From: vaibhav.hiremath@linaro.org (Vaibhav Hiremath) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH-RESEND 0/3] i2c: core/pxa: Add support for hardware lock Date: Wed, 3 Jun 2015 00:15:28 +0530 [thread overview] Message-ID: <1433270731-23790-1-git-send-email-vaibhav.hiremath@linaro.org> (raw) In-Reply-To: <vaibhav.hiremath@linaro.org> To justify the need for hardware lock, lets take a real usecase scenario - In case of Marvell SoC, PXA910 silicon, both AP and CP are present and these two ARM cores are sharing one pair of I2C pins. In order to keep I2C transaction operated with atomic, hardware lock (RIPC) is required. This patch extends support for atomic operation by adding hardware lock support to the i2c-core. PATCH[1/3] : Core changes for hardware lock PATCH[2/3 & 3/3] : hardware lock support to i2c-pxa bus driver. Link to previous post: http://lkml.iu.edu/hypermail/linux/kernel/1104.3/02352.html http://lkml.iu.edu/hypermail/linux/kernel/1104.3/02353.html http://lkml.iu.edu/hypermail/linux/kernel/1104.3/02354.html TODO: - DT node addition I am using PXA1928 based platform which is still not available in Mainline, so it is based on, below patch-series Link to Rob's patches: https://lkml.org/lkml/2015/5/1/14 https://lkml.org/lkml/2015/5/19/1206 PMIC 88pm860 support http://www.spinics.net/lists/arm-kernel/msg422554.html Vaibhav Hiremath (3): i2c: core: append hardware lock with bus lock i2c: pxa: Add support for hardware lock i2c: pxa: Add pin ctrl support for CP core access drivers/i2c/busses/i2c-pxa.c | 92 ++++++++++++++++++++++++++++++++++++++++++++ drivers/i2c/i2c-core.c | 22 +++++++++-- include/linux/i2c.h | 5 +++ include/linux/i2c/pxa-i2c.h | 4 ++ 4 files changed, 119 insertions(+), 4 deletions(-) -- 1.9.1
WARNING: multiple messages have this Message-ID (diff)
From: Vaibhav Hiremath <vaibhav.hiremath-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> To: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org, Vaibhav Hiremath <vaibhav.hiremath-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> Subject: [PATCH-RESEND 0/3] i2c: core/pxa: Add support for hardware lock Date: Wed, 3 Jun 2015 00:15:28 +0530 [thread overview] Message-ID: <1433270731-23790-1-git-send-email-vaibhav.hiremath@linaro.org> (raw) In-Reply-To: <vaibhav.hiremath-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> To justify the need for hardware lock, lets take a real usecase scenario - In case of Marvell SoC, PXA910 silicon, both AP and CP are present and these two ARM cores are sharing one pair of I2C pins. In order to keep I2C transaction operated with atomic, hardware lock (RIPC) is required. This patch extends support for atomic operation by adding hardware lock support to the i2c-core. PATCH[1/3] : Core changes for hardware lock PATCH[2/3 & 3/3] : hardware lock support to i2c-pxa bus driver. Link to previous post: http://lkml.iu.edu/hypermail/linux/kernel/1104.3/02352.html http://lkml.iu.edu/hypermail/linux/kernel/1104.3/02353.html http://lkml.iu.edu/hypermail/linux/kernel/1104.3/02354.html TODO: - DT node addition I am using PXA1928 based platform which is still not available in Mainline, so it is based on, below patch-series Link to Rob's patches: https://lkml.org/lkml/2015/5/1/14 https://lkml.org/lkml/2015/5/19/1206 PMIC 88pm860 support http://www.spinics.net/lists/arm-kernel/msg422554.html Vaibhav Hiremath (3): i2c: core: append hardware lock with bus lock i2c: pxa: Add support for hardware lock i2c: pxa: Add pin ctrl support for CP core access drivers/i2c/busses/i2c-pxa.c | 92 ++++++++++++++++++++++++++++++++++++++++++++ drivers/i2c/i2c-core.c | 22 +++++++++-- include/linux/i2c.h | 5 +++ include/linux/i2c/pxa-i2c.h | 4 ++ 4 files changed, 119 insertions(+), 4 deletions(-) -- 1.9.1
next reply other threads:[~2015-06-02 18:45 UTC|newest] Thread overview: 125+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <vaibhav.hiremath@linaro.org> 2015-06-02 18:45 ` Vaibhav Hiremath [this message] 2015-06-02 18:45 ` [PATCH-RESEND 0/3] i2c: core/pxa: Add support for hardware lock Vaibhav Hiremath 2015-06-02 18:45 ` [PATCH-RESEND 1/3] i2c: core: append hardware lock with bus lock Vaibhav Hiremath 2015-06-02 18:45 ` Vaibhav Hiremath 2015-06-02 18:45 ` [PATCH-RESEND 2/3] i2c: pxa: Add support for hardware lock Vaibhav Hiremath 2015-06-02 18:45 ` Vaibhav Hiremath 2015-06-02 18:45 ` [PATCH-RESEND 3/3] i2c: pxa: Add pin ctrl support for CP core access Vaibhav Hiremath 2015-06-02 18:45 ` Vaibhav Hiremath 2015-06-16 8:28 ` [PATCH-RESEND 0/3] i2c: core/pxa: Add support for hardware lock Vaibhav Hiremath 2015-06-16 8:28 ` Vaibhav Hiremath 2015-07-07 6:43 ` Vaibhav Hiremath 2015-07-07 6:43 ` Vaibhav Hiremath 2015-10-25 9:52 ` Wolfram Sang 2015-10-25 9:52 ` Wolfram Sang 2015-06-15 15:49 ` [PATCH-V2 00/12] i2c: pxa: Fixes, cleanup and support for pxa910 family Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-06-15 15:49 ` [PATCH-V2 01/12] i2c: pxa: keep i2c irq ON in suspend Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-06-15 15:49 ` [PATCH-V2 02/12] i2c: pxa: No need to set slave addr for i2c master mode reset Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-07-03 20:58 ` Robert Jarzmik 2015-07-03 20:58 ` Robert Jarzmik 2015-06-15 15:49 ` [PATCH-V2 03/12] i2c: pxa: Return I2C_RETRY when timeout in pio mode Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-06-16 5:31 ` Shubhrajyoti Datta 2015-06-16 5:31 ` Shubhrajyoti Datta 2015-06-16 7:41 ` Vaibhav Hiremath 2015-06-16 7:41 ` Vaibhav Hiremath 2015-07-03 21:07 ` Robert Jarzmik 2015-07-03 21:07 ` Robert Jarzmik 2015-06-15 15:49 ` [PATCH-V2 04/12] i2c: pxa: Reset i2c controller on timeout in interrupt and " Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-07-03 15:27 ` Robert Jarzmik 2015-07-03 15:27 ` Robert Jarzmik 2015-07-03 18:13 ` Vaibhav Hiremath 2015-07-03 18:13 ` Vaibhav Hiremath 2015-06-15 15:49 ` [PATCH-V2 05/12] i2c: pxa: Remove compile warnning in 64bit mode Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-06-15 15:49 ` [PATCH-V2 06/12] i2c: pxa: Update debug function to dump more info on error Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-06-15 15:49 ` [PATCH-V2 07/12] i2c:pxa: Use devm_ variants in probe function Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-07-03 15:28 ` Robert Jarzmik 2015-07-03 15:28 ` Robert Jarzmik 2015-07-03 18:14 ` Vaibhav Hiremath 2015-07-03 18:14 ` Vaibhav Hiremath 2015-06-15 15:49 ` [PATCH-V2 08/12] i2c: pxa: enable/disable i2c module across msg xfer Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-07-03 15:28 ` Robert Jarzmik 2015-07-03 15:28 ` Robert Jarzmik 2015-07-03 18:23 ` Vaibhav Hiremath 2015-07-03 18:23 ` Vaibhav Hiremath 2015-07-03 18:48 ` Vaibhav Hiremath 2015-07-03 18:48 ` Vaibhav Hiremath 2015-07-03 19:44 ` Robert Jarzmik 2015-07-03 19:44 ` Robert Jarzmik 2015-06-15 15:49 ` [PATCH-V2 09/12] Documentation: binding: add new property 'disable_after_xfer' to i2c-pxa Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-06-15 15:49 ` [PATCH-V2 10/12] i2c: pxa: Add support for pxa910/988 & new configuration features Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-06-15 15:49 ` [PATCH-V2 11/12] i2c: pxa: Add ILCR (tLow & tHigh) configuration support Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-07-03 15:28 ` Robert Jarzmik 2015-07-03 15:28 ` Robert Jarzmik 2015-07-03 18:17 ` Vaibhav Hiremath 2015-07-03 18:17 ` Vaibhav Hiremath 2015-06-15 15:49 ` [PATCH-V2 12/12] Documentation: binding: add sclk adjustment properties to i2c-pxa Vaibhav Hiremath 2015-06-15 15:49 ` Vaibhav Hiremath 2015-06-16 13:22 ` Rob Herring 2015-06-16 13:22 ` Rob Herring 2015-06-16 14:25 ` Vaibhav Hiremath 2015-06-16 14:25 ` Vaibhav Hiremath 2015-06-29 8:52 ` [PATCH-V2 00/12] i2c: pxa: Fixes, cleanup and support for pxa910 family Vaibhav Hiremath 2015-06-29 8:52 ` Vaibhav Hiremath 2015-07-02 16:54 ` Vaibhav Hiremath 2015-07-02 16:54 ` Vaibhav Hiremath 2015-06-17 18:58 [PATCH-v2 0/3] mfd: 88pm800: Add Device tree support Vaibhav Hiremath 2015-06-17 18:58 ` Vaibhav Hiremath 2015-06-17 18:58 ` [rtc-linux] " Vaibhav Hiremath 2015-06-17 18:58 ` [PATCH-v2 1/3] mfd: 88pm800: Add device " Vaibhav Hiremath 2015-06-17 18:58 ` Vaibhav Hiremath 2015-06-17 18:58 ` [rtc-linux] " Vaibhav Hiremath 2015-06-17 18:58 ` Vaibhav Hiremath 2015-06-17 18:58 ` [PATCH-v2] rtc: 88pm80x: add " Vaibhav Hiremath 2015-06-17 18:58 ` Vaibhav Hiremath 2015-06-17 18:58 ` [rtc-linux] " Vaibhav Hiremath 2015-06-20 0:43 ` Alexandre Belloni 2015-06-20 0:43 ` Alexandre Belloni 2015-06-20 0:43 ` Alexandre Belloni 2015-06-20 0:43 ` Alexandre Belloni 2015-06-25 7:46 ` Vaibhav Hiremath 2015-06-25 7:46 ` Vaibhav Hiremath 2015-06-25 7:46 ` Vaibhav Hiremath 2015-06-25 7:46 ` Vaibhav Hiremath 2015-07-07 6:37 ` Vaibhav Hiremath 2015-07-07 6:37 ` Vaibhav Hiremath 2015-07-07 6:37 ` Vaibhav Hiremath 2015-07-07 6:37 ` Vaibhav Hiremath 2015-06-17 18:58 ` [PATCH-v2 2/3] mfd: 88pm800: Allow configuration of interrupt clear method Vaibhav Hiremath 2015-06-17 18:58 ` Vaibhav Hiremath 2015-06-17 18:58 ` [rtc-linux] " Vaibhav Hiremath 2015-06-17 18:58 ` Vaibhav Hiremath 2015-06-17 18:58 ` [PATCH-v2 3/3] mfd: devicetree: bindings: Add new 88pm800 mfd binding Vaibhav Hiremath 2015-06-17 18:58 ` Vaibhav Hiremath 2015-06-17 18:58 ` [rtc-linux] " Vaibhav Hiremath 2015-06-17 18:58 ` Vaibhav Hiremath 2015-06-23 15:37 ` Rob Herring 2015-06-23 15:37 ` Rob Herring 2015-06-23 15:37 ` [rtc-linux] " Rob Herring 2015-06-23 15:37 ` Rob Herring 2015-06-23 17:02 ` Vaibhav Hiremath 2015-06-23 17:02 ` Vaibhav Hiremath 2015-06-23 17:02 ` [rtc-linux] " Vaibhav Hiremath 2015-06-24 0:29 ` Krzysztof Kozlowski 2015-06-24 0:29 ` Krzysztof Kozlowski 2015-06-24 0:29 ` [rtc-linux] " Krzysztof Kozlowski 2015-06-24 0:29 ` Krzysztof Kozlowski 2015-06-24 5:19 ` Vaibhav Hiremath 2015-06-24 5:19 ` Vaibhav Hiremath 2015-06-24 5:19 ` [rtc-linux] " Vaibhav Hiremath 2015-06-24 5:19 ` Vaibhav Hiremath 2015-06-23 5:07 ` [PATCH-v2 0/3] mfd: 88pm800: Add Device tree support Vaibhav Hiremath 2015-06-23 5:07 ` Vaibhav Hiremath 2015-06-23 5:07 ` [rtc-linux] " Vaibhav Hiremath 2015-06-23 5:07 ` Vaibhav Hiremath
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