staging: bcm2835-audio: Simplify kctl creation helpers

Just a minor code refactoring and adding some const prefix.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c
index e17b72f21a9d3ec5445eed743780ed45dc64472e..a6ec72a5f0bece85fed0bc248981c131fff77053 100644 (file)
--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-ctl.c
@@ -97,40 +97,34 @@ static int snd_bcm2835_ctl_put(struct snd_kcontrol *kcontrol,
 
 static DECLARE_TLV_DB_SCALE(snd_bcm2835_db_scale, CTRL_VOL_MIN, 1, 1);
 
-static struct snd_kcontrol_new snd_bcm2835_ctl[] = {
+static const struct snd_kcontrol_new snd_bcm2835_ctl[] = {
        {
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = "PCM Playback Volume",
-               .index = 0,
                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ,
                .private_value = PCM_PLAYBACK_VOLUME,
                .info = snd_bcm2835_ctl_info,
                .get = snd_bcm2835_ctl_get,
                .put = snd_bcm2835_ctl_put,
-               .count = 1,
                .tlv = {.p = snd_bcm2835_db_scale}
        },
        {
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = "PCM Playback Switch",
-               .index = 0,
                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
                .private_value = PCM_PLAYBACK_MUTE,
                .info = snd_bcm2835_ctl_info,
                .get = snd_bcm2835_ctl_get,
                .put = snd_bcm2835_ctl_put,
-               .count = 1,
        },
        {
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = "PCM Playback Route",
-               .index = 0,
                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
                .private_value = PCM_PLAYBACK_DEVICE,
                .info = snd_bcm2835_ctl_info,
                .get = snd_bcm2835_ctl_get,
                .put = snd_bcm2835_ctl_put,
-               .count = 1,
        },
 };
 
@@ -196,7 +190,7 @@ static int snd_bcm2835_spdif_mask_get(struct snd_kcontrol *kcontrol,
        return 0;
 }
 
-static struct snd_kcontrol_new snd_bcm2835_spdif[] = {
+static const struct snd_kcontrol_new snd_bcm2835_spdif[] = {
        {
                .iface = SNDRV_CTL_ELEM_IFACE_PCM,
                .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
@@ -213,28 +207,32 @@ static struct snd_kcontrol_new snd_bcm2835_spdif[] = {
        },
 };
 
-int snd_bcm2835_new_ctl(struct bcm2835_chip *chip)
+static int create_ctls(struct bcm2835_chip *chip, size_t size,
+                      const struct snd_kcontrol_new *kctls)
 {
-       int err;
-       unsigned int idx;
+       int i, err;
 
-       strcpy(chip->card->mixername, "Broadcom Mixer");
-       for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_ctl); idx++) {
-               err = snd_ctl_add(chip->card,
-                                 snd_ctl_new1(&snd_bcm2835_ctl[idx], chip));
-               if (err < 0)
-                       return err;
-       }
-       for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_spdif); idx++) {
-               err = snd_ctl_add(chip->card,
-                                 snd_ctl_new1(&snd_bcm2835_spdif[idx], chip));
+       for (i = 0; i < size; i++) {
+               err = snd_ctl_add(chip->card, snd_ctl_new1(&kctls[i], chip));
                if (err < 0)
                        return err;
        }
        return 0;
 }
 
-static struct snd_kcontrol_new snd_bcm2835_headphones_ctl[] = {
+int snd_bcm2835_new_ctl(struct bcm2835_chip *chip)
+{
+       int err;
+
+       strcpy(chip->card->mixername, "Broadcom Mixer");
+       err = create_ctls(chip, ARRAY_SIZE(snd_bcm2835_ctl), snd_bcm2835_ctl);
+       if (err < 0)
+               return err;
+       return create_ctls(chip, ARRAY_SIZE(snd_bcm2835_spdif),
+                          snd_bcm2835_spdif);
+}
+
+static const struct snd_kcontrol_new snd_bcm2835_headphones_ctl[] = {
        {
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = "Headphone Playback Volume",
@@ -263,21 +261,12 @@ static struct snd_kcontrol_new snd_bcm2835_headphones_ctl[] = {
 
 int snd_bcm2835_new_headphones_ctl(struct bcm2835_chip *chip)
 {
-       int err;
-       unsigned int idx;
-
        strcpy(chip->card->mixername, "Broadcom Mixer");
-       for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_headphones_ctl); idx++) {
-               err = snd_ctl_add(chip->card,
-                                 snd_ctl_new1(&snd_bcm2835_headphones_ctl[idx],
-                                              chip));
-               if (err)
-                       return err;
-       }
-       return 0;
+       return create_ctls(chip, ARRAY_SIZE(snd_bcm2835_headphones_ctl),
+                          snd_bcm2835_headphones_ctl);
 }
 
-static struct snd_kcontrol_new snd_bcm2835_hdmi[] = {
+static const struct snd_kcontrol_new snd_bcm2835_hdmi[] = {
        {
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = "HDMI Playback Volume",
@@ -306,16 +295,8 @@ static struct snd_kcontrol_new snd_bcm2835_hdmi[] = {
 
 int snd_bcm2835_new_hdmi_ctl(struct bcm2835_chip *chip)
 {
-       int err;
-       unsigned int idx;
-
        strcpy(chip->card->mixername, "Broadcom Mixer");
-       for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_hdmi); idx++) {
-               err = snd_ctl_add(chip->card,
-                                 snd_ctl_new1(&snd_bcm2835_hdmi[idx], chip));
-               if (err)
-                       return err;
-       }
-       return 0;
+       return create_ctls(chip, ARRAY_SIZE(snd_bcm2835_hdmi),
+                          snd_bcm2835_hdmi);
 }