From 38a41fdf94c449c165213e4665c3f8a0d30f8aba Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Sat, 5 Jul 2008 10:02:46 +0200
Subject: [PATCH] IMX: introduce clock API
This patch introduces the clock API for i.MX and converts all
in-Kernel drivers to use it.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
arch/arm/mach-imx/Makefile | 2 +-
arch/arm/mach-imx/clock.c | 205 ++++++++++++++++++++++++++++
arch/arm/mach-imx/cpufreq.c | 20 ++-
arch/arm/mach-imx/generic.c | 76 -----------
arch/arm/mach-imx/time.c | 23 +++-
drivers/mmc/host/imxmmc.c | 19 ++-
drivers/serial/imx.c | 25 +++-
drivers/spi/spi_imx.c | 38 ++++--
include/asm-arm/arch-imx/hardware.h | 8 --
9 files changed, 307 insertions(+), 109 deletions(-)
create mode 100644 arch/arm/mach-imx/clock.c
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 88d5e61a2e13d..b047c7e795a97 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -4,7 +4,7 @@
# Object file lists.
-obj-y += irq.o time.o dma.o generic.o
+obj-y += irq.o time.o dma.o generic.o clock.o
obj-$(CONFIG_CPU_FREQ_IMX) += cpufreq.o
diff --git a/arch/arm/mach-imx/clock.c b/arch/arm/mach-imx/clock.c
new file mode 100644
index 0000000000000..6a90fe5578df9
--- /dev/null
+++ b/arch/arm/mach-imx/clock.c
@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/math64.h>
+#include <linux/err.h>
+
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+
+/*
+ * Very simple approach: We can't disable clocks, so we do
+ * not need refcounting
+ */
+
+struct clk {
+ struct list_head node;
+ const char *name;
+ unsigned long (*get_rate)(void);
+};
+
+/*
+ * get the system pll clock in Hz
+ *
+ * mfi + mfn / (mfd +1)
+ * f = 2 * f_ref * --------------------
+ * pd + 1
+ */
+static unsigned long imx_decode_pll(unsigned int pll, u32 f_ref)
+{
+ unsigned long long ll;
+ unsigned long quot;
+
+ u32 mfi = (pll >> 10) & 0xf;
+ u32 mfn = pll & 0x3ff;
+ u32 mfd = (pll >> 16) & 0x3ff;
+ u32 pd = (pll >> 26) & 0xf;
+
+ mfi = mfi <= 5 ? 5 : mfi;
+
+ ll = 2 * (unsigned long long)f_ref *
+ ((mfi << 16) + (mfn << 16) / (mfd + 1));
+ quot = (pd + 1) * (1 << 16);
+ ll += quot / 2;
+ do_div(ll, quot);
+ return (unsigned long)ll;
+}
+
+static unsigned long imx_get_system_clk(void)
+{
+ u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
+
+ return imx_decode_pll(SPCTL0, f_ref);
+}
+
+static unsigned long imx_get_mcu_clk(void)
+{
+ return imx_decode_pll(MPCTL0, CLK32 * 512);
+}
+
+/*
+ * get peripheral clock 1 ( UART[12], Timer[12], PWM )
+ */
+static unsigned long imx_get_perclk1(void)
+{
+ return imx_get_system_clk() / (((PCDR) & 0xf)+1);
+}
+
+/*
+ * get peripheral clock 2 ( LCD, SD, SPI[12] )
+ */
+static unsigned long imx_get_perclk2(void)
+{
+ return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
+}
+
+/*
+ * get peripheral clock 3 ( SSI )
+ */
+static unsigned long imx_get_perclk3(void)
+{
+ return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
+}
+
+/*
+ * get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
+ */
+static unsigned long imx_get_hclk(void)
+{
+ return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
+}
+
+static struct clk clk_system_clk = {
+ .name = "system_clk",
+ .get_rate = imx_get_system_clk,
+};
+
+static struct clk clk_hclk = {
+ .name = "hclk",
+ .get_rate = imx_get_hclk,
+};
+
+static struct clk clk_mcu_clk = {
+ .name = "mcu_clk",
+ .get_rate = imx_get_mcu_clk,
+};
+
+static struct clk clk_perclk1 = {
+ .name = "perclk1",
+ .get_rate = imx_get_perclk1,
+};
+
+static struct clk clk_uart_clk = {
+ .name = "uart_clk",
+ .get_rate = imx_get_perclk1,
+};
+
+static struct clk clk_perclk2 = {
+ .name = "perclk2",
+ .get_rate = imx_get_perclk2,
+};
+
+static struct clk clk_perclk3 = {
+ .name = "perclk3",
+ .get_rate = imx_get_perclk3,
+};
+
+static struct clk *clks[] = {
+ &clk_perclk1,
+ &clk_perclk2,
+ &clk_perclk3,
+ &clk_system_clk,
+ &clk_hclk,
+ &clk_mcu_clk,
+ &clk_uart_clk,
+};
+
+static LIST_HEAD(clocks);
+static DEFINE_MUTEX(clocks_mutex);
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+ struct clk *p, *clk = ERR_PTR(-ENOENT);
+
+ mutex_lock(&clocks_mutex);
+ list_for_each_entry(p, &clocks, node) {
+ if (!strcmp(p->name, id)) {
+ clk = p;
+ goto found;
+ }
+ }
+
+found:
+ mutex_unlock(&clocks_mutex);
+
+ return clk;
+}
+
+void clk_put(struct clk *clk)
+{
+}
+
+int clk_enable(struct clk *clk)
+{
+ return 0;
+}
+
+void clk_disable(struct clk *clk)
+{
+}
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+ return clk->get_rate();
+}
+
+int imx_clocks_init(void)
+{
+ int i;
+
+ mutex_lock(&clocks_mutex);
+ for (i = 0; i < ARRAY_SIZE(clks); i++)
+ list_add(&clks[i]->node, &clocks);
+ mutex_unlock(&clocks_mutex);
+
+ return 0;
+}
+
diff --git a/arch/arm/mach-imx/cpufreq.c b/arch/arm/mach-imx/cpufreq.c
index e548ba74a4d2a..be0809b33e089 100644
--- a/arch/arm/mach-imx/cpufreq.c
+++ b/arch/arm/mach-imx/cpufreq.c
@@ -32,6 +32,8 @@
#include <linux/types.h>
#include <linux/init.h>
#include <linux/cpufreq.h>
+#include <linux/clk.h>
+#include <linux/err.h>
#include <asm/system.h>
#include <asm/hardware.h>
@@ -52,6 +54,8 @@
static u32 mpctl0_at_boot;
static u32 bclk_div_at_boot;
+static struct clk *system_clk, *mcu_clk;
+
static void imx_set_async_mode(void)
{
adjust_cr(CR_920T_CLOCK_MODE, CR_920T_ASYNC_MODE);
@@ -160,10 +164,10 @@ static unsigned int imx_get_speed(unsigned int cpu)
cr = get_cr();
if((cr & CR_920T_CLOCK_MODE) == CR_920T_FASTBUS_MODE) {
- freq = imx_get_system_clk();
+ freq = clk_get_rate(system_clk);
freq = (freq + bclk_div/2) / bclk_div;
} else {
- freq = imx_get_mcu_clk();
+ freq = clk_get_rate(mcu_clk);
if (cscr & CSCR_MPU_PRESC)
freq /= 2;
}
@@ -201,7 +205,7 @@ static int imx_set_target(struct cpufreq_policy *policy,
pr_debug(KERN_DEBUG "imx: requested frequency %ld Hz, mpctl0 at boot 0x%08x\n",
freq, mpctl0_at_boot);
- sysclk = imx_get_system_clk();
+ sysclk = clk_get_rate(system_clk);
if (freq > sysclk / bclk_div_at_boot + 1000000) {
freq = imx_compute_mpctl(&mpctl0, mpctl0_at_boot, CLK32 * 512, freq, relation);
@@ -290,6 +294,16 @@ static int __init imx_cpufreq_init(void)
bclk_div_at_boot = __mfld2val(CSCR_BCLK_DIV, CSCR) + 1;
mpctl0_at_boot = 0;
+ system_clk = clk_get(NULL, "system_clk");
+ if (IS_ERR(system_clk))
+ return PTR_ERR(system_clk);
+
+ mcu_clk = clk_get(NULL, "mcu_clk");
+ if (IS_ERR(mcu_clk)) {
+ clk_put(system_clk);
+ return PTR_ERR(mcu_clk);
+ }
+
if((CSCR & CSCR_MPEN) &&
((get_cr() & CR_920T_CLOCK_MODE) != CR_920T_FASTBUS_MODE))
mpctl0_at_boot = MPCTL0;
diff --git a/arch/arm/mach-imx/generic.c b/arch/arm/mach-imx/generic.c
index 4cfc9d3af28a1..98ddd8a6d05fb 100644
--- a/arch/arm/mach-imx/generic.c
+++ b/arch/arm/mach-imx/generic.c
@@ -214,82 +214,6 @@ int imx_irq_to_gpio(unsigned irq)
EXPORT_SYMBOL(imx_irq_to_gpio);
-/*
- * get the system pll clock in Hz
- *
- * mfi + mfn / (mfd +1)
- * f = 2 * f_ref * --------------------
- * pd + 1
- */
-static unsigned int imx_decode_pll(unsigned int pll, u32 f_ref)
-{
- unsigned long long ll;
- unsigned long quot;
-
- u32 mfi = (pll >> 10) & 0xf;
- u32 mfn = pll & 0x3ff;
- u32 mfd = (pll >> 16) & 0x3ff;
- u32 pd = (pll >> 26) & 0xf;
-
- mfi = mfi <= 5 ? 5 : mfi;
-
- ll = 2 * (unsigned long long)f_ref * ( (mfi<<16) + (mfn<<16) / (mfd+1) );
- quot = (pd+1) * (1<<16);
- ll += quot / 2;
- do_div(ll, quot);
- return (unsigned int) ll;
-}
-
-unsigned int imx_get_system_clk(void)
-{
- u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
-
- return imx_decode_pll(SPCTL0, f_ref);
-}
-EXPORT_SYMBOL(imx_get_system_clk);
-
-unsigned int imx_get_mcu_clk(void)
-{
- return imx_decode_pll(MPCTL0, CLK32 * 512);
-}
-EXPORT_SYMBOL(imx_get_mcu_clk);
-
-/*
- * get peripheral clock 1 ( UART[12], Timer[12], PWM )
- */
-unsigned int imx_get_perclk1(void)
-{
- return imx_get_system_clk() / (((PCDR) & 0xf)+1);
-}
-EXPORT_SYMBOL(imx_get_perclk1);
-
-/*
- * get peripheral clock 2 ( LCD, SD, SPI[12] )
- */
-unsigned int imx_get_perclk2(void)
-{
- return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
-}
-EXPORT_SYMBOL(imx_get_perclk2);
-
-/*
- * get peripheral clock 3 ( SSI )
- */
-unsigned int imx_get_perclk3(void)
-{
- return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
-}
-EXPORT_SYMBOL(imx_get_perclk3);
-
-/*
- * get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
- */
-unsigned int imx_get_hclk(void)
-{
- return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
-}
-EXPORT_SYMBOL(imx_get_hclk);
-
static struct resource imx_mmc_resources[] = {
[0] = {
.start = 0x00214000,
diff --git a/arch/arm/mach-imx/time.c b/arch/arm/mach-imx/time.c
index d86d124aea229..5a41e96e85860 100644
--- a/arch/arm/mach-imx/time.c
+++ b/arch/arm/mach-imx/time.c
@@ -17,6 +17,7 @@
#include <linux/time.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
+#include <linux/clk.h>
#include <asm/hardware.h>
#include <asm/io.h>
@@ -86,10 +87,10 @@ static struct clocksource clocksource_imx = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-static int __init imx_clocksource_init(void)
+static int __init imx_clocksource_init(unsigned long rate)
{
clocksource_imx.mult =
- clocksource_hz2mult(imx_get_perclk1(), clocksource_imx.shift);
+ clocksource_hz2mult(rate, clocksource_imx.shift);
clocksource_register(&clocksource_imx);
return 0;
@@ -174,9 +175,9 @@ static struct clock_event_device clockevent_imx = {
.rating = 200,
};
-static int __init imx_clockevent_init(void)
+static int __init imx_clockevent_init(unsigned long rate)
{
- clockevent_imx.mult = div_sc(imx_get_perclk1(), NSEC_PER_SEC,
+ clockevent_imx.mult = div_sc(rate, NSEC_PER_SEC,
clockevent_imx.shift);
clockevent_imx.max_delta_ns =
clockevent_delta2ns(0xfffffffe, &clockevent_imx);
@@ -190,13 +191,23 @@ static int __init imx_clockevent_init(void)
return 0;
}
+extern int imx_clocks_init(void);
static void __init imx_timer_init(void)
{
+ struct clk *clk;
+ unsigned long rate;
+
+ imx_clocks_init();
+
+ clk = clk_get(NULL, "perclk1");
+ clk_enable(clk);
+ rate = clk_get_rate(clk);
+
imx_timer_hardware_init();
- imx_clocksource_init();
+ imx_clocksource_init(rate);
- imx_clockevent_init();
+ imx_clockevent_init(rate);
/*
* Make irqs happen for the system timer
diff --git a/drivers/mmc/host/imxmmc.c b/drivers/mmc/host/imxmmc.c
index 95f33e87a99ce..ef2f6fc865411 100644
--- a/drivers/mmc/host/imxmmc.c
+++ b/drivers/mmc/host/imxmmc.c
@@ -42,6 +42,7 @@
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
#include <linux/delay.h>
+#include <linux/clk.h>
#include <asm/dma.h>
#include <asm/io.h>
@@ -92,6 +93,8 @@ struct imxmci_host {
unsigned char actual_bus_width;
int prev_cmd_code;
+
+ struct clk *clk;
};
#define IMXMCI_PEND_IRQ_b 0
@@ -841,7 +844,7 @@ static void imxmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
/* The prescaler is 5 for PERCLK2 equal to 96MHz
* then 96MHz / 5 = 19.2 MHz
*/
- clk=imx_get_perclk2();
+ clk = clk_get_rate(host->clk);
prescaler=(clk+(CLK_RATE*7)/8)/CLK_RATE;
switch(prescaler) {
case 0:
@@ -994,6 +997,13 @@ static int imxmci_probe(struct platform_device *pdev)
host->res = r;
host->irq = irq;
+ host->clk = clk_get(&pdev->dev, "perclk2");
+ if (IS_ERR(host->clk)) {
+ ret = PTR_ERR(host->clk);
+ goto out;
+ }
+ clk_enable(host->clk);
+
imx_gpio_mode(PB8_PF_SD_DAT0);
imx_gpio_mode(PB9_PF_SD_DAT1);
imx_gpio_mode(PB10_PF_SD_DAT2);
@@ -1053,6 +1063,10 @@ static int imxmci_probe(struct platform_device *pdev)
imx_dma_free(host->dma);
host->dma_allocated=0;
}
+ if (host->clk) {
+ clk_disable(host->clk);
+ clk_put(host->clk);
+ }
}
if (mmc)
mmc_free_host(mmc);
@@ -1082,6 +1096,9 @@ static int imxmci_remove(struct platform_device *pdev)
tasklet_kill(&host->tasklet);
+ clk_disable(host->clk);
+ clk_put(host->clk);
+
release_resource(host->res);
mmc_free_host(mmc);
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 8d6cb745bd93c..9e2162ebf1bb8 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -40,6 +40,7 @@
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
+#include <linux/clk.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -184,6 +185,7 @@ struct imx_port {
unsigned int old_status;
int txirq,rxirq,rtsirq;
int have_rtscts:1;
+ struct clk *clk;
};
/*
@@ -479,7 +481,8 @@ static int imx_setup_ufcr(struct imx_port *sport, unsigned int mode)
* RFDIV is set such way to satisfy requested uartclk value
*/
val = TXTL << 10 | RXTL;
- ufcr_rfdiv = (imx_get_perclk1() + sport->port.uartclk / 2) / sport->port.uartclk;
+ ufcr_rfdiv = (clk_get_rate(sport->clk) + sport->port.uartclk / 2)
+ / sport->port.uartclk;
if(!ufcr_rfdiv)
ufcr_rfdiv = 1;
@@ -916,7 +919,7 @@ imx_console_get_options(struct imx_port *sport, int *baud,
else
ucfr_rfdiv = 6 - ucfr_rfdiv;
- uartclk = imx_get_perclk1();
+ uartclk = clk_get_rate(sport->clk);
uartclk /= ucfr_rfdiv;
{ /*
@@ -1054,7 +1057,15 @@ static int serial_imx_probe(struct platform_device *pdev)
init_timer(&sport->timer);
sport->timer.function = imx_timeout;
sport->timer.data = (unsigned long)sport;
- sport->port.uartclk = imx_get_perclk1();
+
+ sport->clk = clk_get(&pdev->dev, "uart_clk");
+ if (IS_ERR(sport->clk)) {
+ ret = PTR_ERR(sport->clk);
+ goto unmap;
+ }
+ clk_enable(sport->clk);
+
+ sport->port.uartclk = clk_get_rate(sport->clk);
imx_ports[pdev->id] = sport;
@@ -1069,6 +1080,8 @@ static int serial_imx_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, &sport->port);
return 0;
+unmap:
+ iounmap(sport->port.membase);
free:
kfree(sport);
@@ -1084,8 +1097,12 @@ static int serial_imx_remove(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
- if (sport)
+ if (sport) {
uart_remove_one_port(&imx_reg, &sport->port);
+ clk_put(sport->clk);
+ }
+
+ clk_disable(sport->clk);
if (pdata->exit)
pdata->exit(pdev);
diff --git a/drivers/spi/spi_imx.c b/drivers/spi/spi_imx.c
index c730d05bfeb68..bd0729b6b6ed3 100644
--- a/drivers/spi/spi_imx.c
+++ b/drivers/spi/spi_imx.c
@@ -29,6 +29,7 @@
#include <linux/spi/spi.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
+#include <linux/clk.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -250,6 +251,8 @@ struct driver_data {
int tx_dma_needs_unmap;
size_t tx_map_len;
u32 dummy_dma_buf ____cacheline_aligned;
+
+ struct clk *clk;
};
/* Runtime state */
@@ -855,15 +858,15 @@ static irqreturn_t spi_int(int irq, void *dev_id)
return drv_data->transfer_handler(drv_data);
}
-static inline u32 spi_speed_hz(u32 data_rate)
+static inline u32 spi_speed_hz(struct driver_data *drv_data, u32 data_rate)
{
- return imx_get_perclk2() / (4 << ((data_rate) >> 13));
+ return clk_get_rate(drv_data->clk) / (4 << ((data_rate) >> 13));
}
-static u32 spi_data_rate(u32 speed_hz)
+static u32 spi_data_rate(struct driver_data *drv_data, u32 speed_hz)
{
u32 div;
- u32 quantized_hz = imx_get_perclk2() >> 2;
+ u32 quantized_hz = clk_get_rate(drv_data->clk) >> 2;
for (div = SPI_PERCLK2_DIV_MIN;
div <= SPI_PERCLK2_DIV_MAX;
@@ -947,7 +950,7 @@ static void pump_transfers(unsigned long data)
tmp = transfer->speed_hz;
if (tmp == 0)
tmp = chip->max_speed_hz;
- tmp = spi_data_rate(tmp);
+ tmp = spi_data_rate(drv_data, tmp);
u32_EDIT(control, SPI_CONTROL_DATARATE, tmp);
writel(control, regs + SPI_CONTROL);
@@ -1109,7 +1112,7 @@ static int transfer(struct spi_device *spi, struct spi_message *msg)
msg->actual_length = 0;
/* Per transfer setup check */
- min_speed_hz = spi_speed_hz(SPI_CONTROL_DATARATE_MIN);
+ min_speed_hz = spi_speed_hz(drv_data, SPI_CONTROL_DATARATE_MIN);
max_speed_hz = spi->max_speed_hz;
list_for_each_entry(trans, &msg->transfers, transfer_list) {
tmp = trans->bits_per_word;
@@ -1176,6 +1179,7 @@ static int transfer(struct spi_device *spi, struct spi_message *msg)
applied and notified to the calling driver. */
static int setup(struct spi_device *spi)
{
+ struct driver_data *drv_data = spi_master_get_devdata(spi->master);
struct spi_imx_chip *chip_info;
struct chip_data *chip;
int first_setup = 0;
@@ -1304,14 +1308,14 @@ static int setup(struct spi_device *spi)
chip->n_bytes = (tmp <= 8) ? 1 : 2;
/* SPI datarate */
- tmp = spi_data_rate(spi->max_speed_hz);
+ tmp = spi_data_rate(drv_data, spi->max_speed_hz);
if (tmp == SPI_CONTROL_DATARATE_BAD) {
status = -EINVAL;
dev_err(&spi->dev,
"setup - "
"HW min speed (%d Hz) exceeds required "
"max speed (%d Hz)\n",
- spi_speed_hz(SPI_CONTROL_DATARATE_MIN),
+ spi_speed_hz(drv_data, SPI_CONTROL_DATARATE_MIN),
spi->max_speed_hz);
if (first_setup)
goto err_first_setup;
@@ -1321,7 +1325,7 @@ static int setup(struct spi_device *spi)
} else {
u32_EDIT(chip->control, SPI_CONTROL_DATARATE, tmp);
/* Actual rounded max_speed_hz */
- tmp = spi_speed_hz(tmp);
+ tmp = spi_speed_hz(drv_data, tmp);
spi->max_speed_hz = tmp;
chip->max_speed_hz = tmp;
}
@@ -1352,7 +1356,7 @@ static int setup(struct spi_device *spi)
chip->period & SPI_PERIOD_WAIT,
spi->mode,
spi->bits_per_word,
- spi_speed_hz(SPI_CONTROL_DATARATE_MIN),
+ spi_speed_hz(drv_data, SPI_CONTROL_DATARATE_MIN),
spi->max_speed_hz);
return status;
@@ -1465,6 +1469,14 @@ static int __init spi_imx_probe(struct platform_device *pdev)
goto err_no_pdata;
}
+ drv_data->clk = clk_get(&pdev->dev, "perclk2");
+ if (IS_ERR(drv_data->clk)) {
+ dev_err(&pdev->dev, "probe - cannot get get\n");
+ status = PTR_ERR(drv_data->clk);
+ goto err_no_clk;
+ }
+ clk_enable(drv_data->clk);
+
/* Allocate master with space for drv_data */
master = spi_alloc_master(dev, sizeof(struct driver_data));
if (!master) {
@@ -1623,6 +1635,9 @@ static int __init spi_imx_probe(struct platform_device *pdev)
spi_master_put(master);
err_no_pdata:
+ clk_disable(drv_data->clk);
+ clk_put(drv_data->clk);
+err_no_clk:
err_no_mem:
return status;
}
@@ -1662,6 +1677,9 @@ static int __exit spi_imx_remove(struct platform_device *pdev)
if (irq >= 0)
free_irq(irq, drv_data);
+ clk_disable(drv_data->clk);
+ clk_put(drv_data->clk);
+
/* Release map resources */
iounmap(drv_data->regs);
release_resource(drv_data->ioarea);
diff --git a/include/asm-arm/arch-imx/hardware.h b/include/asm-arm/arch-imx/hardware.h
index adffb6acf42a2..6542ca5e8c33f 100644
--- a/include/asm-arm/arch-imx/hardware.h
+++ b/include/asm-arm/arch-imx/hardware.h
@@ -73,14 +73,6 @@
*/
extern void imx_gpio_mode( int gpio_mode );
-/* get frequencies in Hz */
-extern unsigned int imx_get_system_clk(void);
-extern unsigned int imx_get_mcu_clk(void);
-extern unsigned int imx_get_perclk1(void); /* UART[12], Timer[12], PWM */
-extern unsigned int imx_get_perclk2(void); /* LCD, SD, SPI[12] */
-extern unsigned int imx_get_perclk3(void); /* SSI */
-extern unsigned int imx_get_hclk(void); /* SDRAM, CSI, Memory Stick,*/
- /* I2C, DMA */
#endif
#define MAXIRQNUM 62
--
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