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ASoC: sta32x: add device tree binding.
make the sta32x driver usable with device tree configs. Code is heavily based on the sta350 driver. Signed-off-by: Thomas Niederprüm <niederp@physik.uni-kl.de> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Thomas Niederprüm
Mark Brown
parent
1c34c876c4
commit
f04b1e760a
92
Documentation/devicetree/bindings/sound/st,sta32x.txt
Normal file
92
Documentation/devicetree/bindings/sound/st,sta32x.txt
Normal file
@ -0,0 +1,92 @@
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STA32X audio CODEC
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The driver for this device only supports I2C.
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Required properties:
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- compatible: "st,sta32x"
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- reg: the I2C address of the device for I2C
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- reset-gpios: a GPIO spec for the reset pin. If specified, it will be
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deasserted before communication to the codec starts.
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- power-down-gpios: a GPIO spec for the power down pin. If specified,
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it will be deasserted before communication to the codec
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starts.
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- Vdda-supply: regulator spec, providing 3.3V
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- Vdd3-supply: regulator spec, providing 3.3V
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- Vcc-supply: regulator spec, providing 5V - 26V
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Optional properties:
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- st,output-conf: number, Selects the output configuration:
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0: 2-channel (full-bridge) power, 2-channel data-out
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1: 2 (half-bridge). 1 (full-bridge) on-board power
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2: 2 Channel (Full-Bridge) Power, 1 Channel FFX
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3: 1 Channel Mono-Parallel
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If parameter is missing, mode 0 will be enabled.
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This property has to be specified as '/bits/ 8' value.
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- st,ch1-output-mapping: Channel 1 output mapping
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- st,ch2-output-mapping: Channel 2 output mapping
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- st,ch3-output-mapping: Channel 3 output mapping
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0: Channel 1
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1: Channel 2
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2: Channel 3
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If parameter is missing, channel 1 is chosen.
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This properties have to be specified as '/bits/ 8' values.
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- st,thermal-warning-recover:
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If present, thermal warning recovery is enabled.
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- st,thermal-warning-adjustment:
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If present, thermal warning adjustment is enabled.
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- st,fault-detect-recovery:
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If present, then fault recovery will be enabled.
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- st,drop-compensation-ns: number
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Only required for "st,ffx-power-output-mode" ==
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"variable-drop-compensation".
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Specifies the drop compensation in nanoseconds.
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The value must be in the range of 0..300, and only
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multiples of 20 are allowed. Default is 140ns.
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- st,max-power-use-mpcc:
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If present, then MPCC bits are used for MPC coefficients,
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otherwise standard MPC coefficients are used.
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- st,max-power-corr:
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If present, power bridge correction for THD reduction near maximum
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power output is enabled.
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- st,am-reduction-mode:
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If present, FFX mode runs in AM reduction mode, otherwise normal
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FFX mode is used.
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- st,odd-pwm-speed-mode:
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If present, PWM speed mode run on odd speed mode (341.3 kHz) on all
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channels. If not present, normal PWM spped mode (384 kHz) will be used.
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- st,invalid-input-detect-mute:
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If present, automatic invalid input detect mute is enabled.
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Example:
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codec: sta32x@38 {
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compatible = "st,sta32x";
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reg = <0x1c>;
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reset-gpios = <&gpio1 19 0>;
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power-down-gpios = <&gpio1 16 0>;
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st,output-conf = /bits/ 8 <0x3>; // set output to 2-channel
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// (full-bridge) power,
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// 2-channel data-out
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st,ch1-output-mapping = /bits/ 8 <0>; // set channel 1 output ch 1
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st,ch2-output-mapping = /bits/ 8 <0>; // set channel 2 output ch 1
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st,ch3-output-mapping = /bits/ 8 <0>; // set channel 3 output ch 1
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st,max-power-correction; // enables power bridge
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// correction for THD reduction
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// near maximum power output
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st,invalid-input-detect-mute; // mute if no valid digital
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// audio signal is provided.
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};
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@ -24,12 +24,20 @@
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#define STA32X_THERMAL_RECOVERY_ENABLE 2
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struct sta32x_platform_data {
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int output_conf;
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int ch1_output_mapping;
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int ch2_output_mapping;
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int ch3_output_mapping;
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int thermal_conf;
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u8 output_conf;
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u8 ch1_output_mapping;
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u8 ch2_output_mapping;
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u8 ch3_output_mapping;
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int needs_esd_watchdog;
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u8 drop_compensation_ns;
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unsigned int thermal_warning_recovery:1;
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unsigned int thermal_warning_adjustment:1;
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unsigned int fault_detect_recovery:1;
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unsigned int max_power_use_mpcc:1;
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unsigned int max_power_correction:1;
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unsigned int am_reduction_mode:1;
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unsigned int odd_pwm_speed_mode:1;
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unsigned int invalid_input_detect_mute:1;
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};
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#endif /* __LINUX_SND__STA32X_H */
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@ -24,6 +24,8 @@
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#include <linux/delay.h>
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#include <linux/pm.h>
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#include <linux/i2c.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include <linux/gpio/consumer.h>
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@ -893,15 +895,49 @@ static int sta32x_probe(struct snd_soc_codec *codec)
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dev_err(codec->dev, "Failed to startup device\n");
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return ret;
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}
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/* set thermal warning adjustment and recovery */
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/* CONFA */
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if (!pdata->thermal_warning_recovery)
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thermal |= STA32X_CONFA_TWAB;
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if (!pdata->thermal_warning_adjustment)
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thermal |= STA32X_CONFA_TWRB;
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if (!pdata->fault_detect_recovery)
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thermal |= STA32X_CONFA_FDRB;
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regmap_update_bits(sta32x->regmap, STA32X_CONFA,
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STA32X_CONFA_TWAB | STA32X_CONFA_TWRB,
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STA32X_CONFA_TWAB | STA32X_CONFA_TWRB |
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STA32X_CONFA_FDRB,
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thermal);
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/* CONFC */
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regmap_update_bits(sta32x->regmap, STA32X_CONFC,
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STA32X_CONFC_CSZ_MASK,
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pdata->drop_compensation_ns
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<< STA32X_CONFC_CSZ_SHIFT);
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/* CONFE */
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regmap_update_bits(sta32x->regmap, STA32X_CONFE,
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STA32X_CONFE_MPCV,
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pdata->max_power_use_mpcc ?
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STA32X_CONFE_MPCV : 0);
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regmap_update_bits(sta32x->regmap, STA32X_CONFE,
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STA32X_CONFE_MPC,
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pdata->max_power_correction ?
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STA32X_CONFE_MPC : 0);
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regmap_update_bits(sta32x->regmap, STA32X_CONFE,
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STA32X_CONFE_AME,
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pdata->am_reduction_mode ?
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STA32X_CONFE_AME : 0);
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regmap_update_bits(sta32x->regmap, STA32X_CONFE,
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STA32X_CONFE_PWMS,
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pdata->odd_pwm_speed_mode ?
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STA32X_CONFE_PWMS : 0);
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/* CONFF */
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regmap_update_bits(sta32x->regmap, STA32X_CONFF,
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STA32X_CONFF_IDE,
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pdata->invalid_input_detect_mute ?
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STA32X_CONFF_IDE : 0);
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/* select output configuration */
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regmap_update_bits(sta32x->regmap, STA32X_CONFF,
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STA32X_CONFF_OCFG_MASK,
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@ -977,7 +1013,66 @@ static const struct regmap_config sta32x_regmap = {
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.rd_table = &sta32x_read_regs,
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.volatile_table = &sta32x_volatile_regs,
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};
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#ifdef CONFIG_OF
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static const struct of_device_id st32x_dt_ids[] = {
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{ .compatible = "st,sta32x", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, st32x_dt_ids);
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static int sta32x_probe_dt(struct device *dev, struct sta32x_priv *sta32x)
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{
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struct device_node *np = dev->of_node;
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struct sta32x_platform_data *pdata;
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u16 tmp;
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pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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of_property_read_u8(np, "st,output-conf",
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&pdata->output_conf);
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of_property_read_u8(np, "st,ch1-output-mapping",
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&pdata->ch1_output_mapping);
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of_property_read_u8(np, "st,ch2-output-mapping",
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&pdata->ch2_output_mapping);
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of_property_read_u8(np, "st,ch3-output-mapping",
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&pdata->ch3_output_mapping);
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if (of_get_property(np, "st,thermal-warning-recovery", NULL))
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pdata->thermal_warning_recovery = 1;
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if (of_get_property(np, "st,thermal-warning-adjustment", NULL))
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pdata->thermal_warning_adjustment = 1;
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if (of_get_property(np, "st,needs_esd_watchdog", NULL))
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pdata->needs_esd_watchdog = 1;
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tmp = 140;
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of_property_read_u16(np, "st,drop-compensation-ns", &tmp);
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pdata->drop_compensation_ns = clamp_t(u16, tmp, 0, 300) / 20;
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/* CONFE */
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if (of_get_property(np, "st,max-power-use-mpcc", NULL))
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pdata->max_power_use_mpcc = 1;
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if (of_get_property(np, "st,max-power-correction", NULL))
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pdata->max_power_correction = 1;
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if (of_get_property(np, "st,am-reduction-mode", NULL))
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pdata->am_reduction_mode = 1;
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if (of_get_property(np, "st,odd-pwm-speed-mode", NULL))
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pdata->odd_pwm_speed_mode = 1;
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/* CONFF */
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if (of_get_property(np, "st,invalid-input-detect-mute", NULL))
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pdata->invalid_input_detect_mute = 1;
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sta32x->pdata = pdata;
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return 0;
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}
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#endif
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static int sta32x_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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@ -994,6 +1089,14 @@ static int sta32x_i2c_probe(struct i2c_client *i2c,
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mutex_init(&sta32x->coeff_lock);
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sta32x->pdata = dev_get_platdata(dev);
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#ifdef CONFIG_OF
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if (dev->of_node) {
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ret = sta32x_probe_dt(dev, sta32x);
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if (ret < 0)
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return ret;
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}
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#endif
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/* GPIOs */
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sta32x->gpiod_nreset = devm_gpiod_get(dev, "reset");
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if (IS_ERR(sta32x->gpiod_nreset)) {
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@ -1051,6 +1154,7 @@ static struct i2c_driver sta32x_i2c_driver = {
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.driver = {
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.name = "sta32x",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(st32x_dt_ids),
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},
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.probe = sta32x_i2c_probe,
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.remove = sta32x_i2c_remove,
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