On 23.10.19 20:21, Robert Beckett wrote:
> From: Martin Fuzzey <martin.fuzzey@flowbird.group>
>
> Some PMICs (such as the DA9063) have non-contiguous register maps.
> Attempting to read the non implemented registers returns an error
> rather than a dummy value which causes 'pmic dump' to terminate
> prematurely.
>
> Fix this by allowing the PMIC driver to return -ENODATA for such
> registers, which will then be displayed as '--' by pmic dump.
>
> Use a single error code rather than any error code so that
> we can distinguish between a hardware failure reading the PMIC
> and a non implemented register known to the driver.
>
> Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group>
> Signed-off-by: Robert Beckett <bob.beck...@collabora.com>
Reviewed-by: Frieder Schrempf <frieder.schre...@kontron.de>
Tested-by: Frieder Schrempf <frieder.schre...@kontron.de>
> ---
> cmd/pmic.c | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/cmd/pmic.c b/cmd/pmic.c
> index e46d813a70..2400bfb601 100644
> --- a/cmd/pmic.c
> +++ b/cmd/pmic.c
> @@ -95,7 +95,7 @@ static int do_dump(cmd_tbl_t *cmdtp, int flag, int argc,
> char * const argv[])
>
> for (reg = 0; reg < pmic_reg_count(dev); reg++) {
> ret = pmic_reg_read(dev, reg);
> - if (ret < 0) {
> + if (ret < 0 && ret != -ENODATA) {
> printf("Can't read register: %d\n", reg);
> return failure(ret);
> }
> @@ -103,7 +103,15 @@ static int do_dump(cmd_tbl_t *cmdtp, int flag, int argc,
> char * const argv[])
> if (!(reg % 16))
> printf("\n0x%02x: ", reg);
>
> - printf(fmt, ret);
> + if (ret == -ENODATA) {
> + int i;
> +
> + for (i = 0; i < priv->trans_len; i++)
> + puts("--");
> + puts(" ");
> + } else {
> + printf(fmt, ret);
> + }
> }
> printf("\n");
>
>
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