diff options
| author | maxims@google.com <maxims@google.com> | 2017-04-17 19:00:33 (GMT) |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-05-08 15:57:35 (GMT) |
| commit | defb184904c05df8ca49bd0265969ce72cb92401 (patch) | |
| tree | 2ef2073c46d5a2fa68a512486d9f559d78bda6cd /drivers/clk/aspeed/clk_ast2500.c | |
| parent | 3b95902d47f89f95242ac143cd2a9ed1fd196157 (diff) | |
| download | u-boot-defb184904c05df8ca49bd0265969ce72cb92401.tar.xz | |
aspeed: Refactor SCU to use consistent mask & shift
Refactor SCU header to use consistent Mask & Shift values.
Now, consistently, to read value from SCU register, mask needs
to be applied before shift.
Signed-off-by: Maxim Sloyko <maxims@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/clk/aspeed/clk_ast2500.c')
| -rw-r--r-- | drivers/clk/aspeed/clk_ast2500.c | 39 |
1 files changed, 19 insertions, 20 deletions
diff --git a/drivers/clk/aspeed/clk_ast2500.c b/drivers/clk/aspeed/clk_ast2500.c index 7b4b5c6..ccf47a1 100644 --- a/drivers/clk/aspeed/clk_ast2500.c +++ b/drivers/clk/aspeed/clk_ast2500.c @@ -52,11 +52,11 @@ struct ast2500_div_config { */ static ulong ast2500_get_mpll_rate(ulong clkin, u32 mpll_reg) { - const ulong num = (mpll_reg >> SCU_MPLL_NUM_SHIFT) & SCU_MPLL_NUM_MASK; - const ulong denum = (mpll_reg >> SCU_MPLL_DENUM_SHIFT) - & SCU_MPLL_DENUM_MASK; - const ulong post_div = (mpll_reg >> SCU_MPLL_POST_SHIFT) - & SCU_MPLL_POST_MASK; + const ulong num = (mpll_reg & SCU_MPLL_NUM_MASK) >> SCU_MPLL_NUM_SHIFT; + const ulong denum = (mpll_reg & SCU_MPLL_DENUM_MASK) + >> SCU_MPLL_DENUM_SHIFT; + const ulong post_div = (mpll_reg & SCU_MPLL_POST_MASK) + >> SCU_MPLL_POST_SHIFT; return (clkin * ((num + 1) / (denum + 1))) / (post_div + 1); } @@ -67,11 +67,11 @@ static ulong ast2500_get_mpll_rate(ulong clkin, u32 mpll_reg) */ static ulong ast2500_get_hpll_rate(ulong clkin, u32 hpll_reg) { - const ulong num = (hpll_reg >> SCU_HPLL_NUM_SHIFT) & SCU_HPLL_NUM_MASK; - const ulong denum = (hpll_reg >> SCU_HPLL_DENUM_SHIFT) - & SCU_HPLL_DENUM_MASK; - const ulong post_div = (hpll_reg >> SCU_HPLL_POST_SHIFT) - & SCU_HPLL_POST_MASK; + const ulong num = (hpll_reg & SCU_HPLL_NUM_MASK) >> SCU_HPLL_NUM_SHIFT; + const ulong denum = (hpll_reg & SCU_HPLL_DENUM_MASK) + >> SCU_HPLL_DENUM_SHIFT; + const ulong post_div = (hpll_reg & SCU_HPLL_POST_MASK) + >> SCU_HPLL_POST_SHIFT; return (clkin * ((num + 1) / (denum + 1))) / (post_div + 1); } @@ -136,11 +136,11 @@ static ulong ast2500_clk_get_rate(struct clk *clk) case BCLK_PCLK: { ulong apb_div = 4 + 4 * ((readl(&priv->scu->clk_sel1) - >> SCU_PCLK_DIV_SHIFT) & - SCU_PCLK_DIV_MASK); + & SCU_PCLK_DIV_MASK) + >> SCU_PCLK_DIV_SHIFT); rate = ast2500_get_hpll_rate(clkin, - readl(&priv->scu-> - h_pll_param)); + readl(&priv-> + scu->h_pll_param)); rate = rate / apb_div; } break; @@ -223,17 +223,16 @@ static ulong ast2500_configure_ddr(struct ast2500_scu *scu, ulong rate) ulong clkin = ast2500_get_clkin(scu); u32 mpll_reg; struct ast2500_div_config div_cfg = { - .num = SCU_MPLL_NUM_MASK, - .denum = SCU_MPLL_DENUM_MASK, - .post_div = SCU_MPLL_POST_MASK + .num = (SCU_MPLL_NUM_MASK >> SCU_MPLL_NUM_SHIFT), + .denum = (SCU_MPLL_DENUM_MASK >> SCU_MPLL_DENUM_SHIFT), + .post_div = (SCU_MPLL_POST_MASK >> SCU_MPLL_POST_SHIFT), }; ast2500_calc_clock_config(clkin, rate, &div_cfg); mpll_reg = readl(&scu->m_pll_param); - mpll_reg &= ~((SCU_MPLL_POST_MASK << SCU_MPLL_POST_SHIFT) - | (SCU_MPLL_NUM_MASK << SCU_MPLL_NUM_SHIFT) - | (SCU_MPLL_DENUM_MASK << SCU_MPLL_DENUM_SHIFT)); + mpll_reg &= ~(SCU_MPLL_POST_MASK | SCU_MPLL_NUM_MASK + | SCU_MPLL_DENUM_MASK); mpll_reg |= (div_cfg.post_div << SCU_MPLL_POST_SHIFT) | (div_cfg.num << SCU_MPLL_NUM_SHIFT) | (div_cfg.denum << SCU_MPLL_DENUM_SHIFT); |