summaryrefslogtreecommitdiff
path: root/arch/arm/mach-mxs/clock-mx28.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-mxs/clock-mx28.c')
-rw-r--r--arch/arm/mach-mxs/clock-mx28.c803
1 files changed, 0 insertions, 803 deletions
diff --git a/arch/arm/mach-mxs/clock-mx28.c b/arch/arm/mach-mxs/clock-mx28.c
deleted file mode 100644
index cea29c99e21..00000000000
--- a/arch/arm/mach-mxs/clock-mx28.c
+++ /dev/null
@@ -1,803 +0,0 @@
-/*
- * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * 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.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <linux/mm.h>
-#include <linux/delay.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/jiffies.h>
-#include <linux/clkdev.h>
-#include <linux/spinlock.h>
-
-#include <asm/clkdev.h>
-#include <asm/div64.h>
-
-#include <mach/mx28.h>
-#include <mach/common.h>
-#include <mach/clock.h>
-#include <mach/digctl.h>
-
-#include "regs-clkctrl-mx28.h"
-
-#define CLKCTRL_BASE_ADDR MX28_IO_ADDRESS(MX28_CLKCTRL_BASE_ADDR)
-#define DIGCTRL_BASE_ADDR MX28_IO_ADDRESS(MX28_DIGCTL_BASE_ADDR)
-
-#define PARENT_RATE_SHIFT 8
-
-static struct clk pll2_clk;
-static struct clk cpu_clk;
-static struct clk emi_clk;
-static struct clk saif0_clk;
-static struct clk saif1_clk;
-static struct clk clk32k_clk;
-static DEFINE_SPINLOCK(clkmux_lock);
-
-/*
- * HW_SAIF_CLKMUX_SEL:
- * DIRECT(0x0): SAIF0 clock pins selected for SAIF0 input clocks, and SAIF1
- * clock pins selected for SAIF1 input clocks.
- * CROSSINPUT(0x1): SAIF1 clock inputs selected for SAIF0 input clocks, and
- * SAIF0 clock inputs selected for SAIF1 input clocks.
- * EXTMSTR0(0x2): SAIF0 clock pin selected for both SAIF0 and SAIF1 input
- * clocks.
- * EXTMSTR1(0x3): SAIF1 clock pin selected for both SAIF0 and SAIF1 input
- * clocks.
- */
-int mxs_saif_clkmux_select(unsigned int clkmux)
-{
- if (clkmux > 0x3)
- return -EINVAL;
-
- spin_lock(&clkmux_lock);
- __raw_writel(BM_DIGCTL_CTRL_SAIF_CLKMUX,
- DIGCTRL_BASE_ADDR + HW_DIGCTL_CTRL + MXS_CLR_ADDR);
- __raw_writel(clkmux << BP_DIGCTL_CTRL_SAIF_CLKMUX,
- DIGCTRL_BASE_ADDR + HW_DIGCTL_CTRL + MXS_SET_ADDR);
- spin_unlock(&clkmux_lock);
-
- return 0;
-}
-
-static int _raw_clk_enable(struct clk *clk)
-{
- u32 reg;
-
- if (clk->enable_reg) {
- reg = __raw_readl(clk->enable_reg);
- reg &= ~(1 << clk->enable_shift);
- __raw_writel(reg, clk->enable_reg);
- }
-
- return 0;
-}
-
-static void _raw_clk_disable(struct clk *clk)
-{
- u32 reg;
-
- if (clk->enable_reg) {
- reg = __raw_readl(clk->enable_reg);
- reg |= 1 << clk->enable_shift;
- __raw_writel(reg, clk->enable_reg);
- }
-}
-
-/*
- * ref_xtal_clk
- */
-static unsigned long ref_xtal_clk_get_rate(struct clk *clk)
-{
- return 24000000;
-}
-
-static struct clk ref_xtal_clk = {
- .get_rate = ref_xtal_clk_get_rate,
-};
-
-/*
- * pll_clk
- */
-static unsigned long pll0_clk_get_rate(struct clk *clk)
-{
- return 480000000;
-}
-
-static unsigned long pll1_clk_get_rate(struct clk *clk)
-{
- return 480000000;
-}
-
-static unsigned long pll2_clk_get_rate(struct clk *clk)
-{
- return 50000000;
-}
-
-#define _CLK_ENABLE_PLL(name, r, g) \
-static int name##_enable(struct clk *clk) \
-{ \
- __raw_writel(BM_CLKCTRL_##r##CTRL0_POWER, \
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_##r##CTRL0_SET); \
- udelay(10); \
- \
- if (clk == &pll2_clk) \
- __raw_writel(BM_CLKCTRL_##r##CTRL0_##g, \
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_##r##CTRL0_CLR); \
- else \
- __raw_writel(BM_CLKCTRL_##r##CTRL0_##g, \
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_##r##CTRL0_SET); \
- \
- return 0; \
-}
-
-_CLK_ENABLE_PLL(pll0_clk, PLL0, EN_USB_CLKS)
-_CLK_ENABLE_PLL(pll1_clk, PLL1, EN_USB_CLKS)
-_CLK_ENABLE_PLL(pll2_clk, PLL2, CLKGATE)
-
-#define _CLK_DISABLE_PLL(name, r, g) \
-static void name##_disable(struct clk *clk) \
-{ \
- __raw_writel(BM_CLKCTRL_##r##CTRL0_POWER, \
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_##r##CTRL0_CLR); \
- \
- if (clk == &pll2_clk) \
- __raw_writel(BM_CLKCTRL_##r##CTRL0_##g, \
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_##r##CTRL0_SET); \
- else \
- __raw_writel(BM_CLKCTRL_##r##CTRL0_##g, \
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_##r##CTRL0_CLR); \
- \
-}
-
-_CLK_DISABLE_PLL(pll0_clk, PLL0, EN_USB_CLKS)
-_CLK_DISABLE_PLL(pll1_clk, PLL1, EN_USB_CLKS)
-_CLK_DISABLE_PLL(pll2_clk, PLL2, CLKGATE)
-
-#define _DEFINE_CLOCK_PLL(name) \
- static struct clk name = { \
- .get_rate = name##_get_rate, \
- .enable = name##_enable, \
- .disable = name##_disable, \
- .parent = &ref_xtal_clk, \
- }
-
-_DEFINE_CLOCK_PLL(pll0_clk);
-_DEFINE_CLOCK_PLL(pll1_clk);
-_DEFINE_CLOCK_PLL(pll2_clk);
-
-/*
- * ref_clk
- */
-#define _CLK_GET_RATE_REF(name, sr, ss) \
-static unsigned long name##_get_rate(struct clk *clk) \
-{ \
- unsigned long parent_rate; \
- u32 reg, div; \
- \
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_##sr); \
- div = (reg >> BP_CLKCTRL_##sr##_##ss##FRAC) & 0x3f; \
- parent_rate = clk_get_rate(clk->parent); \
- \
- return SH_DIV((parent_rate >> PARENT_RATE_SHIFT) * 18, \
- div, PARENT_RATE_SHIFT); \
-}
-
-_CLK_GET_RATE_REF(ref_cpu_clk, FRAC0, CPU)
-_CLK_GET_RATE_REF(ref_emi_clk, FRAC0, EMI)
-_CLK_GET_RATE_REF(ref_io0_clk, FRAC0, IO0)
-_CLK_GET_RATE_REF(ref_io1_clk, FRAC0, IO1)
-_CLK_GET_RATE_REF(ref_pix_clk, FRAC1, PIX)
-_CLK_GET_RATE_REF(ref_gpmi_clk, FRAC1, GPMI)
-
-#define _DEFINE_CLOCK_REF(name, er, es) \
- static struct clk name = { \
- .enable_reg = CLKCTRL_BASE_ADDR + HW_CLKCTRL_##er, \
- .enable_shift = BP_CLKCTRL_##er##_CLKGATE##es, \
- .get_rate = name##_get_rate, \
- .enable = _raw_clk_enable, \
- .disable = _raw_clk_disable, \
- .parent = &pll0_clk, \
- }
-
-_DEFINE_CLOCK_REF(ref_cpu_clk, FRAC0, CPU);
-_DEFINE_CLOCK_REF(ref_emi_clk, FRAC0, EMI);
-_DEFINE_CLOCK_REF(ref_io0_clk, FRAC0, IO0);
-_DEFINE_CLOCK_REF(ref_io1_clk, FRAC0, IO1);
-_DEFINE_CLOCK_REF(ref_pix_clk, FRAC1, PIX);
-_DEFINE_CLOCK_REF(ref_gpmi_clk, FRAC1, GPMI);
-
-/*
- * General clocks
- *
- * clk_get_rate
- */
-static unsigned long lradc_clk_get_rate(struct clk *clk)
-{
- return clk_get_rate(clk->parent) / 16;
-}
-
-static unsigned long rtc_clk_get_rate(struct clk *clk)
-{
- /* ref_xtal_clk is implemented as the only parent */
- return clk_get_rate(clk->parent) / 768;
-}
-
-static unsigned long clk32k_clk_get_rate(struct clk *clk)
-{
- return clk->parent->get_rate(clk->parent) / 750;
-}
-
-static unsigned long spdif_clk_get_rate(struct clk *clk)
-{
- return clk_get_rate(clk->parent) / 4;
-}
-
-#define _CLK_GET_RATE(name, rs) \
-static unsigned long name##_get_rate(struct clk *clk) \
-{ \
- u32 reg, div; \
- \
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_##rs); \
- \
- if (clk->parent == &ref_xtal_clk) \
- div = (reg & BM_CLKCTRL_##rs##_DIV_XTAL) >> \
- BP_CLKCTRL_##rs##_DIV_XTAL; \
- else \
- div = (reg & BM_CLKCTRL_##rs##_DIV_##rs) >> \
- BP_CLKCTRL_##rs##_DIV_##rs; \
- \
- if (!div) \
- return -EINVAL; \
- \
- return clk_get_rate(clk->parent) / div; \
-}
-
-_CLK_GET_RATE(cpu_clk, CPU)
-_CLK_GET_RATE(emi_clk, EMI)
-
-#define _CLK_GET_RATE1(name, rs) \
-static unsigned long name##_get_rate(struct clk *clk) \
-{ \
- u32 reg, div; \
- \
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_##rs); \
- div = (reg & BM_CLKCTRL_##rs##_DIV) >> BP_CLKCTRL_##rs##_DIV; \
- \
- if (!div) \
- return -EINVAL; \
- \
- if (clk == &saif0_clk || clk == &saif1_clk) \
- return clk_get_rate(clk->parent) >> 16 * div; \
- else \
- return clk_get_rate(clk->parent) / div; \
-}
-
-_CLK_GET_RATE1(hbus_clk, HBUS)
-_CLK_GET_RATE1(xbus_clk, XBUS)
-_CLK_GET_RATE1(ssp0_clk, SSP0)
-_CLK_GET_RATE1(ssp1_clk, SSP1)
-_CLK_GET_RATE1(ssp2_clk, SSP2)
-_CLK_GET_RATE1(ssp3_clk, SSP3)
-_CLK_GET_RATE1(gpmi_clk, GPMI)
-_CLK_GET_RATE1(lcdif_clk, DIS_LCDIF)
-_CLK_GET_RATE1(saif0_clk, SAIF0)
-_CLK_GET_RATE1(saif1_clk, SAIF1)
-
-#define _CLK_GET_RATE_STUB(name) \
-static unsigned long name##_get_rate(struct clk *clk) \
-{ \
- return clk_get_rate(clk->parent); \
-}
-
-_CLK_GET_RATE_STUB(uart_clk)
-_CLK_GET_RATE_STUB(pwm_clk)
-_CLK_GET_RATE_STUB(can0_clk)
-_CLK_GET_RATE_STUB(can1_clk)
-_CLK_GET_RATE_STUB(fec_clk)
-
-/*
- * clk_set_rate
- */
-/* fool compiler */
-#define BM_CLKCTRL_CPU_DIV 0
-#define BP_CLKCTRL_CPU_DIV 0
-#define BM_CLKCTRL_CPU_BUSY 0
-
-#define _CLK_SET_RATE(name, dr, fr, fs) \
-static int name##_set_rate(struct clk *clk, unsigned long rate) \
-{ \
- u32 reg, bm_busy, div_max, d, f, div, frac; \
- unsigned long diff, parent_rate, calc_rate; \
- \
- div_max = BM_CLKCTRL_##dr##_DIV >> BP_CLKCTRL_##dr##_DIV; \
- bm_busy = BM_CLKCTRL_##dr##_BUSY; \
- \
- if (clk->parent == &ref_xtal_clk) { \
- parent_rate = clk_get_rate(clk->parent); \
- div = DIV_ROUND_UP(parent_rate, rate); \
- if (clk == &cpu_clk) { \
- div_max = BM_CLKCTRL_CPU_DIV_XTAL >> \
- BP_CLKCTRL_CPU_DIV_XTAL; \
- bm_busy = BM_CLKCTRL_CPU_BUSY_REF_XTAL; \
- } \
- if (div == 0 || div > div_max) \
- return -EINVAL; \
- } else { \
- /* \
- * hack alert: this block modifies clk->parent, too, \
- * so the base to use it the grand parent. \
- */ \
- parent_rate = clk_get_rate(clk->parent->parent); \
- rate >>= PARENT_RATE_SHIFT; \
- parent_rate >>= PARENT_RATE_SHIFT; \
- diff = parent_rate; \
- div = frac = 1; \
- if (clk == &cpu_clk) { \
- div_max = BM_CLKCTRL_CPU_DIV_CPU >> \
- BP_CLKCTRL_CPU_DIV_CPU; \
- bm_busy = BM_CLKCTRL_CPU_BUSY_REF_CPU; \
- } \
- for (d = 1; d <= div_max; d++) { \
- f = parent_rate * 18 / d / rate; \
- if ((parent_rate * 18 / d) % rate) \
- f++; \
- if (f < 18 || f > 35) \
- continue; \
- \
- calc_rate = parent_rate * 18 / f / d; \
- if (calc_rate > rate) \
- continue; \
- \
- if (rate - calc_rate < diff) { \
- frac = f; \
- div = d; \
- diff = rate - calc_rate; \
- } \
- \
- if (diff == 0) \
- break; \
- } \
- \
- if (diff == parent_rate) \
- return -EINVAL; \
- \
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_##fr); \
- reg &= ~BM_CLKCTRL_##fr##_##fs##FRAC; \
- reg |= frac << BP_CLKCTRL_##fr##_##fs##FRAC; \
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_##fr); \
- } \
- \
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_##dr); \
- if (clk == &cpu_clk) { \
- reg &= ~BM_CLKCTRL_CPU_DIV_CPU; \
- reg |= div << BP_CLKCTRL_CPU_DIV_CPU; \
- } else { \
- reg &= ~BM_CLKCTRL_##dr##_DIV; \
- reg |= div << BP_CLKCTRL_##dr##_DIV; \
- if (reg & (1 << clk->enable_shift)) { \
- pr_err("%s: clock is gated\n", __func__); \
- return -EINVAL; \
- } \
- } \
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_##dr); \
- \
- return mxs_clkctrl_timeout(HW_CLKCTRL_##dr, bm_busy); \
-}
-
-_CLK_SET_RATE(cpu_clk, CPU, FRAC0, CPU)
-_CLK_SET_RATE(ssp0_clk, SSP0, FRAC0, IO0)
-_CLK_SET_RATE(ssp1_clk, SSP1, FRAC0, IO0)
-_CLK_SET_RATE(ssp2_clk, SSP2, FRAC0, IO1)
-_CLK_SET_RATE(ssp3_clk, SSP3, FRAC0, IO1)
-_CLK_SET_RATE(lcdif_clk, DIS_LCDIF, FRAC1, PIX)
-_CLK_SET_RATE(gpmi_clk, GPMI, FRAC1, GPMI)
-
-#define _CLK_SET_RATE1(name, dr) \
-static int name##_set_rate(struct clk *clk, unsigned long rate) \
-{ \
- u32 reg, div_max, div; \
- unsigned long parent_rate; \
- \
- parent_rate = clk_get_rate(clk->parent); \
- div_max = BM_CLKCTRL_##dr##_DIV >> BP_CLKCTRL_##dr##_DIV; \
- \
- div = DIV_ROUND_UP(parent_rate, rate); \
- if (div == 0 || div > div_max) \
- return -EINVAL; \
- \
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_##dr); \
- reg &= ~BM_CLKCTRL_##dr##_DIV; \
- reg |= div << BP_CLKCTRL_##dr##_DIV; \
- if (reg & (1 << clk->enable_shift)) { \
- pr_err("%s: clock is gated\n", __func__); \
- return -EINVAL; \
- } \
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_##dr); \
- \
- return mxs_clkctrl_timeout(HW_CLKCTRL_##dr, BM_CLKCTRL_##dr##_BUSY);\
-}
-
-_CLK_SET_RATE1(xbus_clk, XBUS)
-
-/* saif clock uses 16 bits frac div */
-#define _CLK_SET_RATE_SAIF(name, rs) \
-static int name##_set_rate(struct clk *clk, unsigned long rate) \
-{ \
- u16 div; \
- u32 reg; \
- u64 lrate; \
- unsigned long parent_rate; \
- \
- parent_rate = clk_get_rate(clk->parent); \
- if (rate > parent_rate) \
- return -EINVAL; \
- \
- lrate = (u64)rate << 16; \
- do_div(lrate, parent_rate); \
- div = (u16)lrate; \
- \
- if (!div) \
- return -EINVAL; \
- \
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_##rs); \
- reg &= ~BM_CLKCTRL_##rs##_DIV; \
- reg |= div << BP_CLKCTRL_##rs##_DIV; \
- if (reg & (1 << clk->enable_shift)) { \
- pr_err("%s: clock is gated\n", __func__); \
- return -EINVAL; \
- } \
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_##rs); \
- \
- return mxs_clkctrl_timeout(HW_CLKCTRL_##rs, BM_CLKCTRL_##rs##_BUSY);\
-}
-
-_CLK_SET_RATE_SAIF(saif0_clk, SAIF0)
-_CLK_SET_RATE_SAIF(saif1_clk, SAIF1)
-
-#define _CLK_SET_RATE_STUB(name) \
-static int name##_set_rate(struct clk *clk, unsigned long rate) \
-{ \
- return -EINVAL; \
-}
-
-_CLK_SET_RATE_STUB(emi_clk)
-_CLK_SET_RATE_STUB(uart_clk)
-_CLK_SET_RATE_STUB(pwm_clk)
-_CLK_SET_RATE_STUB(spdif_clk)
-_CLK_SET_RATE_STUB(clk32k_clk)
-_CLK_SET_RATE_STUB(can0_clk)
-_CLK_SET_RATE_STUB(can1_clk)
-_CLK_SET_RATE_STUB(fec_clk)
-
-/*
- * clk_set_parent
- */
-#define _CLK_SET_PARENT(name, bit) \
-static int name##_set_parent(struct clk *clk, struct clk *parent) \
-{ \
- if (parent != clk->parent) { \
- __raw_writel(BM_CLKCTRL_CLKSEQ_BYPASS_##bit, \
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_CLKSEQ_TOG); \
- clk->parent = parent; \
- } \
- \
- return 0; \
-}
-
-_CLK_SET_PARENT(cpu_clk, CPU)
-_CLK_SET_PARENT(emi_clk, EMI)
-_CLK_SET_PARENT(ssp0_clk, SSP0)
-_CLK_SET_PARENT(ssp1_clk, SSP1)
-_CLK_SET_PARENT(ssp2_clk, SSP2)
-_CLK_SET_PARENT(ssp3_clk, SSP3)
-_CLK_SET_PARENT(lcdif_clk, DIS_LCDIF)
-_CLK_SET_PARENT(gpmi_clk, GPMI)
-_CLK_SET_PARENT(saif0_clk, SAIF0)
-_CLK_SET_PARENT(saif1_clk, SAIF1)
-
-#define _CLK_SET_PARENT_STUB(name) \
-static int name##_set_parent(struct clk *clk, struct clk *parent) \
-{ \
- if (parent != clk->parent) \
- return -EINVAL; \
- else \
- return 0; \
-}
-
-_CLK_SET_PARENT_STUB(pwm_clk)
-_CLK_SET_PARENT_STUB(uart_clk)
-_CLK_SET_PARENT_STUB(clk32k_clk)
-_CLK_SET_PARENT_STUB(spdif_clk)
-_CLK_SET_PARENT_STUB(fec_clk)
-_CLK_SET_PARENT_STUB(can0_clk)
-_CLK_SET_PARENT_STUB(can1_clk)
-
-/*
- * clk definition
- */
-static struct clk cpu_clk = {
- .get_rate = cpu_clk_get_rate,
- .set_rate = cpu_clk_set_rate,
- .set_parent = cpu_clk_set_parent,
- .parent = &ref_cpu_clk,
-};
-
-static struct clk hbus_clk = {
- .get_rate = hbus_clk_get_rate,
- .parent = &cpu_clk,
-};
-
-static struct clk xbus_clk = {
- .get_rate = xbus_clk_get_rate,
- .set_rate = xbus_clk_set_rate,
- .parent = &ref_xtal_clk,
-};
-
-static struct clk lradc_clk = {
- .get_rate = lradc_clk_get_rate,
- .parent = &clk32k_clk,
-};
-
-static struct clk rtc_clk = {
- .get_rate = rtc_clk_get_rate,
- .parent = &ref_xtal_clk,
-};
-
-/* usb_clk gate is controlled in DIGCTRL other than CLKCTRL */
-static struct clk usb0_clk = {
- .enable_reg = DIGCTRL_BASE_ADDR,
- .enable_shift = 2,
- .enable = _raw_clk_enable,
- .disable = _raw_clk_disable,
- .parent = &pll0_clk,
-};
-
-static struct clk usb1_clk = {
- .enable_reg = DIGCTRL_BASE_ADDR,
- .enable_shift = 16,
- .enable = _raw_clk_enable,
- .disable = _raw_clk_disable,
- .parent = &pll1_clk,
-};
-
-#define _DEFINE_CLOCK(name, er, es, p) \
- static struct clk name = { \
- .enable_reg = CLKCTRL_BASE_ADDR + HW_CLKCTRL_##er, \
- .enable_shift = BP_CLKCTRL_##er##_##es, \
- .get_rate = name##_get_rate, \
- .set_rate = name##_set_rate, \
- .set_parent = name##_set_parent, \
- .enable = _raw_clk_enable, \
- .disable = _raw_clk_disable, \
- .parent = p, \
- }
-
-_DEFINE_CLOCK(emi_clk, EMI, CLKGATE, &ref_xtal_clk);
-_DEFINE_CLOCK(ssp0_clk, SSP0, CLKGATE, &ref_xtal_clk);
-_DEFINE_CLOCK(ssp1_clk, SSP1, CLKGATE, &ref_xtal_clk);
-_DEFINE_CLOCK(ssp2_clk, SSP2, CLKGATE, &ref_xtal_clk);
-_DEFINE_CLOCK(ssp3_clk, SSP3, CLKGATE, &ref_xtal_clk);
-_DEFINE_CLOCK(lcdif_clk, DIS_LCDIF, CLKGATE, &ref_xtal_clk);
-_DEFINE_CLOCK(gpmi_clk, GPMI, CLKGATE, &ref_xtal_clk);
-_DEFINE_CLOCK(saif0_clk, SAIF0, CLKGATE, &ref_xtal_clk);
-_DEFINE_CLOCK(saif1_clk, SAIF1, CLKGATE, &ref_xtal_clk);
-_DEFINE_CLOCK(can0_clk, FLEXCAN, STOP_CAN0, &ref_xtal_clk);
-_DEFINE_CLOCK(can1_clk, FLEXCAN, STOP_CAN1, &ref_xtal_clk);
-_DEFINE_CLOCK(pwm_clk, XTAL, PWM_CLK24M_GATE, &ref_xtal_clk);
-_DEFINE_CLOCK(uart_clk, XTAL, UART_CLK_GATE, &ref_xtal_clk);
-_DEFINE_CLOCK(clk32k_clk, XTAL, TIMROT_CLK32K_GATE, &ref_xtal_clk);
-_DEFINE_CLOCK(spdif_clk, SPDIF, CLKGATE, &pll0_clk);
-_DEFINE_CLOCK(fec_clk, ENET, DISABLE, &hbus_clk);
-
-#define _REGISTER_CLOCK(d, n, c) \
- { \
- .dev_id = d, \
- .con_id = n, \
- .clk = &c, \
- },
-
-static struct clk_lookup lookups[] = {
- /* for amba bus driver */
- _REGISTER_CLOCK("duart", "apb_pclk", xbus_clk)
- /* for amba-pl011 driver */
- _REGISTER_CLOCK("duart", NULL, uart_clk)
- _REGISTER_CLOCK("imx28-fec.0", NULL, fec_clk)
- _REGISTER_CLOCK("imx28-fec.1", NULL, fec_clk)
- _REGISTER_CLOCK("imx28-gpmi-nand", NULL, gpmi_clk)
- _REGISTER_CLOCK("mxs-auart.0", NULL, uart_clk)
- _REGISTER_CLOCK("mxs-auart.1", NULL, uart_clk)
- _REGISTER_CLOCK("mxs-auart.2", NULL, uart_clk)
- _REGISTER_CLOCK("mxs-auart.3", NULL, uart_clk)
- _REGISTER_CLOCK("mxs-auart.4", NULL, uart_clk)
- _REGISTER_CLOCK("rtc", NULL, rtc_clk)
- _REGISTER_CLOCK("pll2", NULL, pll2_clk)
- _REGISTER_CLOCK("mxs-dma-apbh", NULL, hbus_clk)
- _REGISTER_CLOCK("mxs-dma-apbx", NULL, xbus_clk)
- _REGISTER_CLOCK("mxs-mmc.0", NULL, ssp0_clk)
- _REGISTER_CLOCK("mxs-mmc.1", NULL, ssp1_clk)
- _REGISTER_CLOCK("mxs-mmc.2", NULL, ssp2_clk)
- _REGISTER_CLOCK("mxs-mmc.3", NULL, ssp3_clk)
- _REGISTER_CLOCK("flexcan.0", NULL, can0_clk)
- _REGISTER_CLOCK("flexcan.1", NULL, can1_clk)
- _REGISTER_CLOCK(NULL, "usb0", usb0_clk)
- _REGISTER_CLOCK(NULL, "usb1", usb1_clk)
- _REGISTER_CLOCK("mxs-pwm.0", NULL, pwm_clk)
- _REGISTER_CLOCK("mxs-pwm.1", NULL, pwm_clk)
- _REGISTER_CLOCK("mxs-pwm.2", NULL, pwm_clk)
- _REGISTER_CLOCK("mxs-pwm.3", NULL, pwm_clk)
- _REGISTER_CLOCK("mxs-pwm.4", NULL, pwm_clk)
- _REGISTER_CLOCK("mxs-pwm.5", NULL, pwm_clk)
- _REGISTER_CLOCK("mxs-pwm.6", NULL, pwm_clk)
- _REGISTER_CLOCK("mxs-pwm.7", NULL, pwm_clk)
- _REGISTER_CLOCK(NULL, "lradc", lradc_clk)
- _REGISTER_CLOCK(NULL, "spdif", spdif_clk)
- _REGISTER_CLOCK("imx28-fb", NULL, lcdif_clk)
- _REGISTER_CLOCK("mxs-saif.0", NULL, saif0_clk)
- _REGISTER_CLOCK("mxs-saif.1", NULL, saif1_clk)
-};
-
-static int clk_misc_init(void)
-{
- u32 reg;
- int ret;
-
- /* Fix up parent per register setting */
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_CLKSEQ);
- cpu_clk.parent = (reg & BM_CLKCTRL_CLKSEQ_BYPASS_CPU) ?
- &ref_xtal_clk : &ref_cpu_clk;
- emi_clk.parent = (reg & BM_CLKCTRL_CLKSEQ_BYPASS_EMI) ?
- &ref_xtal_clk : &ref_emi_clk;
- ssp0_clk.parent = (reg & BM_CLKCTRL_CLKSEQ_BYPASS_SSP0) ?
- &ref_xtal_clk : &ref_io0_clk;
- ssp1_clk.parent = (reg & BM_CLKCTRL_CLKSEQ_BYPASS_SSP1) ?
- &ref_xtal_clk : &ref_io0_clk;
- ssp2_clk.parent = (reg & BM_CLKCTRL_CLKSEQ_BYPASS_SSP2) ?
- &ref_xtal_clk : &ref_io1_clk;
- ssp3_clk.parent = (reg & BM_CLKCTRL_CLKSEQ_BYPASS_SSP3) ?
- &ref_xtal_clk : &ref_io1_clk;
- lcdif_clk.parent = (reg & BM_CLKCTRL_CLKSEQ_BYPASS_DIS_LCDIF) ?
- &ref_xtal_clk : &ref_pix_clk;
- gpmi_clk.parent = (reg & BM_CLKCTRL_CLKSEQ_BYPASS_GPMI) ?
- &ref_xtal_clk : &ref_gpmi_clk;
- saif0_clk.parent = (reg & BM_CLKCTRL_CLKSEQ_BYPASS_SAIF0) ?
- &ref_xtal_clk : &pll0_clk;
- saif1_clk.parent = (reg & BM_CLKCTRL_CLKSEQ_BYPASS_SAIF1) ?
- &ref_xtal_clk : &pll0_clk;
-
- /* Use int div over frac when both are available */
- __raw_writel(BM_CLKCTRL_CPU_DIV_XTAL_FRAC_EN,
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_CPU_CLR);
- __raw_writel(BM_CLKCTRL_CPU_DIV_CPU_FRAC_EN,
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_CPU_CLR);
- __raw_writel(BM_CLKCTRL_HBUS_DIV_FRAC_EN,
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_HBUS_CLR);
-
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_XBUS);
- reg &= ~BM_CLKCTRL_XBUS_DIV_FRAC_EN;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_XBUS);
-
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_SSP0);
- reg &= ~BM_CLKCTRL_SSP0_DIV_FRAC_EN;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_SSP0);
-
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_SSP1);
- reg &= ~BM_CLKCTRL_SSP1_DIV_FRAC_EN;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_SSP1);
-
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_SSP2);
- reg &= ~BM_CLKCTRL_SSP2_DIV_FRAC_EN;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_SSP2);
-
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_SSP3);
- reg &= ~BM_CLKCTRL_SSP3_DIV_FRAC_EN;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_SSP3);
-
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_GPMI);
- reg &= ~BM_CLKCTRL_GPMI_DIV_FRAC_EN;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_GPMI);
-
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_DIS_LCDIF);
- reg &= ~BM_CLKCTRL_DIS_LCDIF_DIV_FRAC_EN;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_DIS_LCDIF);
-
- /* SAIF has to use frac div for functional operation */
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_SAIF0);
- reg |= BM_CLKCTRL_SAIF0_DIV_FRAC_EN;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_SAIF0);
-
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_SAIF1);
- reg |= BM_CLKCTRL_SAIF1_DIV_FRAC_EN;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_SAIF1);
-
- /*
- * Set safe hbus clock divider. A divider of 3 ensure that
- * the Vddd voltage required for the cpu clock is sufficiently
- * high for the hbus clock.
- */
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_HBUS);
- reg &= BM_CLKCTRL_HBUS_DIV;
- reg |= 3 << BP_CLKCTRL_HBUS_DIV;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_HBUS);
-
- ret = mxs_clkctrl_timeout(HW_CLKCTRL_HBUS, BM_CLKCTRL_HBUS_ASM_BUSY);
-
- /* Gate off cpu clock in WFI for power saving */
- __raw_writel(BM_CLKCTRL_CPU_INTERRUPT_WAIT,
- CLKCTRL_BASE_ADDR + HW_CLKCTRL_CPU_SET);
-
- /*
- * Extra fec clock setting
- * The DENX M28 uses an external clock source
- * and the clock output must not be enabled
- */
- if (!machine_is_m28evk()) {
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_ENET);
- reg &= ~BM_CLKCTRL_ENET_SLEEP;
- reg |= BM_CLKCTRL_ENET_CLK_OUT_EN;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_ENET);
- }
-
- /*
- * 480 MHz seems too high to be ssp clock source directly,
- * so set frac0 to get a 288 MHz ref_io0.
- */
- reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_FRAC0);
- reg &= ~BM_CLKCTRL_FRAC0_IO0FRAC;
- reg |= 30 << BP_CLKCTRL_FRAC0_IO0FRAC;
- __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_FRAC0);
-
- return ret;
-}
-
-int __init mx28_clocks_init(void)
-{
- clk_misc_init();
-
- /*
- * source ssp clock from ref_io0 than ref_xtal,
- * as ref_xtal only provides 24 MHz as maximum.
- */
- clk_set_parent(&ssp0_clk, &ref_io0_clk);
- clk_set_parent(&ssp1_clk, &ref_io0_clk);
- clk_set_parent(&ssp2_clk, &ref_io1_clk);
- clk_set_parent(&ssp3_clk, &ref_io1_clk);
-
- clk_prepare_enable(&cpu_clk);
- clk_prepare_enable(&hbus_clk);
- clk_prepare_enable(&xbus_clk);
- clk_prepare_enable(&emi_clk);
- clk_prepare_enable(&uart_clk);
-
- clk_set_parent(&lcdif_clk, &ref_pix_clk);
- clk_set_parent(&saif0_clk, &pll0_clk);
- clk_set_parent(&saif1_clk, &pll0_clk);
-
- /*
- * Set an initial clock rate for the saif internal logic to work
- * properly. This is important when working in EXTMASTER mode that
- * uses the other saif's BITCLK&LRCLK but it still needs a basic
- * clock which should be fast enough for the internal logic.
- */
- clk_set_rate(&saif0_clk, 24000000);
- clk_set_rate(&saif1_clk, 24000000);
-
- clkdev_add_table(lookups, ARRAY_SIZE(lookups));
-
- mxs_timer_init(&clk32k_clk, MX28_INT_TIMER0);
-
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 00:15:46 +0000