clk: tegra: Introduce divider mask and shift helpers

Add div{m,n,p}_shift() and div{m,n,p}_mask_shifted() helpers to make the
code that modifies the m-, n- and p-divider fields of PLLs shorter and
easier to read.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c
index 357911303315cc44e2a19eb4b43b1a4a068273fd..1187187a1cf2dea31c2798162036d746e52fb424 100644 (file)
--- a/drivers/clk/tegra/clk-pll.c
+++ b/drivers/clk/tegra/clk-pll.c
@@ -183,6 +183,14 @@
 #define divp_mask(p) (p->params->flags & TEGRA_PLLU ? PLLU_POST_DIVP_MASK :\
                      mask(p->params->div_nmp->divp_width))
 
+#define divm_shift(p) (p)->params->div_nmp->divm_shift
+#define divn_shift(p) (p)->params->div_nmp->divn_shift
+#define divp_shift(p) (p)->params->div_nmp->divp_shift
+
+#define divm_mask_shifted(p) (divm_mask(p) << divm_shift(p))
+#define divn_mask_shifted(p) (divn_mask(p) << divn_shift(p))
+#define divp_mask_shifted(p) (divp_mask(p) << divp_shift(p))
+
 #define divm_max(p) (divm_mask(p))
 #define divn_max(p) (divn_mask(p))
 #define divp_max(p) (1 << (divp_mask(p)))
@@ -476,13 +484,12 @@ static void _update_pll_mnp(struct tegra_clk_pll *pll,
        } else {
                val = pll_readl_base(pll);
 
-               val &= ~((divm_mask(pll) << div_nmp->divm_shift) |
-                (divn_mask(pll) << div_nmp->divn_shift) |
-                (divp_mask(pll) << div_nmp->divp_shift));
+               val &= ~(divm_mask_shifted(pll) | divn_mask_shifted(pll) |
+                        divp_mask_shifted(pll));
 
-               val |= ((cfg->m << div_nmp->divm_shift) |
-                       (cfg->n << div_nmp->divn_shift) |
-                       (cfg->p << div_nmp->divp_shift));
+               val |= (cfg->m << divm_shift(pll)) |
+                      (cfg->n << divn_shift(pll)) |
+                      (cfg->p << divp_shift(pll));
 
                pll_writel_base(val, pll);
        }
@@ -730,13 +737,12 @@ static int clk_plle_enable(struct clk_hw *hw)
        if (pll->params->flags & TEGRA_PLLE_CONFIGURE) {
                /* configure dividers */
                val = pll_readl_base(pll);
-               val &= ~(divp_mask(pll) << PLLE_BASE_DIVP_SHIFT |
-                        divn_mask(pll) << PLLE_BASE_DIVN_SHIFT |
-                        divm_mask(pll) << PLLE_BASE_DIVM_SHIFT);
+               val &= ~(divp_mask_shifted(pll) | divn_mask_shifted(pll) |
+                        divm_mask_shifted(pll));
                val &= ~(PLLE_BASE_DIVCML_MASK << PLLE_BASE_DIVCML_SHIFT);
-               val |= sel.m << pll->params->div_nmp->divm_shift;
-               val |= sel.n << pll->params->div_nmp->divn_shift;
-               val |= sel.p << pll->params->div_nmp->divp_shift;
+               val |= sel.m << divm_shift(pll);
+               val |= sel.n << divn_shift(pll);
+               val |= sel.p << divp_shift(pll);
                val |= sel.cpcon << PLLE_BASE_DIVCML_SHIFT;
                pll_writel_base(val, pll);
        }
@@ -1295,12 +1301,11 @@ static int clk_plle_tegra114_enable(struct clk_hw *hw)
        pll_writel(val, PLLE_SS_CTRL, pll);
 
        val = pll_readl_base(pll);
-       val &= ~(divp_mask(pll) << PLLE_BASE_DIVP_SHIFT |
-                divn_mask(pll) << PLLE_BASE_DIVN_SHIFT |
-                divm_mask(pll) << PLLE_BASE_DIVM_SHIFT);
+       val &= ~(divp_mask_shifted(pll) | divn_mask_shifted(pll) |
+                divm_mask_shifted(pll));
        val &= ~(PLLE_BASE_DIVCML_MASK << PLLE_BASE_DIVCML_SHIFT);
-       val |= sel.m << pll->params->div_nmp->divm_shift;
-       val |= sel.n << pll->params->div_nmp->divn_shift;
+       val |= sel.m << divm_shift(pll);
+       val |= sel.n << divn_shift(pll);
        val |= sel.cpcon << PLLE_BASE_DIVCML_SHIFT;
        pll_writel_base(val, pll);
        udelay(1);
@@ -1575,9 +1580,8 @@ struct clk *tegra_clk_register_pllre(const char *name, const char *parent_name,
                int m;
 
                m = _pll_fixed_mdiv(pll_params, parent_rate);
-               val = m << PLL_BASE_DIVM_SHIFT;
-               val |= (pll_params->vco_min / parent_rate)
-                               << PLL_BASE_DIVN_SHIFT;
+               val = m << divm_shift(pll);
+               val |= (pll_params->vco_min / parent_rate) << divn_shift(pll);
                pll_writel_base(val, pll);
        }