From: Robert Hancock <robert.hancock@xxxxxxxxxx> [ Upstream commit b7bbf6ec4940d1a69811ec354edeeb9751fa8e85 ] The driver was not previously programming the VDD_SEL values for each output to indicate what external VDDO voltage was used for each. Add ability to specify a regulator supplying the VDDO pin for each output of the device. The voltage of the regulator is used to automatically set the VDD_SEL value appropriately. If no regulator is specified and the chip is being reconfigured, assume 2.5V which appears to be the chip default. Signed-off-by: Robert Hancock <robert.hancock@xxxxxxxxxx> Link: https://lore.kernel.org/r/20210325192643.2190069-7-robert.hancock@xxxxxxxxxx Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx> Stable-dep-of: 2560114c06d7 ("clk: si5341: return error if one synth clock registration fails") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/clk/clk-si5341.c | 136 +++++++++++++++++++++++++++++++-------- 1 file changed, 110 insertions(+), 26 deletions(-) diff --git a/drivers/clk/clk-si5341.c b/drivers/clk/clk-si5341.c index 382a0619a0488..64d962c54bba5 100644 --- a/drivers/clk/clk-si5341.c +++ b/drivers/clk/clk-si5341.c @@ -19,6 +19,7 @@ #include <linux/i2c.h> #include <linux/module.h> #include <linux/regmap.h> +#include <linux/regulator/consumer.h> #include <linux/slab.h> #include <asm/unaligned.h> @@ -59,6 +60,7 @@ struct clk_si5341_synth { struct clk_si5341_output { struct clk_hw hw; struct clk_si5341 *data; + struct regulator *vddo_reg; u8 index; }; #define to_clk_si5341_output(_hw) \ @@ -84,6 +86,7 @@ struct clk_si5341 { struct clk_si5341_output_config { u8 out_format_drv_bits; u8 out_cm_ampl_bits; + u8 vdd_sel_bits; bool synth_master; bool always_on; }; @@ -136,6 +139,8 @@ struct clk_si5341_output_config { #define SI5341_OUT_R_REG(output) \ ((output)->data->reg_rdiv_offset[(output)->index]) +#define SI5341_OUT_MUX_VDD_SEL_MASK 0x38 + /* Synthesize N divider */ #define SI5341_SYNTH_N_NUM(x) (0x0302 + ((x) * 11)) #define SI5341_SYNTH_N_DEN(x) (0x0308 + ((x) * 11)) @@ -1250,11 +1255,11 @@ static const struct regmap_config si5341_regmap_config = { .volatile_table = &si5341_regmap_volatile, }; -static int si5341_dt_parse_dt(struct i2c_client *client, - struct clk_si5341_output_config *config) +static int si5341_dt_parse_dt(struct clk_si5341 *data, + struct clk_si5341_output_config *config) { struct device_node *child; - struct device_node *np = client->dev.of_node; + struct device_node *np = data->i2c_client->dev.of_node; u32 num; u32 val; @@ -1263,13 +1268,13 @@ static int si5341_dt_parse_dt(struct i2c_client *client, for_each_child_of_node(np, child) { if (of_property_read_u32(child, "reg", &num)) { - dev_err(&client->dev, "missing reg property of %s\n", + dev_err(&data->i2c_client->dev, "missing reg property of %s\n", child->name); goto put_child; } if (num >= SI5341_MAX_NUM_OUTPUTS) { - dev_err(&client->dev, "invalid clkout %d\n", num); + dev_err(&data->i2c_client->dev, "invalid clkout %d\n", num); goto put_child; } @@ -1288,7 +1293,7 @@ static int si5341_dt_parse_dt(struct i2c_client *client, config[num].out_format_drv_bits |= 0xc0; break; default: - dev_err(&client->dev, + dev_err(&data->i2c_client->dev, "invalid silabs,format %u for %u\n", val, num); goto put_child; @@ -1301,7 +1306,7 @@ static int si5341_dt_parse_dt(struct i2c_client *client, if (!of_property_read_u32(child, "silabs,common-mode", &val)) { if (val > 0xf) { - dev_err(&client->dev, + dev_err(&data->i2c_client->dev, "invalid silabs,common-mode %u\n", val); goto put_child; @@ -1312,7 +1317,7 @@ static int si5341_dt_parse_dt(struct i2c_client *client, if (!of_property_read_u32(child, "silabs,amplitude", &val)) { if (val > 0xf) { - dev_err(&client->dev, + dev_err(&data->i2c_client->dev, "invalid silabs,amplitude %u\n", val); goto put_child; @@ -1329,6 +1334,34 @@ static int si5341_dt_parse_dt(struct i2c_client *client, config[num].always_on = of_property_read_bool(child, "always-on"); + + config[num].vdd_sel_bits = 0x08; + if (data->clk[num].vddo_reg) { + int vdd = regulator_get_voltage(data->clk[num].vddo_reg); + + switch (vdd) { + case 3300000: + config[num].vdd_sel_bits |= 0 << 4; + break; + case 1800000: + config[num].vdd_sel_bits |= 1 << 4; + break; + case 2500000: + config[num].vdd_sel_bits |= 2 << 4; + break; + default: + dev_err(&data->i2c_client->dev, + "unsupported vddo voltage %d for %s\n", + vdd, child->name); + goto put_child; + } + } else { + /* chip seems to default to 2.5V when not set */ + dev_warn(&data->i2c_client->dev, + "no regulator set, defaulting vdd_sel to 2.5V for %s\n", + child->name); + config[num].vdd_sel_bits |= 2 << 4; + } } return 0; @@ -1454,9 +1487,33 @@ static int si5341_probe(struct i2c_client *client, } } - err = si5341_dt_parse_dt(client, config); + for (i = 0; i < SI5341_MAX_NUM_OUTPUTS; ++i) { + char reg_name[10]; + + snprintf(reg_name, sizeof(reg_name), "vddo%d", i); + data->clk[i].vddo_reg = devm_regulator_get_optional( + &client->dev, reg_name); + if (IS_ERR(data->clk[i].vddo_reg)) { + err = PTR_ERR(data->clk[i].vddo_reg); + data->clk[i].vddo_reg = NULL; + if (err == -ENODEV) + continue; + goto cleanup; + } else { + err = regulator_enable(data->clk[i].vddo_reg); + if (err) { + dev_err(&client->dev, + "failed to enable %s regulator: %d\n", + reg_name, err); + data->clk[i].vddo_reg = NULL; + goto cleanup; + } + } + } + + err = si5341_dt_parse_dt(data, config); if (err) - return err; + goto cleanup; if (of_property_read_string(client->dev.of_node, "clock-output-names", &init.name)) @@ -1464,21 +1521,23 @@ static int si5341_probe(struct i2c_client *client, root_clock_name = init.name; data->regmap = devm_regmap_init_i2c(client, &si5341_regmap_config); - if (IS_ERR(data->regmap)) - return PTR_ERR(data->regmap); + if (IS_ERR(data->regmap)) { + err = PTR_ERR(data->regmap); + goto cleanup; + } i2c_set_clientdata(client, data); err = si5341_probe_chip_id(data); if (err < 0) - return err; + goto cleanup; if (of_property_read_bool(client->dev.of_node, "silabs,reprogram")) { initialization_required = true; } else { err = si5341_is_programmed_already(data); if (err < 0) - return err; + goto cleanup; initialization_required = !err; } @@ -1487,11 +1546,11 @@ static int si5341_probe(struct i2c_client *client, /* Populate the regmap cache in preparation for "cache only" */ err = si5341_read_settings(data); if (err < 0) - return err; + goto cleanup; err = si5341_send_preamble(data); if (err < 0) - return err; + goto cleanup; /* * We intend to send all 'final' register values in a single @@ -1504,19 +1563,19 @@ static int si5341_probe(struct i2c_client *client, err = si5341_write_multiple(data, si5341_reg_defaults, ARRAY_SIZE(si5341_reg_defaults)); if (err < 0) - return err; + goto cleanup; } /* Input must be up and running at this point */ err = si5341_clk_select_active_input(data); if (err < 0) - return err; + goto cleanup; if (initialization_required) { /* PLL configuration is required */ err = si5341_initialize_pll(data); if (err < 0) - return err; + goto cleanup; } /* Register the PLL */ @@ -1529,7 +1588,7 @@ static int si5341_probe(struct i2c_client *client, err = devm_clk_hw_register(&client->dev, &data->hw); if (err) { dev_err(&client->dev, "clock registration failed\n"); - return err; + goto cleanup; } init.num_parents = 1; @@ -1566,13 +1625,17 @@ static int si5341_probe(struct i2c_client *client, regmap_write(data->regmap, SI5341_OUT_CM(&data->clk[i]), config[i].out_cm_ampl_bits); + regmap_update_bits(data->regmap, + SI5341_OUT_MUX_SEL(&data->clk[i]), + SI5341_OUT_MUX_VDD_SEL_MASK, + config[i].vdd_sel_bits); } err = devm_clk_hw_register(&client->dev, &data->clk[i].hw); kfree(init.name); /* clock framework made a copy of the name */ if (err) { dev_err(&client->dev, "output %u registration failed\n", i); - return err; + goto cleanup; } if (config[i].always_on) clk_prepare(data->clk[i].hw.clk); @@ -1582,7 +1645,7 @@ static int si5341_probe(struct i2c_client *client, data); if (err) { dev_err(&client->dev, "unable to add clk provider\n"); - return err; + goto cleanup; } if (initialization_required) { @@ -1590,11 +1653,11 @@ static int si5341_probe(struct i2c_client *client, regcache_cache_only(data->regmap, false); err = regcache_sync(data->regmap); if (err < 0) - return err; + goto cleanup; err = si5341_finalize_defaults(data); if (err < 0) - return err; + goto cleanup; } /* wait for device to report input clock present and PLL lock */ @@ -1603,14 +1666,14 @@ static int si5341_probe(struct i2c_client *client, 10000, 250000); if (err) { dev_err(&client->dev, "Error waiting for input clock or PLL lock\n"); - return err; + goto cleanup; } /* clear sticky alarm bits from initialization */ err = regmap_write(data->regmap, SI5341_STATUS_STICKY, 0); if (err) { dev_err(&client->dev, "unable to clear sticky status\n"); - return err; + goto cleanup; } /* Free the names, clk framework makes copies */ @@ -1618,6 +1681,26 @@ static int si5341_probe(struct i2c_client *client, devm_kfree(&client->dev, (void *)synth_clock_names[i]); return 0; + +cleanup: + for (i = 0; i < SI5341_MAX_NUM_OUTPUTS; ++i) { + if (data->clk[i].vddo_reg) + regulator_disable(data->clk[i].vddo_reg); + } + return err; +} + +static int si5341_remove(struct i2c_client *client) +{ + struct clk_si5341 *data = i2c_get_clientdata(client); + int i; + + for (i = 0; i < SI5341_MAX_NUM_OUTPUTS; ++i) { + if (data->clk[i].vddo_reg) + regulator_disable(data->clk[i].vddo_reg); + } + + return 0; } static const struct i2c_device_id si5341_id[] = { @@ -1646,6 +1729,7 @@ static struct i2c_driver si5341_driver = { .of_match_table = clk_si5341_of_match, }, .probe = si5341_probe, + .remove = si5341_remove, .id_table = si5341_id, }; module_i2c_driver(si5341_driver); -- 2.39.2
