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[82.243.161.21]) by smtp.googlemail.com with ESMTPSA id k5sm6337694wmg.47.2018.02.14.05.43.44 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 14 Feb 2018 05:43:44 -0800 (PST) From: Jerome Brunet To: Michael Turquette , Stephen Boyd Cc: Jerome Brunet , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/8] clk: divider: export clk_div_mask() helper Date: Wed, 14 Feb 2018 14:43:33 +0100 Message-Id: <20180214134340.17242-2-jbrunet@baylibre.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180214134340.17242-1-jbrunet@baylibre.com> References: <20180214134340.17242-1-jbrunet@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Export clk_div_mask() in clk-provider header so every clock providers derived from the generic clock divider may share the definition instead of redefining it. Signed-off-by: Jerome Brunet --- I have 's/div_mask/clk_div_mask' to avoid the conflict with tegra's divider, which also defines the macro div_mask() but does not actually derives from the generic divider. drivers/clk/clk-divider.c | 24 +++++++++++------------- include/linux/clk-provider.h | 1 + 2 files changed, 12 insertions(+), 13 deletions(-) -- 2.14.3 diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c index b49942b9fe50..3c98d2650fa3 100644 --- a/drivers/clk/clk-divider.c +++ b/drivers/clk/clk-divider.c @@ -28,12 +28,10 @@ * parent - fixed parent. No clk_set_parent support */ -#define div_mask(width) ((1 << (width)) - 1) - static unsigned int _get_table_maxdiv(const struct clk_div_table *table, u8 width) { - unsigned int maxdiv = 0, mask = div_mask(width); + unsigned int maxdiv = 0, mask = clk_div_mask(width); const struct clk_div_table *clkt; for (clkt = table; clkt->div; clkt++) @@ -57,12 +55,12 @@ static unsigned int _get_maxdiv(const struct clk_div_table *table, u8 width, unsigned long flags) { if (flags & CLK_DIVIDER_ONE_BASED) - return div_mask(width); + return clk_div_mask(width); if (flags & CLK_DIVIDER_POWER_OF_TWO) - return 1 << div_mask(width); + return 1 << clk_div_mask(width); if (table) return _get_table_maxdiv(table, width); - return div_mask(width) + 1; + return clk_div_mask(width) + 1; } static unsigned int _get_table_div(const struct clk_div_table *table, @@ -84,7 +82,7 @@ static unsigned int _get_div(const struct clk_div_table *table, if (flags & CLK_DIVIDER_POWER_OF_TWO) return 1 << val; if (flags & CLK_DIVIDER_MAX_AT_ZERO) - return val ? val : div_mask(width) + 1; + return val ? val : clk_div_mask(width) + 1; if (table) return _get_table_div(table, val); return val + 1; @@ -109,7 +107,7 @@ static unsigned int _get_val(const struct clk_div_table *table, if (flags & CLK_DIVIDER_POWER_OF_TWO) return __ffs(div); if (flags & CLK_DIVIDER_MAX_AT_ZERO) - return (div == div_mask(width) + 1) ? 0 : div; + return (div == clk_div_mask(width) + 1) ? 0 : div; if (table) return _get_table_val(table, div); return div - 1; @@ -141,7 +139,7 @@ static unsigned long clk_divider_recalc_rate(struct clk_hw *hw, unsigned int val; val = clk_readl(divider->reg) >> divider->shift; - val &= div_mask(divider->width); + val &= clk_div_mask(divider->width); return divider_recalc_rate(hw, parent_rate, val, divider->table, divider->flags, divider->width); @@ -353,7 +351,7 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate, /* if read only, just return current value */ if (divider->flags & CLK_DIVIDER_READ_ONLY) { bestdiv = clk_readl(divider->reg) >> divider->shift; - bestdiv &= div_mask(divider->width); + bestdiv &= clk_div_mask(divider->width); bestdiv = _get_div(divider->table, bestdiv, divider->flags, divider->width); return DIV_ROUND_UP_ULL((u64)*prate, bestdiv); @@ -376,7 +374,7 @@ int divider_get_val(unsigned long rate, unsigned long parent_rate, value = _get_val(table, div, flags, width); - return min_t(unsigned int, value, div_mask(width)); + return min_t(unsigned int, value, clk_div_mask(width)); } EXPORT_SYMBOL_GPL(divider_get_val); @@ -399,10 +397,10 @@ static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate, __acquire(divider->lock); if (divider->flags & CLK_DIVIDER_HIWORD_MASK) { - val = div_mask(divider->width) << (divider->shift + 16); + val = clk_div_mask(divider->width) << (divider->shift + 16); } else { val = clk_readl(divider->reg); - val &= ~(div_mask(divider->width) << divider->shift); + val &= ~(clk_div_mask(divider->width) << divider->shift); } val |= (u32)value << divider->shift; clk_writel(val, divider->reg); diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index f711be6e8c44..d8ba26d03332 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -399,6 +399,7 @@ struct clk_divider { spinlock_t *lock; }; +#define clk_div_mask(width) ((1 << (width)) - 1) #define to_clk_divider(_hw) container_of(_hw, struct clk_divider, hw) #define CLK_DIVIDER_ONE_BASED BIT(0)