[PATCH-V2 6/6] memory: bcm2835: expose register ranges via debugfs
kernel at martin.sperl.org
kernel at martin.sperl.org
Wed May 18 08:40:30 PDT 2016
From: Martin Sperl <kernel at martin.sperl.org>
Expose the assigned register ranges via debugfs.
For some reason these register ranges are reading as 0
when running with the binary firmware - this may be a limitation
introduced by the firmware or it may be something that
the SOC is blocking.
This is there just to allow/document those registers,
that are visible on the VC4/GPU side.
Signed-off-by: Martin Sperl <kernel at martin.sperl.org>
---
drivers/memory/bcm2835-sdram.c | 336 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 336 insertions(+)
diff --git a/drivers/memory/bcm2835-sdram.c b/drivers/memory/bcm2835-sdram.c
index ce985ee..9d8cce2 100644
--- a/drivers/memory/bcm2835-sdram.c
+++ b/drivers/memory/bcm2835-sdram.c
@@ -17,6 +17,7 @@
*/
#include <linux/clk.h>
+#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/io.h>
@@ -26,6 +27,140 @@
#include <linux/of_address.h>
#include <linux/platform_device.h>
+/* the set of registers of the sdram controller */
+#define BCM2835_SD_CS 0x000
+#define BCM2835_SD_SA 0x004
+#define BCM2835_SD_SB 0x008
+#define BCM2835_SD_SC 0x00c
+#define BCM2835_SD_PT2 0x010
+#define BCM2835_SD_PT1 0x014
+#define BCM2835_SD_SECSRT0 0x03c
+#define BCM2835_SD_SECEND0 0x040
+#define BCM2835_SD_SECSRT1 0x044
+#define BCM2835_SD_SECEND1 0x048
+#define BCM2835_SD_SECSRT2 0x04c
+#define BCM2835_SD_SECEND2 0x050
+#define BCM2835_SD_SECSRT3 0x054
+#define BCM2835_SD_SECEND3 0x058
+#define BCM2835_SD_PHYC 0x060
+#define BCM2835_SD_MRT 0x064
+#define BCM2835_SD_TMC 0x07c
+#define BCM2835_SD_RWC 0x080
+#define BCM2835_SD_VIN 0x088
+#define BCM2835_SD_MR 0x090
+#define BCM2835_SD_SD 0x094
+#define BCM2835_SD_SE 0x098
+#define BCM2835_SD_STALL 0x0a0
+#define BCM2835_SD_SF 0x0b4
+#define BCM2835_SD_CARCRC 0x100
+#define BCM2835_SD_DMRCRC0 0x104
+#define BCM2835_SD_DMRCRC1 0x108
+#define BCM2835_SD_DQRCRC0 0x10c
+#define BCM2835_SD_DQRCRC1 0x110
+#define BCM2835_SD_DQRCRC2 0x114
+#define BCM2835_SD_DQRCRC3 0x118
+#define BCM2835_SD_DQRCRC4 0x11c
+#define BCM2835_SD_DQRCRC5 0x120
+#define BCM2835_SD_DQRCRC6 0x124
+#define BCM2835_SD_DQRCRC7 0x128
+#define BCM2835_SD_DQRCRC8 0x12c
+#define BCM2835_SD_DQRCRC9 0x130
+#define BCM2835_SD_DQRCRC10 0x134
+#define BCM2835_SD_DQRCRC11 0x138
+#define BCM2835_SD_DQRCRC12 0x13c
+#define BCM2835_SD_DQRCRC13 0x140
+#define BCM2835_SD_DQRCRC14 0x144
+#define BCM2835_SD_DQRCRC15 0x148
+#define BCM2835_SD_DQLCRC0 0x14c
+#define BCM2835_SD_DQLCRC1 0x150
+#define BCM2835_SD_DQLCRC2 0x154
+#define BCM2835_SD_DQLCRC3 0x158
+#define BCM2835_SD_DQLCRC4 0x15c
+#define BCM2835_SD_DQLCRC5 0x160
+#define BCM2835_SD_DQLCRC6 0x164
+#define BCM2835_SD_DQLCRC7 0x168
+#define BCM2835_SD_DQLCRC8 0x16c
+#define BCM2835_SD_DQLCRC9 0x170
+#define BCM2835_SD_DQLCRC10 0x174
+#define BCM2835_SD_DQLCRC11 0x178
+#define BCM2835_SD_DQLCRC12 0x17c
+#define BCM2835_SD_DQLCRC13 0x180
+#define BCM2835_SD_DQLCRC14 0x184
+#define BCM2835_SD_DQLCRC15 0x188
+
+/* the set of registers of the APHY_CSR, which also contains the pll */
+#define APHY_CSR_ADDR_REV_ID 0x000
+#define APHY_CSR_GLBL_ADDR_DLL_RESET 0x004
+#define APHY_CSR_GLBL_ADDR_DLL_RECAL 0x008
+#define APHY_CSR_GLBL_ADDR_DLL_CNTRL 0x00c
+#define APHY_CSR_GLBL_ADDR_DLL_PH_LD_VAL 0x010
+#define APHY_CSR_ADDR_MASTER_DLL_OUTPUT 0x014
+#define APHY_CSR_ADDR_SLAVE_DLL_OFFSET 0x018
+#define APHY_CSR_GLBL_ADR_MSTR_DLL_BYPEN 0x01c
+#define APHY_CSR_GLBL_ADR_DLL_LOCK_STAT 0x020
+#define APHY_CSR_DDR_PLL_GLOBAL_RESET 0x024
+#define APHY_CSR_DDR_PLL_POST_DIV_RESET 0x028
+#define APHY_CSR_DDR_PLL_VCO_FREQ_CNTRL0 0x02c
+#define APHY_CSR_DDR_PLL_VCO_FREQ_CNTRL1 0x030
+#define APHY_CSR_DDR_PLL_MDIV_VALUE 0x034
+#define APHY_CSR_DDR_PLL_CONFIG_CNTRL 0x038
+#define APHY_CSR_DDR_PLL_MISC_CNTRL 0x03c
+#define APHY_CSR_DDR_PLL_SPRDSPECT_CTRL0 0x040
+#define APHY_CSR_DDR_PLL_SPRDSPECT_CTRL1 0x044
+#define APHY_CSR_DDR_PLL_LOCK_STATUS 0x048
+#define APHY_CSR_DDR_PLL_HOLD_CH 0x04c
+#define APHY_CSR_DDR_PLL_ENABLE_CH 0x050
+#define APHY_CSR_DDR_PLL_BYPASS 0x054
+#define APHY_CSR_DDR_PLL_PWRDWN 0x058
+#define APHY_CSR_DDR_PLL_CH0_DESKEW_CTRL 0x05c
+#define APHY_CSR_DDR_PLL_CH1_DESKEW_CTRL 0x060
+#define APHY_CSR_DDR_PLL_DESKEW_STATUS 0x064
+#define APHY_CSR_ADDR_PAD_DRV_SLEW_CTRL 0x068
+#define APHY_CSR_ADDR_PAD_MISC_CTRL 0x06c
+#define APHY_CSR_ADDR_PVT_COMP_CTRL 0x070
+#define APHY_CSR_ADDR_PVT_COMP_OVRD_CTRL 0x074
+#define APHY_CSR_ADDR_PVT_COMP_STATUS 0x078
+#define APHY_CSR_ADDR_PVT_COMP_DEBUG 0x07c
+#define APHY_CSR_PHY_BIST_CNTRL_SPR 0x080
+#define APHY_CSR_PHY_BIST_CA_CRC_SPR 0x084
+#define APHY_CSR_ADDR_SPR0_RW 0x088
+#define APHY_CSR_ADDR_SPR1_RO 0x08c
+#define APHY_CSR_ADDR_SPR_RO 0x090
+
+/* the set of registers of the DPHY_CSR */
+#define DPHY_CSR_DQ_REV_ID 0x000
+#define DPHY_CSR_GLBL_DQ_DLL_RESET 0x004
+#define DPHY_CSR_GLBL_DQ_DLL_RECALIBRATE 0x008
+#define DPHY_CSR_GLBL_DQ_DLL_CNTRL 0x00c
+#define DPHY_CSR_GLBL_DQ_DLL_PHASE_LD_VL 0x010
+#define DPHY_CSR_GLBL_DQ_MSTR_DLL_BYP_EN 0x014
+#define DPHY_CSR_GLBL_MSTR_DLL_LOCK_STAT 0x018
+#define DPHY_CSR_BYTE0_SLAVE_DLL_OFFSET 0x01c
+#define DPHY_CSR_BYTE1_SLAVE_DLL_OFFSET 0x020
+#define DPHY_CSR_BYTE2_SLAVE_DLL_OFFSET 0x024
+#define DPHY_CSR_BYTE3_SLAVE_DLL_OFFSET 0x028
+#define DPHY_CSR_BYTE0_MASTER_DLL_OUTPUT 0x02c
+#define DPHY_CSR_BYTE1_MASTER_DLL_OUTPUT 0x030
+#define DPHY_CSR_BYTE2_MASTER_DLL_OUTPUT 0x034
+#define DPHY_CSR_BYTE3_MASTER_DLL_OUTPUT 0x038
+#define DPHY_CSR_NORM_READ_DQS_GATE_CTRL 0x03c
+#define DPHY_CSR_BOOT_READ_DQS_GATE_CTRL 0x040
+#define DPHY_CSR_PHY_FIFO_PNTRS 0x044
+#define DPHY_CSR_DQ_PHY_MISC_CTRL 0x048
+#define DPHY_CSR_DQ_PAD_DRV_SLEW_CTRL 0x04c
+#define DPHY_CSR_DQ_PAD_MISC_CTRL 0x050
+#define DPHY_CSR_DQ_PVT_COMP_CTRL 0x054
+#define DPHY_CSR_DQ_PVT_COMP_OVERRD_CTRL 0x058
+#define DPHY_CSR_DQ_PVT_COMP_STATUS 0x05c
+#define DPHY_CSR_DQ_PVT_COMP_DEBUG 0x060
+#define DPHY_CSR_DQ_PHY_READ_CTRL 0x064
+#define DPHY_CSR_DQ_PHY_READ_STATUS 0x068
+#define DPHY_CSR_DQ_SPR_RW 0x06c
+#define DPHY_CSR_DQ_SPR1_RO 0x070
+#define DPHY_CSR_DQ_SPR_RO 0x074
+#define DPHY_CSR_CRC_CTRL 0x800
+#define DPHY_CSR_CRC_DATA 0x804
+
struct bcm2835_sdram_data {
void __iomem *sdram_regs;
void __iomem *aphy_csr_regs;
@@ -33,8 +168,196 @@ struct bcm2835_sdram_data {
struct clk *clk_lv;
struct clk *clk_pll_parent;
+
+ struct dentry *debugfsdir;
+};
+
+#define R(n, o) { .name = n, .offset = o }
+static const struct debugfs_reg32 bcm2835_sdram_regs[] = {
+ R("cs", BCM2835_SD_CS),
+ R("sa", BCM2835_SD_SA),
+ R("sb", BCM2835_SD_SB),
+ R("sc", BCM2835_SD_SC),
+ R("pt2", BCM2835_SD_PT2),
+ R("pt1", BCM2835_SD_PT1),
+ R("secsrt0", BCM2835_SD_SECSRT0),
+ R("secend0", BCM2835_SD_SECEND0),
+ R("secsrt1", BCM2835_SD_SECSRT1),
+ R("secend1", BCM2835_SD_SECEND1),
+ R("secsrt2", BCM2835_SD_SECSRT2),
+ R("secend2", BCM2835_SD_SECEND2),
+ R("secsrt3", BCM2835_SD_SECSRT3),
+ R("secend3", BCM2835_SD_SECEND3),
+ R("phyc", BCM2835_SD_PHYC),
+ R("mrt", BCM2835_SD_MRT),
+ R("tmc", BCM2835_SD_TMC),
+ R("rwc", BCM2835_SD_RWC),
+ R("vin", BCM2835_SD_VIN),
+ /*
+ * this is not exposed as this may result in races with
+ * a parallel read - possibly by the firmware:
+ * R("mr", BCM2835_SD_MR),
+ */
+ R("sd", BCM2835_SD_SD),
+ R("se", BCM2835_SD_SE),
+ R("stall", BCM2835_SD_STALL),
+ R("sf", BCM2835_SD_SF),
+ R("carcrc", BCM2835_SD_CARCRC),
+ R("dmrcrc0", BCM2835_SD_DMRCRC0),
+ R("dmrcrc1", BCM2835_SD_DMRCRC1),
+ R("dqrcrc0", BCM2835_SD_DQRCRC0),
+ R("dqrcrc1", BCM2835_SD_DQRCRC1),
+ R("dqrcrc2", BCM2835_SD_DQRCRC2),
+ R("dqrcrc3", BCM2835_SD_DQRCRC3),
+ R("dqrcrc4", BCM2835_SD_DQRCRC4),
+ R("dqrcrc5", BCM2835_SD_DQRCRC5),
+ R("dqrcrc6", BCM2835_SD_DQRCRC6),
+ R("dqrcrc7", BCM2835_SD_DQRCRC7),
+ R("dqrcrc8", BCM2835_SD_DQRCRC8),
+ R("dqrcrc9", BCM2835_SD_DQRCRC9),
+ R("dqrcrc10", BCM2835_SD_DQRCRC10),
+ R("dqrcrc11", BCM2835_SD_DQRCRC11),
+ R("dqrcrc12", BCM2835_SD_DQRCRC12),
+ R("dqrcrc13", BCM2835_SD_DQRCRC13),
+ R("dqrcrc14", BCM2835_SD_DQRCRC14),
+ R("dqrcrc15", BCM2835_SD_DQRCRC15),
+ R("dqlcrc0", BCM2835_SD_DQLCRC0),
+ R("dqlcrc1", BCM2835_SD_DQLCRC1),
+ R("dqlcrc2", BCM2835_SD_DQLCRC2),
+ R("dqlcrc3", BCM2835_SD_DQLCRC3),
+ R("dqlcrc4", BCM2835_SD_DQLCRC4),
+ R("dqlcrc5", BCM2835_SD_DQLCRC5),
+ R("dqlcrc6", BCM2835_SD_DQLCRC6),
+ R("dqlcrc7", BCM2835_SD_DQLCRC7),
+ R("dqlcrc8", BCM2835_SD_DQLCRC8),
+ R("dqlcrc9", BCM2835_SD_DQLCRC9),
+ R("dqlcrc10", BCM2835_SD_DQLCRC10),
+ R("dqlcrc11", BCM2835_SD_DQLCRC11),
+ R("dqlcrc12", BCM2835_SD_DQLCRC12),
+ R("dqlcrc13", BCM2835_SD_DQLCRC13),
+ R("dqlcrc14", BCM2835_SD_DQLCRC14),
+ R("dqlcrc15", BCM2835_SD_DQLCRC15)
+};
+
+static const struct debugfs_reg32 bcm2835_aphy_csr_regs[] = {
+ R("addr_rev_id", APHY_CSR_ADDR_REV_ID),
+ R("glbl_addr_dll_reset", APHY_CSR_GLBL_ADDR_DLL_RESET),
+ R("glbl_addr_dll_recal", APHY_CSR_GLBL_ADDR_DLL_RECAL),
+ R("glbl_addr_dll_cntrl", APHY_CSR_GLBL_ADDR_DLL_CNTRL),
+ R("glbl_addr_dll_ph_ld_val", APHY_CSR_GLBL_ADDR_DLL_PH_LD_VAL),
+ R("addr_master_dll_output", APHY_CSR_ADDR_MASTER_DLL_OUTPUT),
+ R("addr_slave_dll_offset", APHY_CSR_ADDR_SLAVE_DLL_OFFSET),
+ R("glbl_adr_mstr_dll_bypen", APHY_CSR_GLBL_ADR_MSTR_DLL_BYPEN),
+ R("glbl_adr_dll_lock_stat", APHY_CSR_GLBL_ADR_DLL_LOCK_STAT),
+ R("ddr_pll_global_reset", APHY_CSR_DDR_PLL_GLOBAL_RESET),
+ R("ddr_pll_post_div_reset", APHY_CSR_DDR_PLL_POST_DIV_RESET),
+ R("ddr_pll_vco_freq_cntrl0", APHY_CSR_DDR_PLL_VCO_FREQ_CNTRL0),
+ R("ddr_pll_vco_freq_cntrl1", APHY_CSR_DDR_PLL_VCO_FREQ_CNTRL1),
+ R("ddr_pll_mdiv_value", APHY_CSR_DDR_PLL_MDIV_VALUE),
+ R("ddr_pll_config_cntrl", APHY_CSR_DDR_PLL_CONFIG_CNTRL),
+ R("ddr_pll_misc_cntrl", APHY_CSR_DDR_PLL_MISC_CNTRL),
+ R("ddr_pll_sprdspect_ctrl0", APHY_CSR_DDR_PLL_SPRDSPECT_CTRL0),
+ R("ddr_pll_sprdspect_ctrl1", APHY_CSR_DDR_PLL_SPRDSPECT_CTRL1),
+ R("ddr_pll_lock_status", APHY_CSR_DDR_PLL_LOCK_STATUS),
+ R("ddr_pll_hold_ch", APHY_CSR_DDR_PLL_HOLD_CH),
+ R("ddr_pll_enable_ch", APHY_CSR_DDR_PLL_ENABLE_CH),
+ R("ddr_pll_bypass", APHY_CSR_DDR_PLL_BYPASS),
+ R("ddr_pll_pwrdwn", APHY_CSR_DDR_PLL_PWRDWN),
+ R("ddr_pll_ch0_deskew_ctrl", APHY_CSR_DDR_PLL_CH0_DESKEW_CTRL),
+ R("ddr_pll_ch1_deskew_ctrl", APHY_CSR_DDR_PLL_CH1_DESKEW_CTRL),
+ R("ddr_pll_deskew_status", APHY_CSR_DDR_PLL_DESKEW_STATUS),
+ R("addr_pad_drv_slew_ctrl", APHY_CSR_ADDR_PAD_DRV_SLEW_CTRL),
+ R("addr_pad_misc_ctrl", APHY_CSR_ADDR_PAD_MISC_CTRL),
+ R("addr_pvt_comp_ctrl", APHY_CSR_ADDR_PVT_COMP_CTRL),
+ R("addr_pvt_comp_ovrd_ctrl", APHY_CSR_ADDR_PVT_COMP_OVRD_CTRL),
+ R("addr_pvt_comp_status", APHY_CSR_ADDR_PVT_COMP_STATUS),
+ R("addr_pvt_comp_debug", APHY_CSR_ADDR_PVT_COMP_DEBUG),
+ R("phy_bist_cntrl_spr", APHY_CSR_PHY_BIST_CNTRL_SPR),
+ R("phy_bist_ca_crc_spr", APHY_CSR_PHY_BIST_CA_CRC_SPR),
+ R("addr_spr0_rw", APHY_CSR_ADDR_SPR0_RW),
+ R("addr_spr1_ro", APHY_CSR_ADDR_SPR1_RO),
+ R("addr_spr_ro", APHY_CSR_ADDR_SPR_RO)
+};
+
+static const struct debugfs_reg32 bcm2835_dphy_csr_regs[] = {
+ R("dq_rev_id", DPHY_CSR_DQ_REV_ID),
+ R("glbl_dq_dll_reset", DPHY_CSR_GLBL_DQ_DLL_RESET),
+ R("glbl_dq_dll_recalibrate", DPHY_CSR_GLBL_DQ_DLL_RECALIBRATE),
+ R("glbl_dq_dll_cntrl", DPHY_CSR_GLBL_DQ_DLL_CNTRL),
+ R("glbl_dq_dll_phase_ld_vl", DPHY_CSR_GLBL_DQ_DLL_PHASE_LD_VL),
+ R("glbl_dq_mstr_dll_byp_en", DPHY_CSR_GLBL_DQ_MSTR_DLL_BYP_EN),
+ R("glbl_mstr_dll_lock_stat", DPHY_CSR_GLBL_MSTR_DLL_LOCK_STAT),
+ R("byte0_slave_dll_offset", DPHY_CSR_BYTE0_SLAVE_DLL_OFFSET),
+ R("byte1_slave_dll_offset", DPHY_CSR_BYTE1_SLAVE_DLL_OFFSET),
+ R("byte2_slave_dll_offset", DPHY_CSR_BYTE2_SLAVE_DLL_OFFSET),
+ R("byte3_slave_dll_offset", DPHY_CSR_BYTE3_SLAVE_DLL_OFFSET),
+ R("byte0_master_dll_output", DPHY_CSR_BYTE0_MASTER_DLL_OUTPUT),
+ R("byte1_master_dll_output", DPHY_CSR_BYTE1_MASTER_DLL_OUTPUT),
+ R("byte2_master_dll_output", DPHY_CSR_BYTE2_MASTER_DLL_OUTPUT),
+ R("byte3_master_dll_output", DPHY_CSR_BYTE3_MASTER_DLL_OUTPUT),
+ R("norm_read_dqs_gate_ctrl", DPHY_CSR_NORM_READ_DQS_GATE_CTRL),
+ R("boot_read_dqs_gate_ctrl", DPHY_CSR_BOOT_READ_DQS_GATE_CTRL),
+ R("phy_fifo_pntrs", DPHY_CSR_PHY_FIFO_PNTRS),
+ R("dq_phy_misc_ctrl", DPHY_CSR_DQ_PHY_MISC_CTRL),
+ R("dq_pad_drv_slew_ctrl", DPHY_CSR_DQ_PAD_DRV_SLEW_CTRL),
+ R("dq_pad_misc_ctrl", DPHY_CSR_DQ_PAD_MISC_CTRL),
+ R("dq_pvt_comp_ctrl", DPHY_CSR_DQ_PVT_COMP_CTRL),
+ R("dq_pvt_comp_overrd_ctrl", DPHY_CSR_DQ_PVT_COMP_OVERRD_CTRL),
+ R("dq_pvt_comp_status", DPHY_CSR_DQ_PVT_COMP_STATUS),
+ R("dq_pvt_comp_debug", DPHY_CSR_DQ_PVT_COMP_DEBUG),
+ R("dq_phy_read_ctrl", DPHY_CSR_DQ_PHY_READ_CTRL),
+ R("dq_phy_read_status", DPHY_CSR_DQ_PHY_READ_STATUS),
+ R("dq_spr_rw", DPHY_CSR_DQ_SPR_RW),
+ R("dq_spr1_ro", DPHY_CSR_DQ_SPR1_RO),
+ R("dq_spr_ro", DPHY_CSR_DQ_SPR_RO),
+ R("crc_ctrl", DPHY_CSR_CRC_CTRL),
+ R("crc_data", DPHY_CSR_CRC_DATA),
};
+static void bcm2835_sdram_debugfs_regset(struct platform_device *pdev,
+ const char *name,
+ const struct debugfs_reg32 *reg32,
+ size_t size,
+ void *base)
+{
+ struct bcm2835_sdram_data *data = platform_get_drvdata(pdev);
+ struct debugfs_regset32 *regset;
+
+ regset = devm_kzalloc(&pdev->dev, sizeof(*regset),
+ GFP_KERNEL);
+ if (!regset)
+ return;
+
+ regset->regs = reg32;
+ regset->nregs = size;
+ regset->base = base;
+
+ debugfs_create_regset32(name, S_IRUGO,
+ data->debugfsdir, regset);
+}
+
+static void bcm2835_sdram_debugfs(struct platform_device *pdev)
+{
+ struct bcm2835_sdram_data *data = platform_get_drvdata(pdev);
+
+ data->debugfsdir = debugfs_create_dir("bcm2835_sdram", NULL);
+ if (!data->debugfsdir)
+ return;
+
+ bcm2835_sdram_debugfs_regset(pdev, "sdram-regset",
+ bcm2835_sdram_regs,
+ ARRAY_SIZE(bcm2835_sdram_regs),
+ data->sdram_regs);
+ bcm2835_sdram_debugfs_regset(pdev, "aphy_csr-regset",
+ bcm2835_aphy_csr_regs,
+ ARRAY_SIZE(bcm2835_aphy_csr_regs),
+ data->aphy_csr_regs);
+ bcm2835_sdram_debugfs_regset(pdev, "dphy_csr-regset",
+ bcm2835_dphy_csr_regs,
+ ARRAY_SIZE(bcm2835_dphy_csr_regs),
+ data->dphy_csr_regs);
+}
+
static int bcm2835_sdram_probe_reg(struct platform_device *pdev,
const char *name,
void __iomem **ptr)
@@ -105,6 +428,18 @@ static int bcm2835_sdram_probe(struct platform_device *pdev)
clk_prepare_enable(data->clk_lv);
clk_prepare_enable(data->clk_pll_parent);
+ /* setup debugfs */
+ bcm2835_sdram_debugfs(pdev);
+
+ return 0;
+}
+
+static int bcm2835_sdram_remove(struct platform_device *pdev)
+{
+ struct bcm2835_sdram_data *data = platform_get_drvdata(pdev);
+
+ debugfs_remove_recursive(data->debugfsdir);
+
return 0;
}
@@ -116,6 +451,7 @@ MODULE_DEVICE_TABLE(of, bcm2835_sdram_of_match_table);
static struct platform_driver bcm2835_sdram_driver = {
.probe = bcm2835_sdram_probe,
+ .remove = bcm2835_sdram_remove,
.driver = {
.name = "bcm2835_sdram",
.of_match_table = bcm2835_sdram_of_match_table,
--
2.1.4
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