Hi all, the linux patches depended by RCPM driver,FlexTimer driver and FlexTimer dts, need apply these patches as follows:
1. RCPM driver: https://patchwork.kernel.org/series/162731/mbox/(https://patchwork.kernel.org/patch/11105279/) 2. FlexTimer dts: https://lore.kernel.org/patchwork/series/405653/mbox/(https://lore.kernel.org/patchwork/patch/1112493/) 3. FlexTimer driver: https://patchwork.ozlabs.org/series/124718/mbox/(https://patchwork.ozlabs.org/patch/1145999/) https://patchwork.ozlabs.org/series/126942/mbox/(https://patchwork.ozlabs.org/patch/1152085/) 4. Adjust drivers/soc/fsl/Makefile: remove the line 'obj-y += ftm_alarm.o' in drivers/soc/fsl/Makefile to resolve a compilation error 获取 Outlook for Android<https://aka.ms/ghei36> ________________________________ From: Biwen Li <biwen...@nxp.com> Sent: Tuesday, September 24, 2019 10:45:46 AM To: Leo Li <leoyang...@nxp.com>; shawn...@kernel.org <shawn...@kernel.org>; robh...@kernel.org <robh...@kernel.org>; mark.rutl...@arm.com <mark.rutl...@arm.com>; Ran Wang <ran.wan...@nxp.com> Cc: linuxppc-dev@lists.ozlabs.org <linuxppc-dev@lists.ozlabs.org>; linux-arm-ker...@lists.infradead.org <linux-arm-ker...@lists.infradead.org>; linux-ker...@vger.kernel.org <linux-ker...@vger.kernel.org>; devicet...@vger.kernel.org <devicet...@vger.kernel.org>; Biwen Li <biwen...@nxp.com> Subject: [v3,1/3] soc: fsl: handle RCPM errata A-008646 on SoC LS1021A Description: - Reading configuration register RCPM_IPPDEXPCR1 always return zero Workaround: - Save register RCPM_IPPDEXPCR1's value to register SCFG_SPARECR8.(uboot's psci also need reading value from the register SCFG_SPARECR8 to set register RCPM_IPPDEXPCR1) Impact: - FlexTimer module will cannot wakeup system in deep sleep on SoC LS1021A Signed-off-by: Biwen Li <biwen...@nxp.com> --- Change in v3: - update commit message - rename property name fsl,rcpm-scfg -> fsl,ippdexpcr-alt-addr Change in v2: - fix stype problems drivers/soc/fsl/rcpm.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/soc/fsl/rcpm.c b/drivers/soc/fsl/rcpm.c index 82c0ad5e663e..7f42b17d3f29 100644 --- a/drivers/soc/fsl/rcpm.c +++ b/drivers/soc/fsl/rcpm.c @@ -13,6 +13,8 @@ #include <linux/slab.h> #include <linux/suspend.h> #include <linux/kernel.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> #define RCPM_WAKEUP_CELL_MAX_SIZE 7 @@ -29,6 +31,9 @@ static int rcpm_pm_prepare(struct device *dev) struct rcpm *rcpm; u32 value[RCPM_WAKEUP_CELL_MAX_SIZE + 1], tmp; int i, ret, idx; + struct regmap * scfg_addr_regmap = NULL; + u32 reg_offset[RCPM_WAKEUP_CELL_MAX_SIZE + 1]; + u32 reg_value = 0; rcpm = dev_get_drvdata(dev); if (!rcpm) @@ -63,6 +68,22 @@ static int rcpm_pm_prepare(struct device *dev) tmp |= value[i + 1]; iowrite32be(tmp, rcpm->ippdexpcr_base + i * 4); } + /* Workaround of errata A-008646 on SoC LS1021A: There is a bug of + * register ippdexpcr1. Reading configuration register RCPM_IPPDEXPCR1 + * always return zero. So save ippdexpcr1's value to register SCFG_SPARECR8. + * And the value of ippdexpcr1 will be read from SCFG_SPARECR8. + */ + scfg_addr_regmap = syscon_regmap_lookup_by_phandle(np, "fsl,ippdexpcr-alt-addr"); + if (scfg_addr_regmap) { + if (of_property_read_u32_array(dev->of_node, + "fsl,ippdexpcr-alt-addr", reg_offset, rcpm->wakeup_cells + 1)) { + scfg_addr_regmap = NULL; + continue; + } + regmap_read(scfg_addr_regmap, reg_offset[i + 1], ®_value); + /* Write value to register SCFG_SPARECR8 */ + regmap_write(scfg_addr_regmap, reg_offset[i + 1], tmp | reg_value); + } } } } while (ws = wakeup_source_get_next(ws)); -- 2.17.1
