From: Amelie Delaunay amelie.delaunay@st.com
[ Upstream commit db96bf976a4fc65439be0b4524c0d41427d98814 ]
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.... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/spi/spi-stm32.c | 27 ++++++++++++++++++++++++--- 1 file changed, 24 insertions(+), 3 deletions(-)
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 44ac6eb3298d4..e29818abbeaf4 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> @@ -1985,6 +1986,8 @@ static int stm32_spi_remove(struct platform_device *pdev)
pm_runtime_disable(&pdev->dev);
+ pinctrl_pm_select_sleep_state(&pdev->dev); + return 0; }
@@ -1996,13 +1999,18 @@ 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); } @@ -2032,10 +2040,23 @@ 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