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authorOlof Johansson <olof@lixom.net>2012-05-12 22:33:24 -0700
committerOlof Johansson <olof@lixom.net>2012-05-12 22:33:24 -0700
commite29402edf848359d619ce06af86d61e62c292c87 (patch)
tree94451c1d400d478654e0d0e78564e882081b806c /drivers/mmc
parentbf98a6eaa9964fef49f186834713bfc57d16ede1 (diff)
parent530f1d416091212243b341e0022b2967886b30e4 (diff)
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Merge branch 'mxs/dt/for-3.5' of git://git.linaro.org/people/shawnguo/linux-2.6 into next/dt2
* 'mxs/dt/for-3.5' of git://git.linaro.org/people/shawnguo/linux-2.6: (51 commits) ARM: dts: enable audio support for imx28-evk ARM: dts: enable i2c device for imx28-evk i2c: mxs: add device tree probe support ARM: dts: enable mmc for imx28-evk ARM: dts: enable mmc for imx23-evk mmc: mxs-mmc: add device tree support mmc: mxs-mmc: copy wp_gpio in struct mxs_mmc_host mmc: mxs-mmc: have dma_channel than dma_res in mxs_mmc_host mmc: mxs-mmc: use devm_* helper to make cleanup simpler mmc: mxs-mmc: move header from mach into linux folder mmc: mxs-mmc: get rid of the use of cpu_is_xxx mmc: mxs-mmc: let ssp_is_old take host as parameter mmc: mxs-mmc: use global stmp_device functionality ARM: mxs: add gpio support for device tree boot gpio/mxs: add device tree probe gpio/mxs: get rid of the use of cpu_is_xxx gpio/mxs: use devm_* helpers to make error handling simple ARM: mxs: add mxs-dma dt support ARM: mxs: do not add dma device by default dma: mxs-dma: add device tree probe support ...
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/mxs-mmc.c203
-rw-r--r--drivers/mmc/host/sdhci-esdhc-imx.c9
2 files changed, 127 insertions, 85 deletions
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index e3f5af96ab87..34a90266ab11 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -23,6 +23,9 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ioport.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
@@ -39,18 +42,16 @@
#include <linux/regulator/consumer.h>
#include <linux/module.h>
#include <linux/fsl/mxs-dma.h>
-
-#include <mach/mxs.h>
-#include <mach/common.h>
-#include <mach/mmc.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/stmp_device.h>
+#include <linux/mmc/mxs-mmc.h>
#define DRIVER_NAME "mxs-mmc"
/* card detect polling timeout */
#define MXS_MMC_DETECT_TIMEOUT (HZ/2)
-#define SSP_VERSION_LATEST 4
-#define ssp_is_old() (host->version < SSP_VERSION_LATEST)
+#define ssp_is_old(host) ((host)->devid == IMX23_MMC)
/* SSP registers */
#define HW_SSP_CTRL0 0x000
@@ -85,14 +86,14 @@
#define BM_SSP_BLOCK_SIZE_BLOCK_COUNT (0xffffff << 4)
#define BP_SSP_BLOCK_SIZE_BLOCK_SIZE (0)
#define BM_SSP_BLOCK_SIZE_BLOCK_SIZE (0xf)
-#define HW_SSP_TIMING (ssp_is_old() ? 0x050 : 0x070)
+#define HW_SSP_TIMING(h) (ssp_is_old(h) ? 0x050 : 0x070)
#define BP_SSP_TIMING_TIMEOUT (16)
#define BM_SSP_TIMING_TIMEOUT (0xffff << 16)
#define BP_SSP_TIMING_CLOCK_DIVIDE (8)
#define BM_SSP_TIMING_CLOCK_DIVIDE (0xff << 8)
#define BP_SSP_TIMING_CLOCK_RATE (0)
#define BM_SSP_TIMING_CLOCK_RATE (0xff)
-#define HW_SSP_CTRL1 (ssp_is_old() ? 0x060 : 0x080)
+#define HW_SSP_CTRL1(h) (ssp_is_old(h) ? 0x060 : 0x080)
#define BM_SSP_CTRL1_SDIO_IRQ (1 << 31)
#define BM_SSP_CTRL1_SDIO_IRQ_EN (1 << 30)
#define BM_SSP_CTRL1_RESP_ERR_IRQ (1 << 29)
@@ -115,15 +116,13 @@
#define BM_SSP_CTRL1_WORD_LENGTH (0xf << 4)
#define BP_SSP_CTRL1_SSP_MODE (0)
#define BM_SSP_CTRL1_SSP_MODE (0xf)
-#define HW_SSP_SDRESP0 (ssp_is_old() ? 0x080 : 0x0a0)
-#define HW_SSP_SDRESP1 (ssp_is_old() ? 0x090 : 0x0b0)
-#define HW_SSP_SDRESP2 (ssp_is_old() ? 0x0a0 : 0x0c0)
-#define HW_SSP_SDRESP3 (ssp_is_old() ? 0x0b0 : 0x0d0)
-#define HW_SSP_STATUS (ssp_is_old() ? 0x0c0 : 0x100)
+#define HW_SSP_SDRESP0(h) (ssp_is_old(h) ? 0x080 : 0x0a0)
+#define HW_SSP_SDRESP1(h) (ssp_is_old(h) ? 0x090 : 0x0b0)
+#define HW_SSP_SDRESP2(h) (ssp_is_old(h) ? 0x0a0 : 0x0c0)
+#define HW_SSP_SDRESP3(h) (ssp_is_old(h) ? 0x0b0 : 0x0d0)
+#define HW_SSP_STATUS(h) (ssp_is_old(h) ? 0x0c0 : 0x100)
#define BM_SSP_STATUS_CARD_DETECT (1 << 28)
#define BM_SSP_STATUS_SDIO_IRQ (1 << 17)
-#define HW_SSP_VERSION (cpu_is_mx23() ? 0x110 : 0x130)
-#define BP_SSP_VERSION_MAJOR (24)
#define BF_SSP(value, field) (((value) << BP_SSP_##field) & BM_SSP_##field)
@@ -138,6 +137,11 @@
#define SSP_PIO_NUM 3
+enum mxs_mmc_id {
+ IMX23_MMC,
+ IMX28_MMC,
+};
+
struct mxs_mmc_host {
struct mmc_host *mmc;
struct mmc_request *mrq;
@@ -145,9 +149,7 @@ struct mxs_mmc_host {
struct mmc_data *data;
void __iomem *base;
- int irq;
- struct resource *res;
- struct resource *dma_res;
+ int dma_channel;
struct clk *clk;
unsigned int clk_rate;
@@ -157,32 +159,28 @@ struct mxs_mmc_host {
enum dma_transfer_direction slave_dirn;
u32 ssp_pio_words[SSP_PIO_NUM];
- unsigned int version;
+ enum mxs_mmc_id devid;
unsigned char bus_width;
spinlock_t lock;
int sdio_irq_en;
+ int wp_gpio;
};
static int mxs_mmc_get_ro(struct mmc_host *mmc)
{
struct mxs_mmc_host *host = mmc_priv(mmc);
- struct mxs_mmc_platform_data *pdata =
- mmc_dev(host->mmc)->platform_data;
-
- if (!pdata)
- return -EFAULT;
- if (!gpio_is_valid(pdata->wp_gpio))
+ if (!gpio_is_valid(host->wp_gpio))
return -EINVAL;
- return gpio_get_value(pdata->wp_gpio);
+ return gpio_get_value(host->wp_gpio);
}
static int mxs_mmc_get_cd(struct mmc_host *mmc)
{
struct mxs_mmc_host *host = mmc_priv(mmc);
- return !(readl(host->base + HW_SSP_STATUS) &
+ return !(readl(host->base + HW_SSP_STATUS(host)) &
BM_SSP_STATUS_CARD_DETECT);
}
@@ -190,7 +188,7 @@ static void mxs_mmc_reset(struct mxs_mmc_host *host)
{
u32 ctrl0, ctrl1;
- mxs_reset_block(host->base);
+ stmp_reset_block(host->base);
ctrl0 = BM_SSP_CTRL0_IGNORE_CRC;
ctrl1 = BF_SSP(0x3, CTRL1_SSP_MODE) |
@@ -206,7 +204,7 @@ static void mxs_mmc_reset(struct mxs_mmc_host *host)
writel(BF_SSP(0xffff, TIMING_TIMEOUT) |
BF_SSP(2, TIMING_CLOCK_DIVIDE) |
BF_SSP(0, TIMING_CLOCK_RATE),
- host->base + HW_SSP_TIMING);
+ host->base + HW_SSP_TIMING(host));
if (host->sdio_irq_en) {
ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
@@ -214,7 +212,7 @@ static void mxs_mmc_reset(struct mxs_mmc_host *host)
}
writel(ctrl0, host->base + HW_SSP_CTRL0);
- writel(ctrl1, host->base + HW_SSP_CTRL1);
+ writel(ctrl1, host->base + HW_SSP_CTRL1(host));
}
static void mxs_mmc_start_cmd(struct mxs_mmc_host *host,
@@ -228,12 +226,12 @@ static void mxs_mmc_request_done(struct mxs_mmc_host *host)
if (mmc_resp_type(cmd) & MMC_RSP_PRESENT) {
if (mmc_resp_type(cmd) & MMC_RSP_136) {
- cmd->resp[3] = readl(host->base + HW_SSP_SDRESP0);
- cmd->resp[2] = readl(host->base + HW_SSP_SDRESP1);
- cmd->resp[1] = readl(host->base + HW_SSP_SDRESP2);
- cmd->resp[0] = readl(host->base + HW_SSP_SDRESP3);
+ cmd->resp[3] = readl(host->base + HW_SSP_SDRESP0(host));
+ cmd->resp[2] = readl(host->base + HW_SSP_SDRESP1(host));
+ cmd->resp[1] = readl(host->base + HW_SSP_SDRESP2(host));
+ cmd->resp[0] = readl(host->base + HW_SSP_SDRESP3(host));
} else {
- cmd->resp[0] = readl(host->base + HW_SSP_SDRESP0);
+ cmd->resp[0] = readl(host->base + HW_SSP_SDRESP0(host));
}
}
@@ -276,9 +274,9 @@ static irqreturn_t mxs_mmc_irq_handler(int irq, void *dev_id)
spin_lock(&host->lock);
- stat = readl(host->base + HW_SSP_CTRL1);
+ stat = readl(host->base + HW_SSP_CTRL1(host));
writel(stat & MXS_MMC_IRQ_BITS,
- host->base + HW_SSP_CTRL1 + MXS_CLR_ADDR);
+ host->base + HW_SSP_CTRL1(host) + STMP_OFFSET_REG_CLR);
if ((stat & BM_SSP_CTRL1_SDIO_IRQ) && (stat & BM_SSP_CTRL1_SDIO_IRQ_EN))
mmc_signal_sdio_irq(host->mmc);
@@ -484,7 +482,7 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
blocks = 1;
/* xfer count, block size and count need to be set differently */
- if (ssp_is_old()) {
+ if (ssp_is_old(host)) {
ctrl0 |= BF_SSP(data_size, CTRL0_XFER_COUNT);
cmd0 |= BF_SSP(log2_blksz, CMD0_BLOCK_SIZE) |
BF_SSP(blocks - 1, CMD0_BLOCK_COUNT);
@@ -508,10 +506,10 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
/* set the timeout count */
timeout = mxs_ns_to_ssp_ticks(host->clk_rate, data->timeout_ns);
- val = readl(host->base + HW_SSP_TIMING);
+ val = readl(host->base + HW_SSP_TIMING(host));
val &= ~(BM_SSP_TIMING_TIMEOUT);
val |= BF_SSP(timeout, TIMING_TIMEOUT);
- writel(val, host->base + HW_SSP_TIMING);
+ writel(val, host->base + HW_SSP_TIMING(host));
/* pio */
host->ssp_pio_words[0] = ctrl0;
@@ -597,11 +595,11 @@ static void mxs_mmc_set_clk_rate(struct mxs_mmc_host *host, unsigned int rate)
ssp_sck = ssp_clk / clock_divide / (1 + clock_rate);
- val = readl(host->base + HW_SSP_TIMING);
+ val = readl(host->base + HW_SSP_TIMING(host));
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, host->base + HW_SSP_TIMING);
+ writel(val, host->base + HW_SSP_TIMING(host));
host->clk_rate = ssp_sck;
@@ -636,18 +634,19 @@ static void mxs_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
if (enable) {
writel(BM_SSP_CTRL0_SDIO_IRQ_CHECK,
- host->base + HW_SSP_CTRL0 + MXS_SET_ADDR);
+ host->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_SET);
writel(BM_SSP_CTRL1_SDIO_IRQ_EN,
- host->base + HW_SSP_CTRL1 + MXS_SET_ADDR);
+ host->base + HW_SSP_CTRL1(host) + STMP_OFFSET_REG_SET);
- if (readl(host->base + HW_SSP_STATUS) & BM_SSP_STATUS_SDIO_IRQ)
+ if (readl(host->base + HW_SSP_STATUS(host)) &
+ BM_SSP_STATUS_SDIO_IRQ)
mmc_signal_sdio_irq(host->mmc);
} else {
writel(BM_SSP_CTRL0_SDIO_IRQ_CHECK,
- host->base + HW_SSP_CTRL0 + MXS_CLR_ADDR);
+ host->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_CLR);
writel(BM_SSP_CTRL1_SDIO_IRQ_EN,
- host->base + HW_SSP_CTRL1 + MXS_CLR_ADDR);
+ host->base + HW_SSP_CTRL1(host) + STMP_OFFSET_REG_CLR);
}
spin_unlock_irqrestore(&host->lock, flags);
@@ -668,7 +667,7 @@ static bool mxs_mmc_dma_filter(struct dma_chan *chan, void *param)
if (!mxs_dma_is_apbh(chan))
return false;
- if (chan->chan_id != host->dma_res->start)
+ if (chan->chan_id != host->dma_channel)
return false;
chan->private = &host->dma_data;
@@ -676,12 +675,36 @@ static bool mxs_mmc_dma_filter(struct dma_chan *chan, void *param)
return true;
}
+static struct platform_device_id mxs_mmc_ids[] = {
+ {
+ .name = "imx23-mmc",
+ .driver_data = IMX23_MMC,
+ }, {
+ .name = "imx28-mmc",
+ .driver_data = IMX28_MMC,
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(platform, mxs_mmc_ids);
+
+static const struct of_device_id mxs_mmc_dt_ids[] = {
+ { .compatible = "fsl,imx23-mmc", .data = (void *) IMX23_MMC, },
+ { .compatible = "fsl,imx28-mmc", .data = (void *) IMX28_MMC, },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mxs_mmc_dt_ids);
+
static int mxs_mmc_probe(struct platform_device *pdev)
{
+ const struct of_device_id *of_id =
+ of_match_device(mxs_mmc_dt_ids, &pdev->dev);
+ struct device_node *np = pdev->dev.of_node;
struct mxs_mmc_host *host;
struct mmc_host *mmc;
- struct resource *iores, *dmares, *r;
+ struct resource *iores, *dmares;
struct mxs_mmc_platform_data *pdata;
+ struct pinctrl *pinctrl;
int ret = 0, irq_err, irq_dma;
dma_cap_mask_t mask;
@@ -689,40 +712,51 @@ static int mxs_mmc_probe(struct platform_device *pdev)
dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
irq_err = platform_get_irq(pdev, 0);
irq_dma = platform_get_irq(pdev, 1);
- if (!iores || !dmares || irq_err < 0 || irq_dma < 0)
+ if (!iores || irq_err < 0 || irq_dma < 0)
return -EINVAL;
- r = request_mem_region(iores->start, resource_size(iores), pdev->name);
- if (!r)
- return -EBUSY;
-
mmc = mmc_alloc_host(sizeof(struct mxs_mmc_host), &pdev->dev);
- if (!mmc) {
- ret = -ENOMEM;
- goto out_release_mem;
- }
+ if (!mmc)
+ return -ENOMEM;
host = mmc_priv(mmc);
- host->base = ioremap(r->start, resource_size(r));
+ host->base = devm_request_and_ioremap(&pdev->dev, iores);
if (!host->base) {
- ret = -ENOMEM;
+ ret = -EADDRNOTAVAIL;
goto out_mmc_free;
}
- /* only major verion does matter */
- host->version = readl(host->base + HW_SSP_VERSION) >>
- BP_SSP_VERSION_MAJOR;
+ if (np) {
+ host->devid = (enum mxs_mmc_id) of_id->data;
+ /*
+ * TODO: This is a temporary solution and should be changed
+ * to use generic DMA binding later when the helpers get in.
+ */
+ ret = of_property_read_u32(np, "fsl,ssp-dma-channel",
+ &host->dma_channel);
+ if (ret) {
+ dev_err(mmc_dev(host->mmc),
+ "failed to get dma channel\n");
+ goto out_mmc_free;
+ }
+ } else {
+ host->devid = pdev->id_entry->driver_data;
+ host->dma_channel = dmares->start;
+ }
host->mmc = mmc;
- host->res = r;
- host->dma_res = dmares;
- host->irq = irq_err;
host->sdio_irq_en = 0;
+ pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+ if (IS_ERR(pinctrl)) {
+ ret = PTR_ERR(pinctrl);
+ goto out_mmc_free;
+ }
+
host->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(host->clk)) {
ret = PTR_ERR(host->clk);
- goto out_iounmap;
+ goto out_mmc_free;
}
clk_prepare_enable(host->clk);
@@ -744,11 +778,20 @@ static int mxs_mmc_probe(struct platform_device *pdev)
MMC_CAP_SDIO_IRQ | MMC_CAP_NEEDS_POLL;
pdata = mmc_dev(host->mmc)->platform_data;
- if (pdata) {
+ if (!pdata) {
+ u32 bus_width = 0;
+ of_property_read_u32(np, "bus-width", &bus_width);
+ if (bus_width == 4)
+ mmc->caps |= MMC_CAP_4_BIT_DATA;
+ else if (bus_width == 8)
+ mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;
+ host->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
+ } else {
if (pdata->flags & SLOTF_8_BIT_CAPABLE)
mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;
if (pdata->flags & SLOTF_4_BIT_CAPABLE)
mmc->caps |= MMC_CAP_4_BIT_DATA;
+ host->wp_gpio = pdata->wp_gpio;
}
mmc->f_min = 400000;
@@ -757,13 +800,14 @@ static int mxs_mmc_probe(struct platform_device *pdev)
mmc->max_segs = 52;
mmc->max_blk_size = 1 << 0xf;
- mmc->max_blk_count = (ssp_is_old()) ? 0xff : 0xffffff;
- mmc->max_req_size = (ssp_is_old()) ? 0xffff : 0xffffffff;
+ mmc->max_blk_count = (ssp_is_old(host)) ? 0xff : 0xffffff;
+ mmc->max_req_size = (ssp_is_old(host)) ? 0xffff : 0xffffffff;
mmc->max_seg_size = dma_get_max_seg_size(host->dmach->device->dev);
platform_set_drvdata(pdev, mmc);
- ret = request_irq(host->irq, mxs_mmc_irq_handler, 0, DRIVER_NAME, host);
+ ret = devm_request_irq(&pdev->dev, irq_err, mxs_mmc_irq_handler, 0,
+ DRIVER_NAME, host);
if (ret)
goto out_free_dma;
@@ -771,26 +815,20 @@ static int mxs_mmc_probe(struct platform_device *pdev)
ret = mmc_add_host(mmc);
if (ret)
- goto out_free_irq;
+ goto out_free_dma;
dev_info(mmc_dev(host->mmc), "initialized\n");
return 0;
-out_free_irq:
- free_irq(host->irq, host);
out_free_dma:
if (host->dmach)
dma_release_channel(host->dmach);
out_clk_put:
clk_disable_unprepare(host->clk);
clk_put(host->clk);
-out_iounmap:
- iounmap(host->base);
out_mmc_free:
mmc_free_host(mmc);
-out_release_mem:
- release_mem_region(iores->start, resource_size(iores));
return ret;
}
@@ -798,12 +836,9 @@ static int mxs_mmc_remove(struct platform_device *pdev)
{
struct mmc_host *mmc = platform_get_drvdata(pdev);
struct mxs_mmc_host *host = mmc_priv(mmc);
- struct resource *res = host->res;
mmc_remove_host(mmc);
- free_irq(host->irq, host);
-
platform_set_drvdata(pdev, NULL);
if (host->dmach)
@@ -812,12 +847,8 @@ static int mxs_mmc_remove(struct platform_device *pdev)
clk_disable_unprepare(host->clk);
clk_put(host->clk);
- iounmap(host->base);
-
mmc_free_host(mmc);
- release_mem_region(res->start, resource_size(res));
-
return 0;
}
@@ -857,11 +888,13 @@ static const struct dev_pm_ops mxs_mmc_pm_ops = {
static struct platform_driver mxs_mmc_driver = {
.probe = mxs_mmc_probe,
.remove = mxs_mmc_remove,
+ .id_table = mxs_mmc_ids,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
#ifdef CONFIG_PM
.pm = &mxs_mmc_pm_ops,
+ .of_match_table = mxs_mmc_dt_ids,
#endif
},
};
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 8abdaf6697a8..d190d04636a7 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -24,6 +24,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
+#include <linux/pinctrl/consumer.h>
#include <mach/esdhc.h>
#include "sdhci-pltfm.h"
#include "sdhci-esdhc.h"
@@ -68,6 +69,7 @@ struct pltfm_imx_data {
int flags;
u32 scratchpad;
enum imx_esdhc_type devtype;
+ struct pinctrl *pinctrl;
struct esdhc_platform_data boarddata;
};
@@ -467,6 +469,12 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
clk_prepare_enable(clk);
pltfm_host->clk = clk;
+ imx_data->pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+ if (IS_ERR(imx_data->pinctrl)) {
+ err = PTR_ERR(imx_data->pinctrl);
+ goto pin_err;
+ }
+
host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
if (is_imx25_esdhc(imx_data) || is_imx35_esdhc(imx_data))
@@ -558,6 +566,7 @@ no_card_detect_irq:
gpio_free(boarddata->wp_gpio);
no_card_detect_pin:
no_board_data:
+pin_err:
clk_disable_unprepare(pltfm_host->clk);
clk_put(pltfm_host->clk);
err_clk_get: