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(hq.lemonage.de [87.138.178.34]) by smtp2.goneo.de (Postfix) with ESMTPA id 26D23242AF2; Thu, 29 Oct 2020 10:52:53 +0100 (CET) From: poeschel@lemonage.de To: Miguel Ojeda Sandonis , Willy Tarreau , Ksenija Stanojevic , linux-kernel@vger.kernel.org Cc: Lars Poeschel Subject: [PATCH 00/25] Make charlcd device independent Date: Thu, 29 Oct 2020 10:52:06 +0100 Message-Id: <20201029095231.311083-1-poeschel@lemonage.de> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lars Poeschel This tries to make charlcd device independent. At the moment hd44780 device specific code is contained deep in charlcd. This moves this out into a hd44780_common module, where the two hd44780 drivers we have at the moment (hd44780 and panel) can use this from. The goal is that at the end other drivers can use the charlcd interface. I add one such driver for a modtronix lcd displau with the last patch. I submitted this already some time ago, where the wish was so split this into smaller chunks what I try to do with this patchset. This is v5 of the patchset. I address a few review comments with this. I fixed some typos, but more importantly Miguel spotted that I reverted commit 3f03b6498 ("auxdisplay: charlcd: Reuse hex_to_bin() instead of custom code") during rebasing. This is corrected now. As a note to patch 23: This might slightly change behaviour. On hd44780 displays with one or two lines the previous implementation did still write characters to the buffer of the display even if they are currently not visible. The shift_display command could be used so set the "viewing window" to a new position in the buffer and then you could see the characters previously written. This described behaviour does not work for hd44780 displays with more than two display lines. There simply is not enough buffer. So the behaviour was a bit inconsistens across different displays. The new behaviour is to stop writing character at the end of a visible line, even if there would be room in the buffer. This allows us to have an easy implementation, that should behave equal on all supported displays. This is not hd44780 hardware dependent anymore. Link: https://lore.kernel.org/lkml/20191016082430.5955-1-poeschel@lemonage.de/ Link: https://lore.kernel.org/lkml/CANiq72kS-u_Xd_m+2CQVh-JCncPf1XNXrXAZ=4z+mze8fwv2kw@mail.gmail.com/ Changes in v5: - patch 1: Fix a commit message typo: of -> on - patch 2: Remove some unnecessary newlines - patch 8: Fix some typos - patch 14: Fix commit message typo: it's -> its - patch 15: this patch is squashed together from the former individual hd44780_common_ function patches - patch 16: combined two cleanup patches - patch 17: I did previously undo commit 3f03b6498 which was a mistake. This is now corrected. - patch 24: Picked up Robs Reviewed-by - patch 25: use hex_to_bin like in commit 3f03b6498 but for the lcd2s.c file Changes in v4: - modtronix -> Modtronix in new lcd2s driver - Kconfig: remove "default n" in new lcd2s driver Changes in v3: - Fix some typos in Kconfig stuff - Fix kernel test robot reported error: Missed EXPORT_SYMBOL_GPL - new patch to reduce display timeout - better patch description to why not move cursor beyond end of a line - Fixed make dt_binding_doc errors Changes in v2: - split whole patch into many smaller chunks - device tree doc in yaml Lars Poeschel (25): auxdisplay: Use an enum for charlcd backlight on/off ops auxdisplay: Introduce hd44780_common.[ch] auxdisplay: Move hwidth and bwidth to struct hd44780_common auxdisplay: Move ifwidth to struct hd44780_common auxdisplay: Move write_data pointer to hd44780_common auxdisplay: Move write_cmd pointers to hd44780 drivers auxdisplay: Move addr out of charlcd_priv auxdisplay: hd44780_common_print auxdisplay: provide hd44780_common_gotoxy auxdisplay: add home to charlcd_ops auxdisplay: Move clear_display to hd44780_common auxdisplay: make charlcd_backlight visible to hd44780_common auxdisplay: Make use of enum for backlight on / off auxdisplay: Move init_display to hd44780_common auxdisplay: implement various hd44780_common_ functions auxdisplay: cleanup unnecessary hd44780 code in charlcd auxdisplay: Move char redefine code to hd44780_common auxdisplay: Call charlcd_backlight in place auxdisplay: hd44780_common: Reduce clear_display timeout auxdisplay: hd44780: Remove clear_fast auxdisplay: charlcd: replace last device specific stuff auxdisplay: Change gotoxy calling interface auxdisplay: charlcd: Do not print chars at end of line auxdisplay: lcd2s DT binding doc auxdisplay: add a driver for lcd2s character display .../bindings/auxdisplay/modtronix,lcd2s.yaml | 58 +++ .../devicetree/bindings/vendor-prefixes.yaml | 2 + drivers/auxdisplay/Kconfig | 30 ++ drivers/auxdisplay/Makefile | 2 + drivers/auxdisplay/charlcd.c | 412 +++++------------- drivers/auxdisplay/charlcd.h | 86 +++- drivers/auxdisplay/hd44780.c | 120 +++-- drivers/auxdisplay/hd44780_common.c | 361 +++++++++++++++ drivers/auxdisplay/hd44780_common.h | 33 ++ drivers/auxdisplay/lcd2s.c | 403 +++++++++++++++++ drivers/auxdisplay/panel.c | 180 ++++---- 11 files changed, 1237 insertions(+), 450 deletions(-) create mode 100644 Documentation/devicetree/bindings/auxdisplay/modtronix,lcd2s.yaml create mode 100644 drivers/auxdisplay/hd44780_common.c create mode 100644 drivers/auxdisplay/hd44780_common.h create mode 100644 drivers/auxdisplay/lcd2s.c -- 2.28.0