Accessiblity: speakup_audptr: specifying the default driver parameters among the module params

This is an enhancement which allows to specify the default driver
parameters among the module parameters.

Adding a default variables to the speakup_audptr module
allows to easily set that at boot, rather than
setting the sys variables after boot.
More details can be found here:
https://github.com/linux-speakup/speakup/issues/7

Signed-off-by: Osama Muhammad <[e-mail]>
Reviewed-by: Samuel Thibault <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/accessibility/speakup/speakup_audptr.c

···
 static int synth_probe(struct spk_synth *synth);
 static void synth_flush(struct spk_synth *synth);
 
-static struct var_t vars[] = {
-	{ CAPS_START, .u.s = {"\x05[f99]" } },
-	{ CAPS_STOP, .u.s = {"\x05[f80]" } },
-	{ RATE, .u.n = {"\x05[r%d]", 10, 0, 20, 100, -10, NULL } },
-	{ PITCH, .u.n = {"\x05[f%d]", 80, 39, 4500, 0, 0, NULL } },
-	{ VOL, .u.n = {"\x05[g%d]", 21, 0, 40, 0, 0, NULL } },
-	{ TONE, .u.n = {"\x05[s%d]", 9, 0, 63, 0, 0, NULL } },
-	{ PUNCT, .u.n = {"\x05[A%c]", 0, 0, 3, 0, 0, "nmsa" } },
-	{ DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
+
+enum default_vars_id {
+	CAPS_START_ID = 0, CAPS_STOP_ID,
+	RATE_ID, PITCH_ID,
+	VOL_ID, TONE_ID, PUNCT_ID,
+	DIRECT_ID, V_LAST_VAR_ID,
+	NB_ID
+};
+
+static struct var_t vars[NB_ID] = {
+	[CAPS_START_ID] = { CAPS_START, .u.s = {"\x05[f99]" } },
+	[CAPS_STOP_ID] = { CAPS_STOP, .u.s = {"\x05[f80]" } },
+	[RATE_ID] = { RATE, .u.n = {"\x05[r%d]", 10, 0, 20, 100, -10, NULL } },
+	[PITCH_ID] = { PITCH, .u.n = {"\x05[f%d]", 80, 39, 4500, 0, 0, NULL } },
+	[VOL_ID] = { VOL, .u.n = {"\x05[g%d]", 21, 0, 40, 0, 0, NULL } },
+	[TONE_ID] = { TONE, .u.n = {"\x05[s%d]", 9, 0, 63, 0, 0, NULL } },
+	[PUNCT_ID] = { PUNCT, .u.n = {"\x05[A%c]", 0, 0, 3, 0, 0, "nmsa" } },
+	[DIRECT_ID] = { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
 	V_LAST_VAR
 };
 
···
 module_param_named(ser, synth_audptr.ser, int, 0444);
 module_param_named(dev, synth_audptr.dev_name, charp, 0444);
 module_param_named(start, synth_audptr.startup, short, 0444);
+module_param_named(rate, vars[RATE_ID].u.n.default_val, int, 0444);
+module_param_named(pitch, vars[PITCH_ID].u.n.default_val, int, 0444);
+module_param_named(vol, vars[VOL_ID].u.n.default_val, int, 0444);
+module_param_named(tone, vars[TONE_ID].u.n.default_val, int, 0444);
+module_param_named(punct, vars[PUNCT_ID].u.n.default_val, int, 0444);
+module_param_named(direct, vars[DIRECT_ID].u.n.default_val, int, 0444);
+
+
 
 MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
 MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer.");
 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
+MODULE_PARM_DESC(rate, "Set the rate variable on load.");
+MODULE_PARM_DESC(pitch, "Set the pitch variable on load.");
+MODULE_PARM_DESC(vol, "Set the vol variable on load.");
+MODULE_PARM_DESC(tone, "Set the tone variable on load.");
+MODULE_PARM_DESC(punct, "Set the punct variable on load.");
+MODULE_PARM_DESC(direct, "Set the direct variable on load.");
+
 
 module_spk_synth(synth_audptr);