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This pull request contains Broadcom SoCs driver changes for 6.2, please

Browse Source 
pull the following:
 
 - Yuan uses dev_err_probe() in the Raspberry Pi firmware provider to
   simplify the error handling code
 
 - Rafal adds support for initialiazing the BCM47xx NVMEM/NVRAM firmware
   provider out of memory-mapped flash devices.
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Merge tag 'arm-soc/for-6.2/drivers' of https://github.com/Broadcom/stblinux into soc/drivers

This pull request contains Broadcom SoCs driver changes for 6.2, please
pull the following:

- Yuan uses dev_err_probe() in the Raspberry Pi firmware provider to
  simplify the error handling code

- Rafal adds support for initialiazing the BCM47xx NVMEM/NVRAM firmware
  provider out of memory-mapped flash devices.

* tag 'arm-soc/for-6.2/drivers' of https://github.com/Broadcom/stblinux:
  firmware/nvram: bcm47xx: support init from IO memory
  firmware: raspberrypi: Use dev_err_probe() to simplify code

Link: https://lore.kernel.org/r/20221129191755.542584-3-f.fainelli@gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2022-11-30 17:52:39 +01:00
commit 69a485191b
4 changed files with 30 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/firmware/broadcom/bcm47xx_nvram.c
View File

@ -110,6 +110,24 @@ found:
return 0;
}
int bcm47xx_nvram_init_from_iomem(void __iomem *nvram_start, size_t res_size)
{
if (nvram_len) {
pr_warn("nvram already initialized\n");
return -EEXIST;
}
if (!bcm47xx_nvram_is_valid(nvram_start)) {
pr_err("No valid NVRAM found\n");
return -ENOENT;
}
bcm47xx_nvram_copy(nvram_start, res_size);
return 0;
}
EXPORT_SYMBOL_GPL(bcm47xx_nvram_init_from_iomem);
/*
* On bcm47xx we need access to the NVRAM very early, so we can't use mtd
* subsystem to access flash. We can't even use platform device / driver to

9
drivers/firmware/raspberrypi.c
View File

@ -268,12 +268,9 @@ static int rpi_firmware_probe(struct platform_device *pdev)
fw->cl.tx_block = true;
fw->chan = mbox_request_channel(&fw->cl, 0);
if (IS_ERR(fw->chan)) {
int ret = PTR_ERR(fw->chan);
if (ret != -EPROBE_DEFER)
dev_err(dev, "Failed to get mbox channel: %d\n", ret);
return ret;
}
if (IS_ERR(fw->chan))
return dev_err_probe(dev, PTR_ERR(fw->chan),
"Failed to get mbox channel\n");
init_completion(&fw->c);
kref_init(&fw->consumers);

3
drivers/nvmem/brcm_nvram.c
View File

@ -3,6 +3,7 @@
* Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl>
*/
#include <linux/bcm47xx_nvram.h>
#include <linux/io.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
@ -136,6 +137,8 @@ static int brcm_nvram_probe(struct platform_device *pdev)
if (err)
return err;
bcm47xx_nvram_init_from_iomem(priv->base, resource_size(res));
config.dev = dev;
config.cells = priv->cells;
config.ncells = priv->ncells;

6
include/linux/bcm47xx_nvram.h
View File

@ -11,6 +11,7 @@
#include <linux/vmalloc.h>
#ifdef CONFIG_BCM47XX_NVRAM
int bcm47xx_nvram_init_from_iomem(void __iomem *nvram_start, size_t res_size);
int bcm47xx_nvram_init_from_mem(u32 base, u32 lim);
int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len);
int bcm47xx_nvram_gpio_pin(const char *name);
@ -20,6 +21,11 @@ static inline void bcm47xx_nvram_release_contents(char *nvram)
vfree(nvram);
};
#else
static inline int bcm47xx_nvram_init_from_iomem(void __iomem *nvram_start,
size_t res_size)
{
return -ENOTSUPP;
}
static inline int bcm47xx_nvram_init_from_mem(u32 base, u32 lim)
{
return -ENOTSUPP;