[PATCH v6 11/13] ARM: OMAP2+: gpmc: cs reconfigure helper

[Afzal Mohammed]

Helper for reconfiguring CS. This helps if a
peripheral needs to reconfigure GPMC settings
different from the one which was configured
during probe.

Signed-off-by: Afzal Mohammed <afzal at ti.com>
---
 arch/arm/mach-omap2/gpmc.c             |   32 ++++++++++++++++++++++++++++++++
 arch/arm/plat-omap/include/plat/gpmc.h |    2 ++
 2 files changed, 34 insertions(+)

diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index ac66267..3729136 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -1420,6 +1420,38 @@ struct platform_device *gpmc_create_device(struct gpmc_peripheral *p)
 	return p->pdev;
 }
 
+static int gpmc_match_device(char *name, int id)
+{
+	int i;
+	struct gpmc_peripheral *g_per = gpmc_peripheral;
+
+	for (i = 0; i < gpmc_num_peripheral; i++, g_per++)
+		if (!strcmp(g_per->name, name) && g_per->id == id)
+			return i;
+
+	return -ENOENT;
+}
+
+int gpmc_cs_reconfigure(char *name, int id, struct gpmc_cs_data *c)
+{
+	int i;
+
+	i = gpmc_match_device(name, id);
+	if (IS_ERR_VALUE(i)) {
+		dev_err(gpmc_dev, "no device %s.%d to configure\n", name, id);
+		return i;
+	}
+
+	if (IS_ERR_VALUE(gpmc_setup_cs_config_timing(gpmc_peripheral + i, c))) {
+		dev_err(gpmc_dev, "error: configure device %s.%d\n", name, id);
+		return i;
+	}
+
+	return gpmc_setup_waitpin(gpmc_peripheral + i);
+
+}
+EXPORT_SYMBOL_GPL(gpmc_cs_reconfigure);
+
 static __devinit int gpmc_probe(struct platform_device *pdev)
 {
 	u32 l;
diff --git a/arch/arm/plat-omap/include/plat/gpmc.h b/arch/arm/plat-omap/include/plat/gpmc.h
index 1185490..7909867 100644
--- a/arch/arm/plat-omap/include/plat/gpmc.h
+++ b/arch/arm/plat-omap/include/plat/gpmc.h
@@ -248,6 +248,8 @@ extern int gpmc_cs_configure(int cs, int cmd, int wval);
 extern int gpmc_nand_read(int cs, int cmd);
 extern int gpmc_nand_write(int cs, int cmd, int wval);
 
+extern int gpmc_cs_reconfigure(char *name, int id, struct gpmc_cs_data *c);
+
 int gpmc_enable_hwecc(int cs, int mode, int dev_width, int ecc_size);
 int gpmc_calculate_ecc(int cs, const u_char *dat, u_char *ecc_code);
 
-- 
1.7.10.2