From 1648eaaa1575ea686acb82fb8cb3d8839764ef2c Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Fri, 18 Jan 2013 13:10:05 +0100 Subject: mtd: cfi_cmdset_0002: Support Persistent Protection Bits (PPB) locking Currently cfi_cmdset_0002.c does not support PPB locking of sectors. This patch adds support for this locking/unlocking mechanism. It is needed on some platforms, since newer U-Boot versions do support this PPB locking and protect for example their environment sector(s) this way. This PPB locking/unlocking will be enabled for all devices supported by cfi_cmdset_0002 reporting 8 in the CFI word 0x49 (Sector Protect/Unprotect scheme). Please note that PPB locking does support sector-by-sector locking. But the whole chip can only be unlocked together. So unlocking one sector will automatically unlock all sectors of this device. Because of this chip limitation, the PPB unlocking function saves the current locking status of all sectors before unlocking the whole device. After unlocking the saved locking status is re-configured. This way only the addressed sectors will be unlocked. To selectively enable this advanced sector protection mechanism, the device-tree property "use-advanced-sector-protection" has been created. To enable support for this locking this property needs to be present in the flash DT node. E.g.: nor_flash@0,0 { compatible = "amd,s29gl256n", "cfi-flash"; bank-width = <2>; use-advanced-sector-protection; ... Tested with Spansion S29GL512S10THI and Micron JS28F512M29EWx flash devices. Signed-off-by: Stefan Roese Tested-by: Holger Brunck Signed-off-by: Artem Bityutskiy --- drivers/mtd/maps/physmap_of.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/mtd/maps/physmap_of.c') diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c index 67cc73c18ddd..263d9e1b8001 100644 --- a/drivers/mtd/maps/physmap_of.c +++ b/drivers/mtd/maps/physmap_of.c @@ -241,6 +241,7 @@ static int of_flash_probe(struct platform_device *dev) info->list[i].map.phys = res.start; info->list[i].map.size = res_size; info->list[i].map.bankwidth = be32_to_cpup(width); + info->list[i].map.device_node = dp; err = -ENOMEM; info->list[i].map.virt = ioremap(info->list[i].map.phys, -- cgit v1.2.3 From eb82038f97f93c5f0ff274fb98a9fff741dc2f5e Mon Sep 17 00:00:00 2001 From: Ezequiel Garcia Date: Fri, 25 Jan 2013 11:50:27 -0300 Subject: mtd: physmap_of: Convert device allocation to managed devm_kzalloc() Signed-off-by: Ezequiel Garcia Signed-off-by: Artem Bityutskiy --- drivers/mtd/maps/physmap_of.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'drivers/mtd/maps/physmap_of.c') diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c index 263d9e1b8001..500d7f4f8028 100644 --- a/drivers/mtd/maps/physmap_of.c +++ b/drivers/mtd/maps/physmap_of.c @@ -68,9 +68,6 @@ static int of_flash_remove(struct platform_device *dev) kfree(info->list[i].res); } } - - kfree(info); - return 0; } @@ -199,8 +196,9 @@ static int of_flash_probe(struct platform_device *dev) map_indirect = of_property_read_bool(dp, "no-unaligned-direct-access"); err = -ENOMEM; - info = kzalloc(sizeof(struct of_flash) + - sizeof(struct of_flash_list) * count, GFP_KERNEL); + info = devm_kzalloc(&dev->dev, + sizeof(struct of_flash) + + sizeof(struct of_flash_list) * count, GFP_KERNEL); if (!info) goto err_flash_remove; -- cgit v1.2.3