Tegra210 has 3 DMIC inputs which can be clocked from the recovered clock
of several other audio inputs (eg. i2s0, i2s1, ...). To model this, we add
a 3 new clocks similar to the audio* clocks which handle the same function
for the i2s and spdif clocks.
Signed-off-by: Peter De Schrijver <pdeschrijver@xxxxxxxxxx>
---
drivers/clk/tegra/clk-id.h | 6 +++
drivers/clk/tegra/clk-tegra-audio.c | 85 +++++++++++++++++++++++---------
drivers/clk/tegra/clk-tegra210.c | 6 +++
include/dt-bindings/clock/tegra210-car.h | 9 +++-
4 files changed, 81 insertions(+), 25 deletions(-)
diff --git a/drivers/clk/tegra/clk-id.h b/drivers/clk/tegra/clk-id.h
index fc978b2..b40293c 100644
--- a/drivers/clk/tegra/clk-id.h
+++ b/drivers/clk/tegra/clk-id.h
@@ -309,6 +309,12 @@ enum clk_id {
tegra_clk_sor_safe,
tegra_clk_ispa,
tegra_clk_cec,
+ tegra_clk_dmic1_sync_clk,
+ tegra_clk_dmic2_sync_clk,
+ tegra_clk_dmic3_sync_clk,
+ tegra_clk_dmic1_sync_clk_mux,
+ tegra_clk_dmic2_sync_clk_mux,
+ tegra_clk_dmic3_sync_clk_mux,
tegra_clk_max,
};
diff --git a/drivers/clk/tegra/clk-tegra-audio.c b/drivers/clk/tegra/clk-tegra-audio.c
index e2bfa9b..b37cae7 100644
--- a/drivers/clk/tegra/clk-tegra-audio.c
+++ b/drivers/clk/tegra/clk-tegra-audio.c
@@ -31,6 +31,9 @@
#define AUDIO_SYNC_CLK_I2S3 0x4ac
#define AUDIO_SYNC_CLK_I2S4 0x4b0
#define AUDIO_SYNC_CLK_SPDIF 0x4b4
+#define AUDIO_SYNC_CLK_DMIC1 0x560
+#define AUDIO_SYNC_CLK_DMIC2 0x564
+#define AUDIO_SYNC_CLK_DMIC3 0x6b8
#define AUDIO_SYNC_DOUBLER 0x49c
@@ -91,8 +94,14 @@ struct tegra_audio2x_clk_initdata {
static DEFINE_SPINLOCK(clk_doubler_lock);
-static const char *mux_audio_sync_clk[] = { "spdif_in_sync", "i2s0_sync",
- "i2s1_sync", "i2s2_sync", "i2s3_sync", "i2s4_sync", "vimclk_sync",
+static const char * const mux_audio_sync_clk[] = { "spdif_in_sync",
+ "i2s0_sync", "i2s1_sync", "i2s2_sync", "i2s3_sync", "i2s4_sync",
+ "pll_a_out0", "vimclk_sync",
+};
+
+static const char * const mux_dmic_sync_clk[] = { "unused", "i2s0_sync",
+ "i2s1_sync", "i2s2_sync", "i2s3_sync", "i2s4_sync", "pll_a_out0",
+ "vimclk_sync",
};
static struct tegra_sync_source_initdata sync_source_clks[] __initdata = {
@@ -114,6 +123,12 @@ struct tegra_audio2x_clk_initdata {
AUDIO(spdif, AUDIO_SYNC_CLK_SPDIF),
};
+static struct tegra_audio_clk_initdata dmic_clks[] = {
+ AUDIO(dmic1_sync_clk, AUDIO_SYNC_CLK_DMIC1),
+ AUDIO(dmic2_sync_clk, AUDIO_SYNC_CLK_DMIC2),
+ AUDIO(dmic3_sync_clk, AUDIO_SYNC_CLK_DMIC3),
+};
+
static struct tegra_audio2x_clk_initdata audio2x_clks[] = {
AUDIO2X(audio0, 113, 24),
AUDIO2X(audio1, 114, 25),
@@ -123,6 +138,41 @@ struct tegra_audio2x_clk_initdata {
AUDIO2X(spdif, 118, 29),
};
+static void __init tegra_audio_sync_clk_init(void __iomem *clk_base,
+ struct tegra_clk *tegra_clks,
+ struct tegra_audio_clk_initdata *sync,
+ int num_sync_clks,
+ const char * const *mux_names,
+ int num_mux_inputs)
+{
+ struct clk *clk;
+ struct clk **dt_clk;
+ struct tegra_audio_clk_initdata *data;
+ int i;
+
+ for (i = 0, data = sync; i < num_sync_clks; i++, data++) {
+ dt_clk = tegra_lookup_dt_id(data->mux_clk_id, tegra_clks);
+ if (!dt_clk)
+ continue;
+
+ clk = clk_register_mux(NULL, data->mux_name, mux_names,
+ num_mux_inputs,
+ CLK_SET_RATE_NO_REPARENT,
+ clk_base + data->offset, 0, 3, 0,
+ NULL);
+ *dt_clk = clk;
+
+ dt_clk = tegra_lookup_dt_id(data->gate_clk_id, tegra_clks);
+ if (!dt_clk)
+ continue;
+
+ clk = clk_register_gate(NULL, data->gate_name, data->mux_name,
+ 0, clk_base + data->offset, 4,
+ CLK_GATE_SET_TO_DISABLE, NULL);
+ *dt_clk = clk;
+ }
+}
+
void __init tegra_audio_clk_init(void __iomem *clk_base,
void __iomem *pmc_base, struct tegra_clk *tegra_clks,
struct tegra_audio_clk_info *audio_info,
@@ -176,30 +226,17 @@ void __init tegra_audio_clk_init(void __iomem *clk_base,
*dt_clk = clk;
}
- for (i = 0; i < ARRAY_SIZE(audio_clks); i++) {
- struct tegra_audio_clk_initdata *data;
+ tegra_audio_sync_clk_init(clk_base, tegra_clks, audio_clks,
+ ARRAY_SIZE(audio_clks), mux_audio_sync_clk,
+ ARRAY_SIZE(mux_audio_sync_clk));
- data = &audio_clks[i];
- dt_clk = tegra_lookup_dt_id(data->mux_clk_id, tegra_clks);
+ /* make sure the DMIC sync clocks have a valid parent */
+ for (i = 0; i < ARRAY_SIZE(dmic_clks); i++)
+ writel_relaxed(1, clk_base + dmic_clks[i].offset);
- if (!dt_clk)
- continue;
- clk = clk_register_mux(NULL, data->mux_name, mux_audio_sync_clk,
- ARRAY_SIZE(mux_audio_sync_clk),
- CLK_SET_RATE_NO_REPARENT,
- clk_base + data->offset, 0, 3, 0,
- NULL);
- *dt_clk = clk;
-
- dt_clk = tegra_lookup_dt_id(data->gate_clk_id, tegra_clks);
- if (!dt_clk)
- continue;
-
- clk = clk_register_gate(NULL, data->gate_name, data->mux_name,
- 0, clk_base + data->offset, 4,
- CLK_GATE_SET_TO_DISABLE, NULL);
- *dt_clk = clk;
- }
+ tegra_audio_sync_clk_init(clk_base, tegra_clks, dmic_clks,
+ ARRAY_SIZE(dmic_clks), mux_dmic_sync_clk,
+ ARRAY_SIZE(mux_dmic_sync_clk));
for (i = 0; i < ARRAY_SIZE(audio2x_clks); i++) {
struct tegra_audio2x_clk_initdata *data;
diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c
index bdb296a..ca63901 100644
--- a/drivers/clk/tegra/clk-tegra210.c
+++ b/drivers/clk/tegra/clk-tegra210.c
@@ -2223,6 +2223,12 @@ static u32 pll_expo_p_to_pdiv(u32 p, u32 *pdiv)
[tegra_clk_pll_a1] = { .dt_id = TEGRA210_CLK_PLL_A1, .present = true },
[tegra_clk_ispa] = { .dt_id = TEGRA210_CLK_ISPA, .present = true },
[tegra_clk_cec] = { .dt_id = TEGRA210_CLK_CEC, .present = true },
+ [tegra_clk_dmic1_sync_clk] = { .dt_id = TEGRA210_CLK_DMIC1_SYNC_CLK, .present = true },
+ [tegra_clk_dmic2_sync_clk] = { .dt_id = TEGRA210_CLK_DMIC2_SYNC_CLK, .present = true },
+ [tegra_clk_dmic3_sync_clk] = { .dt_id = TEGRA210_CLK_DMIC3_SYNC_CLK, .present = true },
+ [tegra_clk_dmic1_sync_clk_mux] = { .dt_id = TEGRA210_CLK_DMIC1_SYNC_CLK_MUX, .present = true },
+ [tegra_clk_dmic2_sync_clk_mux] = { .dt_id = TEGRA210_CLK_DMIC2_SYNC_CLK_MUX, .present = true },
+ [tegra_clk_dmic3_sync_clk_mux] = { .dt_id = TEGRA210_CLK_DMIC3_SYNC_CLK_MUX, .present = true },
};
static struct tegra_devclk devclks[] __initdata = {
diff --git a/include/dt-bindings/clock/tegra210-car.h b/include/dt-bindings/clock/tegra210-car.h
index e7a2578..5aa1027 100644
--- a/include/dt-bindings/clock/tegra210-car.h
+++ b/include/dt-bindings/clock/tegra210-car.h
@@ -396,6 +396,13 @@
#define TEGRA210_CLK_PLL_C_UD 364
#define TEGRA210_CLK_SCLK_MUX 365
-#define TEGRA210_CLK_CLK_MAX 366
+#define TEGRA210_CLK_DMIC1_SYNC_CLK 388
+#define TEGRA210_CLK_DMIC1_SYNC_CLK_MUX 389
+#define TEGRA210_CLK_DMIC2_SYNC_CLK 390
+#define TEGRA210_CLK_DMIC2_SYNC_CLK_MUX 391
+#define TEGRA210_CLK_DMIC3_SYNC_CLK 392
+#define TEGRA210_CLK_DMIC3_SYNC_CLK_MUX 393
+
+#define TEGRA210_CLK_CLK_MAX 394
#endif /* _DT_BINDINGS_CLOCK_TEGRA210_CAR_H */
--
1.9.1
--
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