4 files changed, 66 insertions, 39 deletions

diff --git a/drivers/clk/mxs/Makefile b/drivers/clk/mxs/Makefile
index 7bedeec08524..a6a22237e860 100644
--- a/drivers/clk/mxs/Makefile
+++ b/drivers/clk/mxs/Makefile
@@ -2,7 +2,7 @@
 # Makefile for mxs specific clk
 #
 
-obj-y += clk.o clk-pll.o clk-ref.o clk-div.o clk-frac.o
+obj-y += clk.o clk-pll.o clk-ref.o clk-div.o clk-frac.o clk-ssp.o
 
 obj-$(CONFIG_SOC_IMX23) += clk-imx23.o
 obj-$(CONFIG_SOC_IMX28) += clk-imx28.o
diff --git a/drivers/clk/mxs/clk-ssp.c b/drivers/clk/mxs/clk-ssp.c
new file mode 100644
index 000000000000..af7bdbf9ebd7
--- /dev/null
+++ b/drivers/clk/mxs/clk-ssp.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2012 DENX Software Engineering, GmbH
+ *
+ * Pulled from code:
+ * Portions copyright (C) 2003 Russell King, PXA MMCI Driver
+ * Portions copyright (C) 2004-2005 Pierre Ossman, W83L51xD SD/MMC driver
+ *
+ * Copyright 2008 Embedded Alley Solutions, Inc.
+ * Copyright 2009-2011 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/spi/mxs-spi.h>
+
+void mxs_ssp_set_clk_rate(struct mxs_ssp *ssp, unsigned int rate)
+{
+        unsigned int ssp_clk, ssp_sck;
+        u32 clock_divide, clock_rate;
+        u32 val;
+
+        ssp_clk = clk_get_rate(ssp->clk);
+
+        for (clock_divide = 2; clock_divide <= 254; clock_divide += 2) {
+                clock_rate = DIV_ROUND_UP(ssp_clk, rate * clock_divide);
+                clock_rate = (clock_rate > 0) ? clock_rate - 1 : 0;
+                if (clock_rate <= 255)
+                        break;
+        }
+
+        if (clock_divide > 254) {
+                dev_err(ssp->dev,
+                        "%s: cannot set clock to %d\n", __func__, rate);
+                return;
+        }
+
+        ssp_sck = ssp_clk / clock_divide / (1 + clock_rate);
+
+        val = readl(ssp->base + HW_SSP_TIMING(ssp));
+        val &= ~(BM_SSP_TIMING_CLOCK_DIVIDE | BM_SSP_TIMING_CLOCK_RATE);
+        val |= BF_SSP(clock_divide, TIMING_CLOCK_DIVIDE);
+        val |= BF_SSP(clock_rate, TIMING_CLOCK_RATE);
+        writel(val, ssp->base + HW_SSP_TIMING(ssp));
+
+        ssp->clk_rate = ssp_sck;
+
+        dev_dbg(ssp->dev,
+                "%s: clock_divide %d, clock_rate %d, ssp_clk %d, rate_actual %d, rate_requested %d\n",
+                __func__, clock_divide, clock_rate, ssp_clk, ssp_sck, rate);
+}
+EXPORT_SYMBOL_GPL(mxs_ssp_set_clk_rate);
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index 7b85e035a4cb..0813340fa29c 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -501,43 +501,6 @@ static void mxs_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
         mxs_mmc_start_cmd(host, mrq->cmd);
 }
 
-static void mxs_mmc_set_clk_rate(struct mxs_mmc_host *host, unsigned int rate)
-{
-        struct mxs_ssp *ssp = &host->ssp;
-        unsigned int ssp_clk, ssp_sck;
-        u32 clock_divide, clock_rate;
-        u32 val;
-
-        ssp_clk = clk_get_rate(ssp->clk);
-
-        for (clock_divide = 2; clock_divide <= 254; clock_divide += 2) {
-                clock_rate = DIV_ROUND_UP(ssp_clk, rate * clock_divide);
-                clock_rate = (clock_rate > 0) ? clock_rate - 1 : 0;
-                if (clock_rate <= 255)
-                        break;
-        }
-
-        if (clock_divide > 254) {
-                dev_err(mmc_dev(host->mmc),
-                        "%s: cannot set clock to %d\n", __func__, rate);
-                return;
-        }
-
-        ssp_sck = ssp_clk / clock_divide / (1 + clock_rate);
-
-        val = readl(ssp->base + HW_SSP_TIMING(ssp));
-        val &= ~(BM_SSP_TIMING_CLOCK_DIVIDE | BM_SSP_TIMING_CLOCK_RATE);
-        val |= BF_SSP(clock_divide, TIMING_CLOCK_DIVIDE);
-        val |= BF_SSP(clock_rate, TIMING_CLOCK_RATE);
-        writel(val, ssp->base + HW_SSP_TIMING(ssp));
-
-        ssp->clk_rate = ssp_sck;
-
-        dev_dbg(mmc_dev(host->mmc),
-                "%s: clock_divide %d, clock_rate %d, ssp_clk %d, rate_actual %d, rate_requested %d\n",
-                __func__, clock_divide, clock_rate, ssp_clk, ssp_sck, rate);
-}
-
 static void mxs_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
         struct mxs_mmc_host *host = mmc_priv(mmc);
@@ -550,7 +513,7 @@ static void mxs_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
                 host->bus_width = 0;
 
         if (ios->clock)
-                mxs_mmc_set_clk_rate(host, ios->clock);
+                mxs_ssp_set_clk_rate(&host->ssp, ios->clock);
 }
 
 static void mxs_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
diff --git a/include/linux/spi/mxs-spi.h b/include/linux/spi/mxs-spi.h
index 475f69fb896f..d07f8dc7fdd9 100644
--- a/include/linux/spi/mxs-spi.h
+++ b/include/linux/spi/mxs-spi.h
@@ -136,4 +136,6 @@ struct mxs_ssp {
         enum mxs_ssp_id                 devid;
 };
 
+void mxs_ssp_set_clk_rate(struct mxs_ssp *ssp, unsigned int rate);
+
 #endif  /* __LINUX_SPI_MXS_SPI_H__ */