diff options
| -rw-r--r-- | drivers/clk/at91/clk-generated.c | 46 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-main.c | 66 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-master.c | 194 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-peripheral.c | 40 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-pll.c | 39 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-programmable.c | 29 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-sam9x60-pll.c | 68 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-system.c | 20 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-usb.c | 27 | ||||
| -rw-r--r-- | drivers/clk/at91/clk-utmi.c | 39 | ||||
| -rw-r--r-- | drivers/clk/at91/pmc.c | 147 | ||||
| -rw-r--r-- | drivers/clk/at91/pmc.h | 24 |
12 files changed, 558 insertions, 181 deletions
diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c index b656d25a9767..23cc8297ec4c 100644 --- a/drivers/clk/at91/clk-generated.c +++ b/drivers/clk/at91/clk-generated.c @@ -27,6 +27,7 @@ struct clk_generated { u32 id; u32 gckdiv; const struct clk_pcr_layout *layout; + struct at91_clk_pms pms; u8 parent_id; int chg_pid; }; @@ -34,25 +35,35 @@ struct clk_generated { #define to_clk_generated(hw) \ container_of(hw, struct clk_generated, hw) -static int clk_generated_enable(struct clk_hw *hw) +static int clk_generated_set(struct clk_generated *gck, int status) { - struct clk_generated *gck = to_clk_generated(hw); unsigned long flags; - - pr_debug("GCLK: %s, gckdiv = %d, parent id = %d\n", - __func__, gck->gckdiv, gck->parent_id); + unsigned int enable = status ? AT91_PMC_PCR_GCKEN : 0; spin_lock_irqsave(gck->lock, flags); regmap_write(gck->regmap, gck->layout->offset, (gck->id & gck->layout->pid_mask)); regmap_update_bits(gck->regmap, gck->layout->offset, AT91_PMC_PCR_GCKDIV_MASK | gck->layout->gckcss_mask | - gck->layout->cmd | AT91_PMC_PCR_GCKEN, + gck->layout->cmd | enable, field_prep(gck->layout->gckcss_mask, gck->parent_id) | gck->layout->cmd | FIELD_PREP(AT91_PMC_PCR_GCKDIV_MASK, gck->gckdiv) | - AT91_PMC_PCR_GCKEN); + enable); spin_unlock_irqrestore(gck->lock, flags); + + return 0; +} + +static int clk_generated_enable(struct clk_hw *hw) +{ + struct clk_generated *gck = to_clk_generated(hw); + + pr_debug("GCLK: %s, gckdiv = %d, parent id = %d\n", + __func__, gck->gckdiv, gck->parent_id); + + clk_generated_set(gck, 1); + return 0; } @@ -245,6 +256,23 @@ static int clk_generated_set_rate(struct clk_hw *hw, return 0; } +static int clk_generated_save_context(struct clk_hw *hw) +{ + struct clk_generated *gck = to_clk_generated(hw); + + gck->pms.status = clk_generated_is_enabled(&gck->hw); + + return 0; +} + +static void clk_generated_restore_context(struct clk_hw *hw) +{ + struct clk_generated *gck = to_clk_generated(hw); + + if (gck->pms.status) + clk_generated_set(gck, gck->pms.status); +} + static const struct clk_ops generated_ops = { .enable = clk_generated_enable, .disable = clk_generated_disable, @@ -254,6 +282,8 @@ static const struct clk_ops generated_ops = { .get_parent = clk_generated_get_parent, .set_parent = clk_generated_set_parent, .set_rate = clk_generated_set_rate, + .save_context = clk_generated_save_context, + .restore_context = clk_generated_restore_context, }; /** @@ -320,8 +350,6 @@ at91_clk_register_generated(struct regmap *regmap, spinlock_t *lock, if (ret) { kfree(gck); hw = ERR_PTR(ret); - } else { - pmc_register_id(id); } return hw; diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c index cfae2f59df66..8601b27c1ae0 100644 --- a/drivers/clk/at91/clk-main.c +++ b/drivers/clk/at91/clk-main.c @@ -28,6 +28,7 @@ struct clk_main_osc { struct clk_hw hw; struct regmap *regmap; + struct at91_clk_pms pms; }; #define to_clk_main_osc(hw) container_of(hw, struct clk_main_osc, hw) @@ -37,6 +38,7 @@ struct clk_main_rc_osc { struct regmap *regmap; unsigned long frequency; unsigned long accuracy; + struct at91_clk_pms pms; }; #define to_clk_main_rc_osc(hw) container_of(hw, struct clk_main_rc_osc, hw) @@ -51,6 +53,7 @@ struct clk_rm9200_main { struct clk_sam9x5_main { struct clk_hw hw; struct regmap *regmap; + struct at91_clk_pms pms; u8 parent; }; @@ -120,10 +123,29 @@ static int clk_main_osc_is_prepared(struct clk_hw *hw) return (status & AT91_PMC_MOSCS) && clk_main_parent_select(tmp); } +static int clk_main_osc_save_context(struct clk_hw *hw) +{ + struct clk_main_osc *osc = to_clk_main_osc(hw); + + osc->pms.status = clk_main_osc_is_prepared(hw); + + return 0; +} + +static void clk_main_osc_restore_context(struct clk_hw *hw) +{ + struct clk_main_osc *osc = to_clk_main_osc(hw); + + if (osc->pms.status) + clk_main_osc_prepare(hw); +} + static const struct clk_ops main_osc_ops = { .prepare = clk_main_osc_prepare, .unprepare = clk_main_osc_unprepare, .is_prepared = clk_main_osc_is_prepared, + .save_context = clk_main_osc_save_context, + .restore_context = clk_main_osc_restore_context, }; struct clk_hw * __init @@ -240,12 +262,31 @@ static unsigned long clk_main_rc_osc_recalc_accuracy(struct clk_hw *hw, return osc->accuracy; } +static int clk_main_rc_osc_save_context(struct clk_hw *hw) +{ + struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw); + + osc->pms.status = clk_main_rc_osc_is_prepared(hw); + + return 0; +} + +static void clk_main_rc_osc_restore_context(struct clk_hw *hw) +{ + struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw); + + if (osc->pms.status) + clk_main_rc_osc_prepare(hw); +} + static const struct clk_ops main_rc_osc_ops = { .prepare = clk_main_rc_osc_prepare, .unprepare = clk_main_rc_osc_unprepare, .is_prepared = clk_main_rc_osc_is_prepared, .recalc_rate = clk_main_rc_osc_recalc_rate, .recalc_accuracy = clk_main_rc_osc_recalc_accuracy, + .save_context = clk_main_rc_osc_save_context, + .restore_context = clk_main_rc_osc_restore_context, }; struct clk_hw * __init @@ -465,12 +506,37 @@ static u8 clk_sam9x5_main_get_parent(struct clk_hw *hw) return clk_main_parent_select(status); } +static int clk_sam9x5_main_save_context(struct clk_hw *hw) +{ + struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw); + + clkmain->pms.status = clk_main_rc_osc_is_prepared(&clkmain->hw); + clkmain->pms.parent = clk_sam9x5_main_get_parent(&clkmain->hw); + + return 0; +} + +static void clk_sam9x5_main_restore_context(struct clk_hw *hw) +{ + struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw); + int ret; + + ret = clk_sam9x5_main_set_parent(hw, clkmain->pms.parent); + if (ret) + return; + + if (clkmain->pms.status) + clk_sam9x5_main_prepare(hw); +} + static const struct clk_ops sam9x5_main_ops = { .prepare = clk_sam9x5_main_prepare, .is_prepared = clk_sam9x5_main_is_prepared, .recalc_rate = clk_sam9x5_main_recalc_rate, .set_parent = clk_sam9x5_main_set_parent, .get_parent = clk_sam9x5_main_get_parent, + .save_context = clk_sam9x5_main_save_context, + .restore_context = clk_sam9x5_main_restore_context, }; struct clk_hw * __init diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c index a80427980bf7..f75549fff023 100644 --- a/drivers/clk/at91/clk-master.c +++ b/drivers/clk/at91/clk-master.c @@ -37,6 +37,7 @@ struct clk_master { spinlock_t *lock; const struct clk_master_layout *layout; const struct clk_master_characteristics *characteristics; + struct at91_clk_pms pms; u32 *mux_table; u32 mckr; int chg_pid; @@ -112,10 +113,52 @@ static unsigned long clk_master_div_recalc_rate(struct clk_hw *hw, return rate; } +static int clk_master_div_save_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + struct clk_hw *parent_hw = clk_hw_get_parent(hw); + unsigned long flags; + unsigned int mckr, div; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &mckr); + spin_unlock_irqrestore(master->lock, flags); + + mckr &= master->layout->mask; + div = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK; + div = master->characteristics->divisors[div]; + + master->pms.parent_rate = clk_hw_get_rate(parent_hw); + master->pms.rate = DIV_ROUND_CLOSEST(master->pms.parent_rate, div); + + return 0; +} + +static void clk_master_div_restore_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + unsigned int mckr; + u8 div; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &mckr); + spin_unlock_irqrestore(master->lock, flags); + + mckr &= master->layout->mask; + div = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK; + div = master->characteristics->divisors[div]; + + if (div != DIV_ROUND_CLOSEST(master->pms.parent_rate, master->pms.rate)) + pr_warn("MCKR DIV not configured properly by firmware!\n"); +} + static const struct clk_ops master_div_ops = { .prepare = clk_master_prepare, .is_prepared = clk_master_is_prepared, .recalc_rate = clk_master_div_recalc_rate, + .save_context = clk_master_div_save_context, + .restore_context = clk_master_div_restore_context, }; static int clk_master_div_set_rate(struct clk_hw *hw, unsigned long rate, @@ -125,7 +168,9 @@ static int clk_master_div_set_rate(struct clk_hw *hw, unsigned long rate, const struct clk_master_characteristics *characteristics = master->characteristics; unsigned long flags; + unsigned int mckr, tmp; int div, i; + int ret; div = DIV_ROUND_CLOSEST(parent_rate, rate); if (div > ARRAY_SIZE(characteristics->divisors)) @@ -145,11 +190,24 @@ static int clk_master_div_set_rate(struct clk_hw *hw, unsigned long rate, return -EINVAL; spin_lock_irqsave(master->lock, flags); - regmap_update_bits(master->regmap, master->layout->offset, - (MASTER_DIV_MASK << MASTER_DIV_SHIFT), - (div << MASTER_DIV_SHIFT)); + ret = regmap_read(master->regmap, master->layout->offset, &mckr); + if (ret) + goto unlock; + + tmp = mckr & master->layout->mask; + tmp = (tmp >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK; + if (tmp == div) + goto unlock; + + mckr &= ~(MASTER_DIV_MASK << MASTER_DIV_SHIFT); + mckr |= (div << MASTER_DIV_SHIFT); + ret = regmap_write(master->regmap, master->layout->offset, mckr); + if (ret) + goto unlock; + while (!clk_master_ready(master)) cpu_relax(); +unlock: spin_unlock_irqrestore(master->lock, flags); return 0; @@ -197,12 +255,25 @@ static int clk_master_div_determine_rate(struct clk_hw *hw, return 0; } +static void clk_master_div_restore_context_chg(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + int ret; + + ret = clk_master_div_set_rate(hw, master->pms.rate, + master->pms.parent_rate); + if (ret) + pr_warn("Failed to restore MCK DIV clock\n"); +} + static const struct clk_ops master_div_ops_chg = { .prepare = clk_master_prepare, .is_prepared = clk_master_is_prepared, .recalc_rate = clk_master_div_recalc_rate, .determine_rate = clk_master_div_determine_rate, .set_rate = clk_master_div_set_rate, + .save_context = clk_master_div_save_context, + .restore_context = clk_master_div_restore_context_chg, }; static void clk_sama7g5_master_best_diff(struct clk_rate_request *req, @@ -272,7 +343,8 @@ static int clk_master_pres_set_rate(struct clk_hw *hw, unsigned long rate, { struct clk_master *master = to_clk_master(hw); unsigned long flags; - unsigned int pres; + unsigned int pres, mckr, tmp; + int ret; pres = DIV_ROUND_CLOSEST(parent_rate, rate); if (pres > MASTER_PRES_MAX) @@ -284,15 +356,27 @@ static int clk_master_pres_set_rate(struct clk_hw *hw, unsigned long rate, pres = ffs(pres) - 1; spin_lock_irqsave(master->lock, flags); - regmap_update_bits(master->regmap, master->layout->offset, - (MASTER_PRES_MASK << master->layout->pres_shift), - (pres << master->layout->pres_shift)); + ret = regmap_read(master->regmap, master->layout->offset, &mckr); + if (ret) + goto unlock; + + mckr &= master->layout->mask; + tmp = (mckr >> master->layout->pres_shift) & MASTER_PRES_MASK; + if (pres == tmp) + goto unlock; + + mckr &= ~(MASTER_PRES_MASK << master->layout->pres_shift); + mckr |= (pres << master->layout->pres_shift); + ret = regmap_write(master->regmap, master->layout->offset, mckr); + if (ret) + goto unlock; while (!clk_master_ready(master)) cpu_relax(); +unlock: spin_unlock_irqrestore(master->lock, flags); - return 0; + return ret; } static unsigned long clk_master_pres_recalc_rate(struct clk_hw *hw, @@ -330,11 +414,68 @@ static u8 clk_master_pres_get_parent(struct clk_hw *hw) return mckr & AT91_PMC_CSS; } +static int clk_master_pres_save_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + struct clk_hw *parent_hw = clk_hw_get_parent(hw); + unsigned long flags; + unsigned int val, pres; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &val); + spin_unlock_irqrestore(master->lock, flags); + + val &= master->layout->mask; + pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK; + if (pres == MASTER_PRES_MAX && master->characteristics->have_div3_pres) + pres = 3; + else + pres = (1 << pres); + + master->pms.parent = val & AT91_PMC_CSS; + master->pms.parent_rate = clk_hw_get_rate(parent_hw); + master->pms.rate = DIV_ROUND_CLOSEST_ULL(master->pms.parent_rate, pres); + + return 0; +} + +static void clk_master_pres_restore_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + unsigned int val, pres; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &val); + spin_unlock_irqrestore(master->lock, flags); + + val &= master->layout->mask; + pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK; + if (pres == MASTER_PRES_MAX && master->characteristics->have_div3_pres) + pres = 3; + else + pres = (1 << pres); + + if (master->pms.rate != + DIV_ROUND_CLOSEST_ULL(master->pms.parent_rate, pres) || + (master->pms.parent != (val & AT91_PMC_CSS))) + pr_warn("MCKR PRES was not configured properly by firmware!\n"); +} + +static void clk_master_pres_restore_context_chg(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + + clk_master_pres_set_rate(hw, master->pms.rate, master->pms.parent_rate); +} + static const struct clk_ops master_pres_ops = { .prepare = clk_master_prepare, .is_prepared = clk_master_is_prepared, .recalc_rate = clk_master_pres_recalc_rate, .get_parent = clk_master_pres_get_parent, + .save_context = clk_master_pres_save_context, + .restore_context = clk_master_pres_restore_context, }; static const struct clk_ops master_pres_ops_chg = { @@ -344,6 +485,8 @@ static const struct clk_ops master_pres_ops_chg = { .recalc_rate = clk_master_pres_recalc_rate, .get_parent = clk_master_pres_get_parent, .set_rate = clk_master_pres_set_rate, + .save_context = clk_master_pres_save_context, + .restore_context = clk_master_pres_restore_context_chg, }; static struct clk_hw * __init @@ -539,20 +682,21 @@ static int clk_sama7g5_master_set_parent(struct clk_hw *hw, u8 index) return 0; } -static int clk_sama7g5_master_enable(struct clk_hw *hw) +static void clk_sama7g5_master_set(struct clk_master *master, + unsigned int status) { - struct clk_master *master = to_clk_master(hw); unsigned long flags; unsigned int val, cparent; + unsigned int enable = status ? PMC_MCR_EN : 0; spin_lock_irqsave(master->lock, flags); regmap_write(master->regmap, PMC_MCR, PMC_MCR_ID(master->id)); regmap_read(master->regmap, PMC_MCR, &val); regmap_update_bits(master->regmap, PMC_MCR, - PMC_MCR_EN | PMC_MCR_CSS | PMC_MCR_DIV | + enable | PMC_MCR_CSS | PMC_MCR_DIV | PMC_MCR_CMD | PMC_MCR_ID_MSK, - PMC_MCR_EN | (master->parent << PMC_MCR_CSS_SHIFT) | + enable | (master->parent << PMC_MCR_CSS_SHIFT) | (master->div << MASTER_DIV_SHIFT) | PMC_MCR_CMD | PMC_MCR_ID(master->id)); @@ -563,6 +707,13 @@ static int clk_sama7g5_master_enable(struct clk_hw *hw) cpu_relax(); spin_unlock_irqrestore(master->lock, flags); +} + +static int clk_sama7g5_master_enable(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + + clk_sama7g5_master_set(master, 1); return 0; } @@ -620,6 +771,23 @@ static int clk_sama7g5_master_set_rate(struct clk_hw *hw, unsigned long rate, return 0; } +static int clk_sama7g5_master_save_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + + master->pms.status = clk_sama7g5_master_is_enabled(hw); + + return 0; +} + +static void clk_sama7g5_master_restore_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + + if (master->pms.status) + clk_sama7g5_master_set(master, master->pms.status); +} + static const struct clk_ops sama7g5_master_ops = { .enable = clk_sama7g5_master_enable, .disable = clk_sama7g5_master_disable, @@ -629,6 +797,8 @@ static const struct clk_ops sama7g5_master_ops = { .set_rate = clk_sama7g5_master_set_rate, .get_parent = clk_sama7g5_master_get_parent, .set_parent = clk_sama7g5_master_set_parent, + .save_context = clk_sama7g5_master_save_context, + .restore_context = clk_sama7g5_master_restore_context, }; struct clk_hw * __init diff --git a/drivers/clk/at91/clk-peripheral.c b/drivers/clk/at91/clk-peripheral.c index 7a27ba8e0577..e14fa5ac734c 100644 --- a/drivers/clk/at91/clk-peripheral.c +++ b/drivers/clk/at91/clk-peripheral.c @@ -37,6 +37,7 @@ struct clk_sam9x5_peripheral { u32 id; u32 div; const struct clk_pcr_layout *layout; + struct at91_clk_pms pms; bool auto_div; int chg_pid; }; @@ -155,10 +156,11 @@ static void clk_sam9x5_peripheral_autodiv(struct clk_sam9x5_peripheral *periph) periph->div = shift; } -static int clk_sam9x5_peripheral_enable(struct clk_hw *hw) +static int clk_sam9x5_peripheral_set(struct clk_sam9x5_peripheral *periph, + unsigned int status) { - struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); unsigned long flags; + unsigned int enable = status ? AT91_PMC_PCR_EN : 0; if (periph->id < PERIPHERAL_ID_MIN) return 0; @@ -168,15 +170,21 @@ static int clk_sam9x5_peripheral_enable(struct clk_hw *hw) (periph->id & periph->layout->pid_mask)); regmap_update_bits(periph->regmap, periph->layout->offset, periph->layout->div_mask | periph->layout->cmd | - AT91_PMC_PCR_EN, + enable, field_prep(periph->layout->div_mask, periph->div) | - periph->layout->cmd | - AT91_PMC_PCR_EN); + periph->layout->cmd | enable); spin_unlock_irqrestore(periph->lock, flags); return 0; } +static int clk_sam9x5_peripheral_enable(struct clk_hw *hw) +{ + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + + return clk_sam9x5_peripheral_set(periph, 1); +} + static void clk_sam9x5_peripheral_disable(struct clk_hw *hw) { struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); @@ -393,6 +401,23 @@ static int clk_sam9x5_peripheral_set_rate(struct clk_hw *hw, return -EINVAL; } +static int clk_sam9x5_peripheral_save_context(struct clk_hw *hw) +{ + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + + periph->pms.status = clk_sam9x5_peripheral_is_enabled(hw); + + return 0; +} + +static void clk_sam9x5_peripheral_restore_context(struct clk_hw *hw) +{ + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + + if (periph->pms.status) + clk_sam9x5_peripheral_set(periph, periph->pms.status); +} + static const struct clk_ops sam9x5_peripheral_ops = { .enable = clk_sam9x5_peripheral_enable, .disable = clk_sam9x5_peripheral_disable, @@ -400,6 +425,8 @@ static const struct clk_ops sam9x5_peripheral_ops = { .recalc_rate = clk_sam9x5_peripheral_recalc_rate, .round_rate = clk_sam9x5_peripheral_round_rate, .set_rate = clk_sam9x5_peripheral_set_rate, + .save_context = clk_sam9x5_peripheral_save_context, + .restore_context = clk_sam9x5_peripheral_restore_context, }; static const struct clk_ops sam9x5_peripheral_chg_ops = { @@ -409,6 +436,8 @@ static const struct clk_ops sam9x5_peripheral_chg_ops = { .recalc_rate = clk_sam9x5_peripheral_recalc_rate, .determine_rate = clk_sam9x5_peripheral_determine_rate, .set_rate = clk_sam9x5_peripheral_set_rate, + .save_context = clk_sam9x5_peripheral_save_context, + .restore_context = clk_sam9x5_peripheral_restore_context, }; struct clk_hw * __init @@ -460,7 +489,6 @@ at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock, hw = ERR_PTR(ret); } else { clk_sam9x5_peripheral_autodiv(periph); - pmc_register_id(id); } return hw; diff --git a/drivers/clk/at91/clk-pll.c b/drivers/clk/at91/clk-pll.c index 6ed986d3eee0..249d6a53cedf 100644 --- a/drivers/clk/at91/clk-pll.c +++ b/drivers/clk/at91/clk-pll.c @@ -40,6 +40,7 @@ struct clk_pll { u16 mul; const struct clk_pll_layout *layout; const struct clk_pll_characteristics *characteristics; + struct at91_clk_pms pms; }; static inline bool clk_pll_ready(struct regmap *regmap, int id) @@ -260,6 +261,42 @@ static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate, return 0; } +static int clk_pll_save_context(struct clk_hw *hw) +{ + struct clk_pll *pll = to_clk_pll(hw); + struct clk_hw *parent_hw = clk_hw_get_parent(hw); + + pll->pms.parent_rate = clk_hw_get_rate(parent_hw); + pll->pms.rate = clk_pll_recalc_rate(&pll->hw, pll->pms.parent_rate); + pll->pms.status = clk_pll_ready(pll->regmap, PLL_REG(pll->id)); + + return 0; +} + +static void clk_pll_restore_context(struct clk_hw *hw) +{ + struct clk_pll *pll = to_clk_pll(hw); + unsigned long calc_rate; + unsigned int pllr, pllr_out, pllr_count; + u8 out = 0; + + if (pll->characteristics->out) + out = pll->characteristics->out[pll->range]; + + regmap_read(pll->regmap, PLL_REG(pll->id), &pllr); + + calc_rate = (pll->pms.parent_rate / PLL_DIV(pllr)) * + (PLL_MUL(pllr, pll->layout) + 1); + pllr_count = (pllr >> PLL_COUNT_SHIFT) & PLL_MAX_COUNT; + pllr_out = (pllr >> PLL_OUT_SHIFT) & out; + + if (pll->pms.rate != calc_rate || + pll->pms.status != clk_pll_ready(pll->regmap, PLL_REG(pll->id)) || + pllr_count != PLL_MAX_COUNT || + (out && pllr_out != out)) + pr_warn("PLLAR was not configured properly by firmware\n"); +} + static const struct clk_ops pll_ops = { .prepare = clk_pll_prepare, .unprepare = clk_pll_unprepare, @@ -267,6 +304,8 @@ static const struct clk_ops pll_ops = { .recalc_rate = clk_pll_recalc_rate, .round_rate = clk_pll_round_rate, .set_rate = clk_pll_set_rate, + .save_context = clk_pll_save_context, + .restore_context = clk_pll_restore_context, }; struct clk_hw * __init diff --git a/drivers/clk/at91/clk-programmable.c b/drivers/clk/at91/clk-programmable.c index fcf8f6a1c2c6..6c4b259d31d3 100644 --- a/drivers/clk/at91/clk-programmable.c +++ b/drivers/clk/at91/clk-programmable.c @@ -24,6 +24,7 @@ struct clk_programmable { u32 *mux_table; u8 id; const struct clk_programmable_layout *layout; + struct at91_clk_pms pms; }; #define to_clk_programmable(hw) container_of(hw, struct clk_programmable, hw) @@ -177,12 +178,38 @@ static int clk_programmable_set_rate(struct clk_hw *hw, unsigned long rate, return 0; } +static int clk_programmable_save_context(struct clk_hw *hw) +{ + struct clk_programmable *prog = to_clk_programmable(hw); + struct clk_hw *parent_hw = clk_hw_get_parent(hw); + + prog->pms.parent = clk_programmable_get_parent(hw); + prog->pms.parent_rate = clk_hw_get_rate(parent_hw); + prog->pms.rate = clk_programmable_recalc_rate(hw, prog->pms.parent_rate); + + return 0; +} + +static void clk_programmable_restore_context(struct clk_hw *hw) +{ + struct clk_programmable *prog = to_clk_programmable(hw); + int ret; + + ret = clk_programmable_set_parent(hw, prog->pms.parent); + if (ret) + return; + + clk_programmable_set_rate(hw, prog->pms.rate, prog->pms.parent_rate); +} + static const struct clk_ops programmable_ops = { .recalc_rate = clk_programmable_recalc_rate, .determine_rate = clk_programmable_determine_rate, .get_parent = clk_programmable_get_parent, .set_parent = clk_programmable_set_parent, .set_rate = clk_programmable_set_rate, + .save_context = clk_programmable_save_context, + .restore_context = clk_programmable_restore_context, }; struct clk_hw * __init @@ -221,8 +248,6 @@ at91_clk_register_programmable(struct regmap *regmap, if (ret) { kfree(prog); hw = ERR_PTR(ret); - } else { - pmc_register_pck(id); } return hw; diff --git a/drivers/clk/at91/clk-sam9x60-pll.c b/drivers/clk/at91/clk-sam9x60-pll.c index 34e3ab13741a..7020d3bf6e13 100644 --- a/drivers/clk/at91/clk-sam9x60-pll.c +++ b/drivers/clk/at91/clk-sam9x60-pll.c @@ -38,12 +38,14 @@ struct sam9x60_pll_core { struct sam9x60_frac { struct sam9x60_pll_core core; + struct at91_clk_pms pms; u32 frac; u16 mul; }; struct sam9x60_div { struct sam9x60_pll_core core; + struct at91_clk_pms pms; u8 div; }; @@ -75,9 +77,8 @@ static unsigned long sam9x60_frac_pll_recalc_rate(struct clk_hw *hw, ((u64)parent_rate * frac->frac >> 22)); } -static int sam9x60_frac_pll_prepare(struct clk_hw *hw) +static int sam9x60_frac_pll_set(struct sam9x60_pll_core *core) { - struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); struct sam9x60_frac *frac = to_sam9x60_frac(core); struct regmap *regmap = core->regmap; unsigned int val, cfrac, cmul; @@ -141,6 +142,13 @@ unlock: return 0; } +static int sam9x60_frac_pll_prepare(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + + return sam9x60_frac_pll_set(core); +} + static void sam9x60_frac_pll_unprepare(struct clk_hw *hw) { struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); @@ -280,6 +288,25 @@ unlock: return ret; } +static int sam9x60_frac_pll_save_context(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_frac *frac = to_sam9x60_frac(core); + + frac->pms.status = sam9x60_pll_ready(core->regmap, core->id); + + return 0; +} + +static void sam9x60_frac_pll_restore_context(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_frac *frac = to_sam9x60_frac(core); + + if (frac->pms.status) + sam9x60_frac_pll_set(core); +} + static const struct clk_ops sam9x60_frac_pll_ops = { .prepare = sam9x60_frac_pll_prepare, .unprepare = sam9x60_frac_pll_unprepare, @@ -287,6 +314,8 @@ static const struct clk_ops sam9x60_frac_pll_ops = { .recalc_rate = sam9x60_frac_pll_recalc_rate, .round_rate = sam9x60_frac_pll_round_rate, .set_rate = sam9x60_frac_pll_set_rate, + .save_context = sam9x60_frac_pll_save_context, + .restore_context = sam9x60_frac_pll_restore_context, }; static const struct clk_ops sam9x60_frac_pll_ops_chg = { @@ -296,11 +325,12 @@ static const struct clk_ops sam9x60_frac_pll_ops_chg = { .recalc_rate = sam9x60_frac_pll_recalc_rate, .round_rate = sam9x60_frac_pll_round_rate, .set_rate = sam9x60_frac_pll_set_rate_chg, + .save_context = sam9x60_frac_pll_save_context, + .restore_context = sam9x60_frac_pll_restore_context, }; -static int sam9x60_div_pll_prepare(struct clk_hw *hw) +static int sam9x60_div_pll_set(struct sam9x60_pll_core *core) { - struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); struct sam9x60_div *div = to_sam9x60_div(core); struct regmap *regmap = core->regmap; unsigned long flags; @@ -334,6 +364,13 @@ unlock: return 0; } +static int sam9x60_div_pll_prepare(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + + return sam9x60_div_pll_set(core); +} + static void sam9x60_div_pll_unprepare(struct clk_hw *hw) { struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); @@ -482,6 +519,25 @@ unlock: return 0; } +static int sam9x60_div_pll_save_context(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_div *div = to_sam9x60_div(core); + + div->pms.status = sam9x60_div_pll_is_prepared(hw); + + return 0; +} + +static void sam9x60_div_pll_restore_context(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_div *div = to_sam9x60_div(core); + + if (div->pms.status) + sam9x60_div_pll_set(core); +} + static const struct clk_ops sam9x60_div_pll_ops = { .prepare = sam9x60_div_pll_prepare, .unprepare = sam9x60_div_pll_unprepare, @@ -489,6 +545,8 @@ static const struct clk_ops sam9x60_div_pll_ops = { .recalc_rate = sam9x60_div_pll_recalc_rate, .round_rate = sam9x60_div_pll_round_rate, .set_rate = sam9x60_div_pll_set_rate, + .save_context = sam9x60_div_pll_save_context, + .restore_context = sam9x60_div_pll_restore_context, }; static const struct clk_ops sam9x60_div_pll_ops_chg = { @@ -498,6 +556,8 @@ static const struct clk_ops sam9x60_div_pll_ops_chg = { .recalc_rate = sam9x60_div_pll_recalc_rate, .round_rate = sam9x60_div_pll_round_rate, .set_rate = sam9x60_div_pll_set_rate_chg, + .save_context = sam9x60_div_pll_save_context, + .restore_context = sam9x60_div_pll_restore_context, }; struct clk_hw * __init diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c index f83ec0de86c3..80720fd1a9cf 100644 --- a/drivers/clk/at91/clk-system.c +++ b/drivers/clk/at91/clk-system.c @@ -20,6 +20,7 @@ struct clk_system { struct clk_hw hw; struct regmap *regmap; + struct at91_clk_pms pms; u8 id; }; @@ -77,10 +78,29 @@ static int clk_system_is_prepared(struct clk_hw *hw) return !!(status & (1 << sys->id)); } +static int clk_system_save_context(struct clk_hw *hw) +{ + struct clk_system *sys = to_clk_system(hw); + + sys->pms.status = clk_system_is_prepared(hw); + + return 0; +} + +static void clk_system_restore_context(struct clk_hw *hw) +{ + struct clk_system *sys = to_clk_system(hw); + + if (sys->pms.status) + clk_system_prepare(&sys->hw); +} + static const struct clk_ops system_ops = { .prepare = clk_system_prepare, .unprepare = clk_system_unprepare, .is_prepared = clk_system_is_prepared, + .save_context = clk_system_save_context, + .restore_context = clk_system_restore_context, }; struct clk_hw * __init diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c index 31d5c45e30d7..b0696a928aa9 100644 --- a/drivers/clk/at91/clk-usb.c +++ b/drivers/clk/at91/clk-usb.c @@ -24,6 +24,7 @@ struct at91sam9x5_clk_usb { struct clk_hw hw; struct regmap *regmap; + struct at91_clk_pms pms; u32 usbs_mask; u8 num_parents; }; @@ -148,12 +149,38 @@ static int at91sam9x5_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate, return 0; } +static int at91sam9x5_usb_save_context(struct clk_hw *hw) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + struct clk_hw *parent_hw = clk_hw_get_parent(hw); + + usb->pms.parent = at91sam9x5_clk_usb_get_parent(hw); + usb->pms.parent_rate = clk_hw_get_rate(parent_hw); + usb->pms.rate = at91sam9x5_clk_usb_recalc_rate(hw, usb->pms.parent_rate); + + return 0; +} + +static void at91sam9x5_usb_restore_context(struct clk_hw *hw) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + int ret; + + ret = at91sam9x5_clk_usb_set_parent(hw, usb->pms.parent); + if (ret) + return; + + at91sam9x5_clk_usb_set_rate(hw, usb->pms.rate, usb->pms.parent_rate); +} + static const struct clk_ops at91sam9x5_usb_ops = { .recalc_rate = at91sam9x5_clk_usb_recalc_rate, .determine_rate = at91sam9x5_clk_usb_determine_rate, .get_parent = at91sam9x5_clk_usb_get_parent, .set_parent = at91sam9x5_clk_usb_set_parent, .set_rate = at91sam9x5_clk_usb_set_rate, + .save_context = at91sam9x5_usb_save_context, + .restore_context = at91sam9x5_usb_restore_context, }; static int at91sam9n12_clk_usb_enable(struct clk_hw *hw) diff --git a/drivers/clk/at91/clk-utmi.c b/drivers/clk/at91/clk-utmi.c index df9f3fc3b6a6..a22c10d9a1b9 100644 --- a/drivers/clk/at91/clk-utmi.c +++ b/drivers/clk/at91/clk-utmi.c @@ -23,6 +23,7 @@ struct clk_utmi { struct clk_hw hw; struct regmap *regmap_pmc; struct regmap *regmap_sfr; + struct at91_clk_pms pms; }; #define to_clk_utmi(hw) container_of(hw, struct clk_utmi, hw) @@ -113,11 +114,30 @@ static unsigned long clk_utmi_recalc_rate(struct clk_hw *hw, return UTMI_RATE; } +static int clk_utmi_save_context(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + + utmi->pms.status = clk_utmi_is_prepared(hw); + + return 0; +} + +static void clk_utmi_restore_context(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + + if (utmi->pms.status) + clk_utmi_prepare(hw); +} + static const struct clk_ops utmi_ops = { .prepare = clk_utmi_prepare, .unprepare = clk_utmi_unprepare, .is_prepared = clk_utmi_is_prepared, .recalc_rate = clk_utmi_recalc_rate, + .save_context = clk_utmi_save_context, + .restore_context = clk_utmi_restore_context, }; static struct clk_hw * __init @@ -232,10 +252,29 @@ static int clk_utmi_sama7g5_is_prepared(struct clk_hw *hw) return 0; } +static int clk_utmi_sama7g5_save_context(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + + utmi->pms.status = clk_utmi_sama7g5_is_prepared(hw); + + return 0; +} + +static void clk_utmi_sama7g5_restore_context(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + + if (utmi->pms.status) + clk_utmi_sama7g5_prepare(hw); +} + static const struct clk_ops sama7g5_utmi_ops = { .prepare = clk_utmi_sama7g5_prepare, .is_prepared = clk_utmi_sama7g5_is_prepared, .recalc_rate = clk_utmi_recalc_rate, + .save_context = clk_utmi_sama7g5_save_context, + .restore_context = clk_utmi_sama7g5_restore_context, }; struct clk_hw * __init diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c index b40035b011d0..b2806946a77a 100644 --- a/drivers/clk/at91/pmc.c +++ b/drivers/clk/at91/pmc.c @@ -3,6 +3,7 @@ * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> */ +#include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/clkdev.h> #include <linux/clk/at91_pmc.h> @@ -14,8 +15,6 @@ #include <asm/proc-fns.h> -#include <dt-bindings/clock/at91.h> - #include "pmc.h" #define PMC_MAX_IDS 128 @@ -111,147 +110,19 @@ struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem, } #ifdef CONFIG_PM -static struct regmap *pmcreg; - -static u8 registered_ids[PMC_MAX_IDS]; -static u8 registered_pcks[PMC_MAX_PCKS]; - -static struct -{ - u32 scsr; - u32 pcsr0; - u32 uckr; - u32 mor; - u32 mcfr; - u32 pllar; - u32 mckr; - u32 usb; - u32 imr; - u32 pcsr1; - u32 pcr[PMC_MAX_IDS]; - u32 audio_pll0; - u32 audio_pll1; - u32 pckr[PMC_MAX_PCKS]; -} pmc_cache; - -/* - * As Peripheral ID 0 is invalid on AT91 chips, the identifier is stored - * without alteration in the table, and 0 is for unused clocks. - */ -void pmc_register_id(u8 id) -{ - int i; - - for (i = 0; i < PMC_MAX_IDS; i++) { - if (registered_ids[i] == 0) { - registered_ids[i] = id; - break; - } - if (registered_ids[i] == id) - break; - } -} - -/* - * As Programmable Clock 0 is valid on AT91 chips, there is an offset - * of 1 between the stored value and the real clock ID. - */ -void pmc_register_pck(u8 pck) -{ - int i; - - for (i = 0; i < PMC_MAX_PCKS; i++) { - if (registered_pcks[i] == 0) { - registered_pcks[i] = pck + 1; - break; - } - if (registered_pcks[i] == (pck + 1)) - break; - } -} - -static int pmc_suspend(void) +static int at91_pmc_suspend(void) { - int i; - u8 num; - - regmap_read(pmcreg, AT91_PMC_SCSR, &pmc_cache.scsr); - regmap_read(pmcreg, AT91_PMC_PCSR, &pmc_cache.pcsr0); - regmap_read(pmcreg, AT91_CKGR_UCKR, &pmc_cache.uckr); - regmap_read(pmcreg, AT91_CKGR_MOR, &pmc_cache.mor); - regmap_read(pmcreg, AT91_CKGR_MCFR, &pmc_cache.mcfr); - regmap_read(pmcreg, AT91_CKGR_PLLAR, &pmc_cache.pllar); - regmap_read(pmcreg, AT91_PMC_MCKR, &pmc_cache.mckr); - regmap_read(pmcreg, AT91_PMC_USB, &pmc_cache.usb); - regmap_read(pmcreg, AT91_PMC_IMR, &pmc_cache.imr); - regmap_read(pmcreg, AT91_PMC_PCSR1, &pmc_cache.pcsr1); - - for (i = 0; registered_ids[i]; i++) { - regmap_write(pmcreg, AT91_PMC_PCR, - (registered_ids[i] & AT91_PMC_PCR_PID_MASK)); - regmap_read(pmcreg, AT91_PMC_PCR, - &pmc_cache.pcr[registered_ids[i]]); - } - for (i = 0; registered_pcks[i]; i++) { - num = registered_pcks[i] - 1; - regmap_read(pmcreg, AT91_PMC_PCKR(num), &pmc_cache.pckr[num]); - } - - return 0; + return clk_save_context(); } -static bool pmc_ready(unsigned int mask) +static void at91_pmc_resume(void) { - unsigned int status; - - regmap_read(pmcreg, AT91_PMC_SR, &status); - - return ((status & mask) == mask) ? 1 : 0; -} - -static void pmc_resume(void) -{ - int i; - u8 num; - u32 tmp; - u32 mask = AT91_PMC_MCKRDY | AT91_PMC_LOCKA; - - regmap_read(pmcreg, AT91_PMC_MCKR, &tmp); - if (pmc_cache.mckr != tmp) - pr_warn("MCKR was not configured properly by the firmware\n"); - regmap_read(pmcreg, AT91_CKGR_PLLAR, &tmp); - if (pmc_cache.pllar != tmp) - pr_warn("PLLAR was not configured properly by the firmware\n"); - - regmap_write(pmcreg, AT91_PMC_SCER, pmc_cache.scsr); - regmap_write(pmcreg, AT91_PMC_PCER, pmc_cache.pcsr0); - regmap_write(pmcreg, AT91_CKGR_UCKR, pmc_cache.uckr); - regmap_write(pmcreg, AT91_CKGR_MOR, pmc_cache.mor); - regmap_write(pmcreg, AT91_CKGR_MCFR, pmc_cache.mcfr); - regmap_write(pmcreg, AT91_PMC_USB, pmc_cache.usb); - regmap_write(pmcreg, AT91_PMC_IMR, pmc_cache.imr); - regmap_write(pmcreg, AT91_PMC_PCER1, pmc_cache.pcsr1); - - for (i = 0; registered_ids[i]; i++) { - regmap_write(pmcreg, AT91_PMC_PCR, - pmc_cache.pcr[registered_ids[i]] | - AT91_PMC_PCR_CMD); - } - for (i = 0; registered_pcks[i]; i++) { - num = registered_pcks[i] - 1; - regmap_write(pmcreg, AT91_PMC_PCKR(num), pmc_cache.pckr[num]); - } - - if (pmc_cache.uckr & AT91_PMC_UPLLEN) - mask |= AT91_PMC_LOCKU; - - while (!pmc_ready(mask)) - cpu_relax(); + clk_restore_context(); } static struct syscore_ops pmc_syscore_ops = { - .suspend = pmc_suspend, - .resume = pmc_resume, + .suspend = at91_pmc_suspend, + .resume = at91_pmc_resume, }; static const struct of_device_id sama5d2_pmc_dt_ids[] = { @@ -271,11 +142,7 @@ static int __init pmc_register_ops(void) of_node_put(np); return -ENODEV; } - - pmcreg = device_node_to_regmap(np); of_node_put(np); - if (IS_ERR(pmcreg)) - return PTR_ERR(pmcreg); register_syscore_ops(&pmc_syscore_ops); diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h index a49076c804a9..45df094498ce 100644 --- a/drivers/clk/at91/pmc.h +++ b/drivers/clk/at91/pmc.h @@ -13,6 +13,8 @@ #include <linux/regmap.h> #include <linux/spinlock.h> +#include <dt-bindings/clock/at91.h> + extern spinlock_t pmc_pcr_lock; struct pmc_data { @@ -98,6 +100,20 @@ struct clk_pcr_layout { u32 pid_mask; }; +/** + * struct at91_clk_pms - Power management state for AT91 clock + * @rate: clock rate + * @parent_rate: clock parent rate + * @status: clock status (enabled or disabled) + * @parent: clock parent index + */ +struct at91_clk_pms { + unsigned long rate; + unsigned long parent_rate; + unsigned int status; + unsigned int parent; +}; + #define field_get(_mask, _reg) (((_reg) & (_mask)) >> (ffs(_mask) - 1)) #define field_prep(_mask, _val) (((_val) << (ffs(_mask) - 1)) & (_mask)) @@ -248,12 +264,4 @@ struct clk_hw * __init at91_clk_sama7g5_register_utmi(struct regmap *regmap, const char *name, const char *parent_name); -#ifdef CONFIG_PM -void pmc_register_id(u8 id); -void pmc_register_pck(u8 pck); -#else -static inline void pmc_register_id(u8 id) {} -static inline void pmc_register_pck(u8 pck) {} -#endif - #endif /* __PMC_H_ */ |