drivers: reset: stih416: add softreset controller

This patch adds softreset controller for STiH416 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,stih416-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>

diff --git a/drivers/reset/sti/reset-stih416.c b/drivers/reset/sti/reset-stih416.c
index 0becfc5..fe3bf02 100644 (file)
--- a/drivers/reset/sti/reset-stih416.c
+++ b/drivers/reset/sti/reset-stih416.c
@@ -24,6 +24,7 @@ static const char stih416_front[] = "st,stih416-front-syscfg";
 static const char stih416_rear[] = "st,stih416-rear-syscfg";
 static const char stih416_sbc[] = "st,stih416-sbc-syscfg";
 static const char stih416_lpm[] = "st,stih416-lpm-syscfg";
+static const char stih416_cpu[] = "st,stih416-cpu-syscfg";
 
 #define STIH416_PDN_FRONT(_bit) \
        _SYSCFG_RST_CH(stih416_front, SYSCFG_1500, _bit, SYSSTAT_1578, _bit)
@@ -37,6 +38,29 @@ static const char stih416_lpm[] = "st,stih416-lpm-syscfg";
 #define SYSCFG_2525    0x834 /* Powerdown request USB/SATA/PCIe */
 #define SYSSTAT_2583   0x91c /* Powerdown status USB/SATA/PCIe */
 
+#define SYSCFG_2552    0x8A0 /* Reset Generator control 0 */
+#define SYSCFG_1539    0x86c /* Softreset Ethernet 0 */
+#define SYSCFG_510     0x7f8 /* Softreset Ethernet 1 */
+#define LPM_SYSCFG_1   0x4 /* Softreset IRB */
+#define SYSCFG_2553    0x8a4 /* Softreset SATA0/1, PCIE0/1 */
+#define SYSCFG_7563    0x8cc /* MPE softresets 0 */
+#define SYSCFG_7564    0x8d0 /* MPE softresets 1 */
+
+#define STIH416_SRST_CPU(_reg, _bit) \
+        _SYSCFG_RST_CH_NO_ACK(stih416_cpu, _reg, _bit)
+
+#define STIH416_SRST_FRONT(_reg, _bit) \
+        _SYSCFG_RST_CH_NO_ACK(stih416_front, _reg, _bit)
+
+#define STIH416_SRST_REAR(_reg, _bit) \
+        _SYSCFG_RST_CH_NO_ACK(stih416_rear, _reg, _bit)
+
+#define STIH416_SRST_LPM(_reg, _bit) \
+        _SYSCFG_RST_CH_NO_ACK(stih416_lpm, _reg, _bit)
+
+#define STIH416_SRST_SBC(_reg, _bit) \
+        _SYSCFG_RST_CH_NO_ACK(stih416_sbc, _reg, _bit)
+
 static const struct syscfg_reset_channel_data stih416_powerdowns[] = {
        [STIH416_EMISS_POWERDOWN]       = STIH416_PDN_FRONT(0),
        [STIH416_NAND_POWERDOWN]        = STIH416_PDN_FRONT(1),
@@ -51,15 +75,55 @@ static const struct syscfg_reset_channel_data stih416_powerdowns[] = {
        [STIH416_PCIE1_POWERDOWN]       = STIH416_PDN_REAR(5, 8),
 };
 
+static const struct syscfg_reset_channel_data stih416_softresets[] = {
+       [STIH416_ETH0_SOFTRESET] = STIH416_SRST_FRONT(SYSCFG_1539, 0),
+       [STIH416_ETH1_SOFTRESET] = STIH416_SRST_SBC(SYSCFG_510, 0),
+       [STIH416_IRB_SOFTRESET]  = STIH416_SRST_LPM(LPM_SYSCFG_1, 6),
+       [STIH416_USB0_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 9),
+       [STIH416_USB1_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 10),
+       [STIH416_USB2_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 11),
+       [STIH416_USB3_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 28),
+       [STIH416_SATA0_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 7),
+       [STIH416_SATA1_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 3),
+       [STIH416_PCIE0_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 15),
+       [STIH416_PCIE1_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 2),
+       [STIH416_AUD_DAC_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 14),
+       [STIH416_HDTVOUT_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 5),
+       [STIH416_VTAC_M_RX_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 25),
+       [STIH416_VTAC_A_RX_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2552, 26),
+       [STIH416_SYNC_HD_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 5),
+       [STIH416_SYNC_SD_SOFTRESET] = STIH416_SRST_REAR(SYSCFG_2553, 6),
+       [STIH416_BLITTER_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 10),
+       [STIH416_GPU_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 11),
+       [STIH416_VTAC_M_TX_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 18),
+       [STIH416_VTAC_A_TX_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 19),
+       [STIH416_VTG_AUX_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 21),
+       [STIH416_JPEG_DEC_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7563, 23),
+       [STIH416_HVA_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 2),
+       [STIH416_COMPO_M_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 3),
+       [STIH416_COMPO_A_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 4),
+       [STIH416_VP8_DEC_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 10),
+       [STIH416_VTG_MAIN_SOFTRESET] = STIH416_SRST_CPU(SYSCFG_7564, 16),
+};
+
 static struct syscfg_reset_controller_data stih416_powerdown_controller = {
        .wait_for_ack   = true,
        .nr_channels    = ARRAY_SIZE(stih416_powerdowns),
        .channels       = stih416_powerdowns,
 };
 
+static struct syscfg_reset_controller_data stih416_softreset_controller = {
+       .wait_for_ack = false,
+       .active_low = true,
+       .nr_channels = ARRAY_SIZE(stih416_softresets),
+       .channels = stih416_softresets,
+};
+
 static struct of_device_id stih416_reset_match[] = {
        { .compatible = "st,stih416-powerdown",
          .data = &stih416_powerdown_controller, },
+       { .compatible = "st,stih416-softreset",
+         .data = &stih416_softreset_controller, },
        {},
 };