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-rw-r--r--drivers/clk/clk-si5341.c69
1 files changed, 64 insertions, 5 deletions
diff --git a/drivers/clk/clk-si5341.c b/drivers/clk/clk-si5341.c
index 3c228b018116..3d7acab9d280 100644
--- a/drivers/clk/clk-si5341.c
+++ b/drivers/clk/clk-si5341.c
@@ -1,8 +1,14 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Driver for Silicon Labs Si5341/Si5340 Clock generator
+ * Driver for Silicon Labs Si5340, Si5341, Si5342, Si5344 and Si5345
* Copyright (C) 2019 Topic Embedded Products
* Author: Mike Looijmans <mike.looijmans@topic.nl>
+ *
+ * The Si5341 has 10 outputs and 5 synthesizers.
+ * The Si5340 is a smaller version of the Si5341 with only 4 outputs.
+ * The Si5345 is similar to the Si5341, with the addition of fractional input
+ * dividers and automatic input selection.
+ * The Si5342 and Si5344 are smaller versions of the Si5345.
*/
#include <linux/clk.h>
@@ -18,11 +24,17 @@
#define SI5341_NUM_INPUTS 4
-#define SI5341_MAX_NUM_OUTPUTS 10
#define SI5340_MAX_NUM_OUTPUTS 4
+#define SI5341_MAX_NUM_OUTPUTS 10
+#define SI5342_MAX_NUM_OUTPUTS 2
+#define SI5344_MAX_NUM_OUTPUTS 4
+#define SI5345_MAX_NUM_OUTPUTS 10
-#define SI5341_NUM_SYNTH 5
#define SI5340_NUM_SYNTH 4
+#define SI5341_NUM_SYNTH 5
+#define SI5342_NUM_SYNTH 2
+#define SI5344_NUM_SYNTH 4
+#define SI5345_NUM_SYNTH 5
/* Range of the synthesizer fractional divider */
#define SI5341_SYNTH_N_MIN 10
@@ -65,6 +77,7 @@ struct clk_si5341 {
u64 freq_vco; /* 13500–14256 MHz */
u8 num_outputs;
u8 num_synth;
+ u16 chip_id;
};
#define to_clk_si5341(_hw) container_of(_hw, struct clk_si5341, hw)
@@ -142,6 +155,7 @@ static const char * const si5341_input_clock_names[] = {
};
/* Output configuration registers 0..9 are not quite logically organized */
+/* Also for si5345 */
static const u16 si5341_reg_output_offset[] = {
0x0108,
0x010D,
@@ -155,6 +169,7 @@ static const u16 si5341_reg_output_offset[] = {
0x013A,
};
+/* for si5340, si5342 and si5344 */
static const u16 si5340_reg_output_offset[] = {
0x0112,
0x0117,
@@ -974,12 +989,32 @@ static int si5341_probe_chip_id(struct clk_si5341 *data)
data->reg_output_offset = si5341_reg_output_offset;
data->reg_rdiv_offset = si5341_reg_rdiv_offset;
break;
+ case 0x5342:
+ data->num_outputs = SI5342_MAX_NUM_OUTPUTS;
+ data->num_synth = SI5342_NUM_SYNTH;
+ data->reg_output_offset = si5340_reg_output_offset;
+ data->reg_rdiv_offset = si5340_reg_rdiv_offset;
+ break;
+ case 0x5344:
+ data->num_outputs = SI5344_MAX_NUM_OUTPUTS;
+ data->num_synth = SI5344_NUM_SYNTH;
+ data->reg_output_offset = si5340_reg_output_offset;
+ data->reg_rdiv_offset = si5340_reg_rdiv_offset;
+ break;
+ case 0x5345:
+ data->num_outputs = SI5345_MAX_NUM_OUTPUTS;
+ data->num_synth = SI5345_NUM_SYNTH;
+ data->reg_output_offset = si5341_reg_output_offset;
+ data->reg_rdiv_offset = si5341_reg_rdiv_offset;
+ break;
default:
dev_err(&data->i2c_client->dev, "Model '%x' not supported\n",
model);
return -EINVAL;
}
+ data->chip_id = model;
+
return 0;
}
@@ -1054,6 +1089,11 @@ static const struct si5341_reg_default si5341_preamble[] = {
{ 0x0B4E, 0x1A },
};
+static const struct si5341_reg_default si5345_preamble[] = {
+ { 0x0B25, 0x00 },
+ { 0x0540, 0x01 },
+};
+
static int si5341_send_preamble(struct clk_si5341 *data)
{
int res;
@@ -1068,8 +1108,14 @@ static int si5341_send_preamble(struct clk_si5341 *data)
res = regmap_write(data->regmap, 0xB24, revision < 2 ? 0xD8 : 0xC0);
if (res < 0)
return res;
- res = si5341_write_multiple(data,
- si5341_preamble, ARRAY_SIZE(si5341_preamble));
+
+ /* The si5342..si5345 require a different preamble */
+ if (data->chip_id > 0x5341)
+ res = si5341_write_multiple(data,
+ si5345_preamble, ARRAY_SIZE(si5345_preamble));
+ else
+ res = si5341_write_multiple(data,
+ si5341_preamble, ARRAY_SIZE(si5341_preamble));
if (res < 0)
return res;
@@ -1095,6 +1141,13 @@ static int si5341_finalize_defaults(struct clk_si5341 *data)
if (res < 0)
return res;
+ /* The si5342..si5345 have an additional post-amble */
+ if (data->chip_id > 0x5341) {
+ res = regmap_write(data->regmap, 0x540, 0x0);
+ if (res < 0)
+ return res;
+ }
+
/* Datasheet does not explain these nameless registers */
res = regmap_write(data->regmap, 0xB24, revision < 2 ? 0xDB : 0xC3);
if (res < 0)
@@ -1499,6 +1552,9 @@ static int si5341_probe(struct i2c_client *client,
static const struct i2c_device_id si5341_id[] = {
{ "si5340", 0 },
{ "si5341", 1 },
+ { "si5342", 2 },
+ { "si5344", 4 },
+ { "si5345", 5 },
{ }
};
MODULE_DEVICE_TABLE(i2c, si5341_id);
@@ -1506,6 +1562,9 @@ MODULE_DEVICE_TABLE(i2c, si5341_id);
static const struct of_device_id clk_si5341_of_match[] = {
{ .compatible = "silabs,si5340" },
{ .compatible = "silabs,si5341" },
+ { .compatible = "silabs,si5342" },
+ { .compatible = "silabs,si5344" },
+ { .compatible = "silabs,si5345" },
{ }
};
MODULE_DEVICE_TABLE(of, clk_si5341_of_match);