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authorSonic Zhang <sonic.zhang@analog.com>2014-07-23 06:57:16 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-07-26 17:15:16 -0300
commit0a6824bc10de58dac8beca4ad6744753f1cf9a6f (patch)
tree6e8dd0af3ed69dfcfaf2ec2431fa4c6ccc9f0cb0 /drivers/media
parent7ba3c21c17d0fec397dc5e0337a3548eb14220bd (diff)
[media] v4l2: blackfin: select proper pinctrl state in ppi_set_params if CONFIG_PINCTRL is enabled
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>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/platform/blackfin/ppi.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/media/platform/blackfin/ppi.c b/drivers/media/platform/blackfin/ppi.c
index 90c4a936e3ae..cff63e511e6d 100644
--- a/drivers/media/platform/blackfin/ppi.c
+++ b/drivers/media/platform/blackfin/ppi.c
@@ -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;