mmc: tmio: Restructure ->set_ios() and adapt ->probe() to it

An internal power state machine were beeing used to keep ->probe() and
->set_ios() in sync. Especially for handling specific scenarios while
using CONFIG_MMC_CLKGATE. Moreover dependency to CONFIG_MMC_CLKGATE
existed to handle runtime PM properly, which we moves away from here.

By removing the state machine and instead make ->set_ios() rely on the
information provided through the function's in-parameters, the code
becomes significantly simplier.

Additonally as a part of this rework we prepares for making the runtime
PM callbacks responsible of clock gating.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>

1 files changed, 0 insertions, 20 deletions

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index d6ceb1a5e56f..f837723c30b9 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -40,22 +40,6 @@
 
 struct tmio_mmc_data;
 
-/*
- * We differentiate between the following 3 power states:
- * 1. card slot powered off, controller stopped. This is used, when either there
- *    is no card in the slot, or the card really has to be powered down.
- * 2. card slot powered on, controller stopped. This is used, when a card is in
- *    the slot, but no activity is currently taking place. This is a power-
- *    saving mode with card-state preserved. This state can be entered, e.g.
- *    when MMC clock-gating is used.
- * 3. card slot powered on, controller running. This is the actual active state.
- */
-enum tmio_mmc_power {
-	TMIO_MMC_OFF_STOP,	/* card power off, controller stopped */
-	TMIO_MMC_ON_STOP,	/* card power on, controller stopped */
-	TMIO_MMC_ON_RUN,	/* card power on, controller running */
-};
-
 struct tmio_mmc_host {
 	void __iomem *ctl;
 	struct mmc_command      *cmd;
@@ -63,9 +47,6 @@ struct tmio_mmc_host {
 	struct mmc_data         *data;
 	struct mmc_host         *mmc;
 
-	/* Controller and card power state */
-	enum tmio_mmc_power	power;
-
 	/* Callbacks for clock / power control */
 	void (*set_pwr)(struct platform_device *host, int state);
 	void (*set_clk_div)(struct platform_device *host, int state);
@@ -100,7 +81,6 @@ struct tmio_mmc_host {
 	unsigned long		last_req_ts;
 	struct mutex		ios_lock;	/* protect set_ios() context */
 	bool			native_hotplug;
-	bool			resuming;
 	bool			sdio_irq_enabled;
 };