linux-kernel - [PATCH v1 1/1] MIPS: TXx9: Convert SPI platform data to software nodes

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Message-Id: <20211126102339.28908-1-andriy.shevchenko@linux.intel.com>
Date:   Fri, 26 Nov 2021 12:23:39 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v1 1/1] MIPS: TXx9: Convert SPI platform data to software nodes

In order to get rid of legacy platform data in AT25 driver,
convert its users to use software nodes.

Suggested-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 arch/mips/include/asm/txx9/spi.h    |  4 ++--
 arch/mips/txx9/generic/spi_eeprom.c | 32 +++++++++++++++++------------
 arch/mips/txx9/rbtx4938/setup.c     |  6 +++---
 3 files changed, 24 insertions(+), 18 deletions(-)

diff --git a/arch/mips/include/asm/txx9/spi.h b/arch/mips/include/asm/txx9/spi.h
index 0d727f354557..1ca87a516b81 100644
--- a/arch/mips/include/asm/txx9/spi.h
+++ b/arch/mips/include/asm/txx9/spi.h
@@ -16,11 +16,11 @@
 #include <linux/errno.h>
 
 #ifdef CONFIG_SPI
-int spi_eeprom_register(int busid, int chipid, int size);
+int spi_eeprom_register(int busid, int chipid);
 int spi_eeprom_read(int busid, int chipid,
 		    int address, unsigned char *buf, int len);
 #else
-static inline int spi_eeprom_register(int busid, int chipid, int size)
+static inline int spi_eeprom_register(int busid, int chipid)
 {
 	return -ENODEV;
 }
diff --git a/arch/mips/txx9/generic/spi_eeprom.c b/arch/mips/txx9/generic/spi_eeprom.c
index d833dd2c9b55..cb4b4d47437e 100644
--- a/arch/mips/txx9/generic/spi_eeprom.c
+++ b/arch/mips/txx9/generic/spi_eeprom.c
@@ -9,18 +9,32 @@
  *
  * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@...sta.com)
  */
+#include <linux/device.h>
+#include <linux/export.h>
 #include <linux/init.h>
+#include <linux/property.h>
 #include <linux/slab.h>
-#include <linux/export.h>
-#include <linux/device.h>
+
 #include <linux/spi/spi.h>
-#include <linux/spi/eeprom.h>
+
 #include <asm/txx9/spi.h>
 
+#define AT250X0_SIZE		128
 #define AT250X0_PAGE_SIZE	8
 
+static const struct property_entry spi_eeprom_properties[] = {
+	PROPERTY_ENTRY_U32("size", AT250X0_SIZE),
+	PROPERTY_ENTRY_U32("pagesize", AT250X0_PAGE_SIZE),
+	PROPERTY_ENTRY_U32("address-width", 8),
+	{ }
+};
+
+static const struct software_node spi_eeprom_node = {
+	.properties = spi_eeprom_properties,
+};
+
 /* register board information for at25 driver */
-int __init spi_eeprom_register(int busid, int chipid, int size)
+int __init spi_eeprom_register(int busid, int chipid)
 {
 	struct spi_board_info info = {
 		.modalias = "at25",
@@ -28,16 +42,8 @@ int __init spi_eeprom_register(int busid, int chipid, int size)
 		.bus_num = busid,
 		.chip_select = chipid,
 		/* Mode 0: High-Active, Sample-Then-Shift */
+		.swnode = &spi_eeprom_node,
 	};
-	struct spi_eeprom *eeprom;
-	eeprom = kzalloc(sizeof(*eeprom), GFP_KERNEL);
-	if (!eeprom)
-		return -ENOMEM;
-	strcpy(eeprom->name, "at250x0");
-	eeprom->byte_len = size;
-	eeprom->page_size = AT250X0_PAGE_SIZE;
-	eeprom->flags = EE_ADDR1;
-	info.platform_data = eeprom;
 	return spi_register_board_info(&info, 1);
 }
 
diff --git a/arch/mips/txx9/rbtx4938/setup.c b/arch/mips/txx9/rbtx4938/setup.c
index e68eb2e7ce0c..136af1cace75 100644
--- a/arch/mips/txx9/rbtx4938/setup.c
+++ b/arch/mips/txx9/rbtx4938/setup.c
@@ -283,9 +283,9 @@ static int __init rbtx4938_spi_init(void)
 		.mode = SPI_MODE_1 | SPI_CS_HIGH,
 	};
 	spi_register_board_info(&srtc_info, 1);
-	spi_eeprom_register(SPI_BUSNO, SEEPROM1_CS, 128);
-	spi_eeprom_register(SPI_BUSNO, 16 + SEEPROM2_CS, 128);
-	spi_eeprom_register(SPI_BUSNO, 16 + SEEPROM3_CS, 128);
+	spi_eeprom_register(SPI_BUSNO,  0 + SEEPROM1_CS);
+	spi_eeprom_register(SPI_BUSNO, 16 + SEEPROM2_CS);
+	spi_eeprom_register(SPI_BUSNO, 16 + SEEPROM3_CS);
 	gpio_request(16 + SRTC_CS, "rtc-rs5c348");
 	gpio_direction_output(16 + SRTC_CS, 0);
 	gpio_request(SEEPROM1_CS, "seeprom1");
-- 
2.33.0