| Message ID | 1594098579-25050-7-git-send-email-Anson.Huang@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Support building i.MX ARMv8 platforms clock driver as module | expand |
Quoting Anson Huang (2020-07-06 22:09:39) > Use readl_relaxed() instead of __raw_readl(), and use BIT(x) > instead of (1 << X) to fix below build warning reported by kernel > test robot: > > drivers/clk/imx/clk-imx6sl.c:149:49: warning: Shifting signed 32-bit > value by 31 bits is undefined behaviour [shiftTooManyBitsSigned] > while (!(__raw_readl(anatop_base + PLL_ARM) & BM_PLL_ARM_LOCK)) > > Signed-off-by: Anson Huang <Anson.Huang@nxp.com> > Reported-by: kernel test robot <lkp@intel.com> > --- The subject is poor. Please improve it so that it summarizes the change instead of the reaction to a warning from a robot. > New patch. > --- > drivers/clk/imx/clk-imx6sl.c | 15 ++++++++------- > 1 file changed, 8 insertions(+), 7 deletions(-) > This should come earlier in the series too so that the build warning doesn't come out before this patch is applied.
On Wed, Jul 15, 2020 at 06:00:17PM -0700, Stephen Boyd wrote: > Quoting Anson Huang (2020-07-06 22:09:39) > > Use readl_relaxed() instead of __raw_readl(), and use BIT(x) > > instead of (1 << X) to fix below build warning reported by kernel > > test robot: > > > > drivers/clk/imx/clk-imx6sl.c:149:49: warning: Shifting signed 32-bit > > value by 31 bits is undefined behaviour [shiftTooManyBitsSigned] > > while (!(__raw_readl(anatop_base + PLL_ARM) & BM_PLL_ARM_LOCK)) > > > > Signed-off-by: Anson Huang <Anson.Huang@nxp.com> > > Reported-by: kernel test robot <lkp@intel.com> > > --- > > The subject is poor. Please improve it so that it summarizes the change > instead of the reaction to a warning from a robot. > > > New patch. > > --- > > drivers/clk/imx/clk-imx6sl.c | 15 ++++++++------- > > 1 file changed, 8 insertions(+), 7 deletions(-) > > > > This should come earlier in the series too so that the build warning > doesn't come out before this patch is applied. Anson, Please update the series per request from Stephen. I have dropped the series from my branch. Shawn
diff --git a/drivers/clk/imx/clk-imx6sl.c b/drivers/clk/imx/clk-imx6sl.c index 0f647d1..e69dba1 100644 --- a/drivers/clk/imx/clk-imx6sl.c +++ b/drivers/clk/imx/clk-imx6sl.c @@ -3,6 +3,7 @@ * Copyright 2013-2014 Freescale Semiconductor, Inc. */ +#include <linux/bitfield.h> #include <linux/clk.h> #include <linux/clkdev.h> #include <linux/err.h> @@ -14,19 +15,19 @@ #include "clk.h" #define CCSR 0xc -#define BM_CCSR_PLL1_SW_CLK_SEL (1 << 2) +#define BM_CCSR_PLL1_SW_CLK_SEL BIT(2) #define CACRR 0x10 #define CDHIPR 0x48 -#define BM_CDHIPR_ARM_PODF_BUSY (1 << 16) +#define BM_CDHIPR_ARM_PODF_BUSY BIT(16) #define ARM_WAIT_DIV_396M 2 #define ARM_WAIT_DIV_792M 4 #define ARM_WAIT_DIV_996M 6 #define PLL_ARM 0x0 -#define BM_PLL_ARM_DIV_SELECT (0x7f << 0) -#define BM_PLL_ARM_POWERDOWN (1 << 12) -#define BM_PLL_ARM_ENABLE (1 << 13) -#define BM_PLL_ARM_LOCK (1 << 31) +#define BM_PLL_ARM_DIV_SELECT 0x7f +#define BM_PLL_ARM_POWERDOWN BIT(12) +#define BM_PLL_ARM_ENABLE BIT(13) +#define BM_PLL_ARM_LOCK BIT(31) #define PLL_ARM_DIV_792M 66 static const char *step_sels[] = { "osc", "pll2_pfd2", }; @@ -145,7 +146,7 @@ static void imx6sl_enable_pll_arm(bool enable) val |= BM_PLL_ARM_ENABLE; val &= ~BM_PLL_ARM_POWERDOWN; writel_relaxed(val, anatop_base + PLL_ARM); - while (!(__raw_readl(anatop_base + PLL_ARM) & BM_PLL_ARM_LOCK)) + while (!(readl_relaxed(anatop_base + PLL_ARM) & BM_PLL_ARM_LOCK)) ; } else { writel_relaxed(saved_pll_arm, anatop_base + PLL_ARM);
Use readl_relaxed() instead of __raw_readl(), and use BIT(x) instead of (1 << X) to fix below build warning reported by kernel test robot: drivers/clk/imx/clk-imx6sl.c:149:49: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned] while (!(__raw_readl(anatop_base + PLL_ARM) & BM_PLL_ARM_LOCK)) Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Reported-by: kernel test robot <lkp@intel.com> --- New patch. --- drivers/clk/imx/clk-imx6sl.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)