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Message-Id: <1352470801-2418-9-git-send-email-ciminaghi@gnudd.com>
Date: Fri, 9 Nov 2012 15:19:59 +0100
From: ciminaghi@...dd.com
To: sameo@...ux.intel.com, rubini@...dd.com, giancarlo.asnaghi@...com,
broonie@...nsource.wolfsonmicro.com
Cc: linux-kernel@...r.kernel.org,
Davide Ciminaghi <ciminaghi@...dd.com>
Subject: [PATCH 08/10] drivers/mfd/sta2x11-mfd: add scr (otp registers) platform driver
From: Davide Ciminaghi <ciminaghi@...dd.com>
Signed-off-by: Davide Ciminaghi <ciminaghi@...dd.com>
---
drivers/mfd/sta2x11-mfd.c | 52 ++++++++++++++++++++++++++++++++++++++-
include/linux/mfd/sta2x11-mfd.h | 7 ++++++
2 files changed, 58 insertions(+), 1 deletion(-)
diff --git a/drivers/mfd/sta2x11-mfd.c b/drivers/mfd/sta2x11-mfd.c
index da65839..7365f0f 100644
--- a/drivers/mfd/sta2x11-mfd.c
+++ b/drivers/mfd/sta2x11-mfd.c
@@ -175,10 +175,16 @@ static void sta2x11_regmap_unlock(void *__lock)
spin_unlock(lock);
}
+/* OTP (one time programmable registers do not require locking */
+static void sta2x11_regmap_nolock(void *__lock)
+{
+}
+
static const char *sta2x11_mfd_names[sta2x11_n_mfd_plat_devs] = {
[sta2x11_sctl] = STA2X11_MFD_SCTL_NAME,
[sta2x11_apbreg] = STA2X11_MFD_APBREG_NAME,
[sta2x11_apb_soc_regs] = STA2X11_MFD_APB_SOC_REGS_NAME,
+ [sta2x11_scr] = STA2X11_MFD_SCR_NAME,
};
static bool sta2x11_sctl_writeable_reg(struct device *dev, unsigned int reg)
@@ -196,6 +202,28 @@ static struct regmap_config sta2x11_sctl_regmap_config = {
.writeable_reg = sta2x11_sctl_writeable_reg,
};
+static bool sta2x11_scr_readable_reg(struct device *dev, unsigned int reg)
+{
+ return (reg == STA2X11_SECR_CR) ||
+ __reg_within_range(reg, STA2X11_SECR_FVR0, STA2X11_SECR_FVR1);
+}
+
+static bool sta2x11_scr_writeable_reg(struct device *dev, unsigned int reg)
+{
+ return false;
+}
+
+static struct regmap_config sta2x11_scr_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .lock = sta2x11_regmap_nolock,
+ .unlock = sta2x11_regmap_nolock,
+ .max_register = STA2X11_SECR_FVR1,
+ .readable_reg = sta2x11_scr_readable_reg,
+ .writeable_reg = sta2x11_scr_writeable_reg,
+};
+
static bool sta2x11_apbreg_readable_reg(struct device *dev, unsigned int reg)
{
/* Two blocks (CAN and MLB, SARAC) 0x100 bytes apart */
@@ -279,9 +307,10 @@ sta2x11_mfd_regmap_configs[sta2x11_n_mfd_plat_devs] = {
[sta2x11_sctl] = &sta2x11_sctl_regmap_config,
[sta2x11_apbreg] = &sta2x11_apbreg_regmap_config,
[sta2x11_apb_soc_regs] = &sta2x11_apb_soc_regs_regmap_config,
+ [sta2x11_scr] = &sta2x11_scr_regmap_config,
};
-/* Probe for the three platform devices */
+/* Probe for the four platform devices */
static int sta2x11_mfd_platform_probe(struct platform_device *dev,
enum sta2x11_mfd_plat_dev index)
@@ -339,6 +368,11 @@ static int sta2x11_apb_soc_regs_probe(struct platform_device *dev)
return sta2x11_mfd_platform_probe(dev, sta2x11_apb_soc_regs);
}
+static int sta2x11_scr_probe(struct platform_device *dev)
+{
+ return sta2x11_mfd_platform_probe(dev, sta2x11_scr);
+}
+
/* The three platform drivers */
static struct platform_driver sta2x11_sctl_platform_driver = {
.driver = {
@@ -382,6 +416,21 @@ static int __init sta2x11_apb_soc_regs_init(void)
return platform_driver_register(&sta2x11_apb_soc_regs_platform_driver);
}
+static struct platform_driver sta2x11_scr_platform_driver = {
+ .driver = {
+ .name = STA2X11_MFD_SCR_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = sta2x11_scr_probe,
+};
+
+static int __init sta2x11_scr_init(void)
+{
+ pr_info("%s\n", __func__);
+ return platform_driver_register(&sta2x11_scr_platform_driver);
+}
+
+
/*
* What follows are the PCI devices that host the above pdevs.
* Each logic block is 4kB and they are all consecutive: we use this info.
@@ -631,6 +680,7 @@ static int __init sta2x11_mfd_init(void)
subsys_initcall(sta2x11_apbreg_init);
subsys_initcall(sta2x11_sctl_init);
subsys_initcall(sta2x11_apb_soc_regs_init);
+subsys_initcall(sta2x11_scr_init);
rootfs_initcall(sta2x11_mfd_init);
MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/sta2x11-mfd.h b/include/linux/mfd/sta2x11-mfd.h
index 058de2b..08cad95 100644
--- a/include/linux/mfd/sta2x11-mfd.h
+++ b/include/linux/mfd/sta2x11-mfd.h
@@ -482,6 +482,13 @@ u32 sta2x11_apb_soc_regs_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val)
#define COMPENSATION_REG3 0x3cc
#define TEST_CTL_REG 0x3d0
+/*
+ * SECR (OTP) registers
+ */
+#define STA2X11_SECR_CR 0x00
+#define STA2X11_SECR_FVR0 0x10
+#define STA2X11_SECR_FVR1 0x14
+
extern int sta2x11_mfd_get_regs_data(struct platform_device *pdev,
enum sta2x11_mfd_plat_dev index,
void __iomem **regs,
--
1.7.10.4
--
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