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Date: Wed, 11 Jun 2014 11:56:27 +0300
From: Roger Quadros <rogerq@...com>
To: <tony@...mide.com>, <dwmw2@...radead.org>,
<computersforpeace@...il.com>
CC: <kyungmin.park@...sung.com>, <pekon@...com>,
<ezequiel.garcia@...e-electrons.com>, <javier@...hile0.org>,
<nsekhar@...com>, <linux-omap@...r.kernel.org>,
<linux-mtd@...ts.infradead.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, Roger Quadros <rogerq@...com>
Subject: [PATCH 22/36] ARM: OMAP2+: gmpc: add gpmc_generic_init()
This function populates platform data for the specified Chip Select.
It should be called by board init code.
Signed-off-by: Roger Quadros <rogerq@...com>
---
arch/arm/mach-omap2/gpmc.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/gpmc.h | 6 ++++
2 files changed, 85 insertions(+)
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index ee030cd..d3a64ed 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -30,6 +30,7 @@
#include <linux/of_mtd.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
+#include <linux/slab.h>
#include <linux/platform_data/mtd-nand-omap2.h>
@@ -108,6 +109,8 @@
#define GPMC_NR_WAITPINS 4
+static struct gpmc_omap_platform_data gpmc_pdata;
+
/* Structure to save gpmc cs context */
struct gpmc_cs_config {
u32 config1;
@@ -1510,6 +1513,82 @@ static int __init omap_gpmc_init(void)
omap_postcore_initcall(omap_gpmc_init);
/**
+ * gpmc_generic_init - Initialize platform data for a Chip Select
+ *
+ * @cs chip select number
+ * @is_nand true if device is NAND flash.
+ * @settings GPMC settings
+ * @device_timings device timings for device on this CS
+ * @gpmc_timings GPMC timings
+ * @pdev platform device for the device on this CS
+ * @pdata_size platform data size for the platform device
+ */
+int gpmc_generic_init(int cs, bool is_nand,
+ struct gpmc_settings *settings,
+ struct gpmc_device_timings *device_timings,
+ struct gpmc_timings *gpmc_timings,
+ struct platform_device *pdev, unsigned pdata_size)
+{
+ struct gpmc_settings *gpmc_s = NULL;
+ struct gpmc_device_timings *gpmc_dev_t = NULL;
+ struct gpmc_timings *gpmc_t;
+
+ if (cs >= GPMC_CS_NUM) {
+ pr_err("%s: Invalid cs specified. Max CS = %d\n",
+ __func__, GPMC_CS_NUM);
+ return -EINVAL;
+ }
+
+ if (gpmc_pdata.cs[cs].valid) {
+ pr_err("%s: cs %d already requested, ignoring new request\n",
+ __func__, cs);
+ return -EINVAL;
+ }
+
+ if (settings) {
+ gpmc_s = kmemdup(settings, sizeof(*settings), GFP_KERNEL);
+ if (!gpmc_s)
+ return -ENOMEM;
+
+ gpmc_pdata.cs[cs].settings = gpmc_s;
+ }
+
+ if (device_timings) {
+ gpmc_dev_t = kmemdup(device_timings, sizeof(*device_timings),
+ GFP_KERNEL);
+ if (!gpmc_dev_t)
+ goto dev_t_fail;
+
+ gpmc_pdata.cs[cs].device_timings = gpmc_dev_t;
+ }
+
+ if (gpmc_timings) {
+ gpmc_t = kmemdup(gpmc_timings, sizeof(*gpmc_timings),
+ GFP_KERNEL);
+ if (!gpmc_t)
+ goto gpmc_t_fail;
+
+ gpmc_pdata.cs[cs].gpmc_timings = gpmc_t;
+ }
+
+ gpmc_pdata.cs[cs].is_nand = is_nand;
+ gpmc_pdata.cs[cs].pdev = pdev;
+ gpmc_pdata.cs[cs].pdata_size = pdata_size;
+ gpmc_pdata.cs[cs].valid = true;
+
+ return 0;
+
+gpmc_t_fail:
+ if (device_timings)
+ kfree(gpmc_dev_t);
+dev_t_fail:
+ if (settings)
+ kfree(gpmc_s);
+
+ return -ENOMEM;
+}
+
+/**
* omap_gpmc_retime - Reconfigre GPMC timings for the device
*
* @cs Chip select number
diff --git a/arch/arm/mach-omap2/gpmc.h b/arch/arm/mach-omap2/gpmc.h
index 6204913..301bc66 100644
--- a/arch/arm/mach-omap2/gpmc.h
+++ b/arch/arm/mach-omap2/gpmc.h
@@ -77,5 +77,11 @@ extern void omap3_gpmc_save_context(void);
extern void omap3_gpmc_restore_context(void);
extern void gpmc_read_settings_dt(struct device_node *np,
struct gpmc_settings *p);
+int gpmc_generic_init(int cs, bool is_nand,
+ struct gpmc_settings *settings,
+ struct gpmc_device_timings *device_timings,
+ struct gpmc_timings *gpmc_timings,
+ struct platform_device *pdev,
+ unsigned pdata_size);
#endif
--
1.8.3.2
--
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