diff options
Diffstat (limited to 'drivers/clk/at91/clk-generated.c')
| -rw-r--r-- | drivers/clk/at91/clk-generated.c | 46 |
1 files changed, 37 insertions, 9 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; |