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Subject[PATCH v2 06/29] soc: realtek: chip: Detect RTD1296
Date
Detection logic from downstream drivers/soc/realtek/rtd129x/rtk_chip.c.

Acked-by: James Tai <james.tai@realtek.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
TODO: Name the bit in ISO_CHIP_INFO1:bound_opts.

v1 -> v2:
* Instead of direct iso register access use the new syscon regmap

drivers/soc/realtek/chip.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/realtek/chip.c b/drivers/soc/realtek/chip.c
index c4650d512c91..103f564aad7f 100644
--- a/drivers/soc/realtek/chip.c
+++ b/drivers/soc/realtek/chip.c
@@ -23,6 +23,8 @@

#define SB2_CHIP_INFO_REVISE_ID GENMASK(31, 16)

+#define REG_ISO_CHIP_INFO1 0x028
+
struct dhc_soc_revision {
const char *name;
u16 chip_rev;
@@ -57,9 +59,32 @@ static const char *default_name(struct device *dev, const struct dhc_soc *s)
return s->family;
}

+static const char *rtd1295_name(struct device *dev, const struct dhc_soc *s)
+{
+ struct regmap *regmap;
+ unsigned int val;
+ int ret;
+
+ regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "iso-syscon");
+ if (IS_ERR(regmap)) {
+ ret = PTR_ERR(regmap);
+ if (ret == -EPROBE_DEFER)
+ return ERR_PTR(ret);
+ dev_warn(dev, "Could not check iso (%d)\n", ret);
+ } else {
+ ret = regmap_read(regmap, REG_ISO_CHIP_INFO1, &val);
+ if (ret)
+ dev_warn(dev, "Could not read chip_info1 (%d)\n", ret);
+ else if (val & BIT(11))
+ return "RTD1296";
+ }
+
+ return "RTD1295";
+}
+
static const struct dhc_soc dhc_soc_families[] = {
{ 0x6329, "RTD1195", default_name, rtd1195_revisions, "Phoenix" },
- { 0x6421, "RTD1295", default_name, rtd1295_revisions, "Kylin" },
+ { 0x6421, "RTD1295", rtd1295_name, rtd1295_revisions, "Kylin" },
};

static const struct dhc_soc *dhc_soc_by_chip_id(u16 chip_id)
--
2.26.2
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