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[media] atmel-isi: add code to enable/disable ISI_MCK clock 

This patch
- add ISI_MCK clock enable/disable code.
- change field name in isi_platform_data structure

Signed-off-by: Josh Wu <josh.wu@atmel.com>
[g.liakhovetski@gmx.de: fix label names]
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Josh Wu 2011-12-08 07:18:49 -03:00 committed by Mauro Carvalho Chehab
parent 48ecf9fe8f
commit d8ec0961ce
2 changed files with 32 additions and 3 deletions
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31
drivers/media/video/atmel-isi.c
View File

@ -90,7 +90,10 @@ struct atmel_isi {
struct isi_dma_desc dma_desc[MAX_BUFFER_NUM];
struct completion complete;
/* ISI peripherial clock */
struct clk *pclk;
/* ISI_MCK, feed to camera sensor to generate pixel clock */
struct clk *mck;
unsigned int irq;
struct isi_platform_data *pdata;
@ -766,6 +769,12 @@ static int isi_camera_add_device(struct soc_camera_device *icd)
if (ret)
return ret;
ret = clk_enable(isi->mck);
if (ret) {
clk_disable(isi->pclk);
return ret;
}
isi->icd = icd;
dev_dbg(icd->parent, "Atmel ISI Camera driver attached to camera %d\n",
icd->devnum);
@ -779,6 +788,7 @@ static void isi_camera_remove_device(struct soc_camera_device *icd)
BUG_ON(icd != isi->icd);
clk_disable(isi->mck);
clk_disable(isi->pclk);
isi->icd = NULL;
@ -874,7 +884,7 @@ static int isi_camera_set_bus_param(struct soc_camera_device *icd)
if (isi->pdata->has_emb_sync)
cfg1 |= ISI_CFG1_EMB_SYNC;
if (isi->pdata->isi_full_mode)
if (isi->pdata->full_mode)
cfg1 |= ISI_CFG1_FULL_MODE;
isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
@ -912,6 +922,7 @@ static int __devexit atmel_isi_remove(struct platform_device *pdev)
isi->fb_descriptors_phys);
iounmap(isi->regs);
clk_put(isi->mck);
clk_put(isi->pclk);
kfree(isi);
@ -930,7 +941,7 @@ static int __devinit atmel_isi_probe(struct platform_device *pdev)
struct isi_platform_data *pdata;
pdata = dev->platform_data;
if (!pdata || !pdata->data_width_flags) {
if (!pdata || !pdata->data_width_flags || !pdata->mck_hz) {
dev_err(&pdev->dev,
"No config available for Atmel ISI\n");
return -EINVAL;
@ -959,6 +970,19 @@ static int __devinit atmel_isi_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&isi->video_buffer_list);
INIT_LIST_HEAD(&isi->dma_desc_head);
/* Get ISI_MCK, provided by programmable clock or external clock */
isi->mck = clk_get(dev, "isi_mck");
if (IS_ERR(isi->mck)) {
dev_err(dev, "Failed to get isi_mck\n");
ret = PTR_ERR(isi->mck);
goto err_clk_get;
}
/* Set ISI_MCK's frequency, it should be faster than pixel clock */
ret = clk_set_rate(isi->mck, pdata->mck_hz);
if (ret < 0)
goto err_set_mck_rate;
isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
sizeof(struct fbd) * MAX_BUFFER_NUM,
&isi->fb_descriptors_phys,
@ -1034,6 +1058,9 @@ err_alloc_ctx:
isi->p_fb_descriptors,
isi->fb_descriptors_phys);
err_alloc_descriptors:
err_set_mck_rate:
clk_put(isi->mck);
err_clk_get:
kfree(isi);
err_alloc_isi:
clk_put(pclk);

4
include/media/atmel-isi.h
View File

@ -110,10 +110,12 @@ struct isi_platform_data {
u8 hsync_act_low;
u8 vsync_act_low;
u8 pclk_act_falling;
u8 isi_full_mode;
u8 full_mode;
u32 data_width_flags;
/* Using for ISI_CFG1 */
u32 frate;
/* Using for ISI_MCK */
u32 mck_hz;
};
#endif /* __ATMEL_ISI_H__ */