Message ID | 20210316202434.27555-1-hhhawa@amazon.com |
---|---|
Headers | show |
Series | Fix pinctrl-single pcs_pin_dbg_show() | expand |
On 3/17/2021 2:27 PM, Andy Shevchenko wrote: > > On Tue, Mar 16, 2021 at 11:24 PM Hanna Hawa <hhhawa@amazon.com> wrote: >> >> An SError was detected when trying to print the supported pins in a > > What SError is? System error: [ 24.257831] SError Interrupt on CPU0, code 0xbf000002 -- SError ... [ 24.257855] Kernel panic - not syncing: Asynchronous SError Interrupt > >> pinctrl device which supports multiple pins per register. This change >> fixes the pcs_pin_dbg_show() in pinctrl-single driver when >> bits_per_mux != 0. In addition move offset calculation and pin offset in > > '!= 0' -> 'is not zero' Will be fixed. > >> register to common function. > > Fixes tag? Sure, will be added. > >> Signed-off-by: Hanna Hawa <hhhawa@amazon.com> >> --- >> drivers/pinctrl/pinctrl-single.c | 66 ++++++++++++++++++++++---------- >> 1 file changed, 45 insertions(+), 21 deletions(-) >> >> diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c >> index f3394517cb2e..434f90c8b1b3 100644 >> --- a/drivers/pinctrl/pinctrl-single.c >> +++ b/drivers/pinctrl/pinctrl-single.c >> @@ -270,20 +270,53 @@ static void __maybe_unused pcs_writel(unsigned val, void __iomem *reg) >> writel(val, reg); >> } >> >> +static unsigned int pcs_pin_reg_offset_get(struct pcs_device *pcs, >> + unsigned int pin) >> +{ >> + unsigned int offset, mux_bytes; > > Offset can be replaced by direct return statements. Ack. > >> + mux_bytes = pcs->width / BITS_PER_BYTE; >> + >> + if (pcs->bits_per_mux) { >> + unsigned int pin_offset_bytes; >> + >> + pin_offset_bytes = (pcs->bits_per_pin * pin) / BITS_PER_BYTE; >> + offset = (pin_offset_bytes / mux_bytes) * mux_bytes; >> + } else { >> + offset = pin * mux_bytes; >> + } >> + >> + return offset; >> +} >> + >> +static unsigned int pcs_pin_shift_reg_get(struct pcs_device *pcs, >> + unsigned int pin) >> +{ >> + return ((pin % (pcs->width / pcs->bits_per_pin)) * pcs->bits_per_pin); > > Too many parentheses. Will remove the extra parentheses. > >> +} >> + >> static void pcs_pin_dbg_show(struct pinctrl_dev *pctldev, >> struct seq_file *s, >> unsigned pin) >> { >> struct pcs_device *pcs; >> - unsigned val, mux_bytes; >> + unsigned int val; >> unsigned long offset; >> size_t pa; >> >> pcs = pinctrl_dev_get_drvdata(pctldev); >> >> - mux_bytes = pcs->width / BITS_PER_BYTE; >> - offset = pin * mux_bytes; >> - val = pcs->read(pcs->base + offset); >> + offset = pcs_pin_reg_offset_get(pcs, pin); >> + >> + if (pcs->bits_per_mux) { >> + unsigned int pin_shift_in_reg = pcs_pin_shift_reg_get(pcs, pin); > >> + val = pcs->read(pcs->base + offset) >> + & (pcs->fmask << pin_shift_in_reg); > > One line? > At least move & to the upper line. > >> + } else { >> + val = pcs->read(pcs->base + offset); > > It's the same as in above branch, why not > > val = read(); > if () > val &= fmask << _reg_get(...); > > ? Agree, looks better Thanks Andy, will send new patchset soon. Thanks, Hanna