ARM: OMAP3: hwmod data: add HDQ/1-wire hwmod

Add the HDQ1W hwmod for OMAP34xx, OMAP36xx, and AM3505/3517 devices.
According to the respective TRMs, it doesn't appear to be available for the
816x/814x or the AM335x.

The OCPIF_SWSUP_IDLE flag is added to work around an apparent hardware
bug: the hardware is not taking the CM_FCLKEN*_CORE.EN_HDQ bit into
account when considering whether to go idle:

    http://www.spinics.net/lists/linux-omap/msg63576.html

This causes HDQ transfers to fail or become corrupt.  Thanks to
NeilBrown for his help diagnosing and testing fixes for this problem.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: NeilBrown <neilb@suse.de>
Tested-by: NeilBrown <neilb@suse.de>

diff --git a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
index 0c65079..97c6597 100644 (file)
--- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
@@ -1980,6 +1980,22 @@ static struct omap_hwmod omap3xxx_usb_tll_hs_hwmod = {
        },
 };
 
+static struct omap_hwmod omap3xxx_hdq1w_hwmod = {
+       .name           = "hdq1w",
+       .mpu_irqs       = omap2_hdq1w_mpu_irqs,
+       .main_clk       = "hdq_fck",
+       .prcm           = {
+               .omap2 = {
+                       .module_offs = CORE_MOD,
+                       .prcm_reg_id = 1,
+                       .module_bit = OMAP3430_EN_HDQ_SHIFT,
+                       .idlest_reg_id = 1,
+                       .idlest_idle_bit = OMAP3430_ST_HDQ_SHIFT,
+               },
+       },
+       .class          = &omap2_hdq1w_class,
+};
+
 /*
  * interfaces
  */
@@ -3059,6 +3075,16 @@ static struct omap_hwmod_ocp_if omap3xxx_l4_core__usb_tll_hs = {
        .user           = OCP_USER_MPU | OCP_USER_SDMA,
 };
 
+/* l4_core -> hdq1w interface */
+static struct omap_hwmod_ocp_if omap3xxx_l4_core__hdq1w = {
+       .master         = &omap3xxx_l4_core_hwmod,
+       .slave          = &omap3xxx_hdq1w_hwmod,
+       .clk            = "hdq_ick",
+       .addr           = omap2_hdq1w_addr_space,
+       .user           = OCP_USER_MPU | OCP_USER_SDMA,
+       .flags          = OMAP_FIREWALL_L4 | OCPIF_SWSUP_IDLE,
+};
+
 static struct omap_hwmod_ocp_if *omap3xxx_hwmod_ocp_ifs[] __initdata = {
        &omap3xxx_l3_main__l4_core,
        &omap3xxx_l3_main__l4_per,
@@ -3151,6 +3177,7 @@ static struct omap_hwmod_ocp_if *omap34xx_hwmod_ocp_ifs[] __initdata = {
        &omap34xx_l4_core__sr1,
        &omap34xx_l4_core__sr2,
        &omap3xxx_l4_core__mailbox,
+       &omap3xxx_l4_core__hdq1w,
        NULL
 };
 
@@ -3170,6 +3197,7 @@ static struct omap_hwmod_ocp_if *omap36xx_hwmod_ocp_ifs[] __initdata = {
        &omap3xxx_l4_core__usb_tll_hs,
        &omap3xxx_l4_core__es3plus_mmc1,
        &omap3xxx_l4_core__es3plus_mmc2,
+       &omap3xxx_l4_core__hdq1w,
        NULL
 };