media: hantro: allow arbitrary number of clocks

Dynamically allocate clocks and move clock names out of struct
hantro_variant. This lifts the four clock limit and allows to use
ARRAY_SIZE() to fill .num_clocks to reduce the risk of mismatches.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/staging/media/hantro/hantro.h

@@ -25,8 +25,6 @@
 
 #include "hantro_hw.h"
 
-#define HANTRO_MAX_CLOCKS		4
-
 #define MPEG2_MB_DIM			16
 #define MPEG2_MB_WIDTH(w)		DIV_ROUND_UP(w, MPEG2_MB_DIM)
 #define MPEG2_MB_HEIGHT(h)		DIV_ROUND_UP(h, MPEG2_MB_DIM)
@@ -88,7 +86,7 @@ struct hantro_variant {
 	int (*runtime_resume)(struct hantro_dev *vpu);
 	const struct hantro_irq *irqs;
 	int num_irqs;
-	const char *clk_names[HANTRO_MAX_CLOCKS];
+	const char * const *clk_names;
 	int num_clocks;
 	const char * const *reg_names;
 	int num_regs;
@@ -182,7 +180,7 @@ struct hantro_dev {
 	struct hantro_func *decoder;
 	struct platform_device *pdev;
 	struct device *dev;
-	struct clk_bulk_data clocks[HANTRO_MAX_CLOCKS];
+	struct clk_bulk_data *clocks;
 	void __iomem **reg_bases;
 	void __iomem *enc_base;
 	void __iomem *dec_base;

drivers/staging/media/hantro/hantro_drv.c

@@ -687,6 +687,11 @@ static int hantro_probe(struct platform_device *pdev)
 
 	INIT_DELAYED_WORK(&vpu->watchdog_work, hantro_watchdog);
 
+	vpu->clocks = devm_kcalloc(&pdev->dev, vpu->variant->num_clocks,
+				   sizeof(*vpu->clocks), GFP_KERNEL);
+	if (!vpu->clocks)
+		return -ENOMEM;
+
 	for (i = 0; i < vpu->variant->num_clocks; i++)
 		vpu->clocks[i].id = vpu->variant->clk_names[i];
 	ret = devm_clk_bulk_get(&pdev->dev, vpu->variant->num_clocks,

drivers/staging/media/hantro/rk3288_vpu_hw.c

@@ -166,6 +166,10 @@ static const struct hantro_irq rk3288_irqs[] = {
 	{ "vdpu", rk3288_vdpu_irq },
 };
 
+static const char * const rk3288_clk_names[] = {
+	"aclk", "hclk"
+};
+
 const struct hantro_variant rk3288_vpu_variant = {
 	.enc_offset = 0x0,
 	.enc_fmts = rk3288_vpu_enc_fmts,
@@ -178,6 +182,6 @@ const struct hantro_variant rk3288_vpu_variant = {
 	.irqs = rk3288_irqs,
 	.num_irqs = ARRAY_SIZE(rk3288_irqs),
 	.init = rk3288_vpu_hw_init,
-	.clk_names = {"aclk", "hclk"},
-	.num_clocks = 2
+	.clk_names = rk3288_clk_names,
+	.num_clocks = ARRAY_SIZE(rk3288_clk_names)
 };

drivers/staging/media/hantro/rk3399_vpu_hw.c

@@ -165,6 +165,10 @@ static const struct hantro_irq rk3399_irqs[] = {
 	{ "vdpu", rk3399_vdpu_irq },
 };
 
+static const char * const rk3399_clk_names[] = {
+	"aclk", "hclk"
+};
+
 const struct hantro_variant rk3399_vpu_variant = {
 	.enc_offset = 0x0,
 	.enc_fmts = rk3399_vpu_enc_fmts,
@@ -177,6 +181,6 @@ const struct hantro_variant rk3399_vpu_variant = {
 	.irqs = rk3399_irqs,
 	.num_irqs = ARRAY_SIZE(rk3399_irqs),
 	.init = rk3399_vpu_hw_init,
-	.clk_names = {"aclk", "hclk"},
-	.num_clocks = 2
+	.clk_names = rk3399_clk_names,
+	.num_clocks = ARRAY_SIZE(rk3399_clk_names)
 };