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@@ -18,26 +18,56 @@
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#include "common.h"
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#include "common.h"
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#define CORE_CLK_DIV_RATIO_MASK 0xff
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#define CORE_CLK_DIV_RATIO_MASK 0xff
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-#define CORE_CLK_DIV_RATIO_RELOAD BIT(8)
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-#define CORE_CLK_DIV_ENABLE_OFFSET 24
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-#define CORE_CLK_DIV_RATIO_OFFSET 0x8
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+/*
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+ * This structure describes the hardware details (bit offset and mask)
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+ * to configure one particular core divider clock. Those hardware
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+ * details may differ from one SoC to another. This structure is
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+ * therefore typically instantiated statically to describe the
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+ * hardware details.
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+ */
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struct clk_corediv_desc {
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struct clk_corediv_desc {
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unsigned int mask;
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unsigned int mask;
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unsigned int offset;
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unsigned int offset;
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unsigned int fieldbit;
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unsigned int fieldbit;
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};
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};
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+/*
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+ * This structure describes the hardware details to configure the core
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+ * divider clocks on a given SoC. Amongst others, it points to the
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+ * array of core divider clock descriptors for this SoC, as well as
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+ * the corresponding operations to manipulate them.
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+ */
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+struct clk_corediv_soc_desc {
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+ const struct clk_corediv_desc *descs;
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+ unsigned int ndescs;
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+ const struct clk_ops ops;
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+ u32 ratio_reload;
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+ u32 enable_bit_offset;
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+ u32 ratio_offset;
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+};
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+
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+/*
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+ * This structure represents one core divider clock for the clock
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+ * framework, and is dynamically allocated for each core divider clock
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+ * existing in the current SoC.
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+ */
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struct clk_corediv {
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struct clk_corediv {
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struct clk_hw hw;
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struct clk_hw hw;
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void __iomem *reg;
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void __iomem *reg;
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- struct clk_corediv_desc desc;
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+ const struct clk_corediv_desc *desc;
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+ const struct clk_corediv_soc_desc *soc_desc;
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spinlock_t lock;
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spinlock_t lock;
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};
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};
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static struct clk_onecell_data clk_data;
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static struct clk_onecell_data clk_data;
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-static const struct clk_corediv_desc mvebu_corediv_desc[] __initconst = {
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+/*
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+ * Description of the core divider clocks available. For now, we
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+ * support only NAND, and it is available at the same register
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+ * locations regardless of the SoC.
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+ */
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+static const struct clk_corediv_desc mvebu_corediv_desc[] = {
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{ .mask = 0x3f, .offset = 8, .fieldbit = 1 }, /* NAND clock */
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{ .mask = 0x3f, .offset = 8, .fieldbit = 1 }, /* NAND clock */
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};
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};
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@@ -46,8 +76,9 @@ static const struct clk_corediv_desc mvebu_corediv_desc[] __initconst = {
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static int clk_corediv_is_enabled(struct clk_hw *hwclk)
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static int clk_corediv_is_enabled(struct clk_hw *hwclk)
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{
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{
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struct clk_corediv *corediv = to_corediv_clk(hwclk);
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struct clk_corediv *corediv = to_corediv_clk(hwclk);
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- struct clk_corediv_desc *desc = &corediv->desc;
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- u32 enable_mask = BIT(desc->fieldbit) << CORE_CLK_DIV_ENABLE_OFFSET;
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+ const struct clk_corediv_soc_desc *soc_desc = corediv->soc_desc;
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+ const struct clk_corediv_desc *desc = corediv->desc;
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+ u32 enable_mask = BIT(desc->fieldbit) << soc_desc->enable_bit_offset;
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return !!(readl(corediv->reg) & enable_mask);
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return !!(readl(corediv->reg) & enable_mask);
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}
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}
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@@ -55,14 +86,15 @@ static int clk_corediv_is_enabled(struct clk_hw *hwclk)
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static int clk_corediv_enable(struct clk_hw *hwclk)
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static int clk_corediv_enable(struct clk_hw *hwclk)
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{
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{
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struct clk_corediv *corediv = to_corediv_clk(hwclk);
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struct clk_corediv *corediv = to_corediv_clk(hwclk);
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- struct clk_corediv_desc *desc = &corediv->desc;
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+ const struct clk_corediv_soc_desc *soc_desc = corediv->soc_desc;
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+ const struct clk_corediv_desc *desc = corediv->desc;
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unsigned long flags = 0;
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unsigned long flags = 0;
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u32 reg;
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u32 reg;
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spin_lock_irqsave(&corediv->lock, flags);
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spin_lock_irqsave(&corediv->lock, flags);
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reg = readl(corediv->reg);
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reg = readl(corediv->reg);
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- reg |= (BIT(desc->fieldbit) << CORE_CLK_DIV_ENABLE_OFFSET);
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+ reg |= (BIT(desc->fieldbit) << soc_desc->enable_bit_offset);
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writel(reg, corediv->reg);
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writel(reg, corediv->reg);
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spin_unlock_irqrestore(&corediv->lock, flags);
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spin_unlock_irqrestore(&corediv->lock, flags);
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@@ -73,14 +105,15 @@ static int clk_corediv_enable(struct clk_hw *hwclk)
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static void clk_corediv_disable(struct clk_hw *hwclk)
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static void clk_corediv_disable(struct clk_hw *hwclk)
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{
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{
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struct clk_corediv *corediv = to_corediv_clk(hwclk);
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struct clk_corediv *corediv = to_corediv_clk(hwclk);
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- struct clk_corediv_desc *desc = &corediv->desc;
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+ const struct clk_corediv_soc_desc *soc_desc = corediv->soc_desc;
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+ const struct clk_corediv_desc *desc = corediv->desc;
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unsigned long flags = 0;
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unsigned long flags = 0;
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u32 reg;
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u32 reg;
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spin_lock_irqsave(&corediv->lock, flags);
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spin_lock_irqsave(&corediv->lock, flags);
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reg = readl(corediv->reg);
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reg = readl(corediv->reg);
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- reg &= ~(BIT(desc->fieldbit) << CORE_CLK_DIV_ENABLE_OFFSET);
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+ reg &= ~(BIT(desc->fieldbit) << soc_desc->enable_bit_offset);
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writel(reg, corediv->reg);
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writel(reg, corediv->reg);
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spin_unlock_irqrestore(&corediv->lock, flags);
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spin_unlock_irqrestore(&corediv->lock, flags);
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@@ -90,10 +123,11 @@ static unsigned long clk_corediv_recalc_rate(struct clk_hw *hwclk,
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unsigned long parent_rate)
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unsigned long parent_rate)
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{
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{
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struct clk_corediv *corediv = to_corediv_clk(hwclk);
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struct clk_corediv *corediv = to_corediv_clk(hwclk);
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- struct clk_corediv_desc *desc = &corediv->desc;
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+ const struct clk_corediv_soc_desc *soc_desc = corediv->soc_desc;
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+ const struct clk_corediv_desc *desc = corediv->desc;
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u32 reg, div;
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u32 reg, div;
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- reg = readl(corediv->reg + CORE_CLK_DIV_RATIO_OFFSET);
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+ reg = readl(corediv->reg + soc_desc->ratio_offset);
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div = (reg >> desc->offset) & desc->mask;
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div = (reg >> desc->offset) & desc->mask;
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return parent_rate / div;
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return parent_rate / div;
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}
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}
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@@ -117,7 +151,8 @@ static int clk_corediv_set_rate(struct clk_hw *hwclk, unsigned long rate,
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unsigned long parent_rate)
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unsigned long parent_rate)
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{
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{
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struct clk_corediv *corediv = to_corediv_clk(hwclk);
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struct clk_corediv *corediv = to_corediv_clk(hwclk);
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- struct clk_corediv_desc *desc = &corediv->desc;
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+ const struct clk_corediv_soc_desc *soc_desc = corediv->soc_desc;
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+ const struct clk_corediv_desc *desc = corediv->desc;
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unsigned long flags = 0;
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unsigned long flags = 0;
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u32 reg, div;
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u32 reg, div;
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@@ -126,17 +161,17 @@ static int clk_corediv_set_rate(struct clk_hw *hwclk, unsigned long rate,
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spin_lock_irqsave(&corediv->lock, flags);
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spin_lock_irqsave(&corediv->lock, flags);
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/* Write new divider to the divider ratio register */
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/* Write new divider to the divider ratio register */
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- reg = readl(corediv->reg + CORE_CLK_DIV_RATIO_OFFSET);
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+ reg = readl(corediv->reg + soc_desc->ratio_offset);
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reg &= ~(desc->mask << desc->offset);
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reg &= ~(desc->mask << desc->offset);
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reg |= (div & desc->mask) << desc->offset;
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reg |= (div & desc->mask) << desc->offset;
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- writel(reg, corediv->reg + CORE_CLK_DIV_RATIO_OFFSET);
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+ writel(reg, corediv->reg + soc_desc->ratio_offset);
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/* Set reload-force for this clock */
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/* Set reload-force for this clock */
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reg = readl(corediv->reg) | BIT(desc->fieldbit);
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reg = readl(corediv->reg) | BIT(desc->fieldbit);
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writel(reg, corediv->reg);
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writel(reg, corediv->reg);
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/* Now trigger the clock update */
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/* Now trigger the clock update */
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- reg = readl(corediv->reg) | CORE_CLK_DIV_RATIO_RELOAD;
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+ reg = readl(corediv->reg) | soc_desc->ratio_reload;
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writel(reg, corediv->reg);
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writel(reg, corediv->reg);
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/*
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/*
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@@ -144,7 +179,7 @@ static int clk_corediv_set_rate(struct clk_hw *hwclk, unsigned long rate,
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* ratios request and the reload request.
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* ratios request and the reload request.
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*/
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*/
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udelay(1000);
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udelay(1000);
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- reg &= ~(CORE_CLK_DIV_RATIO_MASK | CORE_CLK_DIV_RATIO_RELOAD);
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+ reg &= ~(CORE_CLK_DIV_RATIO_MASK | soc_desc->ratio_reload);
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writel(reg, corediv->reg);
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writel(reg, corediv->reg);
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udelay(1000);
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udelay(1000);
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@@ -153,16 +188,37 @@ static int clk_corediv_set_rate(struct clk_hw *hwclk, unsigned long rate,
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return 0;
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return 0;
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}
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}
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-static const struct clk_ops corediv_ops = {
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- .enable = clk_corediv_enable,
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- .disable = clk_corediv_disable,
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- .is_enabled = clk_corediv_is_enabled,
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- .recalc_rate = clk_corediv_recalc_rate,
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- .round_rate = clk_corediv_round_rate,
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- .set_rate = clk_corediv_set_rate,
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+static const struct clk_corediv_soc_desc armada370_corediv_soc = {
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+ .descs = mvebu_corediv_desc,
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+ .ndescs = ARRAY_SIZE(mvebu_corediv_desc),
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+ .ops = {
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+ .enable = clk_corediv_enable,
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+ .disable = clk_corediv_disable,
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+ .is_enabled = clk_corediv_is_enabled,
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+ .recalc_rate = clk_corediv_recalc_rate,
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+ .round_rate = clk_corediv_round_rate,
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+ .set_rate = clk_corediv_set_rate,
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+ },
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+ .ratio_reload = BIT(8),
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+ .enable_bit_offset = 24,
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+ .ratio_offset = 0x8,
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+};
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+
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+static const struct clk_corediv_soc_desc armada375_corediv_soc = {
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+ .descs = mvebu_corediv_desc,
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+ .ndescs = ARRAY_SIZE(mvebu_corediv_desc),
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+ .ops = {
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+ .recalc_rate = clk_corediv_recalc_rate,
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+ .round_rate = clk_corediv_round_rate,
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+ .set_rate = clk_corediv_set_rate,
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+ },
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+ .ratio_reload = BIT(8),
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+ .ratio_offset = 0x8,
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};
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};
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-static void __init mvebu_corediv_clk_init(struct device_node *node)
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+static void __init
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+mvebu_corediv_clk_init(struct device_node *node,
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+ const struct clk_corediv_soc_desc *soc_desc)
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{
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{
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struct clk_init_data init;
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struct clk_init_data init;
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struct clk_corediv *corediv;
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struct clk_corediv *corediv;
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@@ -178,7 +234,7 @@ static void __init mvebu_corediv_clk_init(struct device_node *node)
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parent_name = of_clk_get_parent_name(node, 0);
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parent_name = of_clk_get_parent_name(node, 0);
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- clk_data.clk_num = ARRAY_SIZE(mvebu_corediv_desc);
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+ clk_data.clk_num = soc_desc->ndescs;
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/* clks holds the clock array */
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/* clks holds the clock array */
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clks = kcalloc(clk_data.clk_num, sizeof(struct clk *),
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clks = kcalloc(clk_data.clk_num, sizeof(struct clk *),
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@@ -199,10 +255,11 @@ static void __init mvebu_corediv_clk_init(struct device_node *node)
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init.num_parents = 1;
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init.num_parents = 1;
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init.parent_names = &parent_name;
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init.parent_names = &parent_name;
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init.name = clk_name;
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init.name = clk_name;
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- init.ops = &corediv_ops;
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+ init.ops = &soc_desc->ops;
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init.flags = 0;
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init.flags = 0;
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- corediv[i].desc = mvebu_corediv_desc[i];
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+ corediv[i].soc_desc = soc_desc;
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+ corediv[i].desc = soc_desc->descs + i;
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corediv[i].reg = base;
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corediv[i].reg = base;
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corediv[i].hw.init = &init;
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corediv[i].hw.init = &init;
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@@ -219,5 +276,17 @@ err_free_clks:
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err_unmap:
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err_unmap:
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iounmap(base);
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iounmap(base);
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}
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}
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-CLK_OF_DECLARE(mvebu_corediv_clk, "marvell,armada-370-corediv-clock",
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- mvebu_corediv_clk_init);
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+
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+static void __init armada370_corediv_clk_init(struct device_node *node)
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+{
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+ return mvebu_corediv_clk_init(node, &armada370_corediv_soc);
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+}
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+CLK_OF_DECLARE(armada370_corediv_clk, "marvell,armada-370-corediv-clock",
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+ armada370_corediv_clk_init);
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+
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+static void __init armada375_corediv_clk_init(struct device_node *node)
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+{
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+ return mvebu_corediv_clk_init(node, &armada375_corediv_soc);
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+}
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+CLK_OF_DECLARE(armada375_corediv_clk, "marvell,armada-375-corediv-clock",
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+ armada375_corediv_clk_init);
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