[PATCH RFC 3/4] memory: renesas-rpc-if: Add support for overriding IO fixed values

From: Biju Das <biju.das.jz@bp.renesas.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Biju Das <biju.das.jz@bp.renesas.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>,
	Mark Brown <broonie@kernel.org>,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	Michael Walle <michael@walle.cc>,
	Biju Das <biju.das.au@gmail.com>,
	linux-renesas-soc@vger.kernel.org
Subject: [PATCH RFC 3/4] memory: renesas-rpc-if: Add support for overriding IO fixed values
Date: Wed,  8 Nov 2023 17:11:48 +0000	[thread overview]
Message-ID: <20231108171149.258656-4-biju.das.jz@bp.renesas.com> (raw)
In-Reply-To: <20231108171149.258656-1-biju.das.jz@bp.renesas.com>

Add support for overriding IO fixed values to control the pin state
based on the flash type.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
 drivers/memory/renesas-rpc-if.c | 20 ++++++++++++++++++++
 include/memory/renesas-rpc-if.h |  1 +
 2 files changed, 21 insertions(+)

diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-if.c
index 9695b2d3ae59..17bc604cdfff 100644
--- a/drivers/memory/renesas-rpc-if.c
+++ b/drivers/memory/renesas-rpc-if.c
@@ -325,6 +325,26 @@ static void rpcif_rzg2l_timing_adjust_sdr(struct rpcif_priv *rpc)
 	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000032);
 }
 
+int rpcif_set_iofv(struct device *dev, u32 val)
+{
+	struct rpcif_priv *rpc = dev_get_drvdata(dev);
+	int ret;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		return ret;
+
+	regmap_update_bits(rpc->regmap, RPCIF_CMNCR, RPCIF_CMNCR_IOFV(3),
+			   RPCIF_CMNCR_IO0FV(val & 0x3) |
+			   RPCIF_CMNCR_IO2FV((val >> 4) & 0x3) |
+			   RPCIF_CMNCR_IO3FV((val >> 6) & 0x3));
+
+	pm_runtime_put(dev);
+
+	return 0;
+}
+EXPORT_SYMBOL(rpcif_set_iofv);
+
 int rpcif_hw_init(struct device *dev, bool hyperflash)
 {
 	struct rpcif_priv *rpc = dev_get_drvdata(dev);
diff --git a/include/memory/renesas-rpc-if.h b/include/memory/renesas-rpc-if.h
index b8fa30fd6b50..124ca9c16a39 100644
--- a/include/memory/renesas-rpc-if.h
+++ b/include/memory/renesas-rpc-if.h
@@ -71,6 +71,7 @@ struct rpcif {
 
 int rpcif_sw_init(struct rpcif *rpc, struct device *dev);
 int rpcif_hw_init(struct device *dev, bool hyperflash);
+int rpcif_set_iofv(struct device *dev, u32 val);
 void rpcif_prepare(struct device *dev, const struct rpcif_op *op, u64 *offs,
 		   size_t *len);
 int rpcif_manual_xfer(struct device *dev);
-- 
2.25.1

