--- /dev/null
+/*
+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
+ * JZ4740 SoC TCU 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
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/clk.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/err.h>
+
+#define JZ_REG_CLOCK_CTRL 0x00
+#define JZ_REG_CLOCK_PLL 0x10
+#define JZ_REG_CLOCK_GATE 0x20
+#define JZ_REG_CLOCK_I2S 0x60
+#define JZ_REG_CLOCK_LCD 0x64
+#define JZ_REG_CLOCK_MMC 0x68
+#define JZ_REG_CLOCK_UHC 0x6C
+#define JZ_REG_CLOCK_SPI 0x74
+
+#define JZ_CLOCK_CTRL_I2S_SRC_PLL BIT(31)
+#define JZ_CLOCK_CTRL_KO_ENABLE BIT(30)
+#define JZ_CLOCK_CTRL_UDC_SRC_PLL BIT(29)
+#define JZ_CLOCK_CTRL_UDIV_MASK 0x1f800000
+#define JZ_CLOCK_CTRL_CHANGE_ENABLE BIT(22)
+#define JZ_CLOCK_CTRL_PLL_HALF BIT(21)
+#define JZ_CLOCK_CTRL_LDIV_MASK 0x001f0000
+#define JZ_CLOCK_CTRL_UDIV_OFFSET 23
+#define JZ_CLOCK_CTRL_LDIV_OFFSET 16
+#define JZ_CLOCK_CTRL_MDIV_OFFSET 12
+#define JZ_CLOCK_CTRL_PDIV_OFFSET 8
+#define JZ_CLOCK_CTRL_HDIV_OFFSET 4
+#define JZ_CLOCK_CTRL_CDIV_OFFSET 0
+
+#define JZ_CLOCK_GATE_UART0 BIT(0)
+#define JZ_CLOCK_GATE_TCU BIT(1)
+#define JZ_CLOCK_GATE_RTC BIT(2)
+#define JZ_CLOCK_GATE_I2C BIT(3)
+#define JZ_CLOCK_GATE_SPI BIT(4)
+#define JZ_CLOCK_GATE_AIC_PCLK BIT(5)
+#define JZ_CLOCK_GATE_AIC BIT(6)
+#define JZ_CLOCK_GATE_MMC BIT(7)
+#define JZ_CLOCK_GATE_ADC BIT(8)
+#define JZ_CLOCK_GATE_CIM BIT(9)
+#define JZ_CLOCK_GATE_LCD BIT(10)
+#define JZ_CLOCK_GATE_UDC BIT(11)
+#define JZ_CLOCK_GATE_DMAC BIT(12)
+#define JZ_CLOCK_GATE_IPU BIT(13)
+#define JZ_CLOCK_GATE_UHC BIT(14)
+#define JZ_CLOCK_GATE_UART1 BIT(15)
+
+#define JZ_CLOCK_I2S_DIV_MASK 0x01ff
+
+#define JZ_CLOCK_LCD_DIV_MASK 0x01ff
+
+#define JZ_CLOCK_MMC_DIV_MASK 0x001f
+
+#define JZ_CLOCK_UHC_DIV_MASK 0x000f
+
+#define JZ_CLOCK_SPI_SRC_PLL BIT(31)
+#define JZ_CLOCK_SPI_DIV_MASK 0x000f
+
+#define JZ_CLOCK_PLL_M_MASK 0x01ff
+#define JZ_CLOCK_PLL_N_MASK 0x001f
+#define JZ_CLOCK_PLL_OD_MASK 0x0003
+#define JZ_CLOCK_PLL_STABLE BIT(10)
+#define JZ_CLOCK_PLL_BYPASS BIT(9)
+#define JZ_CLOCK_PLL_ENABLED BIT(8)
+#define JZ_CLOCK_PLL_STABLIZE_MASK 0x000f
+#define JZ_CLOCK_PLL_M_OFFSET 23
+#define JZ_CLOCK_PLL_N_OFFSET 18
+#define JZ_CLOCK_PLL_OD_OFFSET 16
+
+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;
+
+ 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 (*enable)(struct clk* clk);
+ int (*disable)(struct clk* clk);
+
+ int (*set_parent)(struct clk* clk, struct clk *parent);
+ struct list_head list;
+};
+
+struct main_clk {
+ struct clk clk;
+ uint32_t div_offset;
+};
+
+struct divided_clk {
+ struct clk clk;
+ uint32_t reg;
+ uint32_t mask;
+};
+
+struct static_clk {
+ struct clk clk;
+ unsigned long rate;
+};
+
+static uint32_t jz_clk_reg_read(int reg)
+{
+ return readl(jz_clock_base + reg);
+}
+
+static void jz_clk_reg_write_mask(int reg, uint32_t val, uint32_t mask)
+{
+ uint32_t val2;
+
+ spin_lock(&jz_clock_lock);
+ val2 = readl(jz_clock_base + reg);
+ val2 &= ~mask;
+ val2 |= val;
+ writel(val2, jz_clock_base + reg);
+ spin_unlock(&jz_clock_lock);
+}
+
+static void jz_clk_reg_set_bits(int reg, uint32_t mask)
+{
+ uint32_t val;
+
+ spin_lock(&jz_clock_lock);
+ val = readl(jz_clock_base + reg);
+ val |= mask;
+ writel(val, jz_clock_base + reg);
+ spin_unlock(&jz_clock_lock);
+}
+
+static void jz_clk_reg_clear_bits(int reg, uint32_t mask)
+{
+ uint32_t val;
+
+ spin_lock(&jz_clock_lock);
+ val = readl(jz_clock_base + reg);
+ val &= ~mask;
+ writel(val, jz_clock_base + reg);
+ spin_unlock(&jz_clock_lock);
+}
+
+static int jz_clk_enable_gating(struct clk *clk)
+{
+ jz_clk_reg_clear_bits(JZ_REG_CLOCK_GATE, clk->gate_bit);
+ return 0;
+}
+
+static int jz_clk_disable_gating(struct clk *clk)
+{
+ jz_clk_reg_set_bits(JZ_REG_CLOCK_GATE, clk->gate_bit);
+ return 0;
+}
+
+static unsigned long jz_clk_static_get_rate(struct clk *clk)
+{
+ return ((struct static_clk*)clk)->rate;
+}
+
+static int jz_clk_ko_enable(struct clk* clk)
+{
+ jz_clk_reg_set_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_KO_ENABLE);
+ return 0;
+}
+
+static int jz_clk_ko_disable(struct clk* clk)
+{
+ jz_clk_reg_clear_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_KO_ENABLE);
+ return 0;
+}
+
+
+static const int pllno[] = {1, 2, 2, 4};
+
+static unsigned long jz_clk_pll_get_rate(struct clk *clk)
+{
+ uint32_t val;
+ int m;
+ int n;
+ int od;
+
+ val = jz_clk_reg_read(JZ_REG_CLOCK_PLL);
+
+ if (val & JZ_CLOCK_PLL_BYPASS)
+ return clk_get_rate(clk->parent);
+
+ m = ((val >> 23) & 0x1ff) + 2;
+ n = ((val >> 18) & 0x1f) + 2;
+ od = (val >> 16) & 0x3;
+
+ return clk_get_rate(clk->parent) * (m / n) / pllno[od];
+}
+
+static unsigned long jz_clk_pll_half_get_rate(struct clk *clk)
+{
+ uint32_t reg;
+
+ reg = jz_clk_reg_read(JZ_REG_CLOCK_CTRL);
+ if (reg & JZ_CLOCK_CTRL_PLL_HALF)
+ return jz_clk_pll_get_rate(clk->parent);
+ 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)
+{
+ unsigned long parent_rate = jz_clk_pll_get_rate(clk->parent);
+ int div;
+
+ div = parent_rate / rate;
+ if (div > 32)
+ return parent_rate / 32;
+ else if (div < 1)
+ return parent_rate;
+
+ div &= (0x3 << (ffs(div) - 1));
+
+ return parent_rate / div;
+}
+
+static unsigned long jz_clk_main_get_rate(struct clk *clk) {
+ struct main_clk *mclk = (struct main_clk*)clk;
+ uint32_t div;
+
+ div = jz_clk_reg_read(JZ_REG_CLOCK_CTRL);
+
+ div >>= mclk->div_offset;
+ div &= 0xf;
+
+ if (div >= ARRAY_SIZE(jz_clk_main_divs))
+ div = ARRAY_SIZE(jz_clk_main_divs) - 1;
+
+ return jz_clk_pll_get_rate(clk->parent) / jz_clk_main_divs[div];
+}
+
+static int jz_clk_main_set_rate(struct clk *clk, unsigned long rate)
+{
+ struct main_clk *mclk = (struct main_clk*)clk;
+ int i;
+ int div;
+ unsigned long parent_rate = jz_clk_pll_get_rate(clk->parent);
+
+ rate = jz_clk_main_round_rate(clk, rate);
+
+ div = parent_rate / rate;
+
+ i = (ffs(div) - 1) << 1;
+ if (i > 0 && !(div & BIT(i-1)))
+ i -= 1;
+
+ jz_clk_reg_write_mask(JZ_REG_CLOCK_CTRL, i << mclk->div_offset,
+ 0xf << mclk->div_offset);
+
+ return 0;
+}
+
+
+static struct static_clk jz_clk_ext = {
+ .clk = {
+ .name = "ext",
+ .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,
+};
+
+static struct clk jz_clk_pll_half = {
+ .name = "pll half",
+ .parent = &jz_clk_pll,
+ .get_rate = jz_clk_pll_half_get_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,
+ },
+ .div_offset = JZ_CLOCK_CTRL_CDIV_OFFSET,
+};
+
+static struct main_clk jz_clk_memory = {
+ .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,
+ },
+ .div_offset = JZ_CLOCK_CTRL_MDIV_OFFSET,
+};
+
+static struct main_clk jz_clk_high_speed_peripheral = {
+ .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,
+ },
+ .div_offset = JZ_CLOCK_CTRL_HDIV_OFFSET,
+};
+
+
+static struct main_clk jz_clk_low_speed_peripheral = {
+ .clk = {
+ .name = "pclk",
+ .parent = &jz_clk_pll,
+ .get_rate = jz_clk_main_get_rate,
+ .set_rate = jz_clk_main_set_rate,
+ },
+ .div_offset = JZ_CLOCK_CTRL_PDIV_OFFSET,
+};
+
+static struct clk jz_clk_ko = {
+ .name = "cko",
+ .parent = &jz_clk_memory.clk,
+ .enable = jz_clk_ko_enable,
+ .disable = jz_clk_ko_disable,
+};
+
+static int jz_clk_spi_set_parent(struct clk *clk, struct clk *parent)
+{
+ if (parent == &jz_clk_pll)
+ jz_clk_reg_set_bits(JZ_CLOCK_SPI_SRC_PLL, JZ_REG_CLOCK_SPI);
+ else if(parent == &jz_clk_ext.clk)
+ jz_clk_reg_clear_bits(JZ_CLOCK_SPI_SRC_PLL, JZ_REG_CLOCK_SPI);
+ else
+ return -EINVAL;
+
+ clk->parent = parent;
+
+ return 0;
+}
+
+static int jz_clk_i2s_set_parent(struct clk *clk, struct clk *parent)
+{
+ if (parent == &jz_clk_pll_half)
+ jz_clk_reg_set_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_I2S_SRC_PLL);
+ else if(parent == &jz_clk_ext.clk)
+ jz_clk_reg_clear_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_I2S_SRC_PLL);
+ else
+ return -EINVAL;
+
+ clk->parent = parent;
+
+ return 0;
+}
+
+static int jz_clk_udc_set_parent(struct clk *clk, struct clk *parent)
+{
+ if (parent == &jz_clk_pll_half)
+ jz_clk_reg_set_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_UDC_SRC_PLL);
+ else if(parent == &jz_clk_ext.clk)
+ jz_clk_reg_clear_bits(JZ_REG_CLOCK_CTRL, JZ_CLOCK_CTRL_UDC_SRC_PLL);
+ else
+ return -EINVAL;
+
+ clk->parent = parent;
+
+ return 0;
+}
+
+static int jz_clk_udc_set_rate(struct clk *clk, unsigned long rate)
+{
+ int div;
+
+ if (clk->parent == &jz_clk_ext.clk)
+ return -EINVAL;
+
+ div = clk_get_rate(clk->parent) / rate - 1;
+
+ if (div < 0)
+ div = 0;
+ else if (div > 63)
+ div = 63;
+
+ jz_clk_reg_write_mask(JZ_REG_CLOCK_CTRL, div << JZ_CLOCK_CTRL_UDIV_OFFSET,
+ JZ_CLOCK_CTRL_UDIV_MASK);
+ return 0;
+}
+
+static unsigned long jz_clk_udc_get_rate(struct clk *clk)
+{
+ int div;
+
+ if (clk->parent == &jz_clk_ext.clk)
+ return clk_get_rate(clk->parent);
+
+ div = (jz_clk_reg_read(JZ_REG_CLOCK_CTRL) & JZ_CLOCK_CTRL_UDIV_MASK);
+ div >>= JZ_CLOCK_CTRL_UDIV_OFFSET;
+ div += 1;
+
+ return clk_get_rate(clk->parent) / div;
+}
+
+static unsigned long jz_clk_divided_get_rate(struct clk *clk)
+{
+ struct divided_clk *dclk = (struct divided_clk*)clk;
+ int div;
+
+ if (clk->parent == &jz_clk_ext.clk)
+ return clk_get_rate(clk->parent);
+
+ div = (jz_clk_reg_read(dclk->reg) & dclk->mask) + 1;
+
+ return clk_get_rate(clk->parent) / div;
+}
+
+static int jz_clk_divided_set_rate(struct clk *clk, unsigned long rate)
+{
+ struct divided_clk *dclk = (struct divided_clk*)clk;
+ int div;
+
+ if (clk->parent == &jz_clk_ext.clk)
+ return -EINVAL;
+
+ div = clk_get_rate(clk->parent) / rate - 1;
+
+ if (div < 0)
+ div = 0;
+ else if(div > dclk->mask)
+ div = dclk->mask;
+
+ jz_clk_reg_write_mask(dclk->reg, div, dclk->mask);
+
+ return 0;
+}
+
+static unsigned long jz_clk_ldclk_round_rate(struct clk *clk, unsigned long rate)
+{
+ int div;
+ unsigned long parent_rate = jz_clk_pll_half_get_rate(clk->parent);
+
+ if (rate > 150000000)
+ return 150000000;
+
+ div = parent_rate / rate;
+ if (div < 1)
+ div = 1;
+ else if(div > 32)
+ div = 32;
+
+ return parent_rate / div;
+}
+
+static int jz_clk_ldclk_set_rate(struct clk *clk, unsigned long rate)
+{
+ int div;
+
+ if (rate > 150000000)
+ return -EINVAL;
+
+ div = jz_clk_pll_half_get_rate(clk->parent) / rate - 1;
+ if (div < 0)
+ div = 0;
+ else if(div > 31)
+ div = 31;
+
+ jz_clk_reg_write_mask(JZ_REG_CLOCK_CTRL, div << JZ_CLOCK_CTRL_LDIV_OFFSET,
+ JZ_CLOCK_CTRL_LDIV_MASK);
+
+ return 0;
+}
+
+static unsigned long jz_clk_ldclk_get_rate(struct clk *clk)
+{
+ int div;
+
+ div = jz_clk_reg_read(JZ_REG_CLOCK_CTRL) & JZ_CLOCK_CTRL_LDIV_MASK;
+ div >>= JZ_CLOCK_CTRL_LDIV_OFFSET;
+
+ return jz_clk_pll_half_get_rate(clk->parent) / (div + 1);
+}
+
+static struct clk jz_clk_ld = {
+ .name = "lcd",
+ .parent = &jz_clk_pll_half,
+ .set_rate = jz_clk_ldclk_set_rate,
+ .get_rate = jz_clk_ldclk_get_rate,
+ .round_rate = jz_clk_ldclk_round_rate,
+};
+
+static struct divided_clk jz_clk_lp = {
+ .clk = {
+ .name = "lcd_pclk",
+ .parent = &jz_clk_pll_half,
+ },
+ .reg = JZ_REG_CLOCK_LCD,
+ .mask = JZ_CLOCK_LCD_DIV_MASK,
+};
+
+static struct clk jz_clk_cim_mclk = {
+ .name = "cim_mclk",
+ .parent = &jz_clk_high_speed_peripheral.clk,
+};
+
+static struct static_clk jz_clk_cim_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,
+ },
+ .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,
+ .enable = jz_clk_enable_gating,
+ .disable = jz_clk_disable_gating,
+};
+
+static struct clk jz_clk_uart1 = {
+ .name = "uart1",
+ .parent = &jz_clk_ext.clk,
+ .gate_bit = JZ_CLOCK_GATE_UART1,
+ .enable = jz_clk_enable_gating,
+ .disable = jz_clk_disable_gating,
+};
+
+static struct clk jz_clk_dma = {
+ .name = "dma",
+ .parent = &jz_clk_high_speed_peripheral.clk,
+ .gate_bit = JZ_CLOCK_GATE_UART0,
+ .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 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 struct clk jz_clk_i2c = {
+ .name = "i2c",
+ .parent = &jz_clk_ext.clk,
+ .gate_bit = JZ_CLOCK_GATE_I2C,
+ .enable = jz_clk_enable_gating,
+ .disable = jz_clk_disable_gating,
+};
+
+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,
+ },
+ .rate = 32768,
+};
+
+int clk_enable(struct clk *clk)
+{
+ if (!clk->enable)
+ return -EINVAL;
+
+ return clk->enable(clk);
+}
+EXPORT_SYMBOL_GPL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+ if (clk->disable)
+ clk->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->parent)
+ return clk_get_rate(clk->parent);
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(clk_get_rate);
+
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+ if (!clk->set_rate)
+ return -EINVAL;
+ return clk->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);
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(clk_round_rate);
+
+int clk_set_parent(struct clk *clk, struct clk *parent)
+{
+ int ret;
+
+ if (!clk->set_parent)
+ return -EINVAL;
+
+ clk->disable(clk);
+ ret = clk->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;
+
+ list_for_each_entry(clk, &jz_clocks, list) {
+ if (strcmp(clk->name, name) == 0)
+ return clk;
+ }
+ return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL_GPL(clk_get);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL_GPL(clk_put);
+
+inline static void clk_add(struct clk *clk)
+{
+ list_add_tail(&clk->list, &jz_clocks);
+}
+
+static void clk_register_clks(void)
+{
+ clk_add(&jz_clk_ext.clk);
+ clk_add(&jz_clk_pll);
+ clk_add(&jz_clk_pll_half);
+ clk_add(&jz_clk_cpu.clk);
+ clk_add(&jz_clk_high_speed_peripheral.clk);
+ clk_add(&jz_clk_low_speed_peripheral.clk);
+ clk_add(&jz_clk_ko);
+ clk_add(&jz_clk_ld);
+ 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);
+}
+
+int jz_init_clocks(unsigned long ext_rate)
+{
+ uint32_t val;
+
+ jz_clock_base = ioremap(0x10000000, 0x100);
+ if (!jz_clock_base)
+ return -EBUSY;
+
+ 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;
+
+ 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;
+
+ if (val & JZ_CLOCK_CTRL_UDC_SRC_PLL)
+ jz_clk_udc.parent = &jz_clk_pll_half;
+
+ clk_register_clks();
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(jz_init_clocks);
projects / openwrt / svn-archive / archive.git / blobdiff