On Thu, Jul 7, 2022 at 9:30 AM Christian Marangi <ansuelsmth@xxxxxxxxx> wrote:
>
> Allow sfpb-mutex to use mmio in addition to syscon.
>
> Signed-off-by: Christian Marangi <ansuelsmth@xxxxxxxxx>
> ---
> drivers/hwspinlock/qcom_hwspinlock.c | 32 ++++++++++++++++++++++------
> 1 file changed, 25 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/hwspinlock/qcom_hwspinlock.c b/drivers/hwspinlock/qcom_hwspinlock.c
> index 364710966665..23c913095bd0 100644
> --- a/drivers/hwspinlock/qcom_hwspinlock.c
> +++ b/drivers/hwspinlock/qcom_hwspinlock.c
> @@ -19,6 +19,11 @@
> #define QCOM_MUTEX_APPS_PROC_ID 1
> #define QCOM_MUTEX_NUM_LOCKS 32
>
> +struct qcom_hwspinlock_of_data {
> + u32 offset;
> + u32 stride;
> +};
> +
> static int qcom_hwspinlock_trylock(struct hwspinlock *lock)
> {
> struct regmap_field *field = lock->priv;
> @@ -63,9 +68,20 @@ static const struct hwspinlock_ops qcom_hwspinlock_ops = {
> .unlock = qcom_hwspinlock_unlock,
> };
>
> +static const struct qcom_hwspinlock_of_data of_sfpb_mutex = {
> + .offset = 0x4,
> + .stride = 0x4,
> +};
> +
> +/* All modern platform has offset 0 and stride of 4k */
> +static const struct qcom_hwspinlock_of_data of_tcsr_mutex = {
> + .offset = 0,
> + .stride = 0x1000,
> +};
> +
> static const struct of_device_id qcom_hwspinlock_of_match[] = {
> - { .compatible = "qcom,sfpb-mutex" },
> - { .compatible = "qcom,tcsr-mutex" },
> + { .compatible = "qcom,sfpb-mutex", .data = &of_sfpb_mutex },
> + { .compatible = "qcom,tcsr-mutex", .data = &of_tcsr_mutex },
> { }
> };
> MODULE_DEVICE_TABLE(of, qcom_hwspinlock_of_match);
> @@ -101,7 +117,7 @@ static struct regmap *qcom_hwspinlock_probe_syscon(struct platform_device *pdev,
> return regmap;
> }
>
> -static const struct regmap_config tcsr_mutex_config = {
> +static const struct regmap_config qcom_hwspinlock_mmio_config = {
> .reg_bits = 32,
> .reg_stride = 4,
> .val_bits = 32,
> @@ -112,18 +128,20 @@ static const struct regmap_config tcsr_mutex_config = {
> static struct regmap *qcom_hwspinlock_probe_mmio(struct platform_device *pdev,
> u32 *offset, u32 *stride)
> {
> + const struct qcom_hwspinlock_of_data *data;
> struct device *dev = &pdev->dev;
> void __iomem *base;
>
> - /* All modern platform has offset 0 and stride of 4k */
> - *offset = 0;
> - *stride = 0x1000;
> + data = of_device_get_match_data(dev);
Nit: better to validate the return value though this is a rare case.
if (!data)
return -ENODEV;
Otherwise LGTM.
Reviewed-by: Baolin Wang <baolin.wang7@xxxxxxxxx>
--
Baolin Wang
