rate,
int omap3_dpll4_set_rate_and_parent(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate, u8 index)
{
if (ti_clk_features.flags & TI_CLK_DPLL4_DENY_REPROGRAM) {
if (ti_clk_get_features()->flags & TI_CLK_DPLL4_DENY_REPROGRAM) {
pr_err("clock: DPLL4 cannot change rate due to silicon 'Limitation 2.5' on 3430ES1.\n");
return -EINVAL;
}

4
arch/arm/mach-omap2/dpll3xxx.c
View File

@ -307,7 +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 (ti_clk_features.flags & TI_CLK_DPLL_HAS_FREQSEL) {
if (ti_clk_get_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);
@ -559,7 +559,7 @@ int omap3_noncore_dpll_set_rate(struct clk_hw *hw, unsigned long rate,
return -EINVAL;
/* Freqsel is available only on OMAP343X devices */
if (ti_clk_features.flags & TI_CLK_DPLL_HAS_FREQSEL) {
if (ti_clk_get_features()->flags & TI_CLK_DPLL_HAS_FREQSEL) {
freqsel = _omap3_dpll_compute_freqsel(clk, dd->last_rounded_n);
WARN_ON(!freqsel);
}

25
drivers/clk/ti/clk.c
View File

@ -30,6 +30,8 @@
struct ti_clk_ll_ops *ti_clk_ll_ops;
static struct device_node *clocks_node_ptr[CLK_MAX_MEMMAPS];
struct ti_clk_features ti_clk_features;
/**
* ti_dt_clocks_register - register DT alias clocks during boot
* @oclks: list of clocks to register
@ -311,3 +313,26 @@ int __init ti_clk_register_legacy_clks(struct ti_clk_alias *clks)
return 0;
}
#endif
/**
* ti_clk_setup_features - setup clock features flags
* @features: features definition to use
*
* Initializes the clock driver features flags based on platform
* provided data. No return value.
*/
void __init ti_clk_setup_features(struct ti_clk_features *features)
{
memcpy(&ti_clk_features, features, sizeof(*features));
}
/**
* ti_clk_get_features - get clock driver features flags
*
* Get TI clock driver features description. Returns a pointer
* to the current feature setup.
*/
const struct ti_clk_features *ti_clk_get_features(void)
{
return &ti_clk_features;
}

16
include/linux/clk/ti.h
View File

@ -338,6 +338,22 @@ int am43xx_dt_clk_init(void);
int omap2420_dt_clk_init(void);
int omap2430_dt_clk_init(void);
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 BIT(0)
#define TI_CLK_DPLL4_DENY_REPROGRAM BIT(1)
void ti_clk_setup_features(struct ti_clk_features *features);
const struct ti_clk_features *ti_clk_get_features(void);
#ifdef CONFIG_OF
void of_ti_clk_allow_autoidle_all(void);
void of_ti_clk_deny_autoidle_all(void);