diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/816-sdhc-0001-mmc-sdhci-of-esdhc-poll-ESDHC_FLUSH_ASYNC_FIFO-bit-u.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/816-sdhc-0001-mmc-sdhci-of-esdhc-poll-ESDHC_FLUSH_ASYNC_FIFO-bit-u.patch | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/target/linux/layerscape/patches-5.4/816-sdhc-0001-mmc-sdhci-of-esdhc-poll-ESDHC_FLUSH_ASYNC_FIFO-bit-u.patch b/target/linux/layerscape/patches-5.4/816-sdhc-0001-mmc-sdhci-of-esdhc-poll-ESDHC_FLUSH_ASYNC_FIFO-bit-u.patch deleted file mode 100644 index 085de51c14..0000000000 --- a/target/linux/layerscape/patches-5.4/816-sdhc-0001-mmc-sdhci-of-esdhc-poll-ESDHC_FLUSH_ASYNC_FIFO-bit-u.patch +++ /dev/null @@ -1,72 +0,0 @@ -From 0f5cf5dcc3ca4f8e610ebe1e62e3d3546b9d09ca Mon Sep 17 00:00:00 2001 -From: Yangbo Lu <yangbo.lu@nxp.com> -Date: Mon, 16 Sep 2019 19:17:44 +0800 -Subject: [PATCH] mmc: sdhci-of-esdhc: poll ESDHC_FLUSH_ASYNC_FIFO bit until - completion - -The ESDHC_FLUSH_ASYNC_FIFO bit which is set to flush asynchronous FIFO -should be polled until it's auto cleared by hardware. - -Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> ---- - drivers/mmc/host/sdhci-of-esdhc.c | 35 ++++++++++++++++++++++++++++------- - 1 file changed, 28 insertions(+), 7 deletions(-) - ---- a/drivers/mmc/host/sdhci-of-esdhc.c -+++ b/drivers/mmc/host/sdhci-of-esdhc.c -@@ -592,6 +592,32 @@ static void esdhc_clock_enable(struct sd - } - } - -+static void esdhc_flush_async_fifo(struct sdhci_host *host) -+{ -+ ktime_t timeout; -+ u32 val; -+ -+ val = sdhci_readl(host, ESDHC_DMA_SYSCTL); -+ val |= ESDHC_FLUSH_ASYNC_FIFO; -+ sdhci_writel(host, val, ESDHC_DMA_SYSCTL); -+ -+ /* Wait max 20 ms */ -+ timeout = ktime_add_ms(ktime_get(), 20); -+ while (1) { -+ bool timedout = ktime_after(ktime_get(), timeout); -+ -+ if (!(sdhci_readl(host, ESDHC_DMA_SYSCTL) & -+ ESDHC_FLUSH_ASYNC_FIFO)) -+ break; -+ if (timedout) { -+ pr_err("%s: flushing asynchronous FIFO timeout.\n", -+ mmc_hostname(host->mmc)); -+ break; -+ } -+ usleep_range(10, 20); -+ } -+} -+ - static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock) - { - struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); -@@ -684,9 +710,7 @@ static void esdhc_of_set_clock(struct sd - sdhci_writel(host, temp | ESDHC_HS400_WNDW_ADJUST, ESDHC_TBCTL); - - esdhc_clock_enable(host, false); -- temp = sdhci_readl(host, ESDHC_DMA_SYSCTL); -- temp |= ESDHC_FLUSH_ASYNC_FIFO; -- sdhci_writel(host, temp, ESDHC_DMA_SYSCTL); -+ esdhc_flush_async_fifo(host); - } - - /* Wait max 20 ms */ -@@ -888,10 +912,7 @@ static void esdhc_tuning_block_enable(st - u32 val; - - esdhc_clock_enable(host, false); -- -- val = sdhci_readl(host, ESDHC_DMA_SYSCTL); -- val |= ESDHC_FLUSH_ASYNC_FIFO; -- sdhci_writel(host, val, ESDHC_DMA_SYSCTL); -+ esdhc_flush_async_fifo(host); - - val = sdhci_readl(host, ESDHC_TBCTL); - if (enable) |