@@ -26,4 +26,10 @@ config EEPROM_SUNXI_SID
This driver can also be built as a module. If so, the module
will be called sunxi_sid.
+config QCOM_QFPROM
+ tristate "QCOM QFPROM Support"
+ depends on EEPROM
+ help
+ Say y here to enable QFPROM support. The QFPROM provides access
+ functions for QFPROM data to rest of the drivers via eeprom interface.
endif
@@ -8,3 +8,4 @@ obj-$(CONFIG_EEPROM) += core.o
# Devices
obj-$(CONFIG_EEPROM_SUNXI_SID) += eeprom-sunxi-sid.o
+obj-$(CONFIG_QCOM_QFPROM) += qfprom.o
new file mode 100644
@@ -0,0 +1,75 @@
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/eeprom-provider.h>
+
+static struct regmap_config qfprom_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 8,
+ .reg_stride = 1,
+};
+
+static int qfprom_remove(struct platform_device *pdev)
+{
+ struct eeprom_device *eeprom = platform_get_drvdata(pdev);
+
+ return eeprom_unregister(eeprom);
+}
+
+static int qfprom_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ void __iomem *base;
+ struct device *dev = &pdev->dev;
+ struct eeprom_device *eeprom;
+ int rval;
+
+ eeprom = devm_kzalloc(dev, sizeof(*eeprom), GFP_KERNEL);
+ if (!eeprom)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ qfprom_regmap_config.max_register = resource_size(res) - 1;
+
+ eeprom->regmap = devm_regmap_init_mmio(dev, base,
+ &qfprom_regmap_config);
+ if (IS_ERR(eeprom->regmap)) {
+ dev_err(dev, "regmap init failed\n");
+ return PTR_ERR(eeprom->regmap);
+ }
+
+ eeprom->dev = dev;
+ eeprom->stride = qfprom_regmap_config.reg_stride;
+ eeprom->size = resource_size(res) - 1;
+ rval = eeprom_register(eeprom);
+ if (rval)
+ return rval;
+
+ platform_set_drvdata(pdev, eeprom);
+ return 0;
+}
+
+static const struct of_device_id qfprom_of_match[] = {
+ { .compatible = "qcom,qfprom"},
+ {/* sentinel */},
+};
+MODULE_DEVICE_TABLE(of, qfprom_of_match);
+
+static struct platform_driver qfprom_driver = {
+ .probe = qfprom_probe,
+ .remove = qfprom_remove,
+ .driver = {
+ .name = "qcom,qfprom",
+ .of_match_table = qfprom_of_match,
+ },
+};
+module_platform_driver(qfprom_driver);
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
+MODULE_DESCRIPTION("Qualcomm QFPROM driver");
+MODULE_LICENSE("GPL2");
This patch adds QFPROM support driver which is used by other drivers like thermal sensor and cpufreq. On MSM parts there are some efuses (called qfprom) these fuses store things like calibration data, speed bins.. etc. Drivers like cpufreq, thermal sensors would read out this data for configuring the driver. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> --- drivers/eeprom/Kconfig | 6 ++++ drivers/eeprom/Makefile | 1 + drivers/eeprom/qfprom.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 82 insertions(+) create mode 100644 drivers/eeprom/qfprom.c