shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

ASoC: rockchip: pdm: Add support for path map

Browse Source 
This patch adds property 'rockchip,path-map' for path mapping.

e.g.

"rockchip,path-map = <3 2 1 0>" means the mapping as follows:

  path0 <-- sdi3
  path1 <-- sdi2
  path2 <-- sdi1
  path3 <-- sdi0

Change-Id: Ief7ef83cbcf8c57ee9dc07e49d70ea7e5da9e5cc
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
This commit is contained in:
Sugar Zhang
2021-01-04 15:17:09 +08:00
parent 3a294df494
commit 93773ea1ee
2 changed files with 36 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
sound/soc/rockchip/rockchip_pdm.c
View File

@@ -29,6 +29,7 @@
#define PDM_DMA_BURST_SIZE (8) /* size * width: 8*4 = 32 bytes */ #define PDM_DMA_BURST_SIZE (8) /* size * width: 8*4 = 32 bytes */
#define PDM_SIGNOFF_CLK_RATE (100000000) #define PDM_SIGNOFF_CLK_RATE (100000000)
#define PDM_PATH_MAX (4)
enum rk_pdm_version { enum rk_pdm_version {
RK_PDM_RK3229, RK_PDM_RK3229,
@@ -548,6 +549,33 @@ static const struct of_device_id rockchip_pdm_match[] = {
}; };
MODULE_DEVICE_TABLE(of, rockchip_pdm_match); MODULE_DEVICE_TABLE(of, rockchip_pdm_match);
static int rockchip_pdm_path_parse(struct rk_pdm_dev *pdm, struct device_node *node)
{
unsigned int path[PDM_PATH_MAX];
int cnt = 0, ret = 0, i = 0, val = 0, msk = 0;
cnt = of_count_phandle_with_args(node, "rockchip,path-map",
NULL);
if (cnt != PDM_PATH_MAX)
return cnt;
ret = of_property_read_u32_array(node, "rockchip,path-map",
path, cnt);
if (ret)
return ret;
for (i = 0; i < cnt; i++) {
if (path[i] >= PDM_PATH_MAX)
return -EINVAL;
msk |= PDM_PATH_MASK(i);
val |= PDM_PATH(i, path[i]);
}
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, msk, val);
return 0;
}
static int rockchip_pdm_probe(struct platform_device *pdev) static int rockchip_pdm_probe(struct platform_device *pdev)
{ {
struct device_node *node = pdev->dev.of_node; struct device_node *node = pdev->dev.of_node;
@@ -617,6 +645,11 @@ static int rockchip_pdm_probe(struct platform_device *pdev)
} }
rockchip_pdm_rxctrl(pdm, 0); rockchip_pdm_rxctrl(pdm, 0);
ret = rockchip_pdm_path_parse(pdm, node);
if (ret != -ENOENT)
goto err_suspend;
if (of_property_read_bool(node, "rockchip,no-dmaengine")) if (of_property_read_bool(node, "rockchip,no-dmaengine"))
return ret; return ret;
ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0); ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);

3
sound/soc/rockchip/rockchip_pdm.h
View File

@@ -62,6 +62,9 @@
#define PDM_FD_DENOMINATOR_MSK GENMASK(15, 0) #define PDM_FD_DENOMINATOR_MSK GENMASK(15, 0)
/* PDM CLK CTRL */ /* PDM CLK CTRL */
#define PDM_PATH_SHIFT(x) (8 + (x) * 2)
#define PDM_PATH_MASK(x) (0x3 << PDM_PATH_SHIFT(x))
#define PDM_PATH(x, v) ((v) << PDM_PATH_SHIFT(x))
#define PDM_CLK_FD_RATIO_MSK BIT(6) #define PDM_CLK_FD_RATIO_MSK BIT(6)
#define PDM_CLK_FD_RATIO_40 (0X0 << 6) #define PDM_CLK_FD_RATIO_40 (0X0 << 6)
#define PDM_CLK_FD_RATIO_35 BIT(6) #define PDM_CLK_FD_RATIO_35 BIT(6)