[alsa-devel] [PATCH 0/2] ASoC: da7219: Convert driver to use generic FW functions
This patch set converts the da7219 codec driver to use device/fwnode functions to access properties, instead of the DT only of_* functions, allowing ACPI to be used as well.
The DT bindings for da7219 have a device node for the main codec properties, and a named child node (da7219_aad), which contains all of the accessory detection related properties for the device. ACPI also supports this kind of FW hierarchy (data only sub-nodes), but some support in the kernel needs to be added to take make use of this in driver code.
The first patch adds functions to allow searching for a named child node of a device, for both DT and ACPI, and the second patch updates the codec driver to use the standard device/fwnode calls, including this new function.
These changes are based on the v4.6 kernel.
Adam Thomson (2): device property: Add function to search for named child of device ASoC: da7219: Convert driver to use generic device/fwnode functions
drivers/base/property.c | 28 ++++++++++++ include/acpi/acpi_bus.h | 7 +++ include/linux/acpi.h | 6 +++ include/linux/property.h | 3 ++ sound/soc/codecs/da7219-aad.c | 103 +++++++++++++++++++++--------------------- sound/soc/codecs/da7219.c | 34 +++++++------- 6 files changed, 112 insertions(+), 69 deletions(-)
-- 1.9.3
For device nodes in both DT and ACPI, it possible to have named child nodes which contain properties (an existing example being gpio-leds). This adds a function to find a named child node for a device which can be used by drivers for property retrieval.
For ACPI data node name matching, a helper function is also added which returns false if CONFIG_ACPI is not set, otherwise it performs a string comparison on the data node name. This avoids using the acpi_data_node struct for non CONFIG_ACPI builds, which would otherwise cause a build failure.
Signed-off-by: Adam Thomson Adam.Thomson.Opensource@diasemi.com Tested-by: Sathyanarayana Nujella sathyanarayana.nujella@intel.com --- drivers/base/property.c | 28 ++++++++++++++++++++++++++++ include/acpi/acpi_bus.h | 7 +++++++ include/linux/acpi.h | 6 ++++++ include/linux/property.h | 3 +++ 4 files changed, 44 insertions(+)
diff --git a/drivers/base/property.c b/drivers/base/property.c index 7f692ac..8b2cb09 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -880,6 +880,34 @@ struct fwnode_handle *device_get_next_child_node(struct device *dev, EXPORT_SYMBOL_GPL(device_get_next_child_node);
/** + * device_get_named_child_node - Return first matching named child node handle + * @dev: Device to find the named child node for. + * @childname: String to match child node name against. + */ +struct fwnode_handle *device_get_named_child_node(struct device *dev, + const char *childname) +{ + struct fwnode_handle *child; + + /* + * Find first matching named child node of this device. + * For ACPI this will be a data only sub-node. + */ + device_for_each_child_node(dev, child) { + if (is_of_node(child)) { + if (!strcasecmp(to_of_node(child)->name, childname)) + return child; + } else if (is_acpi_data_node(child)) { + if (acpi_data_node_match(child, childname)) + return child; + } + } + + return NULL; +} +EXPORT_SYMBOL_GPL(device_get_named_child_node); + +/** * fwnode_handle_put - Drop reference to a device node * @fwnode: Pointer to the device node to drop the reference to. * diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 3a93250..6dc3544 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -420,6 +420,13 @@ static inline struct acpi_data_node *to_acpi_data_node(struct fwnode_handle *fwn container_of(fwnode, struct acpi_data_node, fwnode) : NULL; }
+static inline bool acpi_data_node_match(struct fwnode_handle *fwnode, + const char *name) +{ + return is_acpi_data_node(fwnode) ? + (!strcasecmp(to_acpi_data_node(fwnode)->name, name)) : false; +} + static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev) { return &adev->fwnode; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 06ed7e5..c37a385 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -576,6 +576,12 @@ static inline struct acpi_data_node *to_acpi_data_node(struct fwnode_handle *fwn return NULL; }
+static inline bool acpi_data_node_match(struct fwnode_handle *fwnode, + const char *name) +{ + return false; +} + static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev) { return NULL; diff --git a/include/linux/property.h b/include/linux/property.h index b51fcd3..d2752dc 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -77,6 +77,9 @@ struct fwnode_handle *device_get_next_child_node(struct device *dev, for (child = device_get_next_child_node(dev, NULL); child; \ child = device_get_next_child_node(dev, child))
+struct fwnode_handle *device_get_named_child_node(struct device *dev, + const char *childname); + void fwnode_handle_put(struct fwnode_handle *fwnode);
unsigned int device_get_child_node_count(struct device *dev); -- 1.9.3
This change converts the driver from using the of_* functions to using the device_* and fwnode_* functions for accssing FW related data.
Signed-off-by: Adam Thomson Adam.Thomson.Opensource@diasemi.com Tested-by: Sathyanarayana Nujella sathyanarayana.nujella@intel.com ---
Changes in v2: - Rename functions to use _fw_ instead of _of_, to align with generic access. - Use new device property function to find named child, rather than local function. - Remove checking for DT/ACPI fwnode types, and perform FW reading if platform data not already provided. - Remove ACPI and OF includes for AAD code, as no longer needed. - Restore accidentally removed blank line.
sound/soc/codecs/da7219-aad.c | 103 +++++++++++++++++++++--------------------- sound/soc/codecs/da7219.c | 34 +++++++------- 2 files changed, 68 insertions(+), 69 deletions(-)
diff --git a/sound/soc/codecs/da7219-aad.c b/sound/soc/codecs/da7219-aad.c index 9459593..04ca42c 100644 --- a/sound/soc/codecs/da7219-aad.c +++ b/sound/soc/codecs/da7219-aad.c @@ -13,8 +13,8 @@
#include <linux/module.h> #include <linux/platform_device.h> -#include <linux/of_device.h> -#include <linux/of_irq.h> +#include <linux/i2c.h> +#include <linux/property.h> #include <linux/pm_wakeirq.h> #include <linux/slab.h> #include <linux/delay.h> @@ -382,11 +382,11 @@ static irqreturn_t da7219_aad_irq_thread(int irq, void *data) }
/* - * DT to pdata conversion + * DT/ACPI to pdata conversion */
static enum da7219_aad_micbias_pulse_lvl - da7219_aad_of_micbias_pulse_lvl(struct snd_soc_codec *codec, u32 val) + da7219_aad_fw_micbias_pulse_lvl(struct snd_soc_codec *codec, u32 val) { switch (val) { case 2800: @@ -400,7 +400,7 @@ static enum da7219_aad_micbias_pulse_lvl }
static enum da7219_aad_btn_cfg - da7219_aad_of_btn_cfg(struct snd_soc_codec *codec, u32 val) + da7219_aad_fw_btn_cfg(struct snd_soc_codec *codec, u32 val) { switch (val) { case 2: @@ -424,7 +424,7 @@ static enum da7219_aad_btn_cfg }
static enum da7219_aad_mic_det_thr - da7219_aad_of_mic_det_thr(struct snd_soc_codec *codec, u32 val) + da7219_aad_fw_mic_det_thr(struct snd_soc_codec *codec, u32 val) { switch (val) { case 200: @@ -442,7 +442,7 @@ static enum da7219_aad_mic_det_thr }
static enum da7219_aad_jack_ins_deb - da7219_aad_of_jack_ins_deb(struct snd_soc_codec *codec, u32 val) + da7219_aad_fw_jack_ins_deb(struct snd_soc_codec *codec, u32 val) { switch (val) { case 5: @@ -468,7 +468,7 @@ static enum da7219_aad_jack_ins_deb }
static enum da7219_aad_jack_det_rate - da7219_aad_of_jack_det_rate(struct snd_soc_codec *codec, const char *str) + da7219_aad_fw_jack_det_rate(struct snd_soc_codec *codec, const char *str) { if (!strcmp(str, "32ms_64ms")) { return DA7219_AAD_JACK_DET_RATE_32_64MS; @@ -485,7 +485,7 @@ static enum da7219_aad_jack_det_rate }
static enum da7219_aad_jack_rem_deb - da7219_aad_of_jack_rem_deb(struct snd_soc_codec *codec, u32 val) + da7219_aad_fw_jack_rem_deb(struct snd_soc_codec *codec, u32 val) { switch (val) { case 1: @@ -503,7 +503,7 @@ static enum da7219_aad_jack_rem_deb }
static enum da7219_aad_btn_avg - da7219_aad_of_btn_avg(struct snd_soc_codec *codec, u32 val) + da7219_aad_fw_btn_avg(struct snd_soc_codec *codec, u32 val) { switch (val) { case 1: @@ -521,7 +521,7 @@ static enum da7219_aad_btn_avg }
static enum da7219_aad_adc_1bit_rpt - da7219_aad_of_adc_1bit_rpt(struct snd_soc_codec *codec, u32 val) + da7219_aad_fw_adc_1bit_rpt(struct snd_soc_codec *codec, u32 val) { switch (val) { case 1: @@ -538,97 +538,96 @@ static enum da7219_aad_adc_1bit_rpt } }
-static struct da7219_aad_pdata *da7219_aad_of_to_pdata(struct snd_soc_codec *codec) +static struct da7219_aad_pdata *da7219_aad_fw_to_pdata(struct snd_soc_codec *codec) { - struct device_node *np = codec->dev->of_node; - struct device_node *aad_np = of_find_node_by_name(np, "da7219_aad"); + struct device *dev = codec->dev; + struct i2c_client *i2c = to_i2c_client(dev); + struct fwnode_handle *aad_np = + device_get_named_child_node(dev, "da7219_aad"); struct da7219_aad_pdata *aad_pdata; - const char *of_str; - u32 of_val32; + const char *fw_str; + u32 fw_val32;
if (!aad_np) return NULL;
aad_pdata = devm_kzalloc(codec->dev, sizeof(*aad_pdata), GFP_KERNEL); if (!aad_pdata) - goto out; + return NULL;
- aad_pdata->irq = irq_of_parse_and_map(np, 0); + aad_pdata->irq = i2c->irq;
- if (of_property_read_u32(aad_np, "dlg,micbias-pulse-lvl", - &of_val32) >= 0) + if (fwnode_property_read_u32(aad_np, "dlg,micbias-pulse-lvl", + &fw_val32) >= 0) aad_pdata->micbias_pulse_lvl = - da7219_aad_of_micbias_pulse_lvl(codec, of_val32); + da7219_aad_fw_micbias_pulse_lvl(codec, fw_val32); else aad_pdata->micbias_pulse_lvl = DA7219_AAD_MICBIAS_PULSE_LVL_OFF;
- if (of_property_read_u32(aad_np, "dlg,micbias-pulse-time", - &of_val32) >= 0) - aad_pdata->micbias_pulse_time = of_val32; + if (fwnode_property_read_u32(aad_np, "dlg,micbias-pulse-time", + &fw_val32) >= 0) + aad_pdata->micbias_pulse_time = fw_val32;
- if (of_property_read_u32(aad_np, "dlg,btn-cfg", &of_val32) >= 0) - aad_pdata->btn_cfg = da7219_aad_of_btn_cfg(codec, of_val32); + if (fwnode_property_read_u32(aad_np, "dlg,btn-cfg", &fw_val32) >= 0) + aad_pdata->btn_cfg = da7219_aad_fw_btn_cfg(codec, fw_val32); else aad_pdata->btn_cfg = DA7219_AAD_BTN_CFG_10MS;
- if (of_property_read_u32(aad_np, "dlg,mic-det-thr", &of_val32) >= 0) + if (fwnode_property_read_u32(aad_np, "dlg,mic-det-thr", &fw_val32) >= 0) aad_pdata->mic_det_thr = - da7219_aad_of_mic_det_thr(codec, of_val32); + da7219_aad_fw_mic_det_thr(codec, fw_val32); else aad_pdata->mic_det_thr = DA7219_AAD_MIC_DET_THR_500_OHMS;
- if (of_property_read_u32(aad_np, "dlg,jack-ins-deb", &of_val32) >= 0) + if (fwnode_property_read_u32(aad_np, "dlg,jack-ins-deb", &fw_val32) >= 0) aad_pdata->jack_ins_deb = - da7219_aad_of_jack_ins_deb(codec, of_val32); + da7219_aad_fw_jack_ins_deb(codec, fw_val32); else aad_pdata->jack_ins_deb = DA7219_AAD_JACK_INS_DEB_20MS;
- if (!of_property_read_string(aad_np, "dlg,jack-det-rate", &of_str)) + if (!fwnode_property_read_string(aad_np, "dlg,jack-det-rate", &fw_str)) aad_pdata->jack_det_rate = - da7219_aad_of_jack_det_rate(codec, of_str); + da7219_aad_fw_jack_det_rate(codec, fw_str); else aad_pdata->jack_det_rate = DA7219_AAD_JACK_DET_RATE_256_512MS;
- if (of_property_read_u32(aad_np, "dlg,jack-rem-deb", &of_val32) >= 0) + if (fwnode_property_read_u32(aad_np, "dlg,jack-rem-deb", &fw_val32) >= 0) aad_pdata->jack_rem_deb = - da7219_aad_of_jack_rem_deb(codec, of_val32); + da7219_aad_fw_jack_rem_deb(codec, fw_val32); else aad_pdata->jack_rem_deb = DA7219_AAD_JACK_REM_DEB_1MS;
- if (of_property_read_u32(aad_np, "dlg,a-d-btn-thr", &of_val32) >= 0) - aad_pdata->a_d_btn_thr = (u8) of_val32; + if (fwnode_property_read_u32(aad_np, "dlg,a-d-btn-thr", &fw_val32) >= 0) + aad_pdata->a_d_btn_thr = (u8) fw_val32; else aad_pdata->a_d_btn_thr = 0xA;
- if (of_property_read_u32(aad_np, "dlg,d-b-btn-thr", &of_val32) >= 0) - aad_pdata->d_b_btn_thr = (u8) of_val32; + if (fwnode_property_read_u32(aad_np, "dlg,d-b-btn-thr", &fw_val32) >= 0) + aad_pdata->d_b_btn_thr = (u8) fw_val32; else aad_pdata->d_b_btn_thr = 0x16;
- if (of_property_read_u32(aad_np, "dlg,b-c-btn-thr", &of_val32) >= 0) - aad_pdata->b_c_btn_thr = (u8) of_val32; + if (fwnode_property_read_u32(aad_np, "dlg,b-c-btn-thr", &fw_val32) >= 0) + aad_pdata->b_c_btn_thr = (u8) fw_val32; else aad_pdata->b_c_btn_thr = 0x21;
- if (of_property_read_u32(aad_np, "dlg,c-mic-btn-thr", &of_val32) >= 0) - aad_pdata->c_mic_btn_thr = (u8) of_val32; + if (fwnode_property_read_u32(aad_np, "dlg,c-mic-btn-thr", &fw_val32) >= 0) + aad_pdata->c_mic_btn_thr = (u8) fw_val32; else aad_pdata->c_mic_btn_thr = 0x3E;
- if (of_property_read_u32(aad_np, "dlg,btn-avg", &of_val32) >= 0) - aad_pdata->btn_avg = da7219_aad_of_btn_avg(codec, of_val32); + if (fwnode_property_read_u32(aad_np, "dlg,btn-avg", &fw_val32) >= 0) + aad_pdata->btn_avg = da7219_aad_fw_btn_avg(codec, fw_val32); else aad_pdata->btn_avg = DA7219_AAD_BTN_AVG_2;
- if (of_property_read_u32(aad_np, "dlg,adc-1bit-rpt", &of_val32) >= 0) + if (fwnode_property_read_u32(aad_np, "dlg,adc-1bit-rpt", &fw_val32) >= 0) aad_pdata->adc_1bit_rpt = - da7219_aad_of_adc_1bit_rpt(codec, of_val32); + da7219_aad_fw_adc_1bit_rpt(codec, fw_val32); else aad_pdata->adc_1bit_rpt = DA7219_AAD_ADC_1BIT_RPT_1;
-out: - of_node_put(aad_np); - return aad_pdata; }
@@ -769,9 +768,9 @@ int da7219_aad_init(struct snd_soc_codec *codec) da7219->aad = da7219_aad; da7219_aad->codec = codec;
- /* Handle any DT/platform data */ - if ((codec->dev->of_node) && (da7219->pdata)) - da7219->pdata->aad_pdata = da7219_aad_of_to_pdata(codec); + /* Handle any DT/ACPI/platform data */ + if ((da7219->pdata) && (!da7219->pdata->aad_pdata)) + da7219->pdata->aad_pdata = da7219_aad_fw_to_pdata(codec);
da7219_aad_handle_pdata(codec);
diff --git a/sound/soc/codecs/da7219.c b/sound/soc/codecs/da7219.c index 2c9709b..639fcd5 100644 --- a/sound/soc/codecs/da7219.c +++ b/sound/soc/codecs/da7219.c @@ -15,6 +15,7 @@ #include <linux/clk.h> #include <linux/i2c.h> #include <linux/of_device.h> +#include <linux/property.h> #include <linux/regmap.h> #include <linux/slab.h> #include <linux/pm.h> @@ -1418,7 +1419,7 @@ static struct snd_soc_dai_driver da7219_dai = {
/* - * DT + * DT/ACPI */
static const struct of_device_id da7219_of_match[] = { @@ -1434,7 +1435,7 @@ static const struct acpi_device_id da7219_acpi_match[] = { MODULE_DEVICE_TABLE(acpi, da7219_acpi_match);
static enum da7219_micbias_voltage - da7219_of_micbias_lvl(struct snd_soc_codec *codec, u32 val) + da7219_fw_micbias_lvl(struct device *dev, u32 val) { switch (val) { case 1600: @@ -1450,13 +1451,13 @@ static enum da7219_micbias_voltage case 2600: return DA7219_MICBIAS_2_6V; default: - dev_warn(codec->dev, "Invalid micbias level"); + dev_warn(dev, "Invalid micbias level"); return DA7219_MICBIAS_2_2V; } }
static enum da7219_mic_amp_in_sel - da7219_of_mic_amp_in_sel(struct snd_soc_codec *codec, const char *str) + da7219_fw_mic_amp_in_sel(struct device *dev, const char *str) { if (!strcmp(str, "diff")) { return DA7219_MIC_AMP_IN_SEL_DIFF; @@ -1465,29 +1466,29 @@ static enum da7219_mic_amp_in_sel } else if (!strcmp(str, "se_n")) { return DA7219_MIC_AMP_IN_SEL_SE_N; } else { - dev_warn(codec->dev, "Invalid mic input type selection"); + dev_warn(dev, "Invalid mic input type selection"); return DA7219_MIC_AMP_IN_SEL_DIFF; } }
-static struct da7219_pdata *da7219_of_to_pdata(struct snd_soc_codec *codec) +static struct da7219_pdata *da7219_fw_to_pdata(struct snd_soc_codec *codec) { - struct device_node *np = codec->dev->of_node; + struct device *dev = codec->dev; struct da7219_pdata *pdata; const char *of_str; u32 of_val32;
- pdata = devm_kzalloc(codec->dev, sizeof(*pdata), GFP_KERNEL); + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return NULL;
- if (of_property_read_u32(np, "dlg,micbias-lvl", &of_val32) >= 0) - pdata->micbias_lvl = da7219_of_micbias_lvl(codec, of_val32); + if (device_property_read_u32(dev, "dlg,micbias-lvl", &of_val32) >= 0) + pdata->micbias_lvl = da7219_fw_micbias_lvl(dev, of_val32); else pdata->micbias_lvl = DA7219_MICBIAS_2_2V;
- if (!of_property_read_string(np, "dlg,mic-amp-in-sel", &of_str)) - pdata->mic_amp_in_sel = da7219_of_mic_amp_in_sel(codec, of_str); + if (!device_property_read_string(dev, "dlg,mic-amp-in-sel", &of_str)) + pdata->mic_amp_in_sel = da7219_fw_mic_amp_in_sel(dev, of_str); else pdata->mic_amp_in_sel = DA7219_MIC_AMP_IN_SEL_DIFF;
@@ -1662,11 +1663,10 @@ static int da7219_probe(struct snd_soc_codec *codec) break; }
- /* Handle DT/Platform data */ - if (codec->dev->of_node) - da7219->pdata = da7219_of_to_pdata(codec); - else - da7219->pdata = dev_get_platdata(codec->dev); + /* Handle DT/ACPI/Platform data */ + da7219->pdata = dev_get_platdata(codec->dev); + if (!da7219->pdata) + da7219->pdata = da7219_fw_to_pdata(codec);
da7219_handle_pdata(codec);
-- 1.9.3
On Tue, 2016-05-17 at 11:28 +0100, Adam Thomson wrote:
This change converts the driver from using the of_* functions to using the device_* and fwnode_* functions for accssing FW related data.
Signed-off-by: Adam Thomson Adam.Thomson.Opensource@diasemi.com Tested-by: Sathyanarayana Nujella sathyanarayana.nujella@intel.com
@@ -538,97 +538,96 @@ static enum da7219_aad_adc_1bit_rpt
} }
-static struct da7219_aad_pdata *da7219_aad_of_to_pdata(struct snd_soc_codec *codec) +static struct da7219_aad_pdata *da7219_aad_fw_to_pdata(struct snd_soc_codec *codec) {
- struct device_node *np = codec->dev->of_node;
- struct device_node *aad_np = of_find_node_by_name(np,
"da7219_aad");
- struct device *dev = codec->dev;
- struct i2c_client *i2c = to_i2c_client(dev);
- struct fwnode_handle *aad_np =
device_get_named_child_node(dev, "da7219_aad");
I would suggest to do an assignment below...
struct da7219_aad_pdata *aad_pdata;
- const char *of_str;
- u32 of_val32;
- const char *fw_str;
- u32 fw_val32;
...right here. Same amount of LOC, but less difficult to see from where aad_np comes.
if (!aad_np) return NULL;
@@ -769,9 +768,9 @@ int da7219_aad_init(struct snd_soc_codec *codec) da7219->aad = da7219_aad; da7219_aad->codec = codec;
- /* Handle any DT/platform data */
- if ((codec->dev->of_node) && (da7219->pdata))
da7219->pdata->aad_pdata =da7219_aad_of_to_pdata(codec);
- /* Handle any DT/ACPI/platform data */
- if ((da7219->pdata) && (!da7219->pdata->aad_pdata))
Redundant parens, twice.
On May 19, 2015 14:28, Andy Shevchenko wrote:
-static struct da7219_aad_pdata *da7219_aad_of_to_pdata(struct snd_soc_codec *codec) +static struct da7219_aad_pdata *da7219_aad_fw_to_pdata(struct snd_soc_codec *codec) {
- struct device_node *np = codec->dev->of_node;
- struct device_node *aad_np = of_find_node_by_name(np,
"da7219_aad");
- struct device *dev = codec->dev;
- struct i2c_client *i2c = to_i2c_client(dev);
- struct fwnode_handle *aad_np =
device_get_named_child_node(dev, "da7219_aad");I would suggest to do an assignment below...
struct da7219_aad_pdata *aad_pdata;
- const char *of_str;
- u32 of_val32;
- const char *fw_str;
- u32 fw_val32;
...right here. Same amount of LOC, but less difficult to see from where aad_np comes.
if (!aad_np) return NULL;
To be fair the allocation of 'aad_np' is only a few lines above so this really doesn't seem to make much difference in my opinion. It really shouldn't be hard for someone to spot where it's allocated.
@@ -769,9 +768,9 @@ int da7219_aad_init(struct snd_soc_codec *codec) da7219->aad = da7219_aad; da7219_aad->codec = codec;
- /* Handle any DT/platform data */
- if ((codec->dev->of_node) && (da7219->pdata))
da7219->pdata->aad_pdata =da7219_aad_of_to_pdata(codec);
- /* Handle any DT/ACPI/platform data */
if ((da7219->pdata) && (!da7219->pdata->aad_pdata))Redundant parens, twice.
Not essential, but looks cleaner to me. Unless there's a real demand to change, I'd like to leave this as is.
On Mon, 2016-05-23 at 22:53 +0000, Opensource [Adam Thomson] wrote:
On May 19, 2015 14:28, Andy Shevchenko wrote:
-static struct da7219_aad_pdata *da7219_aad_of_to_pdata(struct snd_soc_codec *codec) +static struct da7219_aad_pdata *da7219_aad_fw_to_pdata(struct snd_soc_codec *codec) {
- struct device_node *np = codec->dev->of_node;
- struct device_node *aad_np = of_find_node_by_name(np,
"da7219_aad");
- struct device *dev = codec->dev;
- struct i2c_client *i2c = to_i2c_client(dev);
- struct fwnode_handle *aad_np =
device_get_named_child_node(dev, "da7219_aad");I would suggest to do an assignment below...
struct da7219_aad_pdata *aad_pdata;
- const char *of_str;
- u32 of_val32;
- const char *fw_str;
- u32 fw_val32;
...right here. Same amount of LOC, but less difficult to see from where aad_np comes.
if (!aad_np) return NULL;
To be fair the allocation of 'aad_np' is only a few lines above so this really doesn't seem to make much difference in my opinion. It really shouldn't be hard for someone to spot where it's allocated.
Better to have it exactly before check. Just a readability and future maintenance. (Someone might insert something in between, and a matter of fact already did)
Though I agree this is minor.
@@ -769,9 +768,9 @@ int da7219_aad_init(struct snd_soc_codec *codec) da7219->aad = da7219_aad; da7219_aad->codec = codec;
- /* Handle any DT/platform data */
- if ((codec->dev->of_node) && (da7219->pdata))
da7219->pdata->aad_pdata =da7219_aad_of_to_pdata(codec);
- /* Handle any DT/ACPI/platform data */
+ if ((da7219->pdata) && (!da7219->pdata->aad_pdata))
Redundant parens, twice.
Not essential, but looks cleaner to me. Unless there's a real demand to change, I'd like to leave this as is.
It's really unusual pattern and doesn't add any value
Compare if ((da7219->pdata) && (!da7219->pdata->aad_pdata)) to if (da7219->pdata && !da7219->pdata->aad_pdata)
Latter looks cleaner.
participants (3)
-
Adam Thomson -
Andy Shevchenko -
Opensource [Adam Thomson]