summaryrefslogtreecommitdiffstats
path: root/drivers/clk/sprd/div.c
diff options
context:
space:
mode:
authorNiklas Cassel <cassel@kernel.org>2026-09-16 15:00:32 +0200
committerNiklas Cassel <cassel@kernel.org>2026-09-16 16:18:00 +0200
commit8d836581f9b1f57ceaa2b47654754ef1260b410b (patch)
tree1dbd4d0dfb99c2e238356cbe947e5b0be3e3a571 /drivers/clk/sprd/div.c
downloadlinux-stable-8d836581f9b1f57ceaa2b47654754ef1260b410b.tar.gz
linux-stable-8d836581f9b1f57ceaa2b47654754ef1260b410b.zip
ata: libata-scsi: fix ata_dsm_trim_pages() kernel-docgrafted
make htmldocs fails with: Documentation/driver-api/libata:604: ./drivers/ata/libata-scsi.c:2301: ERROR: Unexpected indentation. [docutils] The Return: section of ata_dsm_trim_pages() ends its first sentence with a colon and continues with an indented bullet list. reStructuredText requires a blank line before an indented block, so docutils chokes on the list. Simply adding the missing blank line does not work either: Return: is a kernel-doc "special section", which is terminated by the first blank line, so the bullet list would end up in the Description section, detached from the sentence introducing it. Spell the two bounds out as prose instead, so that the Return: section stays self-contained. Documentation-only change. Fixes: e64e6b5dc867 ("ata: libata-scsi: scale DSM TRIM payload by MAX PAGES PER DSM COMMAND") Reported-by: Thomas Huth <thuth@redhat.com> Closes: https://lore.kernel.org/linux-ide/b0a0b8e8-cc4f-4c7b-8bc5-fee0712d405a@redhat.com/ Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Link: https://lore.kernel.org/r/20260916130031.29990-2-cassel@kernel.org Signed-off-by: Niklas Cassel <cassel@kernel.org>
Diffstat (limited to 'drivers/clk/sprd/div.c')
-rw-r--r--drivers/clk/sprd/div.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/clk/sprd/div.c b/drivers/clk/sprd/div.c
new file mode 100644
index 000000000..cd57163a7
--- /dev/null
+++ b/drivers/clk/sprd/div.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Spreadtrum divider clock driver
+//
+// Copyright (C) 2017 Spreadtrum, Inc.
+// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
+
+#include <linux/clk-provider.h>
+
+#include "div.h"
+
+static int sprd_div_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ struct sprd_div *cd = hw_to_sprd_div(hw);
+
+ return divider_determine_rate(&cd->common.hw, req, NULL, cd->div.width, 0);
+}
+
+unsigned long sprd_div_helper_recalc_rate(struct sprd_clk_common *common,
+ const struct sprd_div_internal *div,
+ unsigned long parent_rate)
+{
+ unsigned long val;
+ unsigned int reg;
+
+ regmap_read(common->regmap, common->reg + div->offset, &reg);
+ val = reg >> div->shift;
+ val &= (1 << div->width) - 1;
+
+ return divider_recalc_rate(&common->hw, parent_rate, val, NULL, 0,
+ div->width);
+}
+EXPORT_SYMBOL_GPL(sprd_div_helper_recalc_rate);
+
+static unsigned long sprd_div_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sprd_div *cd = hw_to_sprd_div(hw);
+
+ return sprd_div_helper_recalc_rate(&cd->common, &cd->div, parent_rate);
+}
+
+int sprd_div_helper_set_rate(const struct sprd_clk_common *common,
+ const struct sprd_div_internal *div,
+ unsigned long rate,
+ unsigned long parent_rate)
+{
+ unsigned long val;
+ unsigned int reg;
+
+ val = divider_get_val(rate, parent_rate, NULL,
+ div->width, 0);
+
+ regmap_read(common->regmap, common->reg + div->offset, &reg);
+ reg &= ~GENMASK(div->width + div->shift - 1, div->shift);
+
+ regmap_write(common->regmap, common->reg + div->offset,
+ reg | (val << div->shift));
+
+ return 0;
+
+}
+EXPORT_SYMBOL_GPL(sprd_div_helper_set_rate);
+
+static int sprd_div_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct sprd_div *cd = hw_to_sprd_div(hw);
+
+ return sprd_div_helper_set_rate(&cd->common, &cd->div,
+ rate, parent_rate);
+}
+
+const struct clk_ops sprd_div_ops = {
+ .recalc_rate = sprd_div_recalc_rate,
+ .determine_rate = sprd_div_determine_rate,
+ .set_rate = sprd_div_set_rate,
+};
+EXPORT_SYMBOL_GPL(sprd_div_ops);