misc: rtsx: Removed unused dev_aspm_mode

The struct rtsx_cr_option.dev_aspm_mode member is never set to anything
other than DEV_ASPM_DYNAMIC (0).  Remove it and code that tests it.  No
functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20200521180545.1159896-3-helgaas@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/cardreader/rts5249.c

@@ -349,25 +349,15 @@ static int rtsx_base_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 
 static void rts5249_set_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	struct rtsx_cr_option *option = &pcr->option;
 	u8 val = 0;
 
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
 	if (enable)
 		val = pcr->aspm_en;
-		rtsx_pci_update_cfg_byte(pcr,
-			pcr->pcie_cap + PCI_EXP_LNKCTL,
+	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
 				 ASPM_MASK_NEG, val);
-	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
-		u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
-
-		if (!enable)
-			val = FORCE_ASPM_CTL0;
-		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
-	}
 
 	pcr->aspm_enabled = enable;
 }
@@ -471,7 +461,6 @@ void rts5249_init_params(struct rtsx_pcr *pcr)
 	option->ltr_active_latency = LTR_ACTIVE_LATENCY_DEF;
 	option->ltr_idle_latency = LTR_IDLE_LATENCY_DEF;
 	option->ltr_l1off_latency = LTR_L1OFF_LATENCY_DEF;
-	option->dev_aspm_mode = DEV_ASPM_DYNAMIC;
 	option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
 	option->ltr_l1off_sspwrgate = LTR_L1OFF_SSPWRGATE_5249_DEF;
 	option->ltr_l1off_snooze_sspwrgate =

drivers/misc/cardreader/rts5260.c

@@ -572,24 +572,15 @@ static int rts5260_extra_init_hw(struct rtsx_pcr *pcr)
 
 static void rts5260_set_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	struct rtsx_cr_option *option = &pcr->option;
 	u8 val = 0;
 
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
 	if (enable)
 		val = pcr->aspm_en;
 	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
 				 ASPM_MASK_NEG, val);
-	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
-		u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
-
-		if (!enable)
-			val = FORCE_ASPM_CTL0;
-		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
-	}
 
 	pcr->aspm_enabled = enable;
 }
@@ -683,7 +674,6 @@ void rts5260_init_params(struct rtsx_pcr *pcr)
 	option->ltr_active_latency = LTR_ACTIVE_LATENCY_DEF;
 	option->ltr_idle_latency = LTR_IDLE_LATENCY_DEF;
 	option->ltr_l1off_latency = LTR_L1OFF_LATENCY_DEF;
-	option->dev_aspm_mode = DEV_ASPM_DYNAMIC;
 	option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
 	option->ltr_l1off_sspwrgate = LTR_L1OFF_SSPWRGATE_5250_DEF;
 	option->ltr_l1off_snooze_sspwrgate =

drivers/misc/cardreader/rts5261.c

@@ -518,51 +518,28 @@ static int rts5261_extra_init_hw(struct rtsx_pcr *pcr)
 
 static void rts5261_enable_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	struct rtsx_cr_option *option = &pcr->option;
 	u8 val = 0;
 
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
-		val = pcr->aspm_en;
-		rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-					 ASPM_MASK_NEG, val);
-	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
-		u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
-
-		val = FORCE_ASPM_CTL0;
-		val |= (pcr->aspm_en & 0x02);
-		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
 	val = pcr->aspm_en;
 	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
 				 ASPM_MASK_NEG, val);
-	}
 	pcr->aspm_enabled = enable;
 
 }
 
 static void rts5261_disable_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	struct rtsx_cr_option *option = &pcr->option;
 	u8 val = 0;
 
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
-		val = 0;
-		rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
-					 ASPM_MASK_NEG, val);
-	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
-		u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
-
 	val = 0;
 	rtsx_pci_update_cfg_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL,
 				 ASPM_MASK_NEG, val);
-		val = FORCE_ASPM_CTL0;
-		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
-	}
 	rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
 	udelay(10);
 	pcr->aspm_enabled = enable;
@@ -789,7 +766,6 @@ void rts5261_init_params(struct rtsx_pcr *pcr)
 	option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
 	option->ltr_l1off_sspwrgate = 0x7F;
 	option->ltr_l1off_snooze_sspwrgate = 0x78;
-	option->dev_aspm_mode = DEV_ASPM_DYNAMIC;
 
 	option->ocp_en = 1;
 	hw_param->interrupt_en |= SD_OC_INT_EN;

drivers/misc/cardreader/rtsx_pcr.c

@@ -90,24 +90,13 @@ int rtsx_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
 
 static void rtsx_comm_set_aspm(struct rtsx_pcr *pcr, bool enable)
 {
-	struct rtsx_cr_option *option = &pcr->option;
-
 	if (pcr->aspm_enabled == enable)
 		return;
 
-	if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
 	if (enable)
 		rtsx_pci_enable_aspm(pcr);
 	else
 		rtsx_pci_disable_aspm(pcr);
-	} else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
-		u8 mask = FORCE_ASPM_VAL_MASK;
-		u8 val = 0;
-
-		if (enable)
-			val = pcr->aspm_en;
-		rtsx_pci_write_register(pcr, ASPM_FORCE_CTL,  mask, val);
-	}
 
 	pcr->aspm_enabled = enable;
 }

include/linux/rtsx_pci.h

@@ -1104,13 +1104,6 @@ enum PDEV_STAT  {PDEV_STAT_IDLE, PDEV_STAT_RUN};
 #define L1_SNOOZE_TEST_EN		BIT(5)
 #define LTR_L1SS_PWR_GATE_CHECK_CARD_EN	BIT(6)
 
-enum dev_aspm_mode {
-	DEV_ASPM_DYNAMIC,
-	DEV_ASPM_BACKDOOR,
-	DEV_ASPM_STATIC,
-	DEV_ASPM_DISABLE,
-};
-
 /*
  * struct rtsx_cr_option  - card reader option
  * @dev_flags: device flags
@@ -1121,7 +1114,6 @@ enum dev_aspm_mode {
  * @ltr_active_latency: ltr mode active latency
  * @ltr_idle_latency: ltr mode idle latency
  * @ltr_l1off_latency: ltr mode l1off latency
- * @dev_aspm_mode: device aspm mode
  * @l1_snooze_delay: l1 snooze delay
  * @ltr_l1off_sspwrgate: ltr l1off sspwrgate
  * @ltr_l1off_snooze_sspwrgate: ltr l1off snooze sspwrgate
@@ -1138,7 +1130,6 @@ struct rtsx_cr_option {
 	u32 ltr_active_latency;
 	u32 ltr_idle_latency;
 	u32 ltr_l1off_latency;
-	enum dev_aspm_mode dev_aspm_mode;
 	u32 l1_snooze_delay;
 	u8 ltr_l1off_sspwrgate;
 	u8 ltr_l1off_snooze_sspwrgate;