* [PATCH 1/3] dt-bindings: mmc: fsl-imx-esdhc: add imx6ull compatible string @ 2018-12-20 7:49 BOUGH CHEN 2018-12-20 7:49 ` [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for imx6ull BOUGH CHEN 2018-12-20 7:49 ` [PATCH 3/3] ARM: dts: imx6ull: change to use new compatible "fsl,imx6ull-usdhc" for usdhc BOUGH CHEN 0 siblings, 2 replies; 7+ messages in thread From: BOUGH CHEN @ 2018-12-20 7:49 UTC (permalink / raw) To: ulf.hansson@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, Fabio Estevam, adrian.hunter@intel.com Cc: devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, dl-linux-imx, linux-arm-kernel@lists.infradead.org Add imx6ull compatible string Signed-off-by: Haibo Chen <haibo.chen@nxp.com> --- Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt index 9201a7d..540c65e 100644 --- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt +++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt @@ -15,6 +15,7 @@ Required properties: "fsl,imx6q-usdhc" "fsl,imx6sl-usdhc" "fsl,imx6sx-usdhc" + "fsl,imx6ull-usdhc" "fsl,imx7d-usdhc" "fsl,imx8qxp-usdhc" -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for imx6ull 2018-12-20 7:49 [PATCH 1/3] dt-bindings: mmc: fsl-imx-esdhc: add imx6ull compatible string BOUGH CHEN @ 2018-12-20 7:49 ` BOUGH CHEN 2018-12-22 21:33 ` kbuild test robot 2018-12-27 8:01 ` Adrian Hunter 2018-12-20 7:49 ` [PATCH 3/3] ARM: dts: imx6ull: change to use new compatible "fsl,imx6ull-usdhc" for usdhc BOUGH CHEN 1 sibling, 2 replies; 7+ messages in thread From: BOUGH CHEN @ 2018-12-20 7:49 UTC (permalink / raw) To: ulf.hansson@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, Fabio Estevam, adrian.hunter@intel.com Cc: devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, dl-linux-imx, linux-arm-kernel@lists.infradead.org i.MX6ULL has errata ERR010450, point out that due to SOC I/O timing limitation, for eMMC HS200 and SD/SDIO 3.0 SDR104, the clock rate can't exceed 150MHz. And for eMMC DDR52 and SD/SDIO DDR50 mode, the clock rate can't exceed 45MHz. This patch add this limit for imx6ull. Signed-off-by: Haibo Chen <haibo.chen@nxp.com> --- drivers/mmc/host/sdhci-esdhc-imx.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index d0d3193..75a2484 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -138,7 +138,11 @@ #define ESDHC_FLAG_HS200 BIT(8) /* The IP supports HS400 mode */ #define ESDHC_FLAG_HS400 BIT(9) - +/* The IP has errata ERR010450 + * uSDHC: Due to the I/O timing limit, for SDR mode, SD card clock can't + * exceed 150MHz, for DDR mode, SD card clock can't exceed 45MHz. + */ +#define ESDHC_FLAG_ERR010450 BIT(10) /* A clock frequency higher than this rate requires strobe dll control */ #define ESDHC_STROBE_DLL_CLK_FREQ 100000000 @@ -177,6 +181,12 @@ struct esdhc_soc_data { | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200, }; +static struct esdhc_soc_data usdhc_imx6ull_data = { + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING + | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 + | ESDHC_FLAG_ERR010450, +}; + static struct esdhc_soc_data usdhc_imx7d_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 @@ -227,6 +237,7 @@ struct pltfm_imx_data { { .compatible = "fsl,imx6sx-usdhc", .data = &usdhc_imx6sx_data, }, { .compatible = "fsl,imx6sl-usdhc", .data = &usdhc_imx6sl_data, }, { .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, }, + { .compatible = "fsl,imx6ull-usdhc", .data = &usdhc_imx6ull_data, }, { .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, }, { /* sentinel */ } }; @@ -733,6 +744,12 @@ static inline void esdhc_pltfm_set_clock(struct sdhci_host *host, | ESDHC_CLOCK_MASK); sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL); + if (imx_data->socdata->flags & ESDHC_FLAG_ERR010450) { + if (imx_data->is_ddr) + clock = clock > 45000000 ? 45000000 : clock; + else + clock = clock > 150000000 ? 150000000 : clock; + while (host_clock / (16 * pre_div * ddr_pre_div) > clock && pre_div < 256) pre_div *= 2; -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for imx6ull 2018-12-20 7:49 ` [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for imx6ull BOUGH CHEN @ 2018-12-22 21:33 ` kbuild test robot 2018-12-27 8:01 ` Adrian Hunter 1 sibling, 0 replies; 7+ messages in thread From: kbuild test robot @ 2018-12-22 21:33 UTC (permalink / raw) To: BOUGH CHEN Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, ulf.hansson@linaro.org, s.hauer@pengutronix.de, linux-mmc@vger.kernel.org, adrian.hunter@intel.com, robh+dt@kernel.org, kbuild-all, kernel@pengutronix.de, Fabio Estevam, shawnguo@kernel.org, linux-arm-kernel@lists.infradead.org, dl-linux-imx [-- Attachment #1: Type: text/plain, Size: 7667 bytes --] Hi BOUGH, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on ulf.hansson-mmc/next] [also build test WARNING on v4.20-rc7 next-20181221] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/BOUGH-CHEN/dt-bindings-mmc-fsl-imx-esdhc-add-imx6ull-compatible-string/20181223-011123 base: git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git next config: arm-imx_v6_v7_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=arm All warnings (new ones prefixed by >>): drivers/mmc/host/sdhci-esdhc-imx.c:1511:24: error: initializer element is not constant module_platform_driver(sdhci_esdhc_imx_driver); ^ include/linux/init.h:195:50: note: in definition of macro '___define_initcall' __attribute__((__section__(#__sec ".init"))) = fn; ^~ include/linux/init.h:227:30: note: in expansion of macro '__define_initcall' #define device_initcall(fn) __define_initcall(fn, 6) ^~~~~~~~~~~~~~~~~ include/linux/init.h:232:24: note: in expansion of macro 'device_initcall' #define __initcall(fn) device_initcall(fn) ^~~~~~~~~~~~~~~ include/linux/module.h:87:24: note: in expansion of macro '__initcall' #define module_init(x) __initcall(x); ^~~~~~~~~~ include/linux/device.h:1615:1: note: in expansion of macro 'module_init' module_init(__driver##_init); \ ^~~~~~~~~~~ include/linux/platform_device.h:229:2: note: in expansion of macro 'module_driver' module_driver(__platform_driver, platform_driver_register, \ ^~~~~~~~~~~~~ drivers/mmc/host/sdhci-esdhc-imx.c:1511:1: note: in expansion of macro 'module_platform_driver' module_platform_driver(sdhci_esdhc_imx_driver); ^~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/mmc/host.h:14:0, from drivers/mmc/host/sdhci-esdhc-imx.c:17: drivers/mmc/host/sdhci-esdhc-imx.c:1511:24: error: invalid storage class for function 'sdhci_esdhc_imx_driver_exit' module_platform_driver(sdhci_esdhc_imx_driver); ^ include/linux/device.h:1616:20: note: in definition of macro 'module_driver' static void __exit __driver##_exit(void) \ ^~~~~~~~ drivers/mmc/host/sdhci-esdhc-imx.c:1511:1: note: in expansion of macro 'module_platform_driver' module_platform_driver(sdhci_esdhc_imx_driver); ^~~~~~~~~~~~~~~~~~~~~~ include/linux/device.h:1616:1: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] static void __exit __driver##_exit(void) \ ^ include/linux/platform_device.h:229:2: note: in expansion of macro 'module_driver' module_driver(__platform_driver, platform_driver_register, \ ^~~~~~~~~~~~~ drivers/mmc/host/sdhci-esdhc-imx.c:1511:1: note: in expansion of macro 'module_platform_driver' module_platform_driver(sdhci_esdhc_imx_driver); ^~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/io.h:22:0, from drivers/mmc/host/sdhci-esdhc-imx.c:11: drivers/mmc/host/sdhci-esdhc-imx.c:1511:24: error: initializer element is not constant module_platform_driver(sdhci_esdhc_imx_driver); ^ include/linux/init.h:235:50: note: in definition of macro '__exitcall' static exitcall_t __exitcall_##fn __exit_call = fn ^~ include/linux/device.h:1620:1: note: in expansion of macro 'module_exit' module_exit(__driver##_exit); ^~~~~~~~~~~ include/linux/platform_device.h:229:2: note: in expansion of macro 'module_driver' module_driver(__platform_driver, platform_driver_register, \ ^~~~~~~~~~~~~ drivers/mmc/host/sdhci-esdhc-imx.c:1511:1: note: in expansion of macro 'module_platform_driver' module_platform_driver(sdhci_esdhc_imx_driver); ^~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/module.h:18:0, from drivers/mmc/host/sdhci-esdhc-imx.c:15: include/linux/moduleparam.h:28:3: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] struct __UNIQUE_ID(name) {} ^ include/linux/module.h:161:32: note: in expansion of macro '__MODULE_INFO' #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) ^~~~~~~~~~~~~ include/linux/module.h:208:42: note: in expansion of macro 'MODULE_INFO' #define MODULE_DESCRIPTION(_description) MODULE_INFO(description, _description) ^~~~~~~~~~~ drivers/mmc/host/sdhci-esdhc-imx.c:1513:1: note: in expansion of macro 'MODULE_DESCRIPTION' MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC"); ^~~~~~~~~~~~~~~~~~ In file included from <command-line>:0:0: include/linux/compiler-gcc.h:75:45: error: expected declaration or statement at end of input #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) ^ include/linux/compiler_types.h:53:23: note: in definition of macro '___PASTE' #define ___PASTE(a,b) a##b ^ include/linux/compiler-gcc.h:75:29: note: in expansion of macro '__PASTE' #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) ^~~~~~~ include/linux/compiler_types.h:54:22: note: in expansion of macro '___PASTE' #define __PASTE(a,b) ___PASTE(a,b) ^~~~~~~~ include/linux/compiler-gcc.h:75:37: note: in expansion of macro '__PASTE' #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) ^~~~~~~ include/linux/moduleparam.h:28:10: note: in expansion of macro '__UNIQUE_ID' struct __UNIQUE_ID(name) {} ^~~~~~~~~~~ include/linux/module.h:161:32: note: in expansion of macro '__MODULE_INFO' #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) ^~~~~~~~~~~~~ include/linux/module.h:199:34: note: in expansion of macro 'MODULE_INFO' #define MODULE_LICENSE(_license) MODULE_INFO(license, _license) ^~~~~~~~~~~ >> drivers/mmc/host/sdhci-esdhc-imx.c:1515:1: note: in expansion of macro 'MODULE_LICENSE' MODULE_LICENSE("GPL v2"); ^~~~~~~~~~~~~~ vim +/MODULE_LICENSE +1515 drivers/mmc/host/sdhci-esdhc-imx.c 85d6509dc8 Shawn Guo 2011-05-27 1512 85d6509dc8 Shawn Guo 2011-05-27 1513 MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC"); 035ff831cd Wolfram Sang 2015-04-20 1514 MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>"); 85d6509dc8 Shawn Guo 2011-05-27 @1515 MODULE_LICENSE("GPL v2"); :::::: The code at line 1515 was first introduced by commit :::::: 85d6509dc8ca24b2b652863ef7a75622ddca17d6 mmc: sdhci: make sdhci-pltfm device drivers self registered :::::: TO: Shawn Guo <shawn.guo@linaro.org> :::::: CC: Chris Ball <cjb@laptop.org> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation [-- Attachment #2: .config.gz --] [-- Type: application/gzip, Size: 33894 bytes --] [-- Attachment #3: Type: text/plain, Size: 176 bytes --] _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for imx6ull 2018-12-20 7:49 ` [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for imx6ull BOUGH CHEN 2018-12-22 21:33 ` kbuild test robot @ 2018-12-27 8:01 ` Adrian Hunter 2018-12-27 12:22 ` Russell King - ARM Linux 1 sibling, 1 reply; 7+ messages in thread From: Adrian Hunter @ 2018-12-27 8:01 UTC (permalink / raw) To: BOUGH CHEN, ulf.hansson@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, Fabio Estevam Cc: devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, dl-linux-imx, linux-arm-kernel@lists.infradead.org On 20/12/18 9:49 AM, BOUGH CHEN wrote: > i.MX6ULL has errata ERR010450, point out that due to SOC I/O > timing limitation, for eMMC HS200 and SD/SDIO 3.0 SDR104, the > clock rate can't exceed 150MHz. And for eMMC DDR52 and SD/SDIO > DDR50 mode, the clock rate can't exceed 45MHz. > > This patch add this limit for imx6ull. > > Signed-off-by: Haibo Chen <haibo.chen@nxp.com> Apart from the kbuild test robot complaints (do they need to be fixed?): Acked-by: Adrian Hunter <adrian.hunter@intel.com> > --- > drivers/mmc/host/sdhci-esdhc-imx.c | 19 ++++++++++++++++++- > 1 file changed, 18 insertions(+), 1 deletion(-) > > diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c > index d0d3193..75a2484 100644 > --- a/drivers/mmc/host/sdhci-esdhc-imx.c > +++ b/drivers/mmc/host/sdhci-esdhc-imx.c > @@ -138,7 +138,11 @@ > #define ESDHC_FLAG_HS200 BIT(8) > /* The IP supports HS400 mode */ > #define ESDHC_FLAG_HS400 BIT(9) > - > +/* The IP has errata ERR010450 > + * uSDHC: Due to the I/O timing limit, for SDR mode, SD card clock can't > + * exceed 150MHz, for DDR mode, SD card clock can't exceed 45MHz. > + */ > +#define ESDHC_FLAG_ERR010450 BIT(10) > /* A clock frequency higher than this rate requires strobe dll control */ > #define ESDHC_STROBE_DLL_CLK_FREQ 100000000 > > @@ -177,6 +181,12 @@ struct esdhc_soc_data { > | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200, > }; > > +static struct esdhc_soc_data usdhc_imx6ull_data = { > + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING > + | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 > + | ESDHC_FLAG_ERR010450, > +}; > + > static struct esdhc_soc_data usdhc_imx7d_data = { > .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING > | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 > @@ -227,6 +237,7 @@ struct pltfm_imx_data { > { .compatible = "fsl,imx6sx-usdhc", .data = &usdhc_imx6sx_data, }, > { .compatible = "fsl,imx6sl-usdhc", .data = &usdhc_imx6sl_data, }, > { .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, }, > + { .compatible = "fsl,imx6ull-usdhc", .data = &usdhc_imx6ull_data, }, > { .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, }, > { /* sentinel */ } > }; > @@ -733,6 +744,12 @@ static inline void esdhc_pltfm_set_clock(struct sdhci_host *host, > | ESDHC_CLOCK_MASK); > sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL); > > + if (imx_data->socdata->flags & ESDHC_FLAG_ERR010450) { > + if (imx_data->is_ddr) > + clock = clock > 45000000 ? 45000000 : clock; > + else > + clock = clock > 150000000 ? 150000000 : clock; > + > while (host_clock / (16 * pre_div * ddr_pre_div) > clock && > pre_div < 256) > pre_div *= 2; > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for imx6ull 2018-12-27 8:01 ` Adrian Hunter @ 2018-12-27 12:22 ` Russell King - ARM Linux 2018-12-28 2:40 ` BOUGH CHEN 0 siblings, 1 reply; 7+ messages in thread From: Russell King - ARM Linux @ 2018-12-27 12:22 UTC (permalink / raw) To: Adrian Hunter Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, ulf.hansson@linaro.org, s.hauer@pengutronix.de, linux-mmc@vger.kernel.org, BOUGH CHEN, robh+dt@kernel.org, dl-linux-imx, kernel@pengutronix.de, Fabio Estevam, shawnguo@kernel.org, linux-arm-kernel@lists.infradead.org On Thu, Dec 27, 2018 at 10:01:24AM +0200, Adrian Hunter wrote: > On 20/12/18 9:49 AM, BOUGH CHEN wrote: > > i.MX6ULL has errata ERR010450, point out that due to SOC I/O > > timing limitation, for eMMC HS200 and SD/SDIO 3.0 SDR104, the > > clock rate can't exceed 150MHz. And for eMMC DDR52 and SD/SDIO > > DDR50 mode, the clock rate can't exceed 45MHz. > > > > This patch add this limit for imx6ull. > > > > Signed-off-by: Haibo Chen <haibo.chen@nxp.com> > > Apart from the kbuild test robot complaints (do they need to be fixed?): > > Acked-by: Adrian Hunter <adrian.hunter@intel.com> Nacked-by: Russell King <rmk+kernel@armlinux.org.uk> The kbuild test robot complaints do need to be fixed first. They're confusing because GCC produces quite a lot of garbage in its error messages now. If you look at the patch, there's a hunk that has: + if (imx_data->socdata->flags & ESDHC_FLAG_ERR010450) { + if (imx_data->is_ddr) + clock = clock > 45000000 ? 45000000 : clock; + else + clock = clock > 150000000 ? 150000000 : clock; + which is missing a closing brace. This patch could not have been build tested before it was mailed to the list, and the test robot is highlighting that fact. It may also be a good idea to encourage a different approach to the above anyway: if (imx_data->socdata->flags & ESDHC_FLAG_ERR010450) { unsigned long max_clock; max_clock = imx_data->is_ddr ? 45000000 : 150000000; clock = max(clock, max_clock); } rather than open-coding the max() stuff in the driver. Thanks. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 7+ messages in thread
* RE: [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for imx6ull 2018-12-27 12:22 ` Russell King - ARM Linux @ 2018-12-28 2:40 ` BOUGH CHEN 0 siblings, 0 replies; 7+ messages in thread From: BOUGH CHEN @ 2018-12-28 2:40 UTC (permalink / raw) To: Russell King - ARM Linux, Adrian Hunter Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, ulf.hansson@linaro.org, s.hauer@pengutronix.de, linux-mmc@vger.kernel.org, robh+dt@kernel.org, dl-linux-imx, kernel@pengutronix.de, Fabio Estevam, shawnguo@kernel.org, linux-arm-kernel@lists.infradead.org > -----Original Message----- > From: Russell King - ARM Linux [mailto:linux@armlinux.org.uk] > Sent: 2018年12月27日 20:23 > To: Adrian Hunter <adrian.hunter@intel.com> > Cc: BOUGH CHEN <haibo.chen@nxp.com>; ulf.hansson@linaro.org; > robh+dt@kernel.org; mark.rutland@arm.com; shawnguo@kernel.org; > s.hauer@pengutronix.de; kernel@pengutronix.de; Fabio Estevam > <fabio.estevam@nxp.com>; devicetree@vger.kernel.org; > linux-mmc@vger.kernel.org; dl-linux-imx <linux-imx@nxp.com>; > linux-arm-kernel@lists.infradead.org > Subject: Re: [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for > imx6ull > > On Thu, Dec 27, 2018 at 10:01:24AM +0200, Adrian Hunter wrote: > > On 20/12/18 9:49 AM, BOUGH CHEN wrote: > > > i.MX6ULL has errata ERR010450, point out that due to SOC I/O timing > > > limitation, for eMMC HS200 and SD/SDIO 3.0 SDR104, the clock rate > > > can't exceed 150MHz. And for eMMC DDR52 and SD/SDIO > > > DDR50 mode, the clock rate can't exceed 45MHz. > > > > > > This patch add this limit for imx6ull. > > > > > > Signed-off-by: Haibo Chen <haibo.chen@nxp.com> > > > > Apart from the kbuild test robot complaints (do they need to be fixed?): > > > > Acked-by: Adrian Hunter <adrian.hunter@intel.com> > > Nacked-by: Russell King <rmk+kernel@armlinux.org.uk> > > The kbuild test robot complaints do need to be fixed first. They're confusing > because GCC produces quite a lot of garbage in its error messages now. If > you look at the patch, there's a hunk that has: > > + if (imx_data->socdata->flags & ESDHC_FLAG_ERR010450) { > + if (imx_data->is_ddr) > + clock = clock > 45000000 ? 45000000 : clock; > + else > + clock = clock > 150000000 ? 150000000 : clock; > + > > which is missing a closing brace. This patch could not have been build tested > before it was mailed to the list, and the test robot is highlighting that fact. > I'm really sorry about that. Thanks for point out that, I will double check my patch when I mail to the list next time. > It may also be a good idea to encourage a different approach to the above > anyway: > > if (imx_data->socdata->flags & ESDHC_FLAG_ERR010450) { > unsigned long max_clock; > > max_clock = imx_data->is_ddr ? 45000000 : 150000000; > > clock = max(clock, max_clock); > } > > rather than open-coding the max() stuff in the driver. Thanks for giving such a good suggestion, I will take care of it, with a little change: clock = min(clock, max_clock); Best Regard Bough Chen > > Thanks. > > -- > RMK's Patch system: > https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww. > armlinux.org.uk%2Fdeveloper%2Fpatches%2F&data=02%7C01%7Chaibo. > chen%40nxp.com%7C13ae59760de24de29a7c08d66bf61174%7C686ea1d3bc2 > b4c6fa92cd99c5c301635%7C0%7C0%7C636815101937146642&sdata=UP > S7z2UTLpfgqgyWFPM%2FyXP%2BQu1qULoavFOBLFWkQjw%3D&reserved > =0 > FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps > up According to speedtest.net: 11.9Mbps down 500kbps up _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 3/3] ARM: dts: imx6ull: change to use new compatible "fsl,imx6ull-usdhc" for usdhc 2018-12-20 7:49 [PATCH 1/3] dt-bindings: mmc: fsl-imx-esdhc: add imx6ull compatible string BOUGH CHEN 2018-12-20 7:49 ` [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for imx6ull BOUGH CHEN @ 2018-12-20 7:49 ` BOUGH CHEN 1 sibling, 0 replies; 7+ messages in thread From: BOUGH CHEN @ 2018-12-20 7:49 UTC (permalink / raw) To: ulf.hansson@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, Fabio Estevam, adrian.hunter@intel.com Cc: devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, dl-linux-imx, linux-arm-kernel@lists.infradead.org i.MX6ULL has errata ERR010450, there is I/O timing limitation, for SDR mode, SD card clock can't exceed 150MHz, for DDR mode, SD card clock can't exceed 45MHz. This patch change to use the new compatible "fsl,imx6ull-usdhc" to follow this limitation. Signed-off-by: Haibo Chen <haibo.chen@nxp.com> --- arch/arm/boot/dts/imx6ull.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/boot/dts/imx6ull.dtsi b/arch/arm/boot/dts/imx6ull.dtsi index f3668fe..4ad5828 100644 --- a/arch/arm/boot/dts/imx6ull.dtsi +++ b/arch/arm/boot/dts/imx6ull.dtsi @@ -30,6 +30,14 @@ >; }; +&usdhc1 { + compatible = "fsl,imx6ull-usdhc", "fsl,imx6sx-usdhc"; +}; + +&usdhc2 { + compatible = "fsl,imx6ull-usdhc", "fsl,imx6sx-usdhc"; +}; + / { soc { aips3: aips-bus@2200000 { -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply related [flat|nested] 7+ messages in thread
end of thread, other threads:[~2018-12-28 2:41 UTC | newest] Thread overview: 7+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2018-12-20 7:49 [PATCH 1/3] dt-bindings: mmc: fsl-imx-esdhc: add imx6ull compatible string BOUGH CHEN 2018-12-20 7:49 ` [PATCH 2/3] mmc: sdhci-esdhc-imx: add SD clock limitation for imx6ull BOUGH CHEN 2018-12-22 21:33 ` kbuild test robot 2018-12-27 8:01 ` Adrian Hunter 2018-12-27 12:22 ` Russell King - ARM Linux 2018-12-28 2:40 ` BOUGH CHEN 2018-12-20 7:49 ` [PATCH 3/3] ARM: dts: imx6ull: change to use new compatible "fsl,imx6ull-usdhc" for usdhc BOUGH CHEN
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