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Message-Id: <1421853868-8262-3-git-send-email-lee.jones@linaro.org>
Date: Wed, 21 Jan 2015 15:24:20 +0000
From: Lee Jones <lee.jones@...aro.org>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: lee.jones@...aro.org, kernel@...inux.com,
linux-mtd@...ts.infradead.org, computersforpeace@...il.com,
devicetree@...r.kernel.org
Subject: [PATCH v4 02/10] mtd: st_spi_fsm: Fetch boot device locations from DT match tables
To trim down on the amount of properties used by this driver and to conform
to the newly agreed method of acquiring syscfg registers/offsets, we now
obtain this information using match tables.
In the process we are deprecating the old generic compatible string and
providing 3 shiny new ones for each of the support platforms. The
deprecated compatible string will be removed in due course.
Cc: devicetree@...r.kernel.org
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
drivers/mtd/devices/st_spi_fsm.c | 74 ++++++++++++++++++++++++++++++----------
1 file changed, 56 insertions(+), 18 deletions(-)
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index 3060025..9e4fded 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -29,6 +29,21 @@
#include "serial_flash_cmds.h"
/*
+ * FSM SPI Boot Mode Registers/Masks
+ */
+#define STID127_SYSCON_BOOT_DEV_REG 0x0D8
+#define STID127_SYSCON_BOOT_DEV_SPI 0x068
+#define STID127_SYSCON_BOOT_DEV_MASK 0x07C
+
+#define STIH407_SYSCON_BOOT_DEV_REG 0x8C4
+#define STIH407_SYSCON_BOOT_DEV_SPI 0x068
+#define STIH407_SYSCON_BOOT_DEV_MASK 0x07C
+
+#define STIH416_SYSCON_BOOT_DEV_REG 0x958
+#define STIH416_SYSCON_BOOT_DEV_SPI 0x01A
+#define STIH416_SYSCON_BOOT_DEV_MASK 0x01F
+
+/*
* FSM SPI Controller Registers
*/
#define SPI_CLOCKDIV 0x0010
@@ -288,6 +303,12 @@ struct seq_rw_config {
uint8_t dummy_cycles; /* No. of DUMMY cycles */
};
+struct stfsm_boot_dev {
+ uint32_t reg;
+ uint32_t spi;
+ uint32_t mask;
+};
+
/* SPI Flash Device Table */
struct flash_info {
char *name;
@@ -313,6 +334,24 @@ struct flash_info {
int (*config)(struct stfsm *);
};
+static struct stfsm_boot_dev stfsm_stid127_data = {
+ .reg = STID127_SYSCON_BOOT_DEV_REG,
+ .spi = STID127_SYSCON_BOOT_DEV_SPI,
+ .mask = STID127_SYSCON_BOOT_DEV_MASK,
+};
+
+static struct stfsm_boot_dev stfsm_stih407_data = {
+ .reg = STIH407_SYSCON_BOOT_DEV_REG,
+ .spi = STIH407_SYSCON_BOOT_DEV_SPI,
+ .mask = STIH407_SYSCON_BOOT_DEV_MASK,
+};
+
+static struct stfsm_boot_dev stfsm_stih416_data = {
+ .reg = STIH416_SYSCON_BOOT_DEV_REG,
+ .spi = STIH416_SYSCON_BOOT_DEV_SPI,
+ .mask = STIH416_SYSCON_BOOT_DEV_MASK,
+};
+
static int stfsm_n25q_config(struct stfsm *fsm);
static int stfsm_mx25_config(struct stfsm *fsm);
static int stfsm_s25fl_config(struct stfsm *fsm);
@@ -1977,14 +2016,22 @@ static int stfsm_init(struct stfsm *fsm)
return 0;
}
+static const struct of_device_id stfsm_match[] = {
+ { .compatible = "st,stid127-spi-fsm", .data = &stfsm_stid127_data },
+ { .compatible = "st,stih407-spi-fsm", .data = &stfsm_stih407_data },
+ { .compatible = "st,stih416-spi-fsm", .data = &stfsm_stih416_data },
+ {},
+};
+MODULE_DEVICE_TABLE(of, stfsm_match);
+
static void stfsm_fetch_platform_configs(struct platform_device *pdev)
{
struct stfsm *fsm = platform_get_drvdata(pdev);
struct device_node *np = pdev->dev.of_node;
+ const struct stfsm_boot_dev *boot_dev;
+ const struct of_device_id *match;
struct regmap *regmap;
- uint32_t boot_device_reg;
- uint32_t boot_device_spi;
- uint32_t boot_device; /* Value we read from *boot_device_reg */
+ uint32_t boot_device; /* Value we read from the boot dev mode pins */
int ret;
/* Booting from SPI NOR Flash is the default */
@@ -1998,21 +2045,18 @@ static void stfsm_fetch_platform_configs(struct platform_device *pdev)
fsm->reset_por = of_property_read_bool(np, "st,reset-por");
- /* Where in the syscon the boot device information lives */
- ret = of_property_read_u32(np, "st,boot-device-reg", &boot_device_reg);
- if (ret)
+ match = of_match_node(stfsm_match, np);
+ if (!match)
goto boot_device_fail;
+ boot_dev = match->data;
- /* Boot device value when booted from SPI NOR */
- ret = of_property_read_u32(np, "st,boot-device-spi", &boot_device_spi);
+ ret = regmap_read(regmap, boot_dev->reg, &boot_device);
if (ret)
goto boot_device_fail;
- ret = regmap_read(regmap, boot_device_reg, &boot_device);
- if (ret)
- goto boot_device_fail;
+ boot_device &= boot_dev->mask;
- if (boot_device != boot_device_spi)
+ if (boot_device != boot_dev->spi)
fsm->booted_from_spi = false;
return;
@@ -2156,12 +2200,6 @@ static int stfsmfsm_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(stfsm_pm_ops, stfsmfsm_suspend, stfsmfsm_resume);
-static const struct of_device_id stfsm_match[] = {
- { .compatible = "st,spi-fsm", },
- {},
-};
-MODULE_DEVICE_TABLE(of, stfsm_match);
-
static struct platform_driver stfsm_driver = {
.probe = stfsm_probe,
.remove = stfsm_remove,
--
1.9.1
--
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