diff options
author | viresh kumar <viresh.kumar@st.com> | 2011-02-16 06:40:31 (GMT) |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-03-09 09:49:45 (GMT) |
commit | cf285434ac0880f94bf4afdd90b06a4655f56570 (patch) | |
tree | 6b7b0f6716c17147e45cca39d01f88570d368eb5 | |
parent | 5c881d9ae9480171f01921585e1893863d7ab421 (diff) | |
download | linux-cf285434ac0880f94bf4afdd90b06a4655f56570.tar.xz |
ARM: 6679/1: SPEAr: make clk API functions more generic
- Add a dummy clk_set_rate() function. This is required for compilation
of a few drivers.
- Make functions in plat-spear/clock.c more generic over all SPEAr
platforms.
- Add div_factor in struct clk for clks with .recalc = follow_parent
- Change type of register pointers to void __iomem *
Reviewed-by: Stanley Miao <stanley.miao@windriver.com>
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r-- | arch/arm/mach-spear3xx/clock.c | 66 | ||||
-rw-r--r-- | arch/arm/mach-spear6xx/clock.c | 67 | ||||
-rw-r--r-- | arch/arm/plat-spear/clock.c | 59 | ||||
-rw-r--r-- | arch/arm/plat-spear/include/plat/clock.h | 68 |
4 files changed, 214 insertions, 46 deletions
diff --git a/arch/arm/mach-spear3xx/clock.c b/arch/arm/mach-spear3xx/clock.c index 18febf9..7ea8749 100644 --- a/arch/arm/mach-spear3xx/clock.c +++ b/arch/arm/mach-spear3xx/clock.c @@ -39,10 +39,25 @@ static struct clk rtc_clk = { }; /* clock derived from 24 MHz osc clk */ +/* pll masks structure */ +static struct pll_clk_masks pll1_masks = { + .mode_mask = PLL_MODE_MASK, + .mode_shift = PLL_MODE_SHIFT, + .norm_fdbk_m_mask = PLL_NORM_FDBK_M_MASK, + .norm_fdbk_m_shift = PLL_NORM_FDBK_M_SHIFT, + .dith_fdbk_m_mask = PLL_DITH_FDBK_M_MASK, + .dith_fdbk_m_shift = PLL_DITH_FDBK_M_SHIFT, + .div_p_mask = PLL_DIV_P_MASK, + .div_p_shift = PLL_DIV_P_SHIFT, + .div_n_mask = PLL_DIV_N_MASK, + .div_n_shift = PLL_DIV_N_SHIFT, +}; + /* pll1 configuration structure */ static struct pll_clk_config pll1_config = { .mode_reg = PLL1_CTR, .cfg_reg = PLL1_FRQ, + .masks = &pll1_masks, }; /* PLL1 clock */ @@ -50,7 +65,7 @@ static struct clk pll1_clk = { .pclk = &osc_24m_clk, .en_reg = PLL1_CTR, .en_reg_bit = PLL_ENABLE, - .recalc = &pll1_clk_recalc, + .recalc = &pll_clk_recalc, .private_data = &pll1_config, }; @@ -76,11 +91,16 @@ static struct clk cpu_clk = { .recalc = &follow_parent, }; +/* ahb masks structure */ +static struct bus_clk_masks ahb_masks = { + .mask = PLL_HCLK_RATIO_MASK, + .shift = PLL_HCLK_RATIO_SHIFT, +}; + /* ahb configuration structure */ static struct bus_clk_config ahb_config = { .reg = CORE_CLK_CFG, - .mask = PLL_HCLK_RATIO_MASK, - .shift = PLL_HCLK_RATIO_SHIFT, + .masks = &ahb_masks, }; /* ahb clock */ @@ -91,9 +111,22 @@ static struct clk ahb_clk = { .private_data = &ahb_config, }; +/* auxiliary synthesizers masks */ +static struct aux_clk_masks aux_masks = { + .eq_sel_mask = AUX_EQ_SEL_MASK, + .eq_sel_shift = AUX_EQ_SEL_SHIFT, + .eq1_mask = AUX_EQ1_SEL, + .eq2_mask = AUX_EQ2_SEL, + .xscale_sel_mask = AUX_XSCALE_MASK, + .xscale_sel_shift = AUX_XSCALE_SHIFT, + .yscale_sel_mask = AUX_YSCALE_MASK, + .yscale_sel_shift = AUX_YSCALE_SHIFT, +}; + /* uart configurations */ static struct aux_clk_config uart_config = { .synth_reg = UART_CLK_SYNT, + .masks = &aux_masks, }; /* uart parents */ @@ -130,6 +163,7 @@ static struct clk uart_clk = { /* firda configurations */ static struct aux_clk_config firda_config = { .synth_reg = FIRDA_CLK_SYNT, + .masks = &aux_masks, }; /* firda parents */ @@ -184,9 +218,18 @@ static struct pclk_sel gpt_pclk_sel = { .pclk_sel_mask = GPT_CLK_MASK, }; +/* gpt synthesizer masks */ +static struct gpt_clk_masks gpt_masks = { + .mscale_sel_mask = GPT_MSCALE_MASK, + .mscale_sel_shift = GPT_MSCALE_SHIFT, + .nscale_sel_mask = GPT_NSCALE_MASK, + .nscale_sel_shift = GPT_NSCALE_SHIFT, +}; + /* gpt0 configurations */ -static struct aux_clk_config gpt0_config = { +static struct gpt_clk_config gpt0_config = { .synth_reg = PRSC1_CLK_CFG, + .masks = &gpt_masks, }; /* gpt0 timer clock */ @@ -199,8 +242,9 @@ static struct clk gpt0_clk = { }; /* gpt1 configurations */ -static struct aux_clk_config gpt1_config = { +static struct gpt_clk_config gpt1_config = { .synth_reg = PRSC2_CLK_CFG, + .masks = &gpt_masks, }; /* gpt1 timer clock */ @@ -214,8 +258,9 @@ static struct clk gpt1_clk = { }; /* gpt2 configurations */ -static struct aux_clk_config gpt2_config = { +static struct gpt_clk_config gpt2_config = { .synth_reg = PRSC3_CLK_CFG, + .masks = &gpt_masks, }; /* gpt2 timer clock */ @@ -253,11 +298,16 @@ static struct clk clcd_clk = { }; /* clock derived from ahb clk */ +/* apb masks structure */ +static struct bus_clk_masks apb_masks = { + .mask = HCLK_PCLK_RATIO_MASK, + .shift = HCLK_PCLK_RATIO_SHIFT, +}; + /* apb configuration structure */ static struct bus_clk_config apb_config = { .reg = CORE_CLK_CFG, - .mask = HCLK_PCLK_RATIO_MASK, - .shift = HCLK_PCLK_RATIO_SHIFT, + .masks = &apb_masks, }; /* apb clock */ diff --git a/arch/arm/mach-spear6xx/clock.c b/arch/arm/mach-spear6xx/clock.c index 36ff056..ef88922 100644 --- a/arch/arm/mach-spear6xx/clock.c +++ b/arch/arm/mach-spear6xx/clock.c @@ -39,10 +39,25 @@ static struct clk rtc_clk = { }; /* clock derived from 30 MHz osc clk */ +/* pll masks structure */ +static struct pll_clk_masks pll1_masks = { + .mode_mask = PLL_MODE_MASK, + .mode_shift = PLL_MODE_SHIFT, + .norm_fdbk_m_mask = PLL_NORM_FDBK_M_MASK, + .norm_fdbk_m_shift = PLL_NORM_FDBK_M_SHIFT, + .dith_fdbk_m_mask = PLL_DITH_FDBK_M_MASK, + .dith_fdbk_m_shift = PLL_DITH_FDBK_M_SHIFT, + .div_p_mask = PLL_DIV_P_MASK, + .div_p_shift = PLL_DIV_P_SHIFT, + .div_n_mask = PLL_DIV_N_MASK, + .div_n_shift = PLL_DIV_N_SHIFT, +}; + /* pll1 configuration structure */ static struct pll_clk_config pll1_config = { .mode_reg = PLL1_CTR, .cfg_reg = PLL1_FRQ, + .masks = &pll1_masks, }; /* PLL1 clock */ @@ -50,7 +65,7 @@ static struct clk pll1_clk = { .pclk = &osc_30m_clk, .en_reg = PLL1_CTR, .en_reg_bit = PLL_ENABLE, - .recalc = &pll1_clk_recalc, + .recalc = &pll_clk_recalc, .private_data = &pll1_config, }; @@ -76,11 +91,16 @@ static struct clk cpu_clk = { .recalc = &follow_parent, }; +/* ahb masks structure */ +static struct bus_clk_masks ahb_masks = { + .mask = PLL_HCLK_RATIO_MASK, + .shift = PLL_HCLK_RATIO_SHIFT, +}; + /* ahb configuration structure */ static struct bus_clk_config ahb_config = { .reg = CORE_CLK_CFG, - .mask = PLL_HCLK_RATIO_MASK, - .shift = PLL_HCLK_RATIO_SHIFT, + .masks = &ahb_masks, }; /* ahb clock */ @@ -112,9 +132,22 @@ static struct pclk_sel uart_pclk_sel = { .pclk_sel_mask = UART_CLK_MASK, }; +/* auxiliary synthesizers masks */ +static struct aux_clk_masks aux_masks = { + .eq_sel_mask = AUX_EQ_SEL_MASK, + .eq_sel_shift = AUX_EQ_SEL_SHIFT, + .eq1_mask = AUX_EQ1_SEL, + .eq2_mask = AUX_EQ2_SEL, + .xscale_sel_mask = AUX_XSCALE_MASK, + .xscale_sel_shift = AUX_XSCALE_SHIFT, + .yscale_sel_mask = AUX_YSCALE_MASK, + .yscale_sel_shift = AUX_YSCALE_SHIFT, +}; + /* uart configurations */ static struct aux_clk_config uart_config = { .synth_reg = UART_CLK_SYNT, + .masks = &aux_masks, }; /* uart0 clock */ @@ -140,6 +173,7 @@ static struct clk uart1_clk = { /* firda configurations */ static struct aux_clk_config firda_config = { .synth_reg = FIRDA_CLK_SYNT, + .masks = &aux_masks, }; /* firda parents */ @@ -176,6 +210,7 @@ static struct clk firda_clk = { /* clcd configurations */ static struct aux_clk_config clcd_config = { .synth_reg = CLCD_CLK_SYNT, + .masks = &aux_masks, }; /* clcd parents */ @@ -230,9 +265,18 @@ static struct pclk_sel gpt_pclk_sel = { .pclk_sel_mask = GPT_CLK_MASK, }; +/* gpt synthesizer masks */ +static struct gpt_clk_masks gpt_masks = { + .mscale_sel_mask = GPT_MSCALE_MASK, + .mscale_sel_shift = GPT_MSCALE_SHIFT, + .nscale_sel_mask = GPT_NSCALE_MASK, + .nscale_sel_shift = GPT_NSCALE_SHIFT, +}; + /* gpt0_1 configurations */ -static struct aux_clk_config gpt0_1_config = { +static struct gpt_clk_config gpt0_1_config = { .synth_reg = PRSC1_CLK_CFG, + .masks = &gpt_masks, }; /* gpt0 ARM1 subsystem timer clock */ @@ -254,8 +298,9 @@ static struct clk gpt1_clk = { }; /* gpt2 configurations */ -static struct aux_clk_config gpt2_config = { +static struct gpt_clk_config gpt2_config = { .synth_reg = PRSC2_CLK_CFG, + .masks = &gpt_masks, }; /* gpt2 timer clock */ @@ -269,8 +314,9 @@ static struct clk gpt2_clk = { }; /* gpt3 configurations */ -static struct aux_clk_config gpt3_config = { +static struct gpt_clk_config gpt3_config = { .synth_reg = PRSC3_CLK_CFG, + .masks = &gpt_masks, }; /* gpt3 timer clock */ @@ -309,11 +355,16 @@ static struct clk usbd_clk = { }; /* clock derived from ahb clk */ +/* apb masks structure */ +static struct bus_clk_masks apb_masks = { + .mask = HCLK_PCLK_RATIO_MASK, + .shift = HCLK_PCLK_RATIO_SHIFT, +}; + /* apb configuration structure */ static struct bus_clk_config apb_config = { .reg = CORE_CLK_CFG, - .mask = HCLK_PCLK_RATIO_MASK, - .shift = HCLK_PCLK_RATIO_SHIFT, + .masks = &apb_masks, }; /* apb clock */ diff --git a/arch/arm/plat-spear/clock.c b/arch/arm/plat-spear/clock.c index ee4f90e..f1cf832 100644 --- a/arch/arm/plat-spear/clock.c +++ b/arch/arm/plat-spear/clock.c @@ -17,7 +17,6 @@ #include <linux/list.h> #include <linux/module.h> #include <linux/spinlock.h> -#include <mach/misc_regs.h> #include <plat/clock.h> static DEFINE_SPINLOCK(clocks_lock); @@ -187,6 +186,20 @@ int clk_set_parent(struct clk *clk, struct clk *parent) } EXPORT_SYMBOL(clk_set_parent); +/** + * clk_set_rate - set the clock rate for a clock source + * @clk: clock source + * @rate: desired clock rate in Hz + * + * Returns success (0) or negative errno. + */ +int clk_set_rate(struct clk *clk, unsigned long rate) +{ + /* TODO */ + return -EINVAL; +} +EXPORT_SYMBOL(clk_set_rate); + /* registers clock in platform clock framework */ void clk_register(struct clk_lookup *cl) { @@ -212,6 +225,7 @@ void clk_register(struct clk_lookup *cl) list_add(&clk->sibling, &clk->pclk->children); } else { /* add clocks with > 1 parent to 1st parent's children list */ + clk->pclk = clk->pclk_sel->pclk_info[0].pclk; list_add(&clk->sibling, &clk->pclk_sel->pclk_info[0].pclk->children); } @@ -283,29 +297,31 @@ static void change_parent(struct clk *cclk, struct clk *pclk) * In Dithered mode * rate = (2 * M[15:0] * Fin)/(256 * N * 2^P) */ -void pll1_clk_recalc(struct clk *clk) +void pll_clk_recalc(struct clk *clk) { struct pll_clk_config *config = clk->private_data; unsigned int num = 2, den = 0, val, mode = 0; unsigned long flags; spin_lock_irqsave(&clocks_lock, flags); - mode = (readl(config->mode_reg) >> PLL_MODE_SHIFT) & - PLL_MODE_MASK; + mode = (readl(config->mode_reg) >> config->masks->mode_shift) & + config->masks->mode_mask; val = readl(config->cfg_reg); /* calculate denominator */ - den = (val >> PLL_DIV_P_SHIFT) & PLL_DIV_P_MASK; + den = (val >> config->masks->div_p_shift) & config->masks->div_p_mask; den = 1 << den; - den *= (val >> PLL_DIV_N_SHIFT) & PLL_DIV_N_MASK; + den *= (val >> config->masks->div_n_shift) & config->masks->div_n_mask; /* calculate numerator & denominator */ if (!mode) { /* Normal mode */ - num *= (val >> PLL_NORM_FDBK_M_SHIFT) & PLL_NORM_FDBK_M_MASK; + num *= (val >> config->masks->norm_fdbk_m_shift) & + config->masks->norm_fdbk_m_mask; } else { /* Dithered mode */ - num *= (val >> PLL_DITH_FDBK_M_SHIFT) & PLL_DITH_FDBK_M_MASK; + num *= (val >> config->masks->dith_fdbk_m_shift) & + config->masks->dith_fdbk_m_mask; den *= 256; } @@ -321,7 +337,8 @@ void bus_clk_recalc(struct clk *clk) unsigned long flags; spin_lock_irqsave(&clocks_lock, flags); - div = ((readl(config->reg) >> config->shift) & config->mask) + 1; + div = ((readl(config->reg) >> config->masks->shift) & + config->masks->mask) + 1; clk->rate = (unsigned long)clk->pclk->rate / div; spin_unlock_irqrestore(&clocks_lock, flags); } @@ -359,15 +376,18 @@ void aux_clk_recalc(struct clk *clk) if (pclk_info->scalable) { val = readl(config->synth_reg); - eqn = (val >> AUX_EQ_SEL_SHIFT) & AUX_EQ_SEL_MASK; - if (eqn == AUX_EQ1_SEL) + eqn = (val >> config->masks->eq_sel_shift) & + config->masks->eq_sel_mask; + if (eqn == config->masks->eq1_mask) den *= 2; /* calculate numerator */ - num = (val >> AUX_XSCALE_SHIFT) & AUX_XSCALE_MASK; + num = (val >> config->masks->xscale_sel_shift) & + config->masks->xscale_sel_mask; /* calculate denominator */ - den *= (val >> AUX_YSCALE_SHIFT) & AUX_YSCALE_MASK; + den *= (val >> config->masks->yscale_sel_shift) & + config->masks->yscale_sel_mask; val = (((clk->pclk->rate/10000) * num) / den) * 10000; } else val = clk->pclk->rate; @@ -383,7 +403,7 @@ void aux_clk_recalc(struct clk *clk) */ void gpt_clk_recalc(struct clk *clk) { - struct aux_clk_config *config = clk->private_data; + struct gpt_clk_config *config = clk->private_data; struct pclk_info *pclk_info = NULL; unsigned int div = 1, val; unsigned long flags; @@ -402,8 +422,10 @@ void gpt_clk_recalc(struct clk *clk) spin_lock_irqsave(&clocks_lock, flags); if (pclk_info->scalable) { val = readl(config->synth_reg); - div += (val >> GPT_MSCALE_SHIFT) & GPT_MSCALE_MASK; - div *= 1 << (((val >> GPT_NSCALE_SHIFT) & GPT_NSCALE_MASK) + 1); + div += (val >> config->masks->mscale_sel_shift) & + config->masks->mscale_sel_mask; + div *= 1 << (((val >> config->masks->nscale_sel_shift) & + config->masks->nscale_sel_mask) + 1); } clk->rate = (unsigned long)clk->pclk->rate / div; @@ -411,15 +433,16 @@ void gpt_clk_recalc(struct clk *clk) } /* - * Used for clocks that always have same value as the parent clock divided by a + * Used for clocks that always have value as the parent clock divided by a * fixed divisor */ void follow_parent(struct clk *clk) { unsigned long flags; + unsigned int div_factor = (clk->div_factor < 1) ? 1 : clk->div_factor; spin_lock_irqsave(&clocks_lock, flags); - clk->rate = clk->pclk->rate; + clk->rate = clk->pclk->rate/div_factor; spin_unlock_irqrestore(&clocks_lock, flags); } diff --git a/arch/arm/plat-spear/include/plat/clock.h b/arch/arm/plat-spear/include/plat/clock.h index 2572260..863d9e9 100644 --- a/arch/arm/plat-spear/include/plat/clock.h +++ b/arch/arm/plat-spear/include/plat/clock.h @@ -54,7 +54,7 @@ struct pclk_info { struct pclk_sel { struct pclk_info *pclk_info; u8 pclk_count; - unsigned int *pclk_sel_reg; + void __iomem *pclk_sel_reg; unsigned int pclk_sel_mask; }; @@ -67,6 +67,7 @@ struct pclk_sel { * @en_reg_bit: clk enable/disable bit * @ops: clk enable/disable ops - generic_clkops selected if NULL * @recalc: pointer to clock rate recalculate function + * @div_factor: division factor to parent clock. Only for recalc = follow_parent * @pclk: current parent clk * @pclk_sel: pointer to parent selection structure * @pclk_sel_shift: register shift for selecting parent of this clock @@ -78,10 +79,11 @@ struct clk { unsigned int usage_count; unsigned int flags; unsigned long rate; - unsigned int *en_reg; + void __iomem *en_reg; u8 en_reg_bit; const struct clkops *ops; void (*recalc) (struct clk *); + unsigned int div_factor; struct clk *pclk; struct pclk_sel *pclk_sel; @@ -93,23 +95,65 @@ struct clk { }; /* pll configuration structure */ +struct pll_clk_masks { + u32 mode_mask; + u32 mode_shift; + + u32 norm_fdbk_m_mask; + u32 norm_fdbk_m_shift; + u32 dith_fdbk_m_mask; + u32 dith_fdbk_m_shift; + u32 div_p_mask; + u32 div_p_shift; + u32 div_n_mask; + u32 div_n_shift; +}; + struct pll_clk_config { - unsigned int *mode_reg; - unsigned int *cfg_reg; + void __iomem *mode_reg; + void __iomem *cfg_reg; + struct pll_clk_masks *masks; }; /* ahb and apb bus configuration structure */ +struct bus_clk_masks { + u32 mask; + u32 shift; +}; + struct bus_clk_config { - unsigned int *reg; - unsigned int mask; - unsigned int shift; + void __iomem *reg; + struct bus_clk_masks *masks; +}; + +/* Aux clk configuration structure: applicable to UART and FIRDA */ +struct aux_clk_masks { + u32 eq_sel_mask; + u32 eq_sel_shift; + u32 eq1_mask; + u32 eq2_mask; + u32 xscale_sel_mask; + u32 xscale_sel_shift; + u32 yscale_sel_mask; + u32 yscale_sel_shift; }; -/* - * Aux clk configuration structure: applicable to GPT, UART and FIRDA - */ struct aux_clk_config { - unsigned int *synth_reg; + void __iomem *synth_reg; + struct aux_clk_masks *masks; +}; + +/* GPT clk configuration structure */ +struct gpt_clk_masks { + u32 mscale_sel_mask; + u32 mscale_sel_shift; + u32 nscale_sel_mask; + u32 nscale_sel_shift; +}; + +struct gpt_clk_config { + void __iomem *synth_reg; + struct gpt_clk_masks *masks; }; /* platform specific clock functions */ @@ -118,7 +162,7 @@ void recalc_root_clocks(void); /* clock recalc functions */ void follow_parent(struct clk *clk); -void pll1_clk_recalc(struct clk *clk); +void pll_clk_recalc(struct clk *clk); void bus_clk_recalc(struct clk *clk); void gpt_clk_recalc(struct clk *clk); void aux_clk_recalc(struct clk *clk); |