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| author | AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> | 2023-01-04 12:53:40 +0100 |
|---|---|---|
| committer | Mathieu Poirier <mathieu.poirier@linaro.org> | 2023-01-04 15:43:38 -0700 |
| commit | fad151d52ba4075f19573a91ada0c636eb96a349 (patch) | |
| tree | 897bdb9c168aa6f8196be0f341b4f3a837f01abb /drivers/remoteproc | |
| parent | e46ceea3148163166ef9b7bcac578e72dd30c064 (diff) | |
| download | linux-fad151d52ba4075f19573a91ada0c636eb96a349.tar.gz | |
remoteproc/mtk_scp: Use readl_poll_timeout_atomic() for polling
Convert the usage of an open-coded custom tight poll while loop
with the provided readl_poll_timeout_atomic() macro.
This cleanup brings no functional change.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230104115341.320951-2-angelogioacchino.delregno@collabora.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/mtk_scp_ipi.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c index 4c0d121c2f54df..af47504bdb617b 100644 --- a/drivers/remoteproc/mtk_scp_ipi.c +++ b/drivers/remoteproc/mtk_scp_ipi.c @@ -6,13 +6,17 @@ #include <linux/clk.h> #include <linux/err.h> #include <linux/io.h> +#include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/time64.h> #include <linux/remoteproc/mtk_scp.h> #include "mtk_common.h" +#define SCP_TIMEOUT_US (2000 * USEC_PER_MSEC) + /** * scp_ipi_register() - register an ipi function * @@ -157,6 +161,7 @@ int scp_ipi_send(struct mtk_scp *scp, u32 id, void *buf, unsigned int len, { struct mtk_share_obj __iomem *send_obj = scp->send_buf; unsigned long timeout; + u32 val; int ret; if (WARN_ON(id <= SCP_IPI_INIT) || WARN_ON(id >= SCP_IPI_MAX) || @@ -173,14 +178,12 @@ int scp_ipi_send(struct mtk_scp *scp, u32 id, void *buf, unsigned int len, mutex_lock(&scp->send_lock); /* Wait until SCP receives the last command */ - timeout = jiffies + msecs_to_jiffies(2000); - do { - if (time_after(jiffies, timeout)) { - dev_err(scp->dev, "%s: IPI timeout!\n", __func__); - ret = -ETIMEDOUT; - goto unlock_mutex; - } - } while (readl(scp->reg_base + scp->data->host_to_scp_reg)); + ret = readl_poll_timeout_atomic(scp->reg_base + scp->data->host_to_scp_reg, + val, !val, 0, SCP_TIMEOUT_US); + if (ret) { + dev_err(scp->dev, "%s: IPI timeout!\n", __func__); + goto unlock_mutex; + } scp_memcpy_aligned(send_obj->share_buf, buf, len); |