diff options
| author | Abhishek Sahu <absahu@codeaurora.org> | 2017-09-28 20:50:49 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2017-12-14 03:54:09 +0300 |
| commit | 1c3541145cbfd1cf631602bd7494dd03260e8533 (patch) | |
| tree | 7eb2828cf9832619f8bc45c321fe05b1f18dec3a /drivers/clk/qcom | |
| parent | c23e8a1f6016bd35599c35052d39bb9e879351ad (diff) | |
| download | linux-1c3541145cbfd1cf631602bd7494dd03260e8533.tar.xz | |
clk: qcom: support for 2 bit PLL post divider
Current PLL driver only supports 4 bit PLL post divider so
modified the PLL divider operations to support 2 bit PLL
post divider.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/qcom')
| -rw-r--r-- | drivers/clk/qcom/clk-alpha-pll.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c index 3a38861a7944..2de66b98e997 100644 --- a/drivers/clk/qcom/clk-alpha-pll.c +++ b/drivers/clk/qcom/clk-alpha-pll.c @@ -45,7 +45,7 @@ #define PLL_USER_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_USER_CTL]) # define PLL_POST_DIV_SHIFT 8 -# define PLL_POST_DIV_MASK 0xf +# define PLL_POST_DIV_MASK(p) GENMASK((p)->width, 0) # define PLL_ALPHA_EN BIT(24) # define PLL_ALPHA_MODE BIT(25) # define PLL_VCO_SHIFT 20 @@ -750,7 +750,7 @@ clk_alpha_pll_postdiv_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &ctl); ctl >>= PLL_POST_DIV_SHIFT; - ctl &= PLL_POST_DIV_MASK; + ctl &= PLL_POST_DIV_MASK(pll); return parent_rate >> fls(ctl); } @@ -764,13 +764,26 @@ static const struct clk_div_table clk_alpha_div_table[] = { { } }; +static const struct clk_div_table clk_alpha_2bit_div_table[] = { + { 0x0, 1 }, + { 0x1, 2 }, + { 0x3, 4 }, + { } +}; + static long clk_alpha_pll_postdiv_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate) { struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw); + const struct clk_div_table *table; + + if (pll->width == 2) + table = clk_alpha_2bit_div_table; + else + table = clk_alpha_div_table; - return divider_round_rate(hw, rate, prate, clk_alpha_div_table, + return divider_round_rate(hw, rate, prate, table, pll->width, CLK_DIVIDER_POWER_OF_TWO); } @@ -784,7 +797,7 @@ static int clk_alpha_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, div = DIV_ROUND_UP_ULL((u64)parent_rate, rate) - 1; return regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll), - PLL_POST_DIV_MASK << PLL_POST_DIV_SHIFT, + PLL_POST_DIV_MASK(pll) << PLL_POST_DIV_SHIFT, div << PLL_POST_DIV_SHIFT); } |