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[media] v4l2: blackfin: select proper pinctrl state in ppi_set_params if CONFIG_PINCTRL is enabled

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Multiple pinctrl states are defined for 8, 16 and 24 data pin groups in PPI peripheral.
The driver should select correct group before set up further PPI parameters.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Scott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Sonic Zhang 2014-07-23 06:57:16 -03:00 committed by Mauro Carvalho Chehab
parent 7ba3c21c17
commit 0a6824bc10
2 changed files with 18 additions and 0 deletions
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17
drivers/media/platform/blackfin/ppi.c
View File

@ -206,6 +206,20 @@ static int ppi_set_params(struct ppi_if *ppi, struct ppi_params *params)
int dma_config, bytes_per_line;
int hcount, hdelay, samples_per_line;
#ifdef CONFIG_PINCTRL
static const char * const pin_state[] = {"8bit", "16bit", "24bit"};
struct pinctrl *pctrl;
struct pinctrl_state *pstate;
if (params->dlen > 24 || params->dlen <= 0)
return -EINVAL;
pctrl = devm_pinctrl_get(ppi->dev);
pstate = pinctrl_lookup_state(pctrl,
pin_state[(params->dlen + 7) / 8 - 1]);
if (pinctrl_select_state(pctrl, pstate))
return -EINVAL;
#endif
bytes_per_line = params->width * params->bpp / 8;
/* convert parameters unit from pixels to samples */
hcount = params->width * params->bpp / params->dlen;
@ -316,10 +330,12 @@ struct ppi_if *ppi_create_instance(struct platform_device *pdev,
if (!info || !info->pin_req)
return NULL;
#ifndef CONFIG_PINCTRL
if (peripheral_request_list(info->pin_req, KBUILD_MODNAME)) {
dev_err(&pdev->dev, "request peripheral failed\n");
return NULL;
}
#endif
ppi = kzalloc(sizeof(*ppi), GFP_KERNEL);
if (!ppi) {
@ -329,6 +345,7 @@ struct ppi_if *ppi_create_instance(struct platform_device *pdev,
}
ppi->ops = &ppi_ops;
ppi->info = info;
ppi->dev = &pdev->dev;
pr_info("ppi probe success\n");
return ppi;

1
include/media/blackfin/ppi.h
View File

@ -83,6 +83,7 @@ struct ppi_info {
};
struct ppi_if {
struct device *dev;
unsigned long ppi_control;
const struct ppi_ops *ops;
const struct ppi_info *info;