| Message ID | 1421318753-14960-1-git-send-email-josh.wu@atmel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Jan 15, 2015 at 06:45:53PM +0800, Josh Wu wrote: Was this written by Boris? If so, then it needs a 'From:' line at the start of the body. (Make sure 'Author' is correct in git, then git-format-patch/git-send-email will get it right for you.) > Currently the driver read NFC command registers to get NFC busy flag. > Actually this flag also can be get by reading HSMC_SR register. > > Use the read NFC command registers need mapping a huge memory region. > To save the mapped memory region, we change to check NFC busy flag by > reading HSMC_SR register. Are we actually saving anything yet? You didn't change the requested region yet. > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> > Acked-by: Josh Wu <josh.wu@atmel.com> Since this is passing through your hands, Josh, it should be 'Signed-off-by' not 'Acked-by'. > --- > > drivers/mtd/nand/atmel_nand.c | 3 +-- > drivers/mtd/nand/atmel_nand_nfc.h | 1 + > 2 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c > index 3853597..125330b 100644 > --- a/drivers/mtd/nand/atmel_nand.c > +++ b/drivers/mtd/nand/atmel_nand.c > @@ -1699,8 +1699,7 @@ static int nfc_send_command(struct atmel_nand_host *host, > cmd, addr, cycle0); > > timeout = jiffies + msecs_to_jiffies(NFC_TIME_OUT_MS); > - while (nfc_cmd_readl(NFCADDR_CMD_NFCBUSY, host->nfc->base_cmd_regs) > - & NFCADDR_CMD_NFCBUSY) { > + while (nfc_readl(host->nfc->hsmc_regs, SR) & NFC_SR_BUSY) { > if (time_after(jiffies, timeout)) { > dev_err(host->dev, > "Time out to wait CMD_NFCBUSY ready!\n"); Change the timeout text? > diff --git a/drivers/mtd/nand/atmel_nand_nfc.h b/drivers/mtd/nand/atmel_nand_nfc.h > index 85b8ca6..4d5d262 100644 > --- a/drivers/mtd/nand/atmel_nand_nfc.h > +++ b/drivers/mtd/nand/atmel_nand_nfc.h > @@ -35,6 +35,7 @@ > #define NFC_CTRL_DISABLE (1 << 1) > > #define ATMEL_HSMC_NFC_SR 0x08 /* NFC Status Register */ > +#define NFC_SR_BUSY (1 << 8) > #define NFC_SR_XFR_DONE (1 << 16) > #define NFC_SR_CMD_DONE (1 << 17) > #define NFC_SR_DTOE (1 << 20) Brian
Hi, Brain On 1/21/2015 4:31 AM, Brian Norris wrote: > On Thu, Jan 15, 2015 at 06:45:53PM +0800, Josh Wu wrote: > > Was this written by Boris? yes, Boris write the code snippet. I taken it and format it as a patch. > If so, then it needs a 'From:' line at the > start of the body. (Make sure 'Author' is correct in git, then > git-format-patch/git-send-email will get it right for you.) sounds the proper way. I will do that. > >> Currently the driver read NFC command registers to get NFC busy flag. >> Actually this flag also can be get by reading HSMC_SR register. >> >> Use the read NFC command registers need mapping a huge memory region. >> To save the mapped memory region, we change to check NFC busy flag by >> reading HSMC_SR register. > Are we actually saving anything yet? You didn't change the requested > region yet. After this patch is applied, then we can apply following patch for NFC's dts, reg = < - 0x90000000 0x10000000 /* NFC Command Registers */ + 0x90000000 0x08000000 /* NFC Command Registers */ 0xfc05c000 0x00000070 /* NFC HSMC regs */ 0x00100000 0x00100000 /* NFC SRAM banks */ >; clocks = <&hsmc_clk>; But as this change should go to the at91-dt, so I would like make the nand driver patch is accepted first. Then send out the dts changes. > >> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> >> Acked-by: Josh Wu <josh.wu@atmel.com> > Since this is passing through your hands, Josh, it should be > 'Signed-off-by' not 'Acked-by'. sure, I will change this. > >> --- >> >> drivers/mtd/nand/atmel_nand.c | 3 +-- >> drivers/mtd/nand/atmel_nand_nfc.h | 1 + >> 2 files changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c >> index 3853597..125330b 100644 >> --- a/drivers/mtd/nand/atmel_nand.c >> +++ b/drivers/mtd/nand/atmel_nand.c >> @@ -1699,8 +1699,7 @@ static int nfc_send_command(struct atmel_nand_host *host, >> cmd, addr, cycle0); >> >> timeout = jiffies + msecs_to_jiffies(NFC_TIME_OUT_MS); >> - while (nfc_cmd_readl(NFCADDR_CMD_NFCBUSY, host->nfc->base_cmd_regs) >> - & NFCADDR_CMD_NFCBUSY) { >> + while (nfc_readl(host->nfc->hsmc_regs, SR) & NFC_SR_BUSY) { >> if (time_after(jiffies, timeout)) { >> dev_err(host->dev, >> "Time out to wait CMD_NFCBUSY ready!\n"); > Change the timeout text? I would change this to: "Time out to wait for NFC ready!\n"); > >> diff --git a/drivers/mtd/nand/atmel_nand_nfc.h b/drivers/mtd/nand/atmel_nand_nfc.h >> index 85b8ca6..4d5d262 100644 >> --- a/drivers/mtd/nand/atmel_nand_nfc.h >> +++ b/drivers/mtd/nand/atmel_nand_nfc.h >> @@ -35,6 +35,7 @@ >> #define NFC_CTRL_DISABLE (1 << 1) >> >> #define ATMEL_HSMC_NFC_SR 0x08 /* NFC Status Register */ >> +#define NFC_SR_BUSY (1 << 8) >> #define NFC_SR_XFR_DONE (1 << 16) >> #define NFC_SR_CMD_DONE (1 << 17) >> #define NFC_SR_DTOE (1 << 20) > Brian Thanks. Best Regards, Josh Wu
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index 3853597..125330b 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -1699,8 +1699,7 @@ static int nfc_send_command(struct atmel_nand_host *host, cmd, addr, cycle0); timeout = jiffies + msecs_to_jiffies(NFC_TIME_OUT_MS); - while (nfc_cmd_readl(NFCADDR_CMD_NFCBUSY, host->nfc->base_cmd_regs) - & NFCADDR_CMD_NFCBUSY) { + while (nfc_readl(host->nfc->hsmc_regs, SR) & NFC_SR_BUSY) { if (time_after(jiffies, timeout)) { dev_err(host->dev, "Time out to wait CMD_NFCBUSY ready!\n"); diff --git a/drivers/mtd/nand/atmel_nand_nfc.h b/drivers/mtd/nand/atmel_nand_nfc.h index 85b8ca6..4d5d262 100644 --- a/drivers/mtd/nand/atmel_nand_nfc.h +++ b/drivers/mtd/nand/atmel_nand_nfc.h @@ -35,6 +35,7 @@ #define NFC_CTRL_DISABLE (1 << 1) #define ATMEL_HSMC_NFC_SR 0x08 /* NFC Status Register */ +#define NFC_SR_BUSY (1 << 8) #define NFC_SR_XFR_DONE (1 << 16) #define NFC_SR_CMD_DONE (1 << 17) #define NFC_SR_DTOE (1 << 20)