diff options
| author | Amelie Delaunay <amelie.delaunay@st.com> | 2020-08-10 09:12:37 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-08-10 19:46:44 +0100 |
| commit | db96bf976a4fc65439be0b4524c0d41427d98814 (patch) | |
| tree | b3278dd8b44ffb6a8ef7407aa6f4b0e087136843 /drivers/spi | |
| parent | 9cc61973bf9385b19ff5dda4a2a7e265fcba85e4 (diff) | |
| download | linux-stable-db96bf976a4fc65439be0b4524c0d41427d98814.tar.gz linux-stable-db96bf976a4fc65439be0b4524c0d41427d98814.tar.bz2 linux-stable-db96bf976a4fc65439be0b4524c0d41427d98814.zip | |
spi: stm32: fixes suspend/resume management
This patch adds pinctrl power management, and reconfigure spi controller
in case of resume.
Fixes: 038ac869c9d2 ("spi: stm32: add runtime PM support")
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Link: https://lore.kernel.org/r/1597043558-29668-5-git-send-email-alain.volmat@st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-stm32.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 571dea72bf7e..9b90a22543fd 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -13,6 +13,7 @@ #include <linux/iopoll.h> #include <linux/module.h> #include <linux/of_platform.h> +#include <linux/pinctrl/consumer.h> #include <linux/pm_runtime.h> #include <linux/reset.h> #include <linux/spi/spi.h> @@ -2007,6 +2008,8 @@ static int stm32_spi_remove(struct platform_device *pdev) pm_runtime_disable(&pdev->dev); + pinctrl_pm_select_sleep_state(&pdev->dev); + return 0; } @@ -2018,13 +2021,18 @@ static int stm32_spi_runtime_suspend(struct device *dev) clk_disable_unprepare(spi->clk); - return 0; + return pinctrl_pm_select_sleep_state(dev); } static int stm32_spi_runtime_resume(struct device *dev) { struct spi_master *master = dev_get_drvdata(dev); struct stm32_spi *spi = spi_master_get_devdata(master); + int ret; + + ret = pinctrl_pm_select_default_state(dev); + if (ret) + return ret; return clk_prepare_enable(spi->clk); } @@ -2054,10 +2062,23 @@ static int stm32_spi_resume(struct device *dev) return ret; ret = spi_master_resume(master); - if (ret) + if (ret) { clk_disable_unprepare(spi->clk); + return ret; + } - return ret; + ret = pm_runtime_get_sync(dev); + if (ret) { + dev_err(dev, "Unable to power device:%d\n", ret); + return ret; + } + + spi->cfg->config(spi); + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return 0; } #endif |