linux-kernel - [PATCH RESEND v4 12/37] mtd: st_spi_fsm: Fetch platform specific configurations

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Message-Id: <1390473085-24626-13-git-send-email-lee.jones@linaro.org>
Date:	Thu, 23 Jan 2014 10:31:00 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	linus.walleij@...aro.org, dwmw2@...radead.org,
	linux-mtd@...ts.infradead.org, computersforpeace@...il.com,
	Angus.Clark@...com, DCG_UPD_stlinux_kernel@...t.st.com,
	olivier.clergeaud@...com, Lee Jones <lee.jones@...aro.org>
Subject: [PATCH RESEND v4 12/37] mtd: st_spi_fsm: Fetch platform specific configurations

All supported platforms are able to pass specific configurations via
the Device Tree on boot. Here we add a function which is to be called
during the probing process which will extract them, or make other
assumptions based on capabilities provided.

Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/mtd/devices/st_spi_fsm.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index efd8fdb..1803f94 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -654,6 +654,16 @@ static int stfsm_init(struct stfsm *fsm)
 	return 0;
 }
 
+static void stfsm_fetch_platform_configs(struct platform_device *pdev)
+{
+	struct stfsm *fsm = platform_get_drvdata(pdev);
+	struct flash_info *info = fsm->info;
+
+	/* Use device size to determine address width */
+	if (info->sector_size * info->n_sectors > 0xFFFFFF)
+		info->flags |= FLASH_FLAG_32BIT_ADDR;
+}
+
 static int stfsm_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
@@ -712,6 +722,8 @@ static int stfsm_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, fsm);
 
+	stfsm_fetch_platform_configs(pdev);
+
 	fsm->mtd.dev.parent	= &pdev->dev;
 	fsm->mtd.type		= MTD_NORFLASH;
 	fsm->mtd.writesize	= 4;
-- 
1.8.3.2

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