@@ -20,6 +20,7 @@
#define PDM_DMA_BURST_SIZE (8) /* size * width: 8*4 = 32 bytes */
#define PDM_SIGNOFF_CLK_RATE (100000000)
+#define PDM_PATH_MAX (4)
enum rk_pdm_version {
RK_PDM_RK3229,
@@ -539,8 +540,36 @@ static const struct of_device_id rockchip_pdm_match[] __maybe_unused = {
};
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)
{
+ struct device_node *node = pdev->dev.of_node;
const struct of_device_id *match;
struct rk_pdm_dev *pdm;
struct resource *res;
@@ -606,6 +635,11 @@ static int rockchip_pdm_probe(struct platform_device *pdev)
}
rockchip_pdm_rxctrl(pdm, 0);
+
+ ret = rockchip_pdm_path_parse(pdm, node);
+ if (ret != 0 && ret != -ENOENT)
+ goto err_suspend;
+
ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
if (ret) {
dev_err(&pdev->dev, "could not register pcm: %d\n", ret);
@@ -53,6 +53,9 @@
#define PDM_FD_DENOMINATOR_MSK GENMASK(15, 0)
/* 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_40 (0X0 << 6)
#define PDM_CLK_FD_RATIO_35 BIT(6)
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 Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com> --- sound/soc/rockchip/rockchip_pdm.c | 34 ++++++++++++++++++++++++++++++++++ sound/soc/rockchip/rockchip_pdm.h | 3 +++ 2 files changed, 37 insertions(+)