133 lines
3.6 KiB
Diff
133 lines
3.6 KiB
Diff
From e3879246ad6fec0e577d8447f9772da8a2647ba2 Mon Sep 17 00:00:00 2001
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From: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
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Date: Thu, 4 May 2023 23:06:47 +0300
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Subject: [PATCH 451/469] nvmem: rockchip-otp: Add support for RK3588
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Add support for the OTP memory device found on the Rockchip RK3588 SoC.
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While here, remove the unnecessary 'void *' casts in the OF device ID
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table.
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Co-developed-by: Finley Xiao <finley.xiao@rock-chips.com>
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Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
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Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
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Tested-by: Vincent Legoll <vincent.legoll@gmail.com>
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Reviewed-by: Heiko Stuebner <heiko@sntech.de>
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Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
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---
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drivers/nvmem/rockchip-otp.c | 78 +++++++++++++++++++++++++++++++++++-
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1 file changed, 76 insertions(+), 2 deletions(-)
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diff --git a/drivers/nvmem/rockchip-otp.c b/drivers/nvmem/rockchip-otp.c
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index 84bf956cc4e1..cb9aa5428350 100644
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--- a/drivers/nvmem/rockchip-otp.c
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+++ b/drivers/nvmem/rockchip-otp.c
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@@ -54,6 +54,19 @@
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#define OTPC_TIMEOUT 10000
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+/* RK3588 Register */
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+#define RK3588_OTPC_AUTO_CTRL 0x04
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+#define RK3588_OTPC_AUTO_EN 0x08
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+#define RK3588_OTPC_INT_ST 0x84
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+#define RK3588_OTPC_DOUT0 0x20
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+#define RK3588_NO_SECURE_OFFSET 0x300
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+#define RK3588_NBYTES 4
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+#define RK3588_BURST_NUM 1
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+#define RK3588_BURST_SHIFT 8
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+#define RK3588_ADDR_SHIFT 16
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+#define RK3588_AUTO_EN BIT(0)
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+#define RK3588_RD_DONE BIT(1)
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+
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struct rockchip_data {
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int size;
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const char * const *clks;
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@@ -171,6 +184,52 @@ static int px30_otp_read(void *context, unsigned int offset,
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return ret;
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}
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+static int rk3588_otp_read(void *context, unsigned int offset,
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+ void *val, size_t bytes)
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+{
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+ struct rockchip_otp *otp = context;
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+ unsigned int addr_start, addr_end, addr_len;
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+ int ret, i = 0;
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+ u32 data;
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+ u8 *buf;
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+
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+ addr_start = round_down(offset, RK3588_NBYTES) / RK3588_NBYTES;
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+ addr_end = round_up(offset + bytes, RK3588_NBYTES) / RK3588_NBYTES;
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+ addr_len = addr_end - addr_start;
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+ addr_start += RK3588_NO_SECURE_OFFSET;
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+
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+ buf = kzalloc(array_size(addr_len, RK3588_NBYTES), GFP_KERNEL);
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+ if (!buf)
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+ return -ENOMEM;
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+
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+ while (addr_len--) {
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+ writel((addr_start << RK3588_ADDR_SHIFT) |
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+ (RK3588_BURST_NUM << RK3588_BURST_SHIFT),
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+ otp->base + RK3588_OTPC_AUTO_CTRL);
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+ writel(RK3588_AUTO_EN, otp->base + RK3588_OTPC_AUTO_EN);
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+
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+ ret = rockchip_otp_wait_status(otp, RK3588_OTPC_INT_ST,
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+ RK3588_RD_DONE);
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+ if (ret < 0) {
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+ dev_err(otp->dev, "timeout during read setup\n");
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+ goto read_end;
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+ }
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+
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+ data = readl(otp->base + RK3588_OTPC_DOUT0);
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+ memcpy(&buf[i], &data, RK3588_NBYTES);
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+
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+ i += RK3588_NBYTES;
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+ addr_start++;
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+ }
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+
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+ memcpy(val, buf + offset % RK3588_NBYTES, bytes);
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+
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+read_end:
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+ kfree(buf);
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+
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+ return ret;
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+}
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+
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static int rockchip_otp_read(void *context, unsigned int offset,
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void *val, size_t bytes)
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{
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@@ -213,14 +272,29 @@ static const struct rockchip_data px30_data = {
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.reg_read = px30_otp_read,
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};
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+static const char * const rk3588_otp_clocks[] = {
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+ "otp", "apb_pclk", "phy", "arb",
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+};
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+
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+static const struct rockchip_data rk3588_data = {
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+ .size = 0x400,
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+ .clks = rk3588_otp_clocks,
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+ .num_clks = ARRAY_SIZE(rk3588_otp_clocks),
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+ .reg_read = rk3588_otp_read,
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+};
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+
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static const struct of_device_id rockchip_otp_match[] = {
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{
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.compatible = "rockchip,px30-otp",
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- .data = (void *)&px30_data,
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+ .data = &px30_data,
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},
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{
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.compatible = "rockchip,rk3308-otp",
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- .data = (void *)&px30_data,
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+ .data = &px30_data,
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+ },
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+ {
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+ .compatible = "rockchip,rk3588-otp",
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+ .data = &rk3588_data,
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},
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{ /* sentinel */ },
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};
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--
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2.34.1
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