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| author | John Crispin <john@phrozen.org> | 2016-12-25 20:11:34 +0100 |
|---|---|---|
| committer | John Crispin <john@phrozen.org> | 2017-08-05 08:46:36 +0200 |
| commit | 74d00a8c3849c1340efd713eb94b786e304c201f (patch) | |
| tree | de481743de61c34da96ab5f9dba3af3edcfb8260 /target/linux/generic/patches-4.4/042-0003-mtd-bcm47xxsflash-use-uncached-MMIO-access-for-BCM53.patch | |
| parent | de350550ef648d9728351b986b0516fa29465c45 (diff) | |
| download | mtk-20170518-74d00a8c3849c1340efd713eb94b786e304c201f.zip mtk-20170518-74d00a8c3849c1340efd713eb94b786e304c201f.tar.gz mtk-20170518-74d00a8c3849c1340efd713eb94b786e304c201f.tar.bz2 | |
kernel: split patches folder up into backport, pending and hack folders
* properly format/comment all patches
* merge debloat patches
* merge Kconfig patches
* merge swconfig patches
* merge hotplug patches
* drop 200-fix_localversion.patch - upstream
* drop 222-arm_zimage_none.patch - unused
* drop 252-mv_cesa_depends.patch - no longer required
* drop 410-mtd-move-forward-declaration-of-struct-mtd_info.patch - unused
* drop 661-fq_codel_keep_dropped_stats.patch - outdated
* drop 702-phy_add_aneg_done_function.patch - upstream
* drop 840-rtc7301.patch - unused
* drop 841-rtc_pt7c4338.patch - upstream
* drop 921-use_preinit_as_init.patch - unused
* drop spio-gpio-old and gpio-mmc - unused
Signed-off-by: John Crispin <john@phrozen.org>
Diffstat (limited to 'target/linux/generic/patches-4.4/042-0003-mtd-bcm47xxsflash-use-uncached-MMIO-access-for-BCM53.patch')
| -rw-r--r-- | target/linux/generic/patches-4.4/042-0003-mtd-bcm47xxsflash-use-uncached-MMIO-access-for-BCM53.patch | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/target/linux/generic/patches-4.4/042-0003-mtd-bcm47xxsflash-use-uncached-MMIO-access-for-BCM53.patch b/target/linux/generic/patches-4.4/042-0003-mtd-bcm47xxsflash-use-uncached-MMIO-access-for-BCM53.patch deleted file mode 100644 index c2f2d21..0000000 --- a/target/linux/generic/patches-4.4/042-0003-mtd-bcm47xxsflash-use-uncached-MMIO-access-for-BCM53.patch +++ /dev/null @@ -1,59 +0,0 @@ -From 64ad46379fcf14f437553f654d1adcd3d0e0d7f9 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> -Date: Mon, 15 Aug 2016 14:21:28 +0200 -Subject: [PATCH] mtd: bcm47xxsflash: use uncached MMIO access for BCM53573 -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -BCM53573 is a new series of Broadcom's SoCs. It's based on ARM and uses -this old ChipCommon-based flash access. Early tests resulted in flash -corruptions that were tracked down to using cached MMIO for flash read -access. Switch to ioremap_nocache conditionally to support BCM53573 and -don't break performance on old MIPS devices. - -Signed-off-by: Rafał Miłecki <rafal@milecki.pl> -Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> -Signed-off-by: Brian Norris <computersforpeace@gmail.com> ---- - drivers/mtd/devices/bcm47xxsflash.c | 24 +++++++++++++++++++----- - 1 file changed, 19 insertions(+), 5 deletions(-) - ---- a/drivers/mtd/devices/bcm47xxsflash.c -+++ b/drivers/mtd/devices/bcm47xxsflash.c -@@ -296,16 +296,30 @@ static int bcm47xxsflash_bcma_probe(stru - dev_err(dev, "can't request region for resource %pR\n", res); - return -EBUSY; - } -- b47s->window = ioremap_cache(res->start, resource_size(res)); -- if (!b47s->window) { -- dev_err(dev, "ioremap failed for resource %pR\n", res); -- return -ENOMEM; -- } - - b47s->bcma_cc = container_of(sflash, struct bcma_drv_cc, sflash); - b47s->cc_read = bcm47xxsflash_bcma_cc_read; - b47s->cc_write = bcm47xxsflash_bcma_cc_write; - -+ /* -+ * On old MIPS devices cache was magically invalidated when needed, -+ * allowing us to use cached access and gain some performance. Trying -+ * the same on ARM based BCM53573 results in flash corruptions, we need -+ * to use uncached access for it. -+ * -+ * It may be arch specific, but right now there is only 1 ARM SoC using -+ * this driver, so let's follow Broadcom's reference code and check -+ * ChipCommon revision. -+ */ -+ if (b47s->bcma_cc->core->id.rev == 54) -+ b47s->window = ioremap_nocache(res->start, resource_size(res)); -+ else -+ b47s->window = ioremap_cache(res->start, resource_size(res)); -+ if (!b47s->window) { -+ dev_err(dev, "ioremap failed for resource %pR\n", res); -+ return -ENOMEM; -+ } -+ - switch (b47s->bcma_cc->capabilities & BCMA_CC_CAP_FLASHT) { - case BCMA_CC_FLASHT_STSER: - b47s->type = BCM47XXSFLASH_TYPE_ST; |