linux-kernel - [PATCH] mtd: spi-nor: Allow post

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Message-Id: <20230405060751.49056-1-tudor.ambarus@linaro.org>
Date:   Wed,  5 Apr 2023 09:07:51 +0300
From:   Tudor Ambarus <tudor.ambarus@...aro.org>
To:     tkuw584924@...il.com, Takahiro.Kuwano@...ineon.com,
        pratyush@...nel.org, michael@...le.cc
Cc:     bacem.daassi@...ineon.com, miquel.raynal@...tlin.com,
        richard@....at, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [PATCH] mtd: spi-nor: Allow post_sfdp hook to return errors

Multi die flashes like s25hl02gt need to determine the page_size at
run-time by querying a configuration register for each die. Since the
number of dice is determined in an optional SFDP table, SCCR MC, the
page size configuration must be done in the post_sfdp hook. Allow
post_sfdp to return errors, as reading the configuration register might
return errors.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
 drivers/mtd/spi-nor/core.h      |  2 +-
 drivers/mtd/spi-nor/micron-st.c |  4 +++-
 drivers/mtd/spi-nor/sfdp.c      | 10 ++++++----
 drivers/mtd/spi-nor/spansion.c  | 12 +++++++++---
 4 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index 8cfa82ed06c7..a9e5e091547d 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -426,7 +426,7 @@ struct spi_nor_fixups {
 	int (*post_bfpt)(struct spi_nor *nor,
 			 const struct sfdp_parameter_header *bfpt_header,
 			 const struct sfdp_bfpt *bfpt);
-	void (*post_sfdp)(struct spi_nor *nor);
+	int (*post_sfdp)(struct spi_nor *nor);
 	void (*late_init)(struct spi_nor *nor);
 };
 
diff --git a/drivers/mtd/spi-nor/micron-st.c b/drivers/mtd/spi-nor/micron-st.c
index a6f080112a51..4b919756a205 100644
--- a/drivers/mtd/spi-nor/micron-st.c
+++ b/drivers/mtd/spi-nor/micron-st.c
@@ -131,7 +131,7 @@ static void mt35xu512aba_default_init(struct spi_nor *nor)
 	nor->params->octal_dtr_enable = micron_st_nor_octal_dtr_enable;
 }
 
-static void mt35xu512aba_post_sfdp_fixup(struct spi_nor *nor)
+static int mt35xu512aba_post_sfdp_fixup(struct spi_nor *nor)
 {
 	/* Set the Fast Read settings. */
 	nor->params->hwcaps.mask |= SNOR_HWCAPS_READ_8_8_8_DTR;
@@ -149,6 +149,8 @@ static void mt35xu512aba_post_sfdp_fixup(struct spi_nor *nor)
 	 * disable it.
 	 */
 	nor->params->quad_enable = NULL;
+
+	return 0;
 }
 
 static const struct spi_nor_fixups mt35xu512aba_fixups = {
diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c
index 69e47c9778a2..e501686a6dc3 100644
--- a/drivers/mtd/spi-nor/sfdp.c
+++ b/drivers/mtd/spi-nor/sfdp.c
@@ -1260,14 +1260,16 @@ static int spi_nor_parse_sccr(struct spi_nor *nor,
  * Used to tweak various flash parameters when information provided by the SFDP
  * tables are wrong.
  */
-static void spi_nor_post_sfdp_fixups(struct spi_nor *nor)
+static int spi_nor_post_sfdp_fixups(struct spi_nor *nor)
 {
 	if (nor->manufacturer && nor->manufacturer->fixups &&
 	    nor->manufacturer->fixups->post_sfdp)
-		nor->manufacturer->fixups->post_sfdp(nor);
+		return nor->manufacturer->fixups->post_sfdp(nor);
 
 	if (nor->info->fixups && nor->info->fixups->post_sfdp)
-		nor->info->fixups->post_sfdp(nor);
+		return nor->info->fixups->post_sfdp(nor);
+
+	return 0;
 }
 
 /**
@@ -1477,7 +1479,7 @@ int spi_nor_parse_sfdp(struct spi_nor *nor)
 		}
 	}
 
-	spi_nor_post_sfdp_fixups(nor);
+	err = spi_nor_post_sfdp_fixups(nor);
 exit:
 	kfree(param_headers);
 	return err;
diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c
index c937f0ac61de..519fdad79a19 100644
--- a/drivers/mtd/spi-nor/spansion.c
+++ b/drivers/mtd/spi-nor/spansion.c
@@ -370,7 +370,7 @@ s25fs256t_post_bfpt_fixup(struct spi_nor *nor,
 	return cypress_nor_get_page_size(nor);
 }
 
-static void s25fs256t_post_sfdp_fixup(struct spi_nor *nor)
+static int s25fs256t_post_sfdp_fixup(struct spi_nor *nor)
 {
 	struct spi_nor_flash_parameter *params = nor->params;
 
@@ -379,6 +379,8 @@ static void s25fs256t_post_sfdp_fixup(struct spi_nor *nor)
 	spi_nor_set_pp_settings(&params->page_programs[SNOR_CMD_PP_1_1_4],
 				SPINOR_OP_PP_1_1_4_4B,
 				SNOR_PROTO_1_1_4);
+
+	return 0;
 }
 
 static void s25fs256t_late_init(struct spi_nor *nor)
@@ -409,7 +411,7 @@ s25hx_t_post_bfpt_fixup(struct spi_nor *nor,
 	return cypress_nor_get_page_size(nor);
 }
 
-static void s25hx_t_post_sfdp_fixup(struct spi_nor *nor)
+static int s25hx_t_post_sfdp_fixup(struct spi_nor *nor)
 {
 	struct spi_nor_erase_type *erase_type =
 					nor->params->erase_map.erase_type;
@@ -431,6 +433,8 @@ static void s25hx_t_post_sfdp_fixup(struct spi_nor *nor)
 			break;
 		}
 	}
+
+	return 0;
 }
 
 static void s25hx_t_late_init(struct spi_nor *nor)
@@ -463,7 +467,7 @@ static int cypress_nor_octal_dtr_enable(struct spi_nor *nor, bool enable)
 			cypress_nor_octal_dtr_dis(nor);
 }
 
-static void s28hx_t_post_sfdp_fixup(struct spi_nor *nor)
+static int s28hx_t_post_sfdp_fixup(struct spi_nor *nor)
 {
 	/*
 	 * On older versions of the flash the xSPI Profile 1.0 table has the
@@ -489,6 +493,8 @@ static void s28hx_t_post_sfdp_fixup(struct spi_nor *nor)
 	 * actual value for that is 4.
 	 */
 	nor->params->rdsr_addr_nbytes = 4;
+
+	return 0;
 }
 
 static int s28hx_t_post_bfpt_fixup(struct spi_nor *nor,
-- 
2.34.1