diff options
| -rw-r--r-- | Documentation/devicetree/bindings/clock/silabs,si5341.txt | 11 | ||||
| -rw-r--r-- | drivers/clk/clk-si5341.c | 69 |
2 files changed, 74 insertions, 6 deletions
diff --git a/Documentation/devicetree/bindings/clock/silabs,si5341.txt b/Documentation/devicetree/bindings/clock/silabs,si5341.txt index a70c333e4cd4..504cce3abe46 100644 --- a/Documentation/devicetree/bindings/clock/silabs,si5341.txt +++ b/Documentation/devicetree/bindings/clock/silabs,si5341.txt @@ -1,15 +1,21 @@ -Binding for Silicon Labs Si5341 and Si5340 programmable i2c clock generator. +Binding for Silicon Labs Si5340, Si5341 Si5342, Si5344 and Si5345 programmable +i2c clock generator. Reference [1] Si5341 Data Sheet https://www.silabs.com/documents/public/data-sheets/Si5341-40-D-DataSheet.pdf [2] Si5341 Reference Manual https://www.silabs.com/documents/public/reference-manuals/Si5341-40-D-RM.pdf +[3] Si5345 Reference Manual + https://www.silabs.com/documents/public/reference-manuals/Si5345-44-42-D-RM.pdf The Si5341 and Si5340 are programmable i2c clock generators with up to 10 output clocks. The chip contains a PLL that sources 5 (or 4) multisynth clocks, which in turn can be directed to any of the 10 (or 4) outputs through a divider. The internal structure of the clock generators can be found in [2]. +The Si5345 is similar to the Si5341 with the addition of fractional input +dividers and automatic input selection, as described in [3]. +The Si5342 and Si5344 are smaller versions of the Si5345, with 2 or 4 outputs. The driver can be used in "as is" mode, reading the current settings from the chip at boot, in case you have a (pre-)programmed device. If the PLL is not @@ -28,6 +34,9 @@ Required properties: - compatible: shall be one of the following: "silabs,si5340" - Si5340 A/B/C/D "silabs,si5341" - Si5341 A/B/C/D + "silabs,si5342" - Si5342 A/B/C/D + "silabs,si5344" - Si5344 A/B/C/D + "silabs,si5345" - Si5345 A/B/C/D - reg: i2c device address, usually 0x74 - #clock-cells: from common clock binding; shall be set to 2. The first value is "0" for outputs, "1" for synthesizers. 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); |