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authorSrinivas Kandagatla <srinivas.kandagatla@st.com>2013-11-12 14:22:56 +0400
committerSrinivas Kandagatla <srinivas.kandagatla@st.com>2014-03-11 14:51:58 +0400
commita596ebd3f705ff5348b9f7a7be280568ab45832d (patch)
tree7e05de5e5508f1f6862a367ddaaed3225ecd4574 /drivers/reset
parentd0ace0f6e5bfa1b064789cf343e42a3c808f031a (diff)
downloadlinux-a596ebd3f705ff5348b9f7a7be280568ab45832d.tar.xz
drivers: reset: stih415: add softreset controller
This patch adds softreset controller for STiH415 SOC, soft reset controller is based on system configuration registers which are mapped via regmap. This reset controller does not have any feedback or acknowledgement. With this patch a new device "st,stih415-softreset" is registered with system configuration registers based reset controller that controls the softreset state of the hardware such as Ethernet, IRB. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/reset')
-rw-r--r--drivers/reset/sti/reset-stih415.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/reset/sti/reset-stih415.c b/drivers/reset/sti/reset-stih415.c
index 56c214644dd9..e6f6c41abe12 100644
--- a/drivers/reset/sti/reset-stih415.c
+++ b/drivers/reset/sti/reset-stih415.c
@@ -31,12 +31,29 @@ static const char stih415_lpm[] = "st,stih415-lpm-syscfg";
#define STIH415_PDN_REAR(_cntl, _stat) \
_SYSCFG_RST_CH(stih415_rear, SYSCFG_336, _cntl, SYSSTAT_384, _stat)
+#define STIH415_SRST_REAR(_reg, _bit) \
+ _SYSCFG_RST_CH_NO_ACK(stih415_rear, _reg, _bit)
+
+#define STIH415_SRST_SBC(_reg, _bit) \
+ _SYSCFG_RST_CH_NO_ACK(stih415_sbc, _reg, _bit)
+
+#define STIH415_SRST_FRONT(_reg, _bit) \
+ _SYSCFG_RST_CH_NO_ACK(stih415_front, _reg, _bit)
+
+#define STIH415_SRST_LPM(_reg, _bit) \
+ _SYSCFG_RST_CH_NO_ACK(stih415_lpm, _reg, _bit)
+
#define SYSCFG_114 0x38 /* Powerdown request EMI/NAND/Keyscan */
#define SYSSTAT_187 0x15c /* Powerdown status EMI/NAND/Keyscan */
#define SYSCFG_336 0x90 /* Powerdown request USB/SATA/PCIe */
#define SYSSTAT_384 0x150 /* Powerdown status USB/SATA/PCIe */
+#define SYSCFG_376 0x130 /* Reset generator 0 control 0 */
+#define SYSCFG_166 0x108 /* Softreset Ethernet 0 */
+#define SYSCFG_31 0x7c /* Softreset Ethernet 1 */
+#define LPM_SYSCFG_1 0x4 /* Softreset IRB */
+
static const struct syscfg_reset_channel_data stih415_powerdowns[] = {
[STIH415_EMISS_POWERDOWN] = STIH415_PDN_FRONT(0),
[STIH415_NAND_POWERDOWN] = STIH415_PDN_FRONT(1),
@@ -49,15 +66,33 @@ static const struct syscfg_reset_channel_data stih415_powerdowns[] = {
[STIH415_PCIE_POWERDOWN] = STIH415_PDN_REAR(5, 8),
};
+static const struct syscfg_reset_channel_data stih415_softresets[] = {
+ [STIH415_ETH0_SOFTRESET] = STIH415_SRST_FRONT(SYSCFG_166, 0),
+ [STIH415_ETH1_SOFTRESET] = STIH415_SRST_SBC(SYSCFG_31, 0),
+ [STIH415_IRB_SOFTRESET] = STIH415_SRST_LPM(LPM_SYSCFG_1, 6),
+ [STIH415_USB0_SOFTRESET] = STIH415_SRST_REAR(SYSCFG_376, 9),
+ [STIH415_USB1_SOFTRESET] = STIH415_SRST_REAR(SYSCFG_376, 10),
+ [STIH415_USB2_SOFTRESET] = STIH415_SRST_REAR(SYSCFG_376, 11),
+};
+
static struct syscfg_reset_controller_data stih415_powerdown_controller = {
.wait_for_ack = true,
.nr_channels = ARRAY_SIZE(stih415_powerdowns),
.channels = stih415_powerdowns,
};
+static struct syscfg_reset_controller_data stih415_softreset_controller = {
+ .wait_for_ack = false,
+ .active_low = true,
+ .nr_channels = ARRAY_SIZE(stih415_softresets),
+ .channels = stih415_softresets,
+};
+
static struct of_device_id stih415_reset_match[] = {
{ .compatible = "st,stih415-powerdown",
.data = &stih415_powerdown_controller, },
+ { .compatible = "st,stih415-softreset",
+ .data = &stih415_softreset_controller, },
{},
};