[PATCH 3/8] nvmem: rockchip-otp: Add clocks and reg_read to rockchip_data

Cristian Ciocaltea
2023-05-01T08:44:26Z

In preparation to support new Rockchip OTP memory devices with different
clock configurations and register layout, extend rockchip_data struct
with the related members: clocks, num_clks, reg_read.

Additionally, to avoid managing redundant driver data, drop num_clks
member from rockchip_otp struct and update all references to point to
the equivalent member in rockchip_data.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
---
drivers/nvmem/rockchip-otp.c | 79 ++++++++++++++++++++++--------------
1 file changed, 49 insertions(+), 30 deletions(-)

diff --git a/drivers/nvmem/rockchip-otp.c b/drivers/nvmem/rockchip-otp.c
index 9f53bcce2f87..a5b234e60735 100644
--- a/drivers/nvmem/rockchip-otp.c
+++ b/drivers/nvmem/rockchip-otp.c
@@ -54,21 +54,19 @@

#define OTPC_TIMEOUT 10000

+struct rockchip_data {
+ int size;
+ const char * const *clocks;
+ int num_clks;
+ nvmem_reg_read_t reg_read;
+};
+
struct rockchip_otp {
struct device *dev;
void __iomem *base;
- struct clk_bulk_data *clks;
- int num_clks;
+ struct clk_bulk_data *clks;
struct reset_control *rst;
-};
-
-/* list of required clocks */
-static const char * const rockchip_otp_clocks[] = {
- "otp", "apb_pclk", "phy",
-};
-
-struct rockchip_data {
- int size;
+ const struct rockchip_data *data;
};

static int rockchip_otp_reset(struct rockchip_otp *otp)
@@ -132,29 +130,23 @@ static int rockchip_otp_ecc_enable(struct rockchip_otp *otp, bool enable)
return ret;
}

-static int rockchip_otp_read(void *context, unsigned int offset,
- void *val, size_t bytes)
+static int px30_otp_read(void *context, unsigned int offset,
+ void *val, size_t bytes)
{
struct rockchip_otp *otp = context;
u8 *buf = val;
- int ret = 0;
-
- ret = clk_bulk_prepare_enable(otp->num_clks, otp->clks);
- if (ret < 0) {
- dev_err(otp->dev, "failed to prepare/enable clks\n");
- return ret;
- }
+ int ret;

ret = rockchip_otp_reset(otp);
if (ret) {
dev_err(otp->dev, "failed to reset otp phy\n");
- goto disable_clks;
+ return ret;
}

ret = rockchip_otp_ecc_enable(otp, false);
if (ret < 0) {
dev_err(otp->dev, "rockchip_otp_ecc_enable err\n");
- goto disable_clks;
+ return ret;
}

writel(OTPC_USE_USER | OTPC_USE_USER_MASK, otp->base + OTPC_USER_CTRL);
@@ -174,8 +166,28 @@ static int rockchip_otp_read(void *context, unsigned int offset,

read_end:
writel(0x0 | OTPC_USE_USER_MASK, otp->base + OTPC_USER_CTRL);
-disable_clks:
- clk_bulk_disable_unprepare(otp->num_clks, otp->clks);
+
+ return ret;
+}
+
+static int rockchip_otp_read(void *context, unsigned int offset,
+ void *val, size_t bytes)
+{
+ struct rockchip_otp *otp = context;
+ int ret;
+
+ if (!otp->data || !otp->data->reg_read)
+ return -EINVAL;
+
+ ret = clk_bulk_prepare_enable(otp->data->num_clks, otp->clks);
+ if (ret < 0) {
+ dev_err(otp->dev, "failed to prepare/enable clks\n");
+ return ret;
+ }
+
+ ret = otp->data->reg_read(context, offset, val, bytes);
+
+ clk_bulk_disable_unprepare(otp->data->num_clks, otp->clks);

return ret;
}
@@ -189,8 +201,15 @@ static struct nvmem_config otp_config = {
.reg_read = rockchip_otp_read,
};

+static const char * const px30_otp_clocks[] = {
+ "otp", "apb_pclk", "phy",
+};
+
static const struct rockchip_data px30_data = {
.size = 0x40,
+ .clocks = px30_otp_clocks,
+ .num_clks = ARRAY_SIZE(px30_otp_clocks),
+ .reg_read = px30_otp_read,
};

static const struct of_device_id rockchip_otp_match[] = {
@@ -225,21 +244,21 @@ static int rockchip_otp_probe(struct platform_device *pdev)
if (!otp)
return -ENOMEM;

+ otp->data = data;
otp->dev = dev;
otp->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(otp->base))
return PTR_ERR(otp->base);

- otp->num_clks = ARRAY_SIZE(rockchip_otp_clocks);
- otp->clks = devm_kcalloc(dev, otp->num_clks,
- sizeof(*otp->clks), GFP_KERNEL);
+ otp->clks = devm_kcalloc(dev, data->num_clks, sizeof(*otp->clks),
+ GFP_KERNEL);
if (!otp->clks)
return -ENOMEM;

- for (i = 0; i < otp->num_clks; ++i)
- otp->clks[i].id = rockchip_otp_clocks[i];
+ for (i = 0; i < data->num_clks; ++i)
+ otp->clks[i].id = data->clocks[i];

- ret = devm_clk_bulk_get(dev, otp->num_clks, otp->clks);
+ ret = devm_clk_bulk_get(dev, data->num_clks, otp->clks);
if (ret)
return ret;

--
2.40.0