cpu/intel/speedstep: Constify get_cst_entries()

Make the `get_cst_entries()` function provide a read-only pointer. Also,
constify the actual data where applicable.

Change-Id: Ib22b3e37b086a95af770465a45222e9b84202e54
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58393
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/cpu/intel/speedstep/acpi.c

@@ -88,7 +88,7 @@ void generate_cpu_entries(const struct device *device)
 						       CPUs share the same
 						       layout. */
 	int num_cstates;
-	acpi_cstate_t *cstates;
+	const acpi_cstate_t *cstates;
 	sst_table_t pstates;
 	uint8_t coordination;
 

src/include/acpi/acpigen.h

@@ -499,7 +499,7 @@ void acpigen_write_field(const char *name, const struct fieldlist *l, size_t cou
 void acpigen_write_indexfield(const char *idx, const char *data,
 			      struct fieldlist *l, size_t count, uint8_t flags);
 
-int get_cst_entries(acpi_cstate_t **);
+int get_cst_entries(const acpi_cstate_t **);
 
 /*
  * Get element from package into specified destination op:

src/mainboard/acer/g43t-am3/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/apple/macbook21/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-static acpi_cstate_t cst_entries[] = {
+static const acpi_cstate_t cst_entries[] = {
 	{
 		.ctype = 1,
 		.latency = 1,
@@ -31,7 +31,7 @@ static acpi_cstate_t cst_entries[] = {
 	},
 };
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	*entries = cst_entries;
 	return ARRAY_SIZE(cst_entries);

src/mainboard/asrock/g41c-gs/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/asus/p5gc-mx/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/asus/p5qc/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/asus/p5ql-em/cstates.c

@@ -3,7 +3,7 @@
 #include <acpi/acpigen.h>
 
 /* TODO: Could work... */
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/asus/p5qpl-am/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/foxconn/d41s/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/foxconn/g41s-k/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/getac/p470/cstates.c

@@ -3,7 +3,7 @@
 #include <acpi/acpigen.h>
 #include <southbridge/intel/i82801gx/i82801gx.h>
 
-static acpi_cstate_t cst_entries[] = {
+static const acpi_cstate_t cst_entries[] = {
 	{
 		/* ACPI C1 / CPU C1 */
 		1, 0x01, 1000,
@@ -21,7 +21,7 @@ static acpi_cstate_t cst_entries[] = {
 	},
 };
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	*entries = cst_entries;
 	return ARRAY_SIZE(cst_entries);

src/mainboard/gigabyte/ga-945gcm-s2l/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/gigabyte/ga-d510ud/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/gigabyte/ga-g41m-es2l/cstates.c

@@ -2,9 +2,9 @@
 
 #include <acpi/acpigen.h>
 
-static acpi_cstate_t cst_entries[] = {};
+static const acpi_cstate_t cst_entries[] = {};
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	*entries = cst_entries;
 	return ARRAY_SIZE(cst_entries);

src/mainboard/ibase/mb899/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/intel/d510mo/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/intel/d945gclf/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/intel/dg41wv/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/intel/dg43gt/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/kontron/986lcd-m/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/lenovo/t400/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-static acpi_cstate_t cst_entries[] = {
+static const acpi_cstate_t cst_entries[] = {
 	{
 		/* ACPI C1 / CPU C1 */
 		1, 0x01, 1000,
@@ -20,7 +20,7 @@ static acpi_cstate_t cst_entries[] = {
 	},
 };
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	*entries = cst_entries;
 	return ARRAY_SIZE(cst_entries);

src/mainboard/lenovo/t60/cstates.c

@@ -3,13 +3,13 @@
 #include <acpi/acpigen.h>
 #include <southbridge/intel/i82801gx/i82801gx.h>
 
-static acpi_cstate_t cst_entries[] = {
+static const acpi_cstate_t cst_entries[] = {
 	{ 1,  1, 1000, { 0x7f, 1, 2, 0, 1, 0 } },
 	{ 2,  1,  500, { 0x01, 8, 0, 0, DEFAULT_PMBASE + LV2, 0 } },
 	{ 3, 17,  250, { 0x01, 8, 0, 0, DEFAULT_PMBASE + LV3, 0 } },
 };
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	*entries = cst_entries;
 	return ARRAY_SIZE(cst_entries);

src/mainboard/lenovo/thinkcentre_a58/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/lenovo/x200/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-static acpi_cstate_t cst_entries[] = {
+static const acpi_cstate_t cst_entries[] = {
 	{
 		/* ACPI C1 / CPU C1 */
 		1, 0x01, 1000,
@@ -20,7 +20,7 @@ static acpi_cstate_t cst_entries[] = {
 	},
 };
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	*entries = cst_entries;
 	return ARRAY_SIZE(cst_entries);

src/mainboard/lenovo/x60/cstates.c

@@ -13,7 +13,7 @@
 		.addrh = 0,					\
 	}
 
-static acpi_cstate_t cst_entries[] = {
+static const acpi_cstate_t cst_entries[] = {
 	{
 		.ctype = 1,
 		.latency = 1,
@@ -34,7 +34,7 @@ static acpi_cstate_t cst_entries[] = {
 	},
 };
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	*entries = cst_entries;
 	return ARRAY_SIZE(cst_entries);

src/mainboard/roda/rk886ex/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	return 0;
 }

src/mainboard/roda/rk9/cstates.c

@@ -2,7 +2,7 @@
 
 #include <acpi/acpigen.h>
 
-static acpi_cstate_t cst_entries[] = {
+static const acpi_cstate_t cst_entries[] = {
 	{
 		/* ACPI C1 / CPU C1 */
 		1, 0x01, 1000,
@@ -15,7 +15,7 @@ static acpi_cstate_t cst_entries[] = {
 	},
 };
 
-int get_cst_entries(acpi_cstate_t **entries)
+int get_cst_entries(const acpi_cstate_t **entries)
 {
 	*entries = cst_entries;
 	return ARRAY_SIZE(cst_entries);