[PATCH 2/7 v6] Add the clock framework for Telechips TCC8xxx processors.
Hans J. Koch
hjk at linutronix.de
Wed Jun 16 15:05:38 EDT 2010
The previous implementation contains a rather confusing handling of
(struct clk)->root_id, adding and subtracting 1 all the time. This
is a clearer version of the patch for adding the clock framework for
Telechips TCC8xxx processors.
Signed-off-by: "Hans J. Koch" <hjk at linutronix.de>
---
arch/arm/mach-tcc8k/Makefile | 6 +
arch/arm/mach-tcc8k/clock.c | 571 +++++++++++++++++++++++++++
arch/arm/plat-tcc/Makefile | 2 +-
arch/arm/plat-tcc/clock.c | 180 +++++++++
arch/arm/plat-tcc/include/mach/clkdev.h | 7 +
arch/arm/plat-tcc/include/mach/clock.h | 48 +++
arch/arm/plat-tcc/include/mach/tcc8k-regs.h | 31 +-
7 files changed, 834 insertions(+), 11 deletions(-)
create mode 100644 arch/arm/mach-tcc8k/Makefile
create mode 100644 arch/arm/mach-tcc8k/clock.c
create mode 100644 arch/arm/plat-tcc/clock.c
create mode 100644 arch/arm/plat-tcc/include/mach/clkdev.h
create mode 100644 arch/arm/plat-tcc/include/mach/clock.h
diff --git a/arch/arm/mach-tcc8k/Makefile b/arch/arm/mach-tcc8k/Makefile
new file mode 100644
index 0000000..805d850
--- /dev/null
+++ b/arch/arm/mach-tcc8k/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for TCC8K boards and common files.
+#
+
+# Common support
+obj-y += clock.o
diff --git a/arch/arm/mach-tcc8k/clock.c b/arch/arm/mach-tcc8k/clock.c
new file mode 100644
index 0000000..9b95ee3
--- /dev/null
+++ b/arch/arm/mach-tcc8k/clock.c
@@ -0,0 +1,571 @@
+/*
+ * Lowlevel clock handling for Telechips TCC8xxx SoCs
+ *
+ * Copyright (C) 2010 by Hans J. Koch <hjk at linutronix.de>
+ *
+ * Licensed under the terms of the GPL v2
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+
+#include <asm/clkdev.h>
+
+#include <mach/clock.h>
+#include <mach/irqs.h>
+#include <mach/tcc8k-regs.h>
+
+extern int __init tcc8k_timer_init(struct clk *clock,
+ void __iomem *base, int irq);
+
+#define BCLKCTR0 (CKC_BASE + BCLKCTR0_OFFS)
+#define BCLKCTR1 (CKC_BASE + BCLKCTR1_OFFS)
+
+#define ACLKREF (CKC_BASE + ACLKREF_OFFS)
+#define ACLKUART0 (CKC_BASE + ACLKUART0_OFFS)
+#define ACLKUART1 (CKC_BASE + ACLKUART1_OFFS)
+#define ACLKUART2 (CKC_BASE + ACLKUART2_OFFS)
+#define ACLKUART3 (CKC_BASE + ACLKUART3_OFFS)
+#define ACLKUART4 (CKC_BASE + ACLKUART4_OFFS)
+#define ACLKI2C (CKC_BASE + ACLKI2C_OFFS)
+#define ACLKADC (CKC_BASE + ACLKADC_OFFS)
+#define ACLKUSBH (CKC_BASE + ACLKUSBH_OFFS)
+#define ACLKLCD (CKC_BASE + ACLKLCD_OFFS)
+#define ACLKSDH0 (CKC_BASE + ACLKSDH0_OFFS)
+#define ACLKSDH1 (CKC_BASE + ACLKSDH1_OFFS)
+#define ACLKSPI0 (CKC_BASE + ACLKSPI0_OFFS)
+#define ACLKSPI1 (CKC_BASE + ACLKSPI1_OFFS)
+#define ACLKSPDIF (CKC_BASE + ACLKSPDIF_OFFS)
+#define ACLKC3DEC (CKC_BASE + ACLKC3DEC_OFFS)
+#define ACLKCAN0 (CKC_BASE + ACLKCAN0_OFFS)
+#define ACLKCAN1 (CKC_BASE + ACLKCAN1_OFFS)
+#define ACLKGSB0 (CKC_BASE + ACLKGSB0_OFFS)
+#define ACLKGSB1 (CKC_BASE + ACLKGSB1_OFFS)
+#define ACLKGSB2 (CKC_BASE + ACLKGSB2_OFFS)
+#define ACLKGSB3 (CKC_BASE + ACLKGSB3_OFFS)
+#define ACLKUSBH (CKC_BASE + ACLKUSBH_OFFS)
+#define ACLKTCT (CKC_BASE + ACLKTCT_OFFS)
+#define ACLKTCX (CKC_BASE + ACLKTCX_OFFS)
+#define ACLKTCZ (CKC_BASE + ACLKTCZ_OFFS)
+
+/* Crystal frequencies */
+static unsigned long xi_rate, xti_rate;
+
+static int index_of_root_clk(struct clk *clock);
+
+static void __iomem *pll_cfg_addr(int pll)
+{
+ switch (pll) {
+ case 0: return (CKC_BASE + PLL0CFG_OFFS);
+ case 1: return (CKC_BASE + PLL1CFG_OFFS);
+ case 2: return (CKC_BASE + PLL2CFG_OFFS);
+ default:
+ BUG();
+ }
+}
+
+static int pll_enable(int pll, int enable)
+{
+ u32 reg;
+ void __iomem *addr = pll_cfg_addr(pll);
+
+ reg = __raw_readl(addr);
+ if (enable)
+ reg &= ~PLLxCFG_PD;
+ else
+ reg |= PLLxCFG_PD;
+
+ __raw_writel(reg, addr);
+ return 0;
+}
+
+static int xi_enable(int enable)
+{
+ u32 reg;
+
+ reg = __raw_readl(CKC_BASE + CLKCTRL_OFFS);
+ if (enable)
+ reg |= CLKCTRL_XE;
+ else
+ reg &= ~CLKCTRL_XE;
+
+ __raw_writel(reg, CKC_BASE + CLKCTRL_OFFS);
+ return 0;
+}
+
+static int root_clk_enable(enum root_clks src)
+{
+ switch (src) {
+ case CLK_SRC_PLL0: return pll_enable(0, 1);
+ case CLK_SRC_PLL1: return pll_enable(1, 1);
+ case CLK_SRC_PLL2: return pll_enable(2, 1);
+ case CLK_SRC_XI: return xi_enable(1);
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+static int root_clk_disable(enum root_clks root_src)
+{
+ switch (root_src) {
+ case CLK_SRC_PLL0: return pll_enable(0, 0);
+ case CLK_SRC_PLL1: return pll_enable(1, 0);
+ case CLK_SRC_PLL2: return pll_enable(2, 0);
+ case CLK_SRC_XI: return xi_enable(0);
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+static int enable_clk(struct clk *clk)
+{
+ u32 reg;
+
+ if (clk->root_id != CLK_SRC_NOROOT)
+ return root_clk_enable(clk->root_id);
+
+ if (clk->aclkreg) {
+ reg = __raw_readl(clk->aclkreg);
+ reg |= ACLK_EN;
+ __raw_writel(reg, clk->aclkreg);
+ }
+ if (clk->bclkctr) {
+ reg = __raw_readl(clk->bclkctr);
+ reg |= 1 << clk->bclk_shift;
+ __raw_writel(reg, clk->bclkctr);
+ }
+ return 0;
+}
+
+static void disable_clk(struct clk *clk)
+{
+ u32 reg;
+
+ if (clk->root_id != CLK_SRC_NOROOT) {
+ root_clk_disable(clk->root_id);
+ return;
+ }
+
+ if (clk->bclkctr) {
+ reg = __raw_readl(clk->bclkctr);
+ reg &= ~(1 << clk->bclk_shift);
+ __raw_writel(reg, clk->bclkctr);
+ }
+ if (clk->aclkreg) {
+ reg = __raw_readl(clk->aclkreg);
+ reg &= ~ACLK_EN;
+ __raw_writel(reg, clk->aclkreg);
+ }
+}
+
+static unsigned long get_rate_pll(int pll)
+{
+ u32 reg;
+ unsigned long s, m, p;
+ void __iomem *addr = pll_cfg_addr(pll);
+
+ reg = __raw_readl(addr);
+ s = (reg >> 16) & 0x07;
+ m = (reg >> 8) & 0xff;
+ p = reg & 0x3f;
+
+ return (m * xi_rate) / (p * (1 << s));
+}
+
+static unsigned long get_rate_pll_div(int pll)
+{
+ u32 reg;
+ unsigned long div = 0;
+ void __iomem *addr;
+
+ switch (pll) {
+ case 0:
+ addr = CKC_BASE + CLKDIVC0_OFFS;
+ reg = __raw_readl(addr);
+ if (reg & CLKDIVC0_P0E)
+ div = (reg >> 24) & 0x3f;
+ break;
+ case 1:
+ addr = CKC_BASE + CLKDIVC0_OFFS;
+ reg = __raw_readl(addr);
+ if (reg & CLKDIVC0_P1E)
+ div = (reg >> 16) & 0x3f;
+ break;
+ case 2:
+ addr = CKC_BASE + CLKDIVC1_OFFS;
+ reg = __raw_readl(addr);
+ if (reg & CLKDIVC1_P2E)
+ div = __raw_readl(addr) & 0x3f;
+ break;
+ }
+ return get_rate_pll(pll) / (div + 1);
+}
+
+static unsigned long get_rate_xi_div(void)
+{
+ unsigned long div = 0;
+ u32 reg = __raw_readl(CKC_BASE + CLKDIVC0_OFFS);
+
+ if (reg & CLKDIVC0_XE)
+ div = (reg >> 8) & 0x3f;
+
+ return xi_rate / (div + 1);
+}
+
+static unsigned long get_rate_xti_div(void)
+{
+ unsigned long div = 0;
+ u32 reg = __raw_readl(CKC_BASE + CLKDIVC0_OFFS);
+
+ if (reg & CLKDIVC0_XTE)
+ div = reg & 0x3f;
+
+ return xti_rate / (div + 1);
+}
+
+static unsigned long root_clk_get_rate(enum root_clks src)
+{
+ switch (src) {
+ case CLK_SRC_PLL0: return get_rate_pll(0);
+ case CLK_SRC_PLL1: return get_rate_pll(1);
+ case CLK_SRC_PLL2: return get_rate_pll(2);
+ case CLK_SRC_PLL0DIV: return get_rate_pll_div(0);
+ case CLK_SRC_PLL1DIV: return get_rate_pll_div(1);
+ case CLK_SRC_PLL2DIV: return get_rate_pll_div(2);
+ case CLK_SRC_XI: return xi_rate;
+ case CLK_SRC_XTI: return xti_rate;
+ case CLK_SRC_XIDIV: return get_rate_xi_div();
+ case CLK_SRC_XTIDIV: return get_rate_xti_div();
+ default: return 0;
+ }
+}
+
+static unsigned long aclk_get_rate(struct clk *clk)
+{
+ u32 reg;
+ unsigned long div;
+ unsigned int src;
+
+ reg = __raw_readl(clk->aclkreg);
+ div = reg & 0x0fff;
+ src = (reg >> ACLK_SEL_SHIFT) & CLK_SRC_MASK;
+ return root_clk_get_rate(src) / (div + 1);
+}
+
+static unsigned long aclk_best_div(struct clk *clk, unsigned long rate)
+{
+ unsigned long div, src, freq, r1, r2;
+
+ src = __raw_readl(clk->aclkreg) >> ACLK_SEL_SHIFT;
+ src &= CLK_SRC_MASK;
+ freq = root_clk_get_rate(src);
+ div = freq / rate + 1;
+ r1 = freq / div;
+ r2 = freq / (div + 1);
+ if (r2 >= rate)
+ return div + 1;
+ if ((rate - r2) < (r1 - rate))
+ return div + 1;
+
+ return div;
+}
+
+static unsigned long aclk_round_rate(struct clk *clk, unsigned long rate)
+{
+ unsigned int src;
+
+ src = __raw_readl(clk->aclkreg) >> ACLK_SEL_SHIFT;
+ src &= CLK_SRC_MASK;
+
+ return root_clk_get_rate(src) / aclk_best_div(clk, rate);
+}
+
+static int aclk_set_rate(struct clk *clk, unsigned long rate)
+{
+ u32 reg;
+
+ reg = __raw_readl(clk->aclkreg) & ~ACLK_DIV_MASK;
+ reg |= aclk_best_div(clk, rate);
+ return 0;
+}
+
+static unsigned long get_rate_sys(struct clk *clk)
+{
+ unsigned int src;
+
+ src = __raw_readl(CKC_BASE + CLKCTRL_OFFS) & CLK_SRC_MASK;
+ return root_clk_get_rate(src);
+}
+
+static unsigned long get_rate_bus(struct clk *clk)
+{
+ unsigned int div;
+
+ div = (__raw_readl(CKC_BASE + CLKCTRL_OFFS) >> 4) & 0xff;
+ return get_rate_sys(clk) / (div + 1);
+}
+
+static unsigned long get_rate_cpu(struct clk *clk)
+{
+ unsigned int reg, div, fsys, fbus;
+
+ fbus = get_rate_bus(clk);
+ reg = __raw_readl(CKC_BASE + CLKCTRL_OFFS);
+ if (reg & (1 << 29))
+ return fbus;
+ fsys = get_rate_sys(clk);
+ div = (reg >> 16) & 0x0f;
+ return fbus + ((fsys - fbus) * (div + 1)) / 16;
+}
+
+static unsigned long get_rate_root(struct clk *clk)
+{
+ return root_clk_get_rate(clk->root_id);
+}
+
+static int aclk_set_parent(struct clk *clock, struct clk *parent)
+{
+ u32 reg;
+
+ if (clock->parent == parent)
+ return 0;
+
+ clock->parent = parent;
+
+ if (!parent)
+ return 0;
+
+ if (parent->root_id == CLK_SRC_NOROOT)
+ return 0;
+ reg = __raw_readl(clock->aclkreg);
+ reg &= ~ACLK_SEL_MASK;
+ reg |= (parent->root_id << ACLK_SEL_SHIFT) & ACLK_SEL_MASK;
+ __raw_writel(reg, clock->aclkreg);
+
+ return 0;
+}
+
+#define DEFINE_ROOT_CLOCK(name, ri, p) \
+ static struct clk name = { \
+ .root_id = ri, \
+ .get_rate = get_rate_root, \
+ .enable = enable_clk, \
+ .disable = disable_clk, \
+ .parent = p, \
+ };
+
+#define DEFINE_SPECIAL_CLOCK(name, gr, p) \
+ static struct clk name = { \
+ .root_id = CLK_SRC_NOROOT, \
+ .get_rate = gr, \
+ .parent = p, \
+ };
+
+#define DEFINE_ACLOCK(name, bc, bs, ar) \
+ static struct clk name = { \
+ .root_id = CLK_SRC_NOROOT, \
+ .bclkctr = bc, \
+ .bclk_shift = bs, \
+ .aclkreg = ar, \
+ .get_rate = aclk_get_rate, \
+ .set_rate = aclk_set_rate, \
+ .round_rate = aclk_round_rate, \
+ .enable = enable_clk, \
+ .disable = disable_clk, \
+ .set_parent = aclk_set_parent, \
+ };
+
+#define DEFINE_BCLOCK(name, bc, bs, gr, p) \
+ static struct clk name = { \
+ .root_id = CLK_SRC_NOROOT, \
+ .bclkctr = bc, \
+ .bclk_shift = bs, \
+ .get_rate = gr, \
+ .enable = enable_clk, \
+ .disable = disable_clk, \
+ .parent = p, \
+ };
+
+DEFINE_ROOT_CLOCK(xi, CLK_SRC_XI, NULL)
+DEFINE_ROOT_CLOCK(xti, CLK_SRC_XTI, NULL)
+DEFINE_ROOT_CLOCK(xidiv, CLK_SRC_XIDIV, &xi)
+DEFINE_ROOT_CLOCK(xtidiv, CLK_SRC_XTIDIV, &xti)
+DEFINE_ROOT_CLOCK(pll0, CLK_SRC_PLL0, &xi)
+DEFINE_ROOT_CLOCK(pll1, CLK_SRC_PLL1, &xi)
+DEFINE_ROOT_CLOCK(pll2, CLK_SRC_PLL2, &xi)
+DEFINE_ROOT_CLOCK(pll0div, CLK_SRC_PLL0DIV, &pll0)
+DEFINE_ROOT_CLOCK(pll1div, CLK_SRC_PLL1DIV, &pll1)
+DEFINE_ROOT_CLOCK(pll2div, CLK_SRC_PLL2DIV, &pll2)
+
+/* The following 3 clocks are special and are initialized explicitly later */
+DEFINE_SPECIAL_CLOCK(sys, get_rate_sys, NULL)
+DEFINE_SPECIAL_CLOCK(bus, get_rate_bus, &sys)
+DEFINE_SPECIAL_CLOCK(cpu, get_rate_cpu, &sys)
+
+DEFINE_ACLOCK(tct, NULL, 0, ACLKTCT)
+DEFINE_ACLOCK(tcx, NULL, 0, ACLKTCX)
+DEFINE_ACLOCK(tcz, NULL, 0, ACLKTCZ)
+DEFINE_ACLOCK(ref, NULL, 0, ACLKREF)
+DEFINE_ACLOCK(uart0, BCLKCTR0, 5, ACLKUART0)
+DEFINE_ACLOCK(uart1, BCLKCTR0, 23, ACLKUART1)
+DEFINE_ACLOCK(uart2, BCLKCTR0, 6, ACLKUART2)
+DEFINE_ACLOCK(uart3, BCLKCTR0, 8, ACLKUART3)
+DEFINE_ACLOCK(uart4, BCLKCTR1, 6, ACLKUART4)
+DEFINE_ACLOCK(i2c, BCLKCTR0, 7, ACLKI2C)
+DEFINE_ACLOCK(adc, BCLKCTR0, 10, ACLKADC)
+DEFINE_ACLOCK(usbh0, BCLKCTR0, 11, ACLKUSBH)
+DEFINE_ACLOCK(lcd, BCLKCTR0, 13, ACLKLCD)
+DEFINE_ACLOCK(sd0, BCLKCTR0, 17, ACLKSDH0)
+DEFINE_ACLOCK(sd1, BCLKCTR1, 5, ACLKSDH1)
+DEFINE_ACLOCK(spi0, BCLKCTR0, 24, ACLKSPI0)
+DEFINE_ACLOCK(spi1, BCLKCTR0, 30, ACLKSPI1)
+DEFINE_ACLOCK(spdif, BCLKCTR1, 2, ACLKSPDIF)
+DEFINE_ACLOCK(c3dec, BCLKCTR1, 9, ACLKC3DEC)
+DEFINE_ACLOCK(can0, BCLKCTR1, 10, ACLKCAN0)
+DEFINE_ACLOCK(can1, BCLKCTR1, 11, ACLKCAN1)
+DEFINE_ACLOCK(gsb0, BCLKCTR1, 13, ACLKGSB0)
+DEFINE_ACLOCK(gsb1, BCLKCTR1, 14, ACLKGSB1)
+DEFINE_ACLOCK(gsb2, BCLKCTR1, 15, ACLKGSB2)
+DEFINE_ACLOCK(gsb3, BCLKCTR1, 16, ACLKGSB3)
+DEFINE_ACLOCK(usbh1, BCLKCTR1, 20, ACLKUSBH)
+
+DEFINE_BCLOCK(dai0, BCLKCTR0, 0, NULL, NULL)
+DEFINE_BCLOCK(pic, BCLKCTR0, 1, NULL, NULL)
+DEFINE_BCLOCK(tc, BCLKCTR0, 2, NULL, NULL)
+DEFINE_BCLOCK(gpio, BCLKCTR0, 3, NULL, NULL)
+DEFINE_BCLOCK(usbd, BCLKCTR0, 4, NULL, NULL)
+DEFINE_BCLOCK(ecc, BCLKCTR0, 9, NULL, NULL)
+DEFINE_BCLOCK(gdma0, BCLKCTR0, 12, NULL, NULL)
+DEFINE_BCLOCK(rtc, BCLKCTR0, 15, NULL, NULL)
+DEFINE_BCLOCK(nfc, BCLKCTR0, 16, NULL, NULL)
+DEFINE_BCLOCK(g2d, BCLKCTR0, 18, NULL, NULL)
+DEFINE_BCLOCK(gdma1, BCLKCTR0, 22, NULL, NULL)
+DEFINE_BCLOCK(mscl, BCLKCTR0, 25, NULL, NULL)
+DEFINE_BCLOCK(bdma, BCLKCTR1, 0, NULL, NULL)
+DEFINE_BCLOCK(adma0, BCLKCTR1, 1, NULL, NULL)
+DEFINE_BCLOCK(scfg, BCLKCTR1, 3, NULL, NULL)
+DEFINE_BCLOCK(cid, BCLKCTR1, 4, NULL, NULL)
+DEFINE_BCLOCK(dai1, BCLKCTR1, 7, NULL, NULL)
+DEFINE_BCLOCK(adma1, BCLKCTR1, 8, NULL, NULL)
+DEFINE_BCLOCK(gps, BCLKCTR1, 12, NULL, NULL)
+DEFINE_BCLOCK(gdma2, BCLKCTR1, 17, NULL, NULL)
+DEFINE_BCLOCK(gdma3, BCLKCTR1, 18, NULL, NULL)
+DEFINE_BCLOCK(ddrc, BCLKCTR1, 19, NULL, NULL)
+
+#define _REGISTER_CLOCK(d, n, c) \
+ { \
+ .dev_id = d, \
+ .con_id = n, \
+ .clk = &c, \
+ },
+
+static struct clk_lookup lookups[] = {
+ _REGISTER_CLOCK(NULL, "bus", bus)
+ _REGISTER_CLOCK(NULL, "cpu", cpu)
+ _REGISTER_CLOCK(NULL, "tct", tct)
+ _REGISTER_CLOCK(NULL, "tcx", tcx)
+ _REGISTER_CLOCK(NULL, "tcz", tcz)
+ _REGISTER_CLOCK(NULL, "ref", ref)
+ _REGISTER_CLOCK(NULL, "dai0", dai0)
+ _REGISTER_CLOCK(NULL, "pic", pic)
+ _REGISTER_CLOCK(NULL, "tc", tc)
+ _REGISTER_CLOCK(NULL, "gpio", gpio)
+ _REGISTER_CLOCK(NULL, "usbd", usbd)
+ _REGISTER_CLOCK("tcc-uart.0", NULL, uart0)
+ _REGISTER_CLOCK("tcc-uart.2", NULL, uart2)
+ _REGISTER_CLOCK("tcc-i2c", NULL, i2c)
+ _REGISTER_CLOCK("tcc-uart.3", NULL, uart3)
+ _REGISTER_CLOCK(NULL, "ecc", ecc)
+ _REGISTER_CLOCK(NULL, "adc", adc)
+ _REGISTER_CLOCK("tcc-usbh.0", "usb", usbh0)
+ _REGISTER_CLOCK(NULL, "gdma0", gdma0)
+ _REGISTER_CLOCK(NULL, "lcd", lcd)
+ _REGISTER_CLOCK(NULL, "rtc", rtc)
+ _REGISTER_CLOCK(NULL, "nfc", nfc)
+ _REGISTER_CLOCK("tcc-mmc.0", NULL, sd0)
+ _REGISTER_CLOCK(NULL, "g2d", g2d)
+ _REGISTER_CLOCK(NULL, "gdma1", gdma1)
+ _REGISTER_CLOCK("tcc-uart.1", NULL, uart1)
+ _REGISTER_CLOCK("tcc-spi.0", NULL, spi0)
+ _REGISTER_CLOCK(NULL, "mscl", mscl)
+ _REGISTER_CLOCK("tcc-spi.1", NULL, spi1)
+ _REGISTER_CLOCK(NULL, "bdma", bdma)
+ _REGISTER_CLOCK(NULL, "adma0", adma0)
+ _REGISTER_CLOCK(NULL, "spdif", spdif)
+ _REGISTER_CLOCK(NULL, "scfg", scfg)
+ _REGISTER_CLOCK(NULL, "cid", cid)
+ _REGISTER_CLOCK("tcc-mmc.1", NULL, sd1)
+ _REGISTER_CLOCK("tcc-uart.4", NULL, uart4)
+ _REGISTER_CLOCK(NULL, "dai1", dai1)
+ _REGISTER_CLOCK(NULL, "adma1", adma1)
+ _REGISTER_CLOCK(NULL, "c3dec", c3dec)
+ _REGISTER_CLOCK("tcc-can.0", NULL, can0)
+ _REGISTER_CLOCK("tcc-can.1", NULL, can1)
+ _REGISTER_CLOCK(NULL, "gps", gps)
+ _REGISTER_CLOCK("tcc-gsb.0", NULL, gsb0)
+ _REGISTER_CLOCK("tcc-gsb.1", NULL, gsb1)
+ _REGISTER_CLOCK("tcc-gsb.2", NULL, gsb2)
+ _REGISTER_CLOCK("tcc-gsb.3", NULL, gsb3)
+ _REGISTER_CLOCK(NULL, "gdma2", gdma2)
+ _REGISTER_CLOCK(NULL, "gdma3", gdma3)
+ _REGISTER_CLOCK(NULL, "ddrc", ddrc)
+ _REGISTER_CLOCK("tcc-usbh.1", "usb", usbh1)
+};
+
+static struct clk *root_clk_by_index(enum root_clks src)
+{
+ switch (src) {
+ case CLK_SRC_PLL0: return &pll0;
+ case CLK_SRC_PLL1: return &pll1;
+ case CLK_SRC_PLL2: return &pll2;
+ case CLK_SRC_PLL0DIV: return &pll0div;
+ case CLK_SRC_PLL1DIV: return &pll1div;
+ case CLK_SRC_PLL2DIV: return &pll2div;
+ case CLK_SRC_XI: return ξ
+ case CLK_SRC_XTI: return &xti;
+ case CLK_SRC_XIDIV: return &xidiv;
+ case CLK_SRC_XTIDIV: return &xtidiv;
+ default: return NULL;
+ }
+}
+
+static void find_aclk_parent(struct clk *clk)
+{
+ unsigned int src;
+ struct clk *clock;
+
+ if (!clk->aclkreg)
+ return;
+
+ src = __raw_readl(clk->aclkreg) >> ACLK_SEL_SHIFT;
+ src &= CLK_SRC_MASK;
+
+ clock = root_clk_by_index(src);
+ if (!clock)
+ return;
+
+ clk->parent = clock;
+ clk->set_parent = aclk_set_parent;
+}
+
+int __init tcc_clocks_init(unsigned long xi_freq, unsigned long xti_freq)
+{
+ int i;
+
+ xi_rate = xi_freq;
+ xti_rate = xti_freq;
+
+ /* fixup parents and add the clock */
+ for (i = 0; i < ARRAY_SIZE(lookups); i++) {
+ find_aclk_parent(lookups[i].clk);
+ clkdev_add(&lookups[i]);
+ }
+
+ return tcc8k_timer_init(&tcz, (void __iomem *)TIMER_BASE, INT_TC32);
+}
diff --git a/arch/arm/plat-tcc/Makefile b/arch/arm/plat-tcc/Makefile
index 3f2e4fe..eceabc8 100644
--- a/arch/arm/plat-tcc/Makefile
+++ b/arch/arm/plat-tcc/Makefile
@@ -1,3 +1,3 @@
# "Telechips Platform Common Modules"
-obj-y := system.o
+obj-y := clock.o system.o
diff --git a/arch/arm/plat-tcc/clock.c b/arch/arm/plat-tcc/clock.c
new file mode 100644
index 0000000..31b3ee8
--- /dev/null
+++ b/arch/arm/plat-tcc/clock.c
@@ -0,0 +1,180 @@
+/*
+ * Clock framework for Telechips SoCs
+ * Based on arch/arm/plat-mxc/clock.c
+ *
+ * Copyright (C) 2004 - 2005 Nokia corporation
+ * Written by Tuukka Tikkanen <tuukka.tikkanen at elektrobit.com>
+ * Modified for omap shared clock framework by Tony Lindgren <tony at atomide.com>
+ * Copyright 2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Juergen Beisert, kernel at pengutronix.de
+ * Copyright 2010 Hans J. Koch, hjk at linutronix.de
+ *
+ * Licensed under the terms of the GPL v2.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/string.h>
+
+#include <mach/clock.h>
+#include <mach/hardware.h>
+
+static DEFINE_MUTEX(clocks_mutex);
+
+/*-------------------------------------------------------------------------
+ * Standard clock functions defined in include/linux/clk.h
+ *-------------------------------------------------------------------------*/
+
+static void __clk_disable(struct clk *clk)
+{
+ BUG_ON(clk->refcount == 0);
+
+ if (!(--clk->refcount) && clk->disable) {
+ /* Unconditionally disable the clock in hardware */
+ clk->disable(clk);
+ /* recursively disable parents */
+ if (clk->parent)
+ __clk_disable(clk->parent);
+ }
+}
+
+static int __clk_enable(struct clk *clk)
+{
+ int ret = 0;
+
+ if (clk->refcount++ == 0 && clk->enable) {
+ if (clk->parent)
+ ret = __clk_enable(clk->parent);
+ if (ret)
+ return ret;
+ else
+ return clk->enable(clk);
+ }
+
+ return 0;
+}
+
+/* This function increments the reference count on the clock and enables the
+ * clock if not already enabled. The parent clock tree is recursively enabled
+ */
+int clk_enable(struct clk *clk)
+{
+ int ret = 0;
+
+ if (!clk)
+ return -EINVAL;
+
+ mutex_lock(&clocks_mutex);
+ ret = __clk_enable(clk);
+ mutex_unlock(&clocks_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(clk_enable);
+
+/* This function decrements the reference count on the clock and disables
+ * the clock when reference count is 0. The parent clock tree is
+ * recursively disabled
+ */
+void clk_disable(struct clk *clk)
+{
+ if (!clk)
+ return;
+
+ mutex_lock(&clocks_mutex);
+ __clk_disable(clk);
+ mutex_unlock(&clocks_mutex);
+}
+EXPORT_SYMBOL_GPL(clk_disable);
+
+/* Retrieve the *current* clock rate. If the clock itself
+ * does not provide a special calculation routine, ask
+ * its parent and so on, until one is able to return
+ * a valid clock rate
+ */
+unsigned long clk_get_rate(struct clk *clk)
+{
+ if (!clk)
+ return 0UL;
+
+ if (clk->get_rate)
+ return clk->get_rate(clk);
+
+ return clk_get_rate(clk->parent);
+}
+EXPORT_SYMBOL_GPL(clk_get_rate);
+
+/* Round the requested clock rate to the nearest supported
+ * rate that is less than or equal to the requested rate.
+ * This is dependent on the clock's current parent.
+ */
+long clk_round_rate(struct clk *clk, unsigned long rate)
+{
+ if (!clk)
+ return 0;
+ if (!clk->round_rate)
+ return 0;
+
+ return clk->round_rate(clk, rate);
+}
+EXPORT_SYMBOL_GPL(clk_round_rate);
+
+/* Set the clock to the requested clock rate. The rate must
+ * match a supported rate exactly based on what clk_round_rate returns
+ */
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+ int ret = -EINVAL;
+
+ if (!clk)
+ return ret;
+ if (!clk->set_rate || !rate)
+ return ret;
+
+ mutex_lock(&clocks_mutex);
+ ret = clk->set_rate(clk, rate);
+ mutex_unlock(&clocks_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(clk_set_rate);
+
+/* Set the clock's parent to another clock source */
+int clk_set_parent(struct clk *clk, struct clk *parent)
+{
+ struct clk *old;
+ int ret = -EINVAL;
+
+ if (!clk)
+ return ret;
+ if (!clk->set_parent || !parent)
+ return ret;
+
+ mutex_lock(&clocks_mutex);
+ old = clk->parent;
+ if (clk->refcount)
+ __clk_enable(parent);
+ ret = clk->set_parent(clk, parent);
+ if (ret)
+ old = parent;
+ if (clk->refcount)
+ __clk_disable(old);
+ mutex_unlock(&clocks_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(clk_set_parent);
+
+/* Retrieve the clock's parent clock source */
+struct clk *clk_get_parent(struct clk *clk)
+{
+ if (!clk)
+ return NULL;
+
+ return clk->parent;
+}
+EXPORT_SYMBOL_GPL(clk_get_parent);
+
diff --git a/arch/arm/plat-tcc/include/mach/clkdev.h b/arch/arm/plat-tcc/include/mach/clkdev.h
new file mode 100644
index 0000000..04b37a8
--- /dev/null
+++ b/arch/arm/plat-tcc/include/mach/clkdev.h
@@ -0,0 +1,7 @@
+#ifndef __ASM_MACH_CLKDEV_H
+#define __ASM_MACH_CLKDEV_H
+
+#define __clk_get(clk) ({ 1; })
+#define __clk_put(clk) do { } while (0)
+
+#endif
diff --git a/arch/arm/plat-tcc/include/mach/clock.h b/arch/arm/plat-tcc/include/mach/clock.h
new file mode 100644
index 0000000..a12f58a
--- /dev/null
+++ b/arch/arm/plat-tcc/include/mach/clock.h
@@ -0,0 +1,48 @@
+/*
+ * Low level clock header file for Telechips TCC architecture
+ * (C) 2010 Hans J. Koch <hjk at linutronix.de>
+ *
+ * Licensed under the GPL v2.
+ */
+
+#ifndef __ASM_ARCH_TCC_CLOCK_H__
+#define __ASM_ARCH_TCC_CLOCK_H__
+
+#ifndef __ASSEMBLY__
+
+struct clk {
+ struct clk *parent;
+ /* id number of a root clock, 0 for normal clocks */
+ int root_id;
+ /* Reference count of clock enable/disable */
+ int refcount;
+ /* Address of associated BCLKCTRx register. Must be set. */
+ void __iomem *bclkctr;
+ /* Bit position for BCLKCTRx. Must be set. */
+ int bclk_shift;
+ /* Address of ACLKxxx register, if any. */
+ void __iomem *aclkreg;
+ /* get the current clock rate (always a fresh value) */
+ unsigned long (*get_rate) (struct clk *);
+ /* Function ptr to set the clock to a new rate. The rate must match a
+ supported rate returned from round_rate. Leave blank if clock is not
+ programmable */
+ int (*set_rate) (struct clk *, unsigned long);
+ /* Function ptr to round the requested clock rate to the nearest
+ supported rate that is less than or equal to the requested rate. */
+ unsigned long (*round_rate) (struct clk *, unsigned long);
+ /* Function ptr to enable the clock. Leave blank if clock can not
+ be gated. */
+ int (*enable) (struct clk *);
+ /* Function ptr to disable the clock. Leave blank if clock can not
+ be gated. */
+ void (*disable) (struct clk *);
+ /* Function ptr to set the parent clock of the clock. */
+ int (*set_parent) (struct clk *, struct clk *);
+};
+
+int clk_register(struct clk *clk);
+void clk_unregister(struct clk *clk);
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ASM_ARCH_MXC_CLOCK_H__ */
diff --git a/arch/arm/plat-tcc/include/mach/tcc8k-regs.h b/arch/arm/plat-tcc/include/mach/tcc8k-regs.h
index f3243eb..1786867 100644
--- a/arch/arm/plat-tcc/include/mach/tcc8k-regs.h
+++ b/arch/arm/plat-tcc/include/mach/tcc8k-regs.h
@@ -30,13 +30,13 @@
#define EXT_MEM_CTRL_BASE 0xf0000000
#define EXT_MEM_CTRL_SIZE SZ_4K
-#define CS1_BASE_VIRT 0xf7000000
-#define AHB_PERI_BASE_VIRT 0xf4000000
-#define APB0_PERI_BASE_VIRT 0xf1000000
-#define APB1_PERI_BASE_VIRT 0xf2000000
-#define EXT_MEM_CTRL_BASE_VIRT 0xf3000000
-#define INT_SRAM_BASE_VIRT 0xf5000000
-#define DATA_TCM_BASE_VIRT 0xf6000000
+#define CS1_BASE_VIRT (void __iomem *)0xf7000000
+#define AHB_PERI_BASE_VIRT (void __iomem *)0xf4000000
+#define APB0_PERI_BASE_VIRT (void __iomem *)0xf1000000
+#define APB1_PERI_BASE_VIRT (void __iomem *)0xf2000000
+#define EXT_MEM_CTRL_BASE_VIRT (void __iomem *)0xf3000000
+#define INT_SRAM_BASE_VIRT (void __iomem *)0xf5000000
+#define DATA_TCM_BASE_VIRT (void __iomem *)0xf6000000
#define __REG(x) (*((volatile u32 *)(x)))
@@ -649,8 +649,7 @@
#define PMGPIO_APB_OFFS 0x800
/* Clock controller registers */
-#define CKC_BASE (APB1_PERI_BASE_VIRT + 0x6000)
-#define CKC_BASE_PHYS (APB1_PERI_BASE + 0x6000)
+#define CKC_BASE ((void __iomem *)(APB1_PERI_BASE_VIRT + 0x6000))
#define CLKCTRL_OFFS 0x00
#define PLL0CFG_OFFS 0x04
@@ -724,8 +723,20 @@
/* SWRESET1 bits */
#define SWRESET1_USBH1 (1 << 20)
-/* System clock sources */
+/* System clock sources.
+ * Note: These are the clock sources that serve as parents for
+ * all other clocks. They have no parents themselves.
+ *
+ * These values are used for struct clk->root_id. All clocks
+ * that are not system clock sources have this value set to
+ * CLK_SRC_NOROOT.
+ * The values for system clocks start with CLK_SRC_PLL0 == 0
+ * because this gives us exactly the values needed for the lower
+ * 4 bits of ACLK_* registers. Therefore, CLK_SRC_NOROOT is
+ * defined as -1 to not disturb the order.
+ */
enum root_clks {
+ CLK_SRC_NOROOT = -1,
CLK_SRC_PLL0 = 0,
CLK_SRC_PLL1,
CLK_SRC_PLL0DIV,
--
1.6.3.3
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