[PATCH V3 3/4] gpio: eic-sprd: Modify the calculation method of eic number

[Wenhua Lin <Wenhua.Lin@unisoc.com>]

When the soc changes, the corresponding gpio-eic-sprd.c
code needs to be modified, and the corresponding
Document must also be modified, which is quite troublesome.
To avoid modifying the driver file, the number of eics
is automatically calculated by matching dts nodes.

Signed-off-by: Wenhua Lin <Wenhua.Lin@unisoc.com>
---
 drivers/gpio/gpio-eic-sprd.c | 45 ++++++++++++++++++------------------
 1 file changed, 23 insertions(+), 22 deletions(-)

diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index e492157e5154..1ca3c444957c 100644
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -109,34 +109,32 @@ static struct sprd_eic *to_sprd_eic(struct notifier_block *nb)
 
 struct sprd_eic_variant_data {
 	enum sprd_eic_type type;
-	u32 num_eics;
 };
 
+#define SPRD_EIC_VAR_DATA(soc_name)						\
+static const struct sprd_eic_variant_data soc_name##_eic_dbnc_data = {		\
+	.type = SPRD_EIC_DEBOUNCE,						\
+};										\
+										\
+static const struct sprd_eic_variant_data soc_name##_eic_latch_data = {	\
+	.type = SPRD_EIC_LATCH,							\
+};										\
+										\
+static const struct sprd_eic_variant_data soc_name##_eic_async_data = {	\
+	.type = SPRD_EIC_ASYNC,							\
+};										\
+										\
+static const struct sprd_eic_variant_data soc_name##_eic_sync_data = {		\
+	.type = SPRD_EIC_SYNC,							\
+}
+
+SPRD_EIC_VAR_DATA(sc9860);
+
 static const char *sprd_eic_label_name[SPRD_EIC_MAX] = {
 	"eic-debounce", "eic-latch", "eic-async",
 	"eic-sync",
 };
 
-static const struct sprd_eic_variant_data sc9860_eic_dbnc_data = {
-	.type = SPRD_EIC_DEBOUNCE,
-	.num_eics = 8,
-};
-
-static const struct sprd_eic_variant_data sc9860_eic_latch_data = {
-	.type = SPRD_EIC_LATCH,
-	.num_eics = 8,
-};
-
-static const struct sprd_eic_variant_data sc9860_eic_async_data = {
-	.type = SPRD_EIC_ASYNC,
-	.num_eics = 8,
-};
-
-static const struct sprd_eic_variant_data sc9860_eic_sync_data = {
-	.type = SPRD_EIC_SYNC,
-	.num_eics = 8,
-};
-
 static inline void __iomem *sprd_eic_offset_base(struct sprd_eic *sprd_eic,
 						 unsigned int bank)
 {
@@ -607,6 +605,7 @@ static int sprd_eic_probe(struct platform_device *pdev)
 	struct gpio_irq_chip *irq;
 	struct sprd_eic *sprd_eic;
 	struct resource *res;
+	u16 num_banks = 0;
 	int ret, i;
 
 	pdata = of_device_get_match_data(dev);
@@ -640,10 +639,12 @@ static int sprd_eic_probe(struct platform_device *pdev)
 		sprd_eic->base[i] = devm_ioremap_resource(dev, res);
 		if (IS_ERR(sprd_eic->base[i]))
 			return PTR_ERR(sprd_eic->base[i]);
+
+		num_banks++;
 	}
 
 	sprd_eic->chip.label = sprd_eic_label_name[sprd_eic->type];
-	sprd_eic->chip.ngpio = pdata->num_eics;
+	sprd_eic->chip.ngpio = num_banks * SPRD_EIC_PER_BANK_NR;
 	sprd_eic->chip.base = -1;
 	sprd_eic->chip.parent = dev;
 	sprd_eic->chip.direction_input = sprd_eic_direction_input;
-- 
2.17.1