diff options
Diffstat (limited to 'drivers/clk/sifive/sifive-prci.c')
| -rw-r--r-- | drivers/clk/sifive/sifive-prci.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/clk/sifive/sifive-prci.c b/drivers/clk/sifive/sifive-prci.c index 1490b01ce629..9997a3fa4a38 100644 --- a/drivers/clk/sifive/sifive-prci.c +++ b/drivers/clk/sifive/sifive-prci.c @@ -453,6 +453,47 @@ void sifive_prci_hfpclkpllsel_use_hfpclkpll(struct __prci_data *pd) r = __prci_readl(pd, PRCI_HFPCLKPLLSEL_OFFSET); /* barrier */ } +/* PCIE AUX clock APIs for enable, disable. */ +int sifive_prci_pcie_aux_clock_is_enabled(struct clk_hw *hw) +{ + struct __prci_clock *pc = clk_hw_to_prci_clock(hw); + struct __prci_data *pd = pc->pd; + u32 r; + + r = __prci_readl(pd, PRCI_PCIE_AUX_OFFSET); + + if (r & PRCI_PCIE_AUX_EN_MASK) + return 1; + else + return 0; +} + +int sifive_prci_pcie_aux_clock_enable(struct clk_hw *hw) +{ + struct __prci_clock *pc = clk_hw_to_prci_clock(hw); + struct __prci_data *pd = pc->pd; + u32 r __maybe_unused; + + if (sifive_prci_pcie_aux_clock_is_enabled(hw)) + return 0; + + __prci_writel(1, PRCI_PCIE_AUX_OFFSET, pd); + r = __prci_readl(pd, PRCI_PCIE_AUX_OFFSET); /* barrier */ + + return 0; +} + +void sifive_prci_pcie_aux_clock_disable(struct clk_hw *hw) +{ + struct __prci_clock *pc = clk_hw_to_prci_clock(hw); + struct __prci_data *pd = pc->pd; + u32 r __maybe_unused; + + __prci_writel(0, PRCI_PCIE_AUX_OFFSET, pd); + r = __prci_readl(pd, PRCI_PCIE_AUX_OFFSET); /* barrier */ + +} + /** * __prci_register_clocks() - register clock controls in the PRCI * @dev: Linux struct device |