/*
* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
- * JZ4740 SoC TCU support
+ * JZ4740 SoC clock support
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
#include <linux/list.h>
#include <linux/err.h>
+#include <asm/mach-jz4740/clock.h>
+
#define JZ_REG_CLOCK_CTRL 0x00
+#define JZ_REG_CLOCK_LOW_POWER 0x04
+#define JZ_REG_CLOCK_SLEEP_CTRL 0x08
#define JZ_REG_CLOCK_PLL 0x10
#define JZ_REG_CLOCK_GATE 0x20
#define JZ_REG_CLOCK_I2S 0x60
#define JZ_CLOCK_PLL_N_OFFSET 18
#define JZ_CLOCK_PLL_OD_OFFSET 16
+#define JZ_CLOCK_LOW_POWER_MODE_DOZE BIT(2)
+#define JZ_CLOCK_LOW_POWER_MODE_SLEEP BIT(0)
+
+#define JZ_CLOCK_SLEEP_CTRL_SUSPEND_UHC BIT(7)
+#define JZ_CLOCK_SLEEP_CTRL_ENABLE_UDC BIT(6)
+
static void __iomem *jz_clock_base;
static spinlock_t jz_clock_lock;
static LIST_HEAD(jz_clocks);
-struct clk {
- const char *name;
- struct clk* parent;
-
- uint32_t gate_bit;
-
+struct clk_ops {
unsigned long (*get_rate)(struct clk* clk);
unsigned long (*round_rate)(struct clk *clk, unsigned long rate);
int (*set_rate)(struct clk* clk, unsigned long rate);
int (*disable)(struct clk* clk);
int (*set_parent)(struct clk* clk, struct clk *parent);
+};
+
+struct clk {
+ const char *name;
+ struct clk* parent;
+
+ uint32_t gate_bit;
+
+ const struct clk_ops *ops;
+
struct list_head list;
};
return jz_clk_pll_get_rate(clk->parent) >> 1;
}
-
-
static const int jz_clk_main_divs[] = {1, 2, 3, 4, 6, 8, 12, 16, 24, 32};
static unsigned long jz_clk_main_round_rate(struct clk *clk, unsigned long rate)
return 0;
}
+static struct clk_ops jz_clk_static_ops = {
+ .get_rate = jz_clk_static_get_rate,
+ .enable = jz_clk_enable_gating,
+ .disable = jz_clk_disable_gating,
+};
static struct static_clk jz_clk_ext = {
.clk = {
.name = "ext",
- .get_rate = jz_clk_static_get_rate,
+ .gate_bit = (uint32_t)-1,
+ .ops = &jz_clk_static_ops,
},
};
+static struct clk_ops jz_clk_pll_ops = {
+ .get_rate = jz_clk_static_get_rate,
+};
+
static struct clk jz_clk_pll = {
.name = "pll",
.parent = &jz_clk_ext.clk,
- .get_rate = jz_clk_pll_get_rate,
+ .ops = &jz_clk_pll_ops,
+};
+
+static struct clk_ops jz_clk_pll_half_ops = {
+ .get_rate = jz_clk_pll_half_get_rate,
};
static struct clk jz_clk_pll_half = {
.name = "pll half",
.parent = &jz_clk_pll,
- .get_rate = jz_clk_pll_half_get_rate,
+ .ops = &jz_clk_pll_half_ops,
+};
+
+static const struct clk_ops jz_clk_main_ops = {
+ .get_rate = jz_clk_main_get_rate,
+ .set_rate = jz_clk_main_set_rate,
+ .round_rate = jz_clk_main_round_rate,
};
static struct main_clk jz_clk_cpu = {
.clk = {
.name = "cclk",
.parent = &jz_clk_pll,
- .get_rate = jz_clk_main_get_rate,
- .set_rate = jz_clk_main_set_rate,
- .round_rate = jz_clk_main_round_rate,
+ .ops = &jz_clk_main_ops,
},
.div_offset = JZ_CLOCK_CTRL_CDIV_OFFSET,
};
.clk = {
.name = "mclk",
.parent = &jz_clk_pll,
- .get_rate = jz_clk_main_get_rate,
- .set_rate = jz_clk_main_set_rate,
- .round_rate = jz_clk_main_round_rate,
+ .ops = &jz_clk_main_ops,
},
.div_offset = JZ_CLOCK_CTRL_MDIV_OFFSET,
};
.clk = {
.name = "hclk",
.parent = &jz_clk_pll,
- .get_rate = jz_clk_main_get_rate,
- .set_rate = jz_clk_main_set_rate,
- .round_rate = jz_clk_main_round_rate,
+ .ops = &jz_clk_main_ops,
},
.div_offset = JZ_CLOCK_CTRL_HDIV_OFFSET,
};
.clk = {
.name = "pclk",
.parent = &jz_clk_pll,
- .get_rate = jz_clk_main_get_rate,
- .set_rate = jz_clk_main_set_rate,
+ .ops = &jz_clk_main_ops,
},
.div_offset = JZ_CLOCK_CTRL_PDIV_OFFSET,
};
+static const struct clk_ops jz_clk_ko_ops = {
+ .enable = jz_clk_ko_enable,
+ .disable = jz_clk_ko_disable,
+};
+
static struct clk jz_clk_ko = {
.name = "cko",
.parent = &jz_clk_memory.clk,
- .enable = jz_clk_ko_enable,
- .disable = jz_clk_ko_disable,
+ .ops = &jz_clk_ko_ops,
};
static int jz_clk_spi_set_parent(struct clk *clk, struct clk *parent)
return 0;
}
+static int jz_clk_udc_disable(struct clk *clk)
+{
+ jz_clk_reg_clear_bits(JZ_REG_CLOCK_SLEEP_CTRL,
+ JZ_CLOCK_SLEEP_CTRL_ENABLE_UDC);
+
+ return 0;
+}
+
+static int jz_clk_udc_enable(struct clk *clk)
+{
+ jz_clk_reg_set_bits(JZ_REG_CLOCK_SLEEP_CTRL,
+ JZ_CLOCK_SLEEP_CTRL_ENABLE_UDC);
+
+ return 0;
+}
+
static int jz_clk_udc_set_parent(struct clk *clk, struct clk *parent)
{
if (parent == &jz_clk_pll_half)
return jz_clk_pll_half_get_rate(clk->parent) / (div + 1);
}
-static struct clk jz_clk_ld = {
- .name = "lcd",
- .parent = &jz_clk_pll_half,
+static const struct clk_ops jz_clk_ops_ld = {
.set_rate = jz_clk_ldclk_set_rate,
.get_rate = jz_clk_ldclk_get_rate,
.round_rate = jz_clk_ldclk_round_rate,
};
+static struct clk jz_clk_ld = {
+ .name = "lcd",
+ .parent = &jz_clk_pll_half,
+ .ops= &jz_clk_ops_ld,
+};
+
static struct divided_clk jz_clk_lp = {
.clk = {
.name = "lcd_pclk",
.clk = {
.name = "cim_pclk",
.gate_bit = JZ_CLOCK_GATE_CIM,
- .get_rate = jz_clk_static_get_rate,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
- },
-};
-
-static struct divided_clk jz_clk_i2s = {
- .clk = {
- .name = "i2s",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_AIC,
- .set_rate = jz_clk_divided_set_rate,
- .get_rate = jz_clk_divided_get_rate,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
- .set_parent = jz_clk_i2s_set_parent,
- },
- .reg = JZ_REG_CLOCK_I2S,
- .mask = JZ_CLOCK_I2S_DIV_MASK,
-};
-
-static struct divided_clk jz_clk_mmc = {
- .clk = {
- .name = "mmc",
- .parent = &jz_clk_pll_half,
- .gate_bit = JZ_CLOCK_GATE_MMC,
- .set_rate = jz_clk_divided_set_rate,
- .get_rate = jz_clk_divided_get_rate,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
+ .ops = &jz_clk_static_ops,
},
- .reg = JZ_REG_CLOCK_MMC,
- .mask = JZ_CLOCK_MMC_DIV_MASK,
};
-static struct divided_clk jz_clk_uhc = {
- .clk = {
- .name = "uhc",
- .parent = &jz_clk_pll_half,
- .gate_bit = JZ_CLOCK_GATE_UHC,
- .set_rate = jz_clk_divided_set_rate,
- .get_rate = jz_clk_divided_get_rate,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
- },
- .reg = JZ_REG_CLOCK_UHC,
- .mask = JZ_CLOCK_UHC_DIV_MASK,
-};
-
-static struct clk jz_clk_udc = {
- .name = "udc",
- .parent = &jz_clk_ext.clk,
- .set_parent = jz_clk_udc_set_parent,
- .set_rate = jz_clk_udc_set_rate,
- .get_rate = jz_clk_udc_get_rate,
-};
-
-static struct divided_clk jz_clk_spi = {
- .clk = {
- .name = "spi",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_SPI,
- .set_rate = jz_clk_divided_set_rate,
- .get_rate = jz_clk_divided_get_rate,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
- .set_parent = jz_clk_spi_set_parent,
- },
- .reg = JZ_REG_CLOCK_SPI,
- .mask = JZ_CLOCK_SPI_DIV_MASK,
-};
-
-static struct clk jz_clk_uart0 = {
- .name = "uart0",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_UART0,
+static const struct clk_ops jz_clk_i2s_ops =
+{
+ .set_rate = jz_clk_divided_set_rate,
+ .get_rate = jz_clk_divided_get_rate,
.enable = jz_clk_enable_gating,
.disable = jz_clk_disable_gating,
+ .set_parent = jz_clk_i2s_set_parent,
};
-static struct clk jz_clk_uart1 = {
- .name = "uart1",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_UART1,
+static const struct clk_ops jz_clk_spi_ops =
+{
+ .set_rate = jz_clk_divided_set_rate,
+ .get_rate = jz_clk_divided_get_rate,
.enable = jz_clk_enable_gating,
.disable = jz_clk_disable_gating,
+ .set_parent = jz_clk_spi_set_parent,
};
-static struct clk jz_clk_dma = {
- .name = "dma",
- .parent = &jz_clk_high_speed_peripheral.clk,
- .gate_bit = JZ_CLOCK_GATE_UART0,
+static const struct clk_ops jz_clk_divided_ops =
+{
+ .set_rate = jz_clk_divided_set_rate,
+ .get_rate = jz_clk_divided_get_rate,
.enable = jz_clk_enable_gating,
.disable = jz_clk_disable_gating,
};
-static struct clk jz_clk_ipu = {
- .name = "ipu",
- .parent = &jz_clk_high_speed_peripheral.clk,
- .gate_bit = JZ_CLOCK_GATE_IPU,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
+static struct divided_clk jz4740_clock_divided_clks[] = {
+ {
+ .clk = {
+ .name = "i2s",
+ .parent = &jz_clk_ext.clk,
+ .gate_bit = JZ_CLOCK_GATE_AIC,
+ .ops = &jz_clk_i2s_ops,
+ },
+ .reg = JZ_REG_CLOCK_I2S,
+ .mask = JZ_CLOCK_I2S_DIV_MASK,
+ },
+ {
+ .clk = {
+ .name = "spi",
+ .parent = &jz_clk_ext.clk,
+ .gate_bit = JZ_CLOCK_GATE_SPI,
+ .ops = &jz_clk_spi_ops,
+ },
+ .reg = JZ_REG_CLOCK_SPI,
+ .mask = JZ_CLOCK_SPI_DIV_MASK,
+ },
+ {
+ .clk = {
+ .name = "mmc",
+ .parent = &jz_clk_pll_half,
+ .gate_bit = JZ_CLOCK_GATE_MMC,
+ .ops = &jz_clk_divided_ops,
+ },
+ .reg = JZ_REG_CLOCK_MMC,
+ .mask = JZ_CLOCK_MMC_DIV_MASK,
+ },
+ {
+ .clk = {
+ .name = "uhc",
+ .parent = &jz_clk_pll_half,
+ .gate_bit = JZ_CLOCK_GATE_UHC,
+ .ops = &jz_clk_divided_ops,
+ },
+ .reg = JZ_REG_CLOCK_UHC,
+ .mask = JZ_CLOCK_UHC_DIV_MASK,
+ },
};
-static struct clk jz_clk_adc = {
- .name = "adc",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_ADC,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
+static const struct clk_ops jz_clk_udc_ops = {
+ .set_parent = jz_clk_udc_set_parent,
+ .set_rate = jz_clk_udc_set_rate,
+ .get_rate = jz_clk_udc_get_rate,
+ .enable = jz_clk_udc_enable,
+ .disable = jz_clk_udc_disable,
};
-static struct clk jz_clk_i2c = {
- .name = "i2c",
- .parent = &jz_clk_ext.clk,
- .gate_bit = JZ_CLOCK_GATE_I2C,
+static const struct clk_ops jz_clk_simple_ops = {
.enable = jz_clk_enable_gating,
.disable = jz_clk_disable_gating,
};
+static struct clk jz4740_clock_simple_clks[] = {
+ {
+ .name = "udc",
+ .parent = &jz_clk_ext.clk,
+ .ops = &jz_clk_udc_ops,
+ },
+ {
+ .name = "uart0",
+ .parent = &jz_clk_ext.clk,
+ .gate_bit = JZ_CLOCK_GATE_UART0,
+ .ops = &jz_clk_simple_ops,
+ },
+ {
+ .name = "uart1",
+ .parent = &jz_clk_ext.clk,
+ .gate_bit = JZ_CLOCK_GATE_UART1,
+ .ops = &jz_clk_simple_ops,
+ },
+ {
+ .name = "dma",
+ .parent = &jz_clk_high_speed_peripheral.clk,
+ .gate_bit = JZ_CLOCK_GATE_UART0,
+ .ops = &jz_clk_simple_ops,
+ },
+ {
+ .name = "ipu",
+ .parent = &jz_clk_high_speed_peripheral.clk,
+ .gate_bit = JZ_CLOCK_GATE_IPU,
+ .ops = &jz_clk_simple_ops,
+ },
+ {
+ .name = "adc",
+ .parent = &jz_clk_ext.clk,
+ .gate_bit = JZ_CLOCK_GATE_ADC,
+ .ops = &jz_clk_simple_ops,
+ },
+ {
+ .name = "i2c",
+ .parent = &jz_clk_ext.clk,
+ .gate_bit = JZ_CLOCK_GATE_I2C,
+ .ops = &jz_clk_simple_ops,
+ },
+};
+
static struct static_clk jz_clk_rtc = {
.clk = {
.name = "rtc",
.gate_bit = JZ_CLOCK_GATE_RTC,
- .enable = jz_clk_enable_gating,
- .disable = jz_clk_disable_gating,
+ .ops = &jz_clk_static_ops,
},
.rate = 32768,
};
int clk_enable(struct clk *clk)
{
- if (!clk->enable)
+ if (!clk->ops->enable)
return -EINVAL;
- return clk->enable(clk);
+ return clk->ops->enable(clk);
}
EXPORT_SYMBOL_GPL(clk_enable);
void clk_disable(struct clk *clk)
{
- if (clk->disable)
- clk->disable(clk);
+ if (clk->ops->disable)
+ clk->ops->disable(clk);
}
EXPORT_SYMBOL_GPL(clk_disable);
unsigned long clk_get_rate(struct clk *clk)
{
- if (clk->get_rate)
- return clk->get_rate(clk);
+ if (clk->ops->get_rate)
+ return clk->ops->get_rate(clk);
if (clk->parent)
return clk_get_rate(clk->parent);
int clk_set_rate(struct clk *clk, unsigned long rate)
{
- if (!clk->set_rate)
+ if (!clk->ops->set_rate)
return -EINVAL;
- return clk->set_rate(clk, rate);
+ return clk->ops->set_rate(clk, rate);
}
EXPORT_SYMBOL_GPL(clk_set_rate);
long clk_round_rate(struct clk *clk, unsigned long rate)
{
- if (clk->round_rate)
- return clk->round_rate(clk, rate);
+ if (clk->ops->round_rate)
+ return clk->ops->round_rate(clk, rate);
return -EINVAL;
}
{
int ret;
- if (!clk->set_parent)
+ if (!clk->ops->set_parent)
return -EINVAL;
- clk->disable(clk);
- ret = clk->set_parent(clk, parent);
- clk->enable(clk);
+ clk_disable(clk);
+ ret = clk->ops->set_parent(clk, parent);
+ clk_enable(clk);
return ret;
}
EXPORT_SYMBOL_GPL(clk_set_parent);
-
struct clk *clk_get(struct device *dev, const char *name)
{
struct clk *clk;
static void clk_register_clks(void)
{
+ size_t i;
+
clk_add(&jz_clk_ext.clk);
clk_add(&jz_clk_pll);
clk_add(&jz_clk_pll_half);
clk_add(&jz_clk_lp.clk);
clk_add(&jz_clk_cim_mclk);
clk_add(&jz_clk_cim_pclk.clk);
- clk_add(&jz_clk_i2s.clk);
- clk_add(&jz_clk_mmc.clk);
- clk_add(&jz_clk_uhc.clk);
- clk_add(&jz_clk_udc);
- clk_add(&jz_clk_uart0);
- clk_add(&jz_clk_uart1);
- clk_add(&jz_clk_dma);
- clk_add(&jz_clk_ipu);
- clk_add(&jz_clk_adc);
- clk_add(&jz_clk_i2c);
clk_add(&jz_clk_rtc.clk);
+
+ for (i = 0; i < ARRAY_SIZE(jz4740_clock_divided_clks); ++i)
+ clk_add(&jz4740_clock_divided_clks[i].clk);
+
+ for (i = 0; i < ARRAY_SIZE(jz4740_clock_simple_clks); ++i)
+ clk_add(&jz4740_clock_simple_clks[i]);
+}
+
+void jz4740_clock_set_wait_mode(enum jz4740_wait_mode mode)
+{
+ switch (mode) {
+ case JZ4740_WAIT_MODE_IDLE:
+ jz_clk_reg_clear_bits(JZ_REG_CLOCK_LOW_POWER, JZ_CLOCK_LOW_POWER_MODE_SLEEP);
+ break;
+ case JZ4740_WAIT_MODE_SLEEP:
+ jz_clk_reg_set_bits(JZ_REG_CLOCK_LOW_POWER, JZ_CLOCK_LOW_POWER_MODE_SLEEP);
+ break;
+ }
+}
+
+void jz4740_clock_udc_disable_auto_suspend(void)
+{
+ jz_clk_reg_clear_bits(JZ_REG_CLOCK_GATE, JZ_CLOCK_GATE_UDC);
}
+EXPORT_SYMBOL_GPL(jz4740_clock_udc_disable_auto_suspend);
+
+void jz4740_clock_udc_enable_auto_suspend(void)
+{
+ jz_clk_reg_set_bits(JZ_REG_CLOCK_GATE, JZ_CLOCK_GATE_UDC);
+}
+EXPORT_SYMBOL_GPL(jz4740_clock_udc_enable_auto_suspend);
int jz_init_clocks(unsigned long ext_rate)
{
uint32_t val;
- jz_clock_base = ioremap(0x10000000, 0x100);
+ jz_clock_base = ioremap(CPHYSADDR(CPM_BASE), 0x100);
if (!jz_clock_base)
return -EBUSY;
+ spin_lock_init(&jz_clock_lock);
+
jz_clk_ext.rate = ext_rate;
val = jz_clk_reg_read(JZ_REG_CLOCK_SPI);
if (val & JZ_CLOCK_SPI_SRC_PLL)
- jz_clk_spi.clk.parent = &jz_clk_pll_half;
+ jz4740_clock_divided_clks[1].clk.parent = &jz_clk_pll_half;
val = jz_clk_reg_read(JZ_REG_CLOCK_CTRL);
if (val & JZ_CLOCK_CTRL_I2S_SRC_PLL)
- jz_clk_i2s.clk.parent = &jz_clk_pll_half;
+ jz4740_clock_divided_clks[0].clk.parent = &jz_clk_pll_half;
if (val & JZ_CLOCK_CTRL_UDC_SRC_PLL)
- jz_clk_udc.parent = &jz_clk_pll_half;
+ jz4740_clock_simple_clks[0].parent = &jz_clk_pll_half;
clk_register_clks();
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