From: Stephen Boyd <sboyd@codeaurora.org> To: Mark Brown <broonie@kernel.org> Cc: Samuel Ortiz <sameo@linux.intel.com>, Lee Jones <lee.jones@linaro.org>, Srinivas Ramana <sramana@codeaurora.org>, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 3/8] regmap: Add support for using regmap over ssbi Date: Fri, 13 Dec 2013 13:37:07 -0800 [thread overview] Message-ID: <20131213213707.GO21983@codeaurora.org> (raw) In-Reply-To: <20131213104128.GT11044@sirena.org.uk> On 12/13, Mark Brown wrote: > On Thu, Dec 12, 2013 at 03:13:01PM -0800, Stephen Boyd wrote: > > > > bulk_read() should decay to individual reads if there isn't a block > > > operaton and it's not like the hardware actually supports bulk reads > > > anyway. > > > So regmap_bulk_read() should work if I don't have a map->bus? To make it > > work with reg_read/write I had to do this. I'm not sure how to make > > bulk_write work. I came up with this (possibly ugly) patch. It works for my specific case but I'm not sure if unpacking the val bits into an unsigned int and passing that to _regmap_write() is sane. What do you think? ---8<---- diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 1ccd61b..333c059 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1514,11 +1514,9 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, { int ret = 0, i; size_t val_bytes = map->format.val_bytes; - void *wval; + void *wval = NULL; - if (!map->bus) - return -EINVAL; - if (!map->format.parse_inplace) + if (map->bus && !map->format.parse_inplace) return -EINVAL; if (reg % map->reg_stride) return -EINVAL; @@ -1528,7 +1526,7 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, /* No formatting is require if val_byte is 1 */ if (val_bytes == 1) { wval = (void *)val; - } else { + } else if (map->bus) { wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); if (!wval) { ret = -ENOMEM; @@ -1538,24 +1536,37 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, for (i = 0; i < val_count * val_bytes; i += val_bytes) map->format.parse_inplace(wval + i); } - /* - * Some devices does not support bulk write, for - * them we have a series of single write operations. - */ - if (map->use_single_rw) { - for (i = 0; i < val_count; i++) { - ret = _regmap_raw_write(map, + + if (map->bus) { + /* + * Some devices does not support bulk write, for + * them we have a series of single write operations. + */ + if (map->use_single_rw) { + for (i = 0; i < val_count; i++) { + ret = _regmap_raw_write(map, reg + (i * map->reg_stride), val + (i * val_bytes), val_bytes); - if (ret != 0) - return ret; + if (ret != 0) + return ret; + } + } else { + ret = _regmap_raw_write(map, reg, wval, + val_bytes * val_count); } } else { - ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); + for (i = 0; i < val_count; i++) { + unsigned int ival; + ival = *(unsigned int *)(val + (i * val_bytes)); + ret = _regmap_write(map, reg + (i * map->reg_stride), + ival); + if (ret != 0) + goto out; + } } - if (val_bytes != 1) + if (val_bytes != 1 && map->bus) kfree(wval); out: -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
WARNING: multiple messages have this Message-ID (diff)
From: sboyd@codeaurora.org (Stephen Boyd) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/8] regmap: Add support for using regmap over ssbi Date: Fri, 13 Dec 2013 13:37:07 -0800 [thread overview] Message-ID: <20131213213707.GO21983@codeaurora.org> (raw) In-Reply-To: <20131213104128.GT11044@sirena.org.uk> On 12/13, Mark Brown wrote: > On Thu, Dec 12, 2013 at 03:13:01PM -0800, Stephen Boyd wrote: > > > > bulk_read() should decay to individual reads if there isn't a block > > > operaton and it's not like the hardware actually supports bulk reads > > > anyway. > > > So regmap_bulk_read() should work if I don't have a map->bus? To make it > > work with reg_read/write I had to do this. I'm not sure how to make > > bulk_write work. I came up with this (possibly ugly) patch. It works for my specific case but I'm not sure if unpacking the val bits into an unsigned int and passing that to _regmap_write() is sane. What do you think? ---8<---- diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 1ccd61b..333c059 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1514,11 +1514,9 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, { int ret = 0, i; size_t val_bytes = map->format.val_bytes; - void *wval; + void *wval = NULL; - if (!map->bus) - return -EINVAL; - if (!map->format.parse_inplace) + if (map->bus && !map->format.parse_inplace) return -EINVAL; if (reg % map->reg_stride) return -EINVAL; @@ -1528,7 +1526,7 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, /* No formatting is require if val_byte is 1 */ if (val_bytes == 1) { wval = (void *)val; - } else { + } else if (map->bus) { wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL); if (!wval) { ret = -ENOMEM; @@ -1538,24 +1536,37 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val, for (i = 0; i < val_count * val_bytes; i += val_bytes) map->format.parse_inplace(wval + i); } - /* - * Some devices does not support bulk write, for - * them we have a series of single write operations. - */ - if (map->use_single_rw) { - for (i = 0; i < val_count; i++) { - ret = _regmap_raw_write(map, + + if (map->bus) { + /* + * Some devices does not support bulk write, for + * them we have a series of single write operations. + */ + if (map->use_single_rw) { + for (i = 0; i < val_count; i++) { + ret = _regmap_raw_write(map, reg + (i * map->reg_stride), val + (i * val_bytes), val_bytes); - if (ret != 0) - return ret; + if (ret != 0) + return ret; + } + } else { + ret = _regmap_raw_write(map, reg, wval, + val_bytes * val_count); } } else { - ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count); + for (i = 0; i < val_count; i++) { + unsigned int ival; + ival = *(unsigned int *)(val + (i * val_bytes)); + ret = _regmap_write(map, reg + (i * map->reg_stride), + ival); + if (ret != 0) + goto out; + } } - if (val_bytes != 1) + if (val_bytes != 1 && map->bus) kfree(wval); out: -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2013-12-13 21:37 UTC|newest] Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-12-10 23:35 [PATCH 0/8] Modernize pm8921 with irqdomains + regmap Stephen Boyd 2013-12-10 23:35 ` Stephen Boyd 2013-12-10 23:35 ` [PATCH 1/8] mfd: ssbi: Remove platform data structs and hide ssbi type enum Stephen Boyd 2013-12-10 23:35 ` Stephen Boyd 2013-12-11 9:27 ` Lee Jones 2013-12-11 9:27 ` Lee Jones 2013-12-10 23:35 ` [PATCH 2/8] mfd: ssbi: Constify buffer in ssbi_write Stephen Boyd 2013-12-10 23:35 ` Stephen Boyd 2013-12-11 9:28 ` Lee Jones 2013-12-11 9:28 ` Lee Jones 2013-12-10 23:35 ` [PATCH 3/8] regmap: Add support for using regmap over ssbi Stephen Boyd 2013-12-10 23:35 ` Stephen Boyd 2013-12-10 23:50 ` Mark Brown 2013-12-10 23:50 ` Mark Brown 2013-12-11 0:13 ` Stephen Boyd 2013-12-11 0:13 ` Stephen Boyd 2013-12-11 0:51 ` Mark Brown 2013-12-11 0:51 ` Mark Brown 2013-12-11 1:32 ` Stephen Boyd 2013-12-11 1:32 ` Stephen Boyd 2013-12-11 13:27 ` Mark Brown 2013-12-11 13:27 ` Mark Brown 2013-12-12 23:13 ` Stephen Boyd 2013-12-12 23:13 ` Stephen Boyd 2013-12-13 10:41 ` Mark Brown 2013-12-13 10:41 ` Mark Brown 2013-12-13 17:14 ` [PATCH] regmap: Allow regmap_bulk_read() to work for "no-bus" regmaps Stephen Boyd 2013-12-13 17:14 ` Stephen Boyd 2013-12-13 17:14 ` Stephen Boyd 2013-12-16 20:57 ` Mark Brown 2013-12-16 20:57 ` Mark Brown 2013-12-13 21:37 ` Stephen Boyd [this message] 2013-12-13 21:37 ` [PATCH 3/8] regmap: Add support for using regmap over ssbi Stephen Boyd 2013-12-16 21:01 ` Mark Brown 2013-12-16 21:01 ` Mark Brown 2013-12-17 2:30 ` [PATCH] regmap: Allow regmap_bulk_write() to work for "no-bus" regmaps Stephen Boyd 2013-12-17 2:30 ` Stephen Boyd 2013-12-18 18:45 ` Mark Brown 2013-12-18 18:45 ` Mark Brown 2013-12-23 20:05 ` Stephen Boyd 2013-12-23 20:05 ` Stephen Boyd 2013-12-24 12:53 ` Mark Brown 2013-12-24 12:53 ` Mark Brown 2013-12-26 19:34 ` Stephen Boyd 2013-12-26 19:34 ` Stephen Boyd 2013-12-26 21:52 ` [PATCH v2] " Stephen Boyd 2013-12-26 21:52 ` Stephen Boyd 2013-12-30 12:42 ` Mark Brown 2013-12-30 12:42 ` Mark Brown 2013-12-10 23:35 ` [PATCH 4/8] mfd: ssbi: Mark match table const Stephen Boyd 2013-12-10 23:35 ` Stephen Boyd 2013-12-11 9:29 ` Lee Jones 2013-12-11 9:29 ` Lee Jones 2013-12-10 23:35 ` [PATCH 5/8] mfd: Move pm8xxx-irq.c contents into only driver that uses it Stephen Boyd 2013-12-10 23:35 ` Stephen Boyd 2013-12-11 9:35 ` Lee Jones 2013-12-11 9:35 ` Lee Jones 2013-12-12 19:06 ` Stephen Boyd 2013-12-12 19:06 ` Stephen Boyd 2013-12-10 23:35 ` [PATCH 6/8] mfd: pm8921: Update for genirq changes Stephen Boyd 2013-12-10 23:35 ` Stephen Boyd 2013-12-11 9:48 ` Lee Jones 2013-12-11 9:48 ` Lee Jones 2013-12-10 23:35 ` [PATCH 7/8] mfd: pm8921: Migrate to irqdomains Stephen Boyd 2013-12-10 23:35 ` Stephen Boyd 2013-12-11 9:53 ` Lee Jones 2013-12-11 9:53 ` Lee Jones 2013-12-11 21:30 ` Courtney Cavin 2013-12-11 21:30 ` Courtney Cavin 2013-12-11 21:30 ` Courtney Cavin 2013-12-12 19:05 ` Stephen Boyd 2013-12-12 19:05 ` Stephen Boyd 2013-12-12 19:05 ` Stephen Boyd 2013-12-10 23:35 ` [PATCH 8/8] mfd: pm8921: Use ssbi regmap Stephen Boyd 2013-12-10 23:35 ` Stephen Boyd 2013-12-11 9:55 ` Lee Jones 2013-12-11 9:55 ` Lee Jones
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