summaryrefslogtreecommitdiff
path: root/arch/arm/mach-tcc8k
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-17 19:08:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-17 19:08:06 -0700
commit411f5c7a502769ccc0377c5ba36cb0b283847ba8 (patch)
tree2c3a29671e3f923de48c55f94194849264a7bf53 /arch/arm/mach-tcc8k
parent6d7ed21d17e640b120b902a314143e5ef4917a70 (diff)
parent9ced9f03d12d7539e86b0bff5bc750153c976c34 (diff)
Merge branch 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-arm: (289 commits) davinci: DM644x EVM: register MUSB device earlier davinci: add spi devices on tnetv107x evm davinci: add ssp config for tnetv107x evm board davinci: add tnetv107x ssp platform device spi: add ti-ssp spi master driver mfd: add driver for sequencer serial port ARM: EXYNOS4: Implement Clock gating for System MMU ARM: EXYNOS4: Enhancement of System MMU driver ARM: EXYNOS4: Add support for gpio interrupts ARM: S5P: Add function to register gpio interrupt bank data ARM: S5P: Cleanup S5P gpio interrupt code ARM: EXYNOS4: Add missing GPYx banks ARM: S3C64XX: Fix section mismatch from cpufreq init ARM: EXYNOS4: Add keypad device to the SMDKV310 ARM: EXYNOS4: Update clocks for keypad ARM: EXYNOS4: Update keypad base address ARM: EXYNOS4: Add keypad device helpers ARM: EXYNOS4: Add support for SATA on ARMLEX4210 plat-nomadik: make GPIO interrupts work with cpuidle ApSleep mach-u300: define a dummy filter function for coh901318 ... Fix up various conflicts in - arch/arm/mach-exynos4/cpufreq.c - arch/arm/mach-mxs/gpio.c - drivers/net/Kconfig - drivers/tty/serial/Kconfig - drivers/tty/serial/Makefile - drivers/usb/gadget/fsl_mxc_udc.c - drivers/video/Kconfig
Diffstat (limited to 'arch/arm/mach-tcc8k')
-rw-r--r--arch/arm/mach-tcc8k/board-tcc8000-sdk.c19
-rw-r--r--arch/arm/mach-tcc8k/clock.c38
2 files changed, 45 insertions, 12 deletions
diff --git a/arch/arm/mach-tcc8k/board-tcc8000-sdk.c b/arch/arm/mach-tcc8k/board-tcc8000-sdk.c
index fb6426ddeb77..4cb3c2dd905c 100644
--- a/arch/arm/mach-tcc8k/board-tcc8000-sdk.c
+++ b/arch/arm/mach-tcc8k/board-tcc8000-sdk.c
@@ -6,6 +6,7 @@
* published by the Free Software Foundation.
*/
+#include <linux/delay.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
@@ -17,6 +18,8 @@
#include <asm/mach/time.h>
#include <mach/clock.h>
+#include <mach/tcc-nand.h>
+#include <mach/tcc8k-regs.h>
#include "common.h"
@@ -51,6 +54,22 @@ static struct sys_timer tcc8k_timer = {
static void __init tcc8k_map_io(void)
{
tcc8k_map_common_io();
+
+ /* set PLL0 clock to 96MHz, adapt UART0 divisor */
+ __raw_writel(0x00026003, CKC_BASE + PLL0CFG_OFFS);
+ __raw_writel(0x10000001, CKC_BASE + ACLKUART0_OFFS);
+
+ /* set PLL1 clock to 192MHz */
+ __raw_writel(0x00016003, CKC_BASE + PLL1CFG_OFFS);
+
+ /* set PLL2 clock to 48MHz */
+ __raw_writel(0x00036003, CKC_BASE + PLL2CFG_OFFS);
+
+ /* with CPU freq higher than 150 MHz, need extra DTCM wait */
+ __raw_writel(0x00000001, SCFG_BASE + DTCMWAIT_OFFS);
+
+ /* PLL locking time as specified */
+ udelay(300);
}
MACHINE_START(TCC8000_SDK, "Telechips TCC8000-SDK Demo Board")
diff --git a/arch/arm/mach-tcc8k/clock.c b/arch/arm/mach-tcc8k/clock.c
index 3970a9cdce26..e7cdae5c77a4 100644
--- a/arch/arm/mach-tcc8k/clock.c
+++ b/arch/arm/mach-tcc8k/clock.c
@@ -45,11 +45,12 @@
#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)
+#define ACLK_MAX_DIV (0xfff + 1)
+
/* Crystal frequencies */
static unsigned long xi_rate, xti_rate;
@@ -106,9 +107,9 @@ static int root_clk_enable(enum root_clks src)
return 0;
}
-static int root_clk_disable(enum root_clks root_src)
+static int root_clk_disable(enum root_clks src)
{
- switch (root_src) {
+ switch (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);
@@ -197,7 +198,7 @@ static unsigned long get_rate_pll_div(int pll)
addr = CKC_BASE + CLKDIVC1_OFFS;
reg = __raw_readl(addr);
if (reg & CLKDIVC1_P2E)
- div = __raw_readl(addr) & 0x3f;
+ div = reg & 0x3f;
break;
}
return get_rate_pll(pll) / (div + 1);
@@ -258,14 +259,19 @@ static unsigned long aclk_best_div(struct clk *clk, unsigned long rate)
{
unsigned long div, src, freq, r1, r2;
+ if (!rate)
+ return ACLK_MAX_DIV;
+
src = __raw_readl(clk->aclkreg) >> ACLK_SEL_SHIFT;
src &= CLK_SRC_MASK;
freq = root_clk_get_rate(src);
- div = freq / rate + 1;
+ div = freq / rate;
+ if (!div)
+ return 1;
+ if (div >= ACLK_MAX_DIV)
+ return ACLK_MAX_DIV;
r1 = freq / div;
r2 = freq / (div + 1);
- if (r2 >= rate)
- return div + 1;
if ((rate - r2) < (r1 - rate))
return div + 1;
@@ -287,7 +293,8 @@ 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);
+ reg |= aclk_best_div(clk, rate) - 1;
+ __raw_writel(reg, clk->aclkreg);
return 0;
}
@@ -296,15 +303,22 @@ 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);
+ return root_clk_get_rate(src);
}
static unsigned long get_rate_bus(struct clk *clk)
{
- unsigned int div;
+ unsigned int reg, sdiv, bdiv, rate;
- div = (__raw_readl(CKC_BASE + CLKCTRL_OFFS) >> 4) & 0xff;
- return get_rate_sys(clk) / (div + 1);
+ reg = __raw_readl(CKC_BASE + CLKCTRL_OFFS);
+ rate = get_rate_sys(clk);
+ sdiv = (reg >> 20) & 3;
+ if (sdiv)
+ rate /= sdiv + 1;
+ bdiv = (reg >> 4) & 0xff;
+ if (bdiv)
+ rate /= bdiv + 1;
+ return rate;
}
static unsigned long get_rate_cpu(struct clk *clk)