diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-01-12 16:48:01 +1100 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2018-01-26 16:22:48 -0800 |
| commit | 6671507f0fbd582b4003f837ab791d03ade8e0f4 (patch) | |
| tree | 87615147b69008ac30cfcff53765d749fc73e979 /drivers/clk/clk-aspeed.c | |
| parent | accf475a5ece972af58c81e0742035ed90ad41d2 (diff) | |
| download | linux-rt-6671507f0fbd582b4003f837ab791d03ade8e0f4.tar.gz | |
clk: aspeed: Handle inverse polarity of USB port 1 clock gate
The USB port 1 clock gate control has an inversed polarity
from all the other clock gates in the chip. This makes the
aspeed_clk_{enable,disable} functions honor the flag
CLK_GATE_SET_TO_DISABLE and set that flag appropriately
so it's set for all clocks except USB port 1.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/clk-aspeed.c')
| -rw-r--r-- | drivers/clk/clk-aspeed.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/clk/clk-aspeed.c b/drivers/clk/clk-aspeed.c index f9b9688cbd1f..9f7f931d6b2f 100644 --- a/drivers/clk/clk-aspeed.c +++ b/drivers/clk/clk-aspeed.c @@ -211,6 +211,7 @@ static int aspeed_clk_enable(struct clk_hw *hw) unsigned long flags; u32 clk = BIT(gate->clock_idx); u32 rst = BIT(gate->reset_idx); + u32 enval; spin_lock_irqsave(gate->lock, flags); @@ -223,7 +224,8 @@ static int aspeed_clk_enable(struct clk_hw *hw) } /* Enable clock */ - regmap_update_bits(gate->map, ASPEED_CLK_STOP_CTRL, clk, 0); + enval = (gate->flags & CLK_GATE_SET_TO_DISABLE) ? 0 : clk; + regmap_update_bits(gate->map, ASPEED_CLK_STOP_CTRL, clk, enval); if (gate->reset_idx >= 0) { /* A delay of 10ms is specified by the ASPEED docs */ @@ -243,10 +245,12 @@ static void aspeed_clk_disable(struct clk_hw *hw) struct aspeed_clk_gate *gate = to_aspeed_clk_gate(hw); unsigned long flags; u32 clk = BIT(gate->clock_idx); + u32 enval; spin_lock_irqsave(gate->lock, flags); - regmap_update_bits(gate->map, ASPEED_CLK_STOP_CTRL, clk, clk); + enval = (gate->flags & CLK_GATE_SET_TO_DISABLE) ? clk : 0; + regmap_update_bits(gate->map, ASPEED_CLK_STOP_CTRL, clk, enval); spin_unlock_irqrestore(gate->lock, flags); } @@ -478,7 +482,12 @@ static int aspeed_clk_probe(struct platform_device *pdev) for (i = 0; i < ARRAY_SIZE(aspeed_gates); i++) { const struct aspeed_gate_data *gd = &aspeed_gates[i]; + u32 gate_flags; + /* Special case: the USB port 1 clock (bit 14) is always + * working the opposite way from the other ones. + */ + gate_flags = (gd->clock_idx == 14) ? 0 : CLK_GATE_SET_TO_DISABLE; hw = aspeed_clk_hw_register_gate(dev, gd->name, gd->parent_name, @@ -486,7 +495,7 @@ static int aspeed_clk_probe(struct platform_device *pdev) map, gd->clock_idx, gd->reset_idx, - CLK_GATE_SET_TO_DISABLE, + gate_flags, &aspeed_clk_lock); if (IS_ERR(hw)) return PTR_ERR(hw); |