x86/platform/intel/pmc_atom: Supply register mappings via PMC object

The patch converts the functions to use the register mappings
provided by PMC object. It would help in case of mappings on
different platforms.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Aubrey Li <aubrey.li@linux.intel.com>
Cc: Rafael J . Wysocki <rafael.j.wysocki@intel.com>
Cc: Kumar P Mahesh <mahesh.kumar.p@intel.com>
Link: http://lkml.kernel.org/r/1436192944-56496-4-git-send-email-andriy.shevchenko@linux.intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

arch/x86/kernel/pmc_atom.c

@@ -25,9 +25,20 @@
 
 #include <asm/pmc_atom.h>
 
+struct pmc_bit_map {
+	const char *name;
+	u32 bit_mask;
+};
+
+struct pmc_reg_map {
+	const struct pmc_bit_map *dev;
+	const struct pmc_bit_map *pss;
+};
+
 struct pmc_dev {
 	u32 base_addr;
 	void __iomem *regmap;
+	const struct pmc_reg_map *map;
 #ifdef CONFIG_DEBUG_FS
 	struct dentry *dbgfs_dir;
 #endif /* CONFIG_DEBUG_FS */
@@ -37,11 +48,6 @@ struct pmc_dev {
 static struct pmc_dev pmc_device;
 static u32 acpi_base_addr;
 
-struct pmc_bit_map {
-	const char *name;
-	u32 bit_mask;
-};
-
 static const struct pmc_bit_map dev_map[] = {
 	{"LPSS1_F0_DMA",	BIT_LPSS1_F0_DMA},
 	{"LPSS1_F1_PWM1",	BIT_LPSS1_F1_PWM1},
@@ -104,6 +110,11 @@ static const struct pmc_bit_map pss_map[] = {
 	{},
 };
 
+static const struct pmc_reg_map reg_map = {
+	.dev		= dev_map,
+	.pss		= pss_map,
+};
+
 static inline u32 pmc_reg_read(struct pmc_dev *pmc, int reg_offset)
 {
 	return readl(pmc->regmap + reg_offset);
@@ -172,17 +183,18 @@ static void pmc_hw_reg_setup(struct pmc_dev *pmc)
 static int pmc_dev_state_show(struct seq_file *s, void *unused)
 {
 	struct pmc_dev *pmc = s->private;
+	const struct pmc_bit_map *map = pmc->map->dev;
 	u32 func_dis, func_dis_2, func_dis_index;
 	u32 d3_sts_0, d3_sts_1, d3_sts_index;
-	int dev_index, reg_index;
+	int index, reg_index;
 
 	func_dis = pmc_reg_read(pmc, PMC_FUNC_DIS);
 	func_dis_2 = pmc_reg_read(pmc, PMC_FUNC_DIS_2);
 	d3_sts_0 = pmc_reg_read(pmc, PMC_D3_STS_0);
 	d3_sts_1 = pmc_reg_read(pmc, PMC_D3_STS_1);
 
-	for (dev_index = 0; dev_map[dev_index].name; dev_index++) {
-		reg_index = dev_index / PMC_REG_BIT_WIDTH;
+	for (index = 0; map[index].name; index++) {
+		reg_index = index / PMC_REG_BIT_WIDTH;
 		if (reg_index) {
 			func_dis_index = func_dis_2;
 			d3_sts_index = d3_sts_1;
@@ -192,10 +204,10 @@ static int pmc_dev_state_show(struct seq_file *s, void *unused)
 		}
 
 		seq_printf(s, "Dev: %-2d - %-32s\tState: %s [%s]\n",
-			dev_index, dev_map[dev_index].name,
-			dev_map[dev_index].bit_mask & func_dis_index ?
+			index, map[index].name,
+			map[index].bit_mask & func_dis_index ?
 			"Disabled" : "Enabled ",
-			dev_map[dev_index].bit_mask & d3_sts_index ?
+			map[index].bit_mask & d3_sts_index ?
 			"D3" : "D0");
 	}
 	return 0;
@@ -216,13 +228,14 @@ static const struct file_operations pmc_dev_state_ops = {
 static int pmc_pss_state_show(struct seq_file *s, void *unused)
 {
 	struct pmc_dev *pmc = s->private;
+	const struct pmc_bit_map *map = pmc->map->pss;
 	u32 pss = pmc_reg_read(pmc, PMC_PSS);
-	int pss_index;
+	int index;
 
-	for (pss_index = 0; pss_map[pss_index].name; pss_index++) {
+	for (index = 0; map[index].name; index++) {
 		seq_printf(s, "Island: %-2d - %-32s\tState: %s\n",
-			pss_index, pss_map[pss_index].name,
-			pss_map[pss_index].bit_mask & pss ? "Off" : "On");
+			index, map[index].name,
+			map[index].bit_mask & pss ? "Off" : "On");
 	}
 	return 0;
 }
@@ -312,7 +325,7 @@ static int pmc_dbgfs_register(struct pmc_dev *pmc)
 }
 #endif /* CONFIG_DEBUG_FS */
 
-static int pmc_setup_dev(struct pci_dev *pdev)
+static int pmc_setup_dev(struct pci_dev *pdev, const struct pmc_reg_map *map)
 {
 	struct pmc_dev *pmc = &pmc_device;
 	int ret;
@@ -334,6 +347,8 @@ static int pmc_setup_dev(struct pci_dev *pdev)
 		return -ENOMEM;
 	}
 
+	pmc->map = map;
+
 	/* PMC hardware registers setup */
 	pmc_hw_reg_setup(pmc);
 
@@ -376,7 +391,7 @@ static int __init pmc_atom_init(void)
 	for_each_pci_dev(pdev) {
 		ent = pci_match_id(pmc_pci_ids, pdev);
 		if (ent)
-			return pmc_setup_dev(pdev);
+			return pmc_setup_dev(pdev, &reg_map);
 	}
 	/* Device not found. */
 	return -ENODEV;