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nvmem: bcm-ocotp: Add ACPI support to BCM OCOTP 

Add ACPI support to bcm ocotp driver

This patch is based on Linux-4.20-rc7.

Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com>
Acked-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Srinath Mannam 2019-01-28 15:54:55 +00:00 committed by Greg Kroah-Hartman
parent 996e39bb03
commit 1694155573
1 changed files with 20 additions and 17 deletions
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37
drivers/nvmem/bcm-ocotp.c
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@ -11,13 +11,14 @@
* GNU General Public License for more details.
*/
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/nvmem-provider.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
/*
@ -78,9 +79,9 @@ static struct otpc_map otp_map_v2 = {
};
struct otpc_priv {
struct device *dev;
void __iomem *base;
struct otpc_map *map;
struct device *dev;
void __iomem *base;
const struct otpc_map *map;
struct nvmem_config *config;
};
@ -237,16 +238,22 @@ static struct nvmem_config bcm_otpc_nvmem_config = {
};
static const struct of_device_id bcm_otpc_dt_ids[] = {
{ .compatible = "brcm,ocotp" },
{ .compatible = "brcm,ocotp-v2" },
{ .compatible = "brcm,ocotp", .data = &otp_map },
{ .compatible = "brcm,ocotp-v2", .data = &otp_map_v2 },
{ },
};
MODULE_DEVICE_TABLE(of, bcm_otpc_dt_ids);
static const struct acpi_device_id bcm_otpc_acpi_ids[] = {
{ .id = "BRCM0700", .driver_data = (kernel_ulong_t)&otp_map },
{ .id = "BRCM0701", .driver_data = (kernel_ulong_t)&otp_map_v2 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(acpi, bcm_otpc_acpi_ids);
static int bcm_otpc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *dn = dev->of_node;
struct resource *res;
struct otpc_priv *priv;
struct nvmem_device *nvmem;
@ -257,14 +264,9 @@ static int bcm_otpc_probe(struct platform_device *pdev)
if (!priv)
return -ENOMEM;
if (of_device_is_compatible(dev->of_node, "brcm,ocotp"))
priv->map = &otp_map;
else if (of_device_is_compatible(dev->of_node, "brcm,ocotp-v2"))
priv->map = &otp_map_v2;
else {
dev_err(dev, "%s otpc config map not defined\n", __func__);
return -EINVAL;
}
priv->map = device_get_match_data(dev);
if (!priv->map)
return -ENODEV;
/* Get OTP base address register. */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@ -281,7 +283,7 @@ static int bcm_otpc_probe(struct platform_device *pdev)
reset_start_bit(priv->base);
/* Read size of memory in words. */
err = of_property_read_u32(dn, "brcm,ocotp-size", &num_words);
err = device_property_read_u32(dev, "brcm,ocotp-size", &num_words);
if (err) {
dev_err(dev, "size parameter not specified\n");
return -EINVAL;
@ -294,7 +296,7 @@ static int bcm_otpc_probe(struct platform_device *pdev)
bcm_otpc_nvmem_config.dev = dev;
bcm_otpc_nvmem_config.priv = priv;
if (of_device_is_compatible(dev->of_node, "brcm,ocotp-v2")) {
if (priv->map == &otp_map_v2) {
bcm_otpc_nvmem_config.word_size = 8;
bcm_otpc_nvmem_config.stride = 8;
}
@ -315,6 +317,7 @@ static struct platform_driver bcm_otpc_driver = {
.driver = {
.name = "brcm-otpc",
.of_match_table = bcm_otpc_dt_ids,
.acpi_match_table = ACPI_PTR(bcm_otpc_acpi_ids),
},
};
module_platform_driver(bcm_otpc_driver);